80_FR_15690 80 FR 15634 - Entergy Operations, Inc., Arkansas Nuclear One, Unit 1

80 FR 15634 - Entergy Operations, Inc., Arkansas Nuclear One, Unit 1

NUCLEAR REGULATORY COMMISSION

Federal Register Volume 80, Issue 56 (March 24, 2015)

Page Range15634-15638
FR Document2015-06700

The U.S. Nuclear Regulatory Commission (NRC) is issuing an exemption in response to a March 20, 2014, request from Entergy Operations, Inc. (Entergy or the licensee), from the requirements to use Charpy V-notch (C<INF>V</INF>) and drop weight-based methodology to determine initial nil-ductility reference temperature (RT<INF>NDT</INF>) for use in evaluating the integrity of Linde 80 weld materials in the reactor pressure vessel (RPV) beltline at Arkansas Nuclear One (ANO), Unit 1. This exemption would allow the licensee to use an alternate methodology to incorporate fracture toughness test data to determine RT<INF>NDT</INF> values for use in the evaluation of the RPV beltline weld material integrity in support of the development of updated pressure-temperature limit curves.

Federal Register, Volume 80 Issue 56 (Tuesday, March 24, 2015)
[Federal Register Volume 80, Number 56 (Tuesday, March 24, 2015)]
[Notices]
[Pages 15634-15638]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2015-06700]


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NUCLEAR REGULATORY COMMISSION

[Docket No. 50-313; NRC-2015-0069]


Entergy Operations, Inc., Arkansas Nuclear One, Unit 1

AGENCY: Nuclear Regulatory Commission.

ACTION: Exemption; issuance.

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SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing an 
exemption in response to a March 20, 2014, request from Entergy 
Operations, Inc. (Entergy or the licensee), from the requirements to 
use Charpy V-notch (CV) and drop weight-based methodology to 
determine initial nil-ductility reference temperature 
(RTNDT) for use in evaluating the integrity of Linde 80 weld 
materials in the reactor pressure vessel (RPV) beltline at Arkansas 
Nuclear One (ANO), Unit 1. This exemption would allow the licensee to 
use an alternate methodology to incorporate fracture toughness test 
data to determine RTNDT values for use in the evaluation of 
the RPV beltline weld material integrity in support of the development 
of updated pressure-temperature limit curves.

DATES: March 24, 2015.

ADDRESSES: Please refer to Docket ID NRC-2015-0069 when contacting the 
NRC about the availability of information regarding this document. You 
may obtain publicly-available information related to this document 
using any of the following methods:

[[Page 15635]]

     Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC-2015-0069. Address 
questions about NRC dockets to Carol Gallagher; telephone: 301-415-
3463; email: [email protected]. For technical questions, contact 
the individual listed in the FOR FURTHER INFORMATION CONTACT section of 
this document.
     NRC's Agencywide Documents Access and Management System 
(ADAMS): You may obtain publicly-available documents online in the 
ADAMS Public Documents collection at http://www.nrc.gov/reading-rm/adams.html. To begin the search, select ``ADAMS Public Documents'' and 
then select ``Begin Web-based ADAMS Search.'' For problems with ADAMS, 
please contact the NRC's Public Document Room (PDR) reference staff at 
1-800-397-4209, 301-415-4737, or by email to [email protected]. The 
ADAMS accession number for each document referenced (if it is available 
in ADAMS) is provided the first time that a document is referenced.
     NRC's PDR: You may examine and purchase copies of public 
documents at the NRC's PDR, Room O1-F21, One White Flint North, 11555 
Rockville Pike, Rockville, Maryland 20852.

FOR FURTHER INFORMATION CONTACT: Andrea George, Office of Nuclear 
Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 
20555-0001; telephone: 301-415-1081, email: [email protected].

SUPPLEMENTARY INFORMATION:

I. Background

    Entergy is the holder of renewed Facility Operating License No. 
DPR-51, that authorizes operation of ANO, Unit 1. The license provides, 
among other things, that the facility is subject to all rules, 
regulations, and orders of the NRC now or hereafter in effect.
    The ANO facility consists of two pressurized-water reactors, Units 
1 and 2, located in Pope County, Arkansas.

II. Request/Action

    Part 50 of title 10 of the Code of Federal Regulation (10 CFR), 
appendix G, ``Fracture Toughness Requirements,'' specifies fracture 
toughness requirements for ferritic materials of pressure-retaining 
components of the reactor coolant pressure boundary of light water 
reactors to provide adequate margins of safety during any condition of 
normal operation, including anticipated operational occurrences and 
system hydrostatic tests, to which the pressure boundary may be 
subjected to over its service lifetime. Section 50.61, ``Fracture 
toughness requirements for protection against pressurized thermal shock 
[PTS] events,'' provides fracture toughness requirements for protection 
against PTS events. A PTS event is an event or transient in pressurized 
water reactors (PWRs) causing severe overcooling (thermal shock) 
concurrent with or followed by significant pressure in the reactor 
vessel. Pursuant to 10 CFR 50.12, ``Specific exemptions,'' by letter 
dated March 20, 2014 (ADAMS Accession No. ML14083A640), as supplemented 
by letter dated June 26, 2014 (ADAMS Accession No. ML14177A302), the 
licensee requested an exemption from certain requirements of 10 CFR 
part 50, appendix G, and 10 CFR 50.61, to revise certain ANO, Unit 1 
RPV initial (unirradiated) properties using AREVA Topical Report (TR) 
BAW-2308, Revisions 1-A and 2-A, ``Initial RTNDT [nil-ductility 
reference temperature] of Linde 80 Weld Materials.''
    Specifically, the licensee requested an exemption from 10 CFR part 
50, appendix G.II.D(i), which requires that licensees evaluate the pre-
service or unirradiated RTNDT according to the procedures in 
the American Society of Mechanical Engineers (ASME) Code, Paragraph NB-
2331, ``Material for Vessels.'' The ASME Code Paragraph NB-2331 
requires that licensees use Charpy V-notch (CV) and drop 
weight-based methodology to derive the initial RTNDT values. 
In lieu of the existing methodology described above, the licensee 
requested to use the alternate methodology in TR BAW-2308, Revisions 1-
A and 2-A, to incorporate the use of fracture toughness test data for 
evaluating the integrity of the ANO, Unit 1, Linde 80 weld materials in 
the RPV beltline. The methodology in TR BAW-2308, Revisions 1-A and 2-
A, is based on the use of the 1997 and 2002 editions of the American 
Society for Testing and Materials (ASTM) Standard Test Method E1921 
(ASTM E1921), ``Standard Test Method for Determination of Reference 
Temperature T0 for Ferritic Steels in the Transition Range,'' and ASME 
Code Case N-629, ``Use of Fracture Toughness Test Data to Establish 
Reference Temperature for Pressure Retaining Materials, Section III, 
Division 1, Class 1.'' Since the licensee is proposing an alternate 
method to the CV and drop weight-based test data required by 
procedures in the ASME Code, Paragraph NB-2331, an exemption from 
portions of 10 CFR part 50, appendix G, is required.
    The licensee also requested an exemption from 10 CFR 50.61(a)(5), 
which defines the method for evaluating initial (unirradiated) 
RTNDT as one that uses the procedures in ASME Code, 
Paragraph NB-2331, which requires the use of CV and drop 
weight-based test data. 10 CFR 50.61(a)(5) alternatively defines the 
method for evaluating RTNDT as a method other than that of 
ASME Code, Paragraph NB-2331 approved by the Director, Office of 
Nuclear Reactor Regulation (NRR). The licensee proposes to use the 
alternate methodology described above, in AREVA TR BAW-2308,'' 
Revisions 1-A and 2-A, to determine the initial RTNDT values 
for the Linde 80 weld materials present in the ANO, Unit 1, RPV 
beltline region, which is not the procedure in ASME Code, Paragraph NB-
2331 or an alternative method approved by the Director of NRR. 
Therefore, an exemption from 10 CFR 50.61(a)(5) is required.

III. Discussion

    Pursuant to 10 CFR 50.12, the Commission may, upon application by 
any interested person or upon its own initiative, grant exemptions from 
the requirements of 10 CFR part 50 when: (1) The exemptions are 
authorized by law, will not present an undue risk to public health or 
safety, and are consistent with the common defense and security; and 
(2) when special circumstances are present. Under 10 CFR 
50.12(a)(2)(ii), special circumstances include, among other things, 
when application of the specific regulation in the particular 
circumstance would not serve, or is not necessary to achieve, the 
underlying purpose of the rule.

A. Authorized by Law

    As stated above, 10 CFR 50.12(a) allows the NRC to grant exemptions 
from portions of the requirements of 10 CFR part 50, appendix G and 10 
CFR 50.61. Moreover, Section 50.60(b) of 10 CFR part 50 specifically 
allows the use of alternative methods for determining the initial 
material properties to 10 CFR part 50, appendix G, or portions thereof, 
when an exemption is granted by the Commission under 10 CFR 50.12. 
Because the regulations contemplate exemptions, granting the licensee's 
proposed exemption will not result in a violation of the Atomic Energy 
Act of 1954, as amended, or the NRC's regulations. Finally, this 
exemption would allow the licensee to make use of fracture toughness 
test data for evaluating the integrity of the ANO, Unit 1 RPV Linde 80 
beltline weld materials, and would not result in changes to the 
operation of the plant. Therefore, the exemption is authorized by law.

[[Page 15636]]

C. No Undue Risk to Public Health and Safety

    The underlying purpose of appendix G to 10 CFR part 50 is to set 
forth fracture toughness requirements for ferritic materials of 
pressure-retaining components of the reactor coolant pressure boundary 
of light-water nuclear power reactors to provide adequate margins of 
safety during any conditions of normal operation, including anticipated 
operational occurrences and system hydrostatic tests, to which the 
pressure boundary may be subjected over its service lifetime. The 
methodology underlying the requirements of appendix G to 10 CFR part 50 
is based on the use of CV and drop weight test data because 
of the reference to the ASME Code, Section III, Paragraph NB-2331. The 
licensee proposes to replace the use of existing CV and drop 
weight-based methodology with an alternate methodology that uses 
fracture toughness test data to demonstrate compliance with appendix G 
to 10 CFR part 50. The alternate method, described in AREVA TR BAW-
2308, Revisions 1-A and 2-A, utilizes fracture toughness data to 
determine the initial RTNDT of the Linde 80 weld materials 
present in the ANO, Unit 1 RPV beltline.
    The NRC staff has concluded that the requested exemption to 
Appendix G to 10 CFR part 50 is justified because the licensee will 
utilize the fracture toughness methodology specified in BAW-2308, 
Revisions 1-A and 2-A, within the conditions and limitations delineated 
in the NRC staff's safety evaluations (SEs) dated August 4, 2005, and 
March 24, 2008 (ADAMS Accession Nos. ML052070408 and ML080770349, 
respectively). The use of the methodology specified in the NRC staff's 
SEs will ensure that pressure-temperature limits developed for the ANO, 
Unit 1 RPV will continue to be based on an adequately conservative 
estimate of RPV material properties and ensure that the pressure-
retaining components of the reactor coolant pressure boundary retain 
adequate margins of safety during any condition of normal operation, 
including anticipated operational occurrences. This exemption only 
modifies the methodology to be used by the licensee under 10 CFR part 
50, appendix G.II.D(i) and does not exempt the licensee from meeting 
any other requirement of appendix G to 10 CFR part 50.
    Based on the above information, no new accident precursors are 
created by allowing an exemption from the use of the existing 
CV and drop weight-based methodology and the use of an 
alternative fracture toughness-based methodology to demonstrate 
compliance with appendix G to 10 CFR part 50; thus, the probability of 
postulated accidents is not increased. Also, based on the above 
information, the consequences of postulated accidents are not 
increased. Therefore, there is no undue risk to public health and 
safety associated with the proposed exemption to appendix G to 10 CFR 
part 50.
    The underlying purpose of 10 CFR 50.61 is to establish requirements 
for evaluating the fracture toughness of RPV materials to ensure that a 
licensee's RPV will be protected from failure during a PTS event. The 
licensee seeks an exemption from portions of 10 CFR 50.61 to use a 
methodology for the determination of adjusted/indexing PTS reference 
temperature (RTPTS) values. The licensee proposes to use the 
methodology of TR BAW-2308, Revisions 1-A and 2-A as an alternative to 
the CV and drop weight-based methodology required by 10 CFR 
50.61 for determining the initial, unirradiated properties when 
calculating RTPTS. The NRC has concluded that the exemption 
is justified because the licensee will utilize the methodology 
specified in the NRC staff's SEs regarding TR BAW-2308, Revisions 1-A 
and 2-A.
    In TR BAW-2308, Revision 1-A, the Babcock and Wilcox Owners Group 
proposed to perform fracture toughness testing based on the application 
of the Master Curve evaluation procedure, which permits data obtained 
from sample sets tested at different temperatures to be combined, as 
the basis for defining the initial material properties of Linde 80 
welds based on T0 (initial temperature). The NRC staff 
evaluated this methodology for determining Linde 80 weld initial 
material properties and uncertainty in those properties, as well as the 
overall method for combining initial material property measurements 
based on T0 values (i.e. initial unirradiated nil-ductility 
reference temperature (IRTT0) in the BAW-2308 terminology), 
with property shifts from models in Regulatory Guide (RG) 1.99, 
Revision 2, ``Radiation Embrittlement of Reactor Vessel Materials,'' 
which are based on CV testing and defined margin term to 
account for uncertainties in the NRC staff's SE for TR BAW-2308, 
Revision 1-A. In the same NRC staff SE., Table 3, ``NRC Staff-Accepted 
IRTT0 and [Initial Margin] [sigma]i Values for 
Linde 80 Weld Wire Heats,'' contains the NRC staff's accepted 
IRTT0 and initial margin (denoted as [sigma]i) 
for specific Linde 80 weld wire heat numbers.
    In accordance with the limitations and conditions outlined in the 
NRC staff's SE for TR BAW-2308, Revision 1-A, for utilizing the values 
in Table 3: The licensee has (1) utilized the appropriate NRC staff-
accepted IRTT0 and [sigma]i values for applicable 
Linde 80 weld wire heat numbers; (2) applied a minimum chemistry factor 
of 167 degrees Fahrenheit ([deg]F) (values greater than 
167[emsp14][deg]F were used for certain Linde 80 weld wire heat numbers 
if RG 1.99, Revision 2 indicated higher chemistry factors); (3) applied 
a value of 28 [deg]F for [sigma][Delta] (i.e., shift margin) in the 
margin term; and (4) submitted values for [Delta]RTNDT and 
the margin term for each Linde 80 weld in the RPV though the end of the 
current operating license. Additionally, the NRC's SE for TR BAW-2308, 
Revision 2-A concludes that the revised IRTT0 and 
[sigma]i values for Linde 80 weld materials are acceptable 
for referencing in plant-specific licensing applications as delineated 
in TR BAW-2308, Revision 2-A and to the extent specified under Section 
4.0, ``Limitations and Conditions,'' of the SE. Incidentally, although 
Section 4.0 of the NRC staff SE states ``Future plant-specific 
applications for RPVs containing weld heat 72105, and weld heat 299L44, 
of Linde 80 must use the revised IRTT0 and 
[sigma]i values in TR BAW-2308, Revision 2,'' the NRC notes 
that neither of these weld heats is used at ANO, Unit 1. Therefore, 
this condition does not apply to ANO, Unit 1.
    During review of the licensee's exemption request, the NRC staff 
noted that additional information was required in order to complete its 
review regarding the chemistry factors used by the licensee for 
calculating [Delta]RTNDT values. The NRC staff requested 
this additional information via letter dated June 4, 2014 (ADAMS 
Accession No. ML14148A382). In the licensee's supplement dated June 26, 
2014, the licensee provided the chemistry factors in Table 1, ``10 CFR 
50.61 Chemistry Factors for the ANO-1 RV [Reactor Vessel] Materials.'' 
The NRC staff confirmed that the chemistry factors used by the licensee 
in calculating the RTNDT values were determined using the 
methodology of RG 1.99, Revision 2, and that 167 [deg]F is the minimum 
chemistry factor for Linde 80 materials.
    The use of the methodology in TR BAW-2308, Revisions 1-A and 2-A, 
will ensure the PTS evaluation developed for the ANO, Unit 1 RPV will 
continue to be based on an adequately conservative estimate of RPV 
material properties and ensure that the RPV will be protected from 
failure during a PTS event. Based on the evaluations above, the NRC 
staff has concluded that all

[[Page 15637]]

conditions and limitations outlined in the NRC staff's SEs for TR BAW-
2308, Revisions 1-A and 2-A, have been met for ANO Unit 1.
    Based on the above information, no new accident precursors are 
created by allowing an exemption to the alternate methodology to comply 
with the requirements of 10 CFR 50.61 in determining adjusted/indexing 
reference temperatures; thus, the probability of postulated accidents 
is not increased. Also, based on the above information, the 
consequences of postulated accidents are not increased. Therefore there 
is no undue risk to public health and safety.

D. Consistent With the Common Defense and Security

    The licensee requested an exemption in order to utilize an 
alternative methodology from that specified in portions of 10 CFR part 
50, appendix G, and 10 CFR 50.61, to allow the use of fracture 
toughness test data for evaluating the integrity of the ANO, Unit 1 RPV 
beltline Linde 80 weld materials. This exemption request is not related 
to, and does not impact, any security issues at ANO, Unit 1. Therefore, 
the NRC has determined that this exemption does not impact, and is 
consistent with, the common defense and security.

E. Special Circumstances

    Special circumstances, in accordance with 10 CFR 50.12(a)(2)(ii), 
are present whenever application of the regulation in the particular 
circumstances would not serve the underlying purpose of the rule or is 
not necessary to achieve the underlying purpose of the rule. The 
underlying purpose of 10 CFR 50.61(a)(5) and 10 CFR part 50, appendix 
G.II.D(i) is to set forth fracture toughness requirements (e.g., 
initial RTNDT values) for ferritic materials of pressure-
retaining components of the reactor coolant pressure boundary of light 
water nuclear power reactors, in order to provide adequate margins of 
safety during any conditions of normal operation, including anticipated 
operational occurrences and system hydrostatic tests, to which the 
pressure boundary may be subjected over its service lifetime. The 
underlying purpose of 10 CFR 50.61 is to establish requirements for 
evaluating the fracture toughness of RPV materials to ensure that a 
licensee's RPV will be protected from failure during a PTS event.
    Entergy's exemption request proposes an alternate methodology to 
evaluate the RTNDT of Linde 80 weld materials in the RPV 
beltline region at ANO, Unit 1, based on fracture toughness test data 
found in AREVA TR BAW-2308, Revision 1-A and 2-A (in accordance with 
ASTM Standard E1921 and ASME Code Case N-629). This proposed alternate 
methodology achieves the underlying purpose of 10 CFR part 50 appendix 
G.II.D(i) because it provides an adequate conservative estimate of RPV 
materials properties and ensures that the pressure-retaining components 
of the RPV retain adequate margins for safety during any condition of 
normal operation. The alternate methodology also achieves the 
underlying purpose of 10 CFR 50.61(a)(5) because it will ensure that 
the PTS evaluation developed for the ANO, Unit 1 RPV will continue to 
be based on an adequately conservative estimate of RPV material 
properties and ensure that the RPV will be protected from failure 
during a PTS event. Accordingly, the NRC has concluded that using the 
procedures in the ASME Code, Paragraph NB-2331 is not necessary to 
achieve the underlying purpose of 10 CFR 50.61(a)(5) and 10 CFR part 50 
appendix G.II.D(i). Therefore, the special circumstances required by 10 
CFR 50.12(a)(2)(ii) for the granting of an exemption exist.

F. Environmental Considerations

    The NRC staff determined that the exemption discussed herein meets 
the eligibility criteria for the categorical exclusion set forth in 10 
CFR 51. 22(c)(9) because it is related to a requirement concerning the 
installation or use of a facility component located within the 
restricted area, as defined in 10 CFR part 20, and issuance of this 
exemption involves: (i) No significant hazards consideration, (ii) no 
significant change in the types or a significant increase in the 
amounts of any effluents that may be released offsite, and (iii) no 
significant increase in individual or cumulative occupational radiation 
exposure. Therefore, in accordance with 10 CFR 51.22(b), no 
environmental impact statement or environmental assessment need be 
prepared in connection with the NRC's consideration of this exemption 
request. The basis for the NRC staff's determination is discussed as 
follows with an evaluation against each of the requirements in 10 CFR 
51. 22(c)(9)(i)-(iii).
Requirements in 10 CFR 51.22(c)(9)(i)
    The NRC evaluated whether the exemption involves no significant 
hazards consideration using the standards described in 10 CFR 50.92(c), 
as presented below:
1. Does the proposed exemption involve a significant increase in the 
probability or consequences of an accident previously evaluated?
    Response: No.
    The exemption would allow the use of alternate methodologies from 
those specified in appendix G to 10 CFR part 50, and 10 CFR 50.61, to 
allow the use of fracture toughness test data for evaluating the 
integrity of RPV beltline welds. Use of the alternate methodology for 
determining the initial, unirradiated material reference temperatures 
of the Linde 80 weld materials present in the RPV beltline region will 
not result in changes in operation of configuration of the facility. 
The change in reactor vessel material initial properties will continue 
to satisfy the intent of 10 CFR 50, Appendix G, and 10 CFR 50.61. The 
change does not adversely affect accident initiators or pre-cursors, 
nor alter the design assumptions, conditions, or the manner in which 
the plant is operated and maintained. The change does not alter or 
prevent the ability of structures, systems or components from 
performing their intended function to mitigate the consequences of an 
initiating event with the assumed acceptance limits. There will be no 
adverse change to normal plant operating parameters, engineered safety 
feature actuation setpoints, accident mitigation capabilities, or 
accident analysis assumptions or inputs. The change does not affect the 
source term, containment isolation, or radiological release assumptions 
used in evaluating the radiological consequences of an accident 
previously evaluated. Further, the change does not increase the types 
of amounts of radioactive effluent that may be released offsite, nor 
significantly increase individual or cumulative occupational/public 
radiation exposures.
    Therefore, the proposed exemption does not involve a significant 
increase in the probability or consequences of an accident previously 
evaluated.
2. Does the proposed exemption create the possibility of a new or 
different kind of accident from any accident previously evaluated?
    Response: No.
    The exemption would allow the use of alternate methodologies from 
those specified in appendix G to 10 CFR part 50, and 10 CFR 50.61, to 
allow the use of fracture toughness test data for evaluating the 
integrity of RPV beltline welds. Use of the alternate methodology for 
determining the initial, unirradiated material reference temperatures 
of the Linde 80 weld materials present in the

[[Page 15638]]

RPV beltline region will not result in changes in operation or 
configuration of the facility. The change does not impose any new or 
different requirements or eliminate any existing requirements. The 
change is consistent with the current safety analysis assumptions and 
current plant operating practice. No new accident scenarios, transient 
precursors, failure mechanisms, or limiting single failures are 
introduced as a result of the proposed change. Equipment important to 
safety will continue to operate as designed. The change does not result 
in any event previously deemed incredible being more credible. The 
change does not result in any adverse conditions or result in any 
increase in the challenges to safety systems.
    Therefore, this change does not create the possibility of a new or 
different kind of accident from an accident previously evaluated.
3. Does the proposed exemption involve a significant reduction in a 
margin of safety?
    Response: No.
    The proposed exemption does not alter safety limits, limiting 
safety system settings, or limiting conditions for operation. The 
setpoints at which protective actions are initiated are not altered by 
the change. There are no new or significant changes to initial 
conditions contributing to accident severity or consequences. The 
exemption will not otherwise affect plant protective boundaries, will 
not cause a release of fission products to the public, nor will it 
degrade the performance of any other structures, systems or components 
important to safety.
    Therefore, the proposed exemption does not involve a significant 
reduction in a margin of safety.
    Based on the above evaluation of the standards set forth in 10 CFR 
50.92(c), the NRC concludes that the proposed exemption involves no 
significant hazards consideration. Accordingly, the requirements of 10 
CFR 51.22(c)(9)(i) are met.
Requirements in 10 CFR 51.22(c)(9)(ii-iii)
    The proposed exemption does not make any changes to the facility, 
equipment at the facility, or to fuel or core design. The proposed 
alternate methodology serves the same purpose as the requirements set 
forth in 10 CFR 50.61 and 10 CFR part 50, appendix G. Therefore, the 
NRC concludes that the exemption involves no significant change in the 
types or a significant increase in the amounts of any effluents that 
may be released offsite, and that there is no significant increase in 
individual or cumulative public or occupational radiation exposure.
    Therefore, the requirements of 10 CFR 51.22(c)(9)(ii-iii) are met.
Conclusion
    Based on the above, the NRC concludes that the proposed exemption 
meets the eligibility criteria for the categorical exclusion set forth 
in 10 CFR 51.22(c)(9). Therefore, in accordance with 10 CFR 51.22(b), 
no environmental impact statement or environmental assessment need be 
prepared in connection with the NRC's issuance of this exemption.

IV. Conclusions

    Accordingly, the Commission has determined that, pursuant to 10 CFR 
50.12(a), the exemption is authorized by law, will not present an undue 
risk to the public health and safety, and is consistent with the common 
defense and security. Also, special circumstances are present. 
Therefore, the Commission hereby grants the licensee an exemption from 
10 CFR part 50, appendix G.II.D(i) and 10 CFR 50.61(a)(5) requirements, 
in order to use the alternate methodology specified in AREVA TR BAW-
2308, Revisions 1-A and 2-A, in lieu of the existing requirement to use 
CV and drop weight-based methodologies to evaluate the 
initial (unirradiated) RTNDT of the Linde 80 weld materials 
in the RPV beltline region at ANO, Unit 1.
    This exemption is effective upon issuance.

    Dated at Rockville, Maryland, this 16th day of March 2015.

    For the Nuclear Regulatory Commission.
Michele G. Evans,
Director, Division of Operating Reactor Licensing, Office of Nuclear 
Reactor Regulation.
[FR Doc. 2015-06700 Filed 3-23-15; 8:45 am]
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                                                  15634                         Federal Register / Vol. 80, No. 56 / Tuesday, March 24, 2015 / Notices

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                                                  whether the collection of information is                engineering workforce, and U.S.
                                                  necessary for the proper performance of                 competitiveness in science, engineering,
                                                  the functions of the agency, including                  technology, and R&D. The SED is part                  NUCLEAR REGULATORY
                                                  whether the information will have                       of an integrated survey system that                   COMMISSION
                                                  practical utility; (b) the accuracy of the              fulfills the education and workforce
                                                                                                          components of this mission.                           [Docket No. 50–313; NRC–2015–0069]
                                                  agency’s estimate of burden including
                                                  the validity of the methodology and                        The SED has been conducted                         Entergy Operations, Inc., Arkansas
                                                  assumptions used; (c) ways to enhance                   annually since 1958 and is jointly                    Nuclear One, Unit 1
                                                  the quality, utility and clarity of the                 sponsored by six Federal agencies (NSF,
                                                  information to be collected; (d) ways to                National Institutes of Health, U.S.                   AGENCY:  Nuclear Regulatory
                                                  minimize the burden of the collection of                Department of Education, U.S.                         Commission.
                                                  information on those who are to                         Department of Agriculture, National                   ACTION: Exemption; issuance.
                                                  respond, including through the use of                   Endowment for the Humanities, and
                                                  appropriate automated, electronic,                      National Aeronautics and Space                        SUMMARY:   The U.S. Nuclear Regulatory
                                                  mechanical, or other technological                      Administration) in order to avoid                     Commission (NRC) is issuing an
                                                  collection techniques or other forms of                 duplication of effort in collecting such              exemption in response to a March 20,
                                                  information technology should be                        data. It is an accurate, timely source of             2014, request from Entergy Operations,
                                                  addressed to: Office of Information and                 information on an important national                  Inc. (Entergy or the licensee), from the
                                                  Regulatory Affairs of OMB, Attention:                   resource—highly educated individuals.                 requirements to use Charpy V-notch
                                                  Desk Officer for National Science                       Data are obtained via Web survey or                   (CV) and drop weight-based
                                                  Foundation, 725—17th Street NW.,                        paper questionnaire from each person                  methodology to determine initial nil-
                                                  Room 10235, Washington, DC 20503,                       earning a research doctorate at the time              ductility reference temperature (RTNDT)
                                                  and to Suzanne H. Plimpton, Reports                     they receive the degree. Graduate                     for use in evaluating the integrity of
                                                  Clearance Officer, National Science                     schools help distribute the SED to their              Linde 80 weld materials in the reactor
                                                  Foundation, 4201 Wilson Boulevard,                      graduating doctorate recipients. Data are             pressure vessel (RPV) beltline at
                                                  Suite 1265, Arlington, Virginia 22230 or                collected on the doctorate recipient’s                Arkansas Nuclear One (ANO), Unit 1.
                                                  send email to splimpto@nsf.gov.                         field of specialty, educational                       This exemption would allow the
                                                  Comments regarding these information                    background, sources of financial                      licensee to use an alternate methodology
                                                  collections are best assured of having                  support in graduate school, debt level,               to incorporate fracture toughness test
                                                  their full effect if received within 30                 postgraduation plans for employment,                  data to determine RTNDT values for use
                                                  days of this notification. Copies of the                and demographic characteristics.                      in the evaluation of the RPV beltline
                                                  submission(s) may be obtained by                           The survey will be collected in                    weld material integrity in support of the
                                                  calling 703–292–7556.                                   conformance with the National Science                 development of updated pressure-
                                                    It is not permissible for NSF to                      Foundation Act of 1950, as amended,                   temperature limit curves.
                                                                                                                                                                DATES: March 24, 2015.
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                                                  conduct or sponsor a collection of                      and the Privacy Act of 1974. Responses
                                                  information unless the collection of                    from individuals are voluntary. NSF                   ADDRESSES: Please refer to Docket ID
                                                  information displays a currently valid                  will ensure that all individually                     NRC–2015–0069 when contacting the
                                                  OMB control number and the agency                       identifiable information collected will               NRC about the availability of
                                                  informs potential persons who are to                    be kept strictly confidential and will be             information regarding this document.
                                                  respond to the collection of information                used for research or statistical purposes,            You may obtain publicly-available
                                                  that such persons are not required to                   analyzing data, and preparing scientific              information related to this document
                                                  respond to the collection of information                reports and articles.                                 using any of the following methods:


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                                                                                Federal Register / Vol. 80, No. 56 / Tuesday, March 24, 2015 / Notices                                           15635

                                                     • Federal Rulemaking Web site: Go to                 ‘‘Fracture toughness requirements for                 initial (unirradiated) RTNDT as one that
                                                  http://www.regulations.gov and search                   protection against pressurized thermal                uses the procedures in ASME Code,
                                                  for Docket ID NRC–2015–0069. Address                    shock [PTS] events,’’ provides fracture               Paragraph NB–2331, which requires the
                                                  questions about NRC dockets to Carol                    toughness requirements for protection                 use of CV and drop weight-based test
                                                  Gallagher; telephone: 301–415–3463;                     against PTS events. A PTS event is an                 data. 10 CFR 50.61(a)(5) alternatively
                                                  email: Carol.Gallagher@nrc.gov. For                     event or transient in pressurized water               defines the method for evaluating RTNDT
                                                  technical questions, contact the                        reactors (PWRs) causing severe                        as a method other than that of ASME
                                                  individual listed in the FOR FURTHER                    overcooling (thermal shock) concurrent                Code, Paragraph NB–2331 approved by
                                                  INFORMATION CONTACT section of this                     with or followed by significant pressure              the Director, Office of Nuclear Reactor
                                                  document.                                               in the reactor vessel. Pursuant to 10 CFR             Regulation (NRR). The licensee
                                                     • NRC’s Agencywide Documents                         50.12, ‘‘Specific exemptions,’’ by letter             proposes to use the alternate
                                                  Access and Management System                            dated March 20, 2014 (ADAMS                           methodology described above, in
                                                  (ADAMS): You may obtain publicly-                       Accession No. ML14083A640), as                        AREVA TR BAW–2308,’’ Revisions 1–A
                                                  available documents online in the                       supplemented by letter dated June 26,                 and 2–A, to determine the initial RTNDT
                                                  ADAMS Public Documents collection at                    2014 (ADAMS Accession No.                             values for the Linde 80 weld materials
                                                  http://www.nrc.gov/reading-rm/                          ML14177A302), the licensee requested                  present in the ANO, Unit 1, RPV
                                                  adams.html. To begin the search, select                 an exemption from certain requirements                beltline region, which is not the
                                                  ‘‘ADAMS Public Documents’’ and then                     of 10 CFR part 50, appendix G, and 10                 procedure in ASME Code, Paragraph
                                                  select ‘‘Begin Web-based ADAMS                          CFR 50.61, to revise certain ANO, Unit                NB–2331 or an alternative method
                                                  Search.’’ For problems with ADAMS,                      1 RPV initial (unirradiated) properties               approved by the Director of NRR.
                                                  please contact the NRC’s Public                         using AREVA Topical Report (TR)                       Therefore, an exemption from 10 CFR
                                                  Document Room (PDR) reference staff at                  BAW–2308, Revisions 1–A and 2–A,                      50.61(a)(5) is required.
                                                  1–800–397–4209, 301–415–4737, or by                     ‘‘Initial RTNDT [nil-ductility reference
                                                                                                                                                                III. Discussion
                                                  email to pdr.resource@nrc.gov. The                      temperature] of Linde 80 Weld
                                                  ADAMS accession number for each                         Materials.’’                                             Pursuant to 10 CFR 50.12, the
                                                  document referenced (if it is available in                 Specifically, the licensee requested an            Commission may, upon application by
                                                  ADAMS) is provided the first time that                  exemption from 10 CFR part 50,                        any interested person or upon its own
                                                  a document is referenced.                               appendix G.II.D(i), which requires that               initiative, grant exemptions from the
                                                     • NRC’s PDR: You may examine and                     licensees evaluate the pre-service or                 requirements of 10 CFR part 50 when:
                                                                                                          unirradiated RTNDT according to the                   (1) The exemptions are authorized by
                                                  purchase copies of public documents at
                                                                                                          procedures in the American Society of                 law, will not present an undue risk to
                                                  the NRC’s PDR, Room O1–F21, One
                                                                                                          Mechanical Engineers (ASME) Code,                     public health or safety, and are
                                                  White Flint North, 11555 Rockville
                                                                                                          Paragraph NB–2331, ‘‘Material for                     consistent with the common defense
                                                  Pike, Rockville, Maryland 20852.
                                                                                                          Vessels.’’ The ASME Code Paragraph                    and security; and (2) when special
                                                  FOR FURTHER INFORMATION CONTACT:                                                                              circumstances are present. Under 10
                                                                                                          NB–2331 requires that licensees use
                                                  Andrea George, Office of Nuclear                        Charpy V-notch (CV) and drop weight-                  CFR 50.12(a)(2)(ii), special
                                                  Reactor Regulation, U.S. Nuclear                        based methodology to derive the initial               circumstances include, among other
                                                  Regulatory Commission, Washington,                      RTNDT values. In lieu of the existing                 things, when application of the specific
                                                  DC 20555–0001; telephone: 301–415–                      methodology described above, the                      regulation in the particular
                                                  1081, email: Andrea.George@nrc.gov.                     licensee requested to use the alternate               circumstance would not serve, or is not
                                                  SUPPLEMENTARY INFORMATION:                              methodology in TR BAW–2308,                           necessary to achieve, the underlying
                                                                                                          Revisions 1–A and 2–A, to incorporate                 purpose of the rule.
                                                  I. Background
                                                                                                          the use of fracture toughness test data               A. Authorized by Law
                                                     Entergy is the holder of renewed                     for evaluating the integrity of the ANO,
                                                  Facility Operating License No. DPR–51,                  Unit 1, Linde 80 weld materials in the                   As stated above, 10 CFR 50.12(a)
                                                  that authorizes operation of ANO, Unit                  RPV beltline. The methodology in TR                   allows the NRC to grant exemptions
                                                  1. The license provides, among other                    BAW–2308, Revisions 1–A and 2–A, is                   from portions of the requirements of 10
                                                  things, that the facility is subject to all             based on the use of the 1997 and 2002                 CFR part 50, appendix G and 10 CFR
                                                  rules, regulations, and orders of the NRC               editions of the American Society for                  50.61. Moreover, Section 50.60(b) of 10
                                                  now or hereafter in effect.                             Testing and Materials (ASTM) Standard                 CFR part 50 specifically allows the use
                                                     The ANO facility consists of two                     Test Method E1921 (ASTM E1921),                       of alternative methods for determining
                                                  pressurized-water reactors, Units 1 and                 ‘‘Standard Test Method for                            the initial material properties to 10 CFR
                                                  2, located in Pope County, Arkansas.                    Determination of Reference                            part 50, appendix G, or portions thereof,
                                                                                                          Temperature T0 for Ferritic Steels in the             when an exemption is granted by the
                                                  II. Request/Action                                                                                            Commission under 10 CFR 50.12.
                                                                                                          Transition Range,’’ and ASME Code
                                                     Part 50 of title 10 of the Code of                   Case N–629, ‘‘Use of Fracture                         Because the regulations contemplate
                                                  Federal Regulation (10 CFR), appendix                   Toughness Test Data to Establish                      exemptions, granting the licensee’s
                                                  G, ‘‘Fracture Toughness Requirements,’’                 Reference Temperature for Pressure                    proposed exemption will not result in a
                                                  specifies fracture toughness                            Retaining Materials, Section III, Division            violation of the Atomic Energy Act of
                                                  requirements for ferritic materials of                  1, Class 1.’’ Since the licensee is                   1954, as amended, or the NRC’s
                                                  pressure-retaining components of the                    proposing an alternate method to the CV               regulations. Finally, this exemption
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                                                  reactor coolant pressure boundary of                    and drop weight-based test data                       would allow the licensee to make use of
                                                  light water reactors to provide adequate                required by procedures in the ASME                    fracture toughness test data for
                                                  margins of safety during any condition                  Code, Paragraph NB–2331, an                           evaluating the integrity of the ANO,
                                                  of normal operation, including                          exemption from portions of 10 CFR part                Unit 1 RPV Linde 80 beltline weld
                                                  anticipated operational occurrences and                 50, appendix G, is required.                          materials, and would not result in
                                                  system hydrostatic tests, to which the                     The licensee also requested an                     changes to the operation of the plant.
                                                  pressure boundary may be subjected to                   exemption from 10 CFR 50.61(a)(5),                    Therefore, the exemption is authorized
                                                  over its service lifetime. Section 50.61,               which defines the method for evaluating               by law.


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                                                  15636                         Federal Register / Vol. 80, No. 56 / Tuesday, March 24, 2015 / Notices

                                                  C. No Undue Risk to Public Health and                   alternative fracture toughness-based                     In accordance with the limitations
                                                  Safety                                                  methodology to demonstrate                            and conditions outlined in the NRC
                                                     The underlying purpose of appendix                   compliance with appendix G to 10 CFR                  staff’s SE for TR BAW–2308, Revision
                                                  G to 10 CFR part 50 is to set forth                     part 50; thus, the probability of                     1–A, for utilizing the values in Table 3:
                                                  fracture toughness requirements for                     postulated accidents is not increased.                The licensee has (1) utilized the
                                                  ferritic materials of pressure-retaining                Also, based on the above information,                 appropriate NRC staff-accepted IRTT0
                                                  components of the reactor coolant                       the consequences of postulated                        and si values for applicable Linde 80
                                                  pressure boundary of light-water                        accidents are not increased. Therefore,               weld wire heat numbers; (2) applied a
                                                  nuclear power reactors to provide                       there is no undue risk to public health               minimum chemistry factor of 167
                                                  adequate margins of safety during any                   and safety associated with the proposed               degrees Fahrenheit (°F) (values greater
                                                  conditions of normal operation,                         exemption to appendix G to 10 CFR part                than 167 °F were used for certain Linde
                                                  including anticipated operational                       50.                                                   80 weld wire heat numbers if RG 1.99,
                                                  occurrences and system hydrostatic                         The underlying purpose of 10 CFR                   Revision 2 indicated higher chemistry
                                                                                                          50.61 is to establish requirements for                factors); (3) applied a value of 28 °F for
                                                  tests, to which the pressure boundary
                                                                                                          evaluating the fracture toughness of RPV              sΔ (i.e., shift margin) in the margin term;
                                                  may be subjected over its service
                                                                                                          materials to ensure that a licensee’s RPV             and (4) submitted values for DRTNDT
                                                  lifetime. The methodology underlying
                                                                                                          will be protected from failure during a               and the margin term for each Linde 80
                                                  the requirements of appendix G to 10
                                                                                                          PTS event. The licensee seeks an                      weld in the RPV though the end of the
                                                  CFR part 50 is based on the use of CV
                                                                                                          exemption from portions of 10 CFR                     current operating license. Additionally,
                                                  and drop weight test data because of the
                                                                                                          50.61 to use a methodology for the                    the NRC’s SE for TR BAW–2308,
                                                  reference to the ASME Code, Section III,
                                                                                                          determination of adjusted/indexing PTS                Revision 2–A concludes that the revised
                                                  Paragraph NB–2331. The licensee
                                                                                                          reference temperature (RTPTS) values.                 IRTT0 and si values for Linde 80 weld
                                                  proposes to replace the use of existing
                                                                                                          The licensee proposes to use the                      materials are acceptable for referencing
                                                  CV and drop weight-based methodology                                                                          in plant-specific licensing applications
                                                  with an alternate methodology that uses                 methodology of TR BAW–2308,
                                                                                                          Revisions 1–A and 2–A as an alternative               as delineated in TR BAW–2308,
                                                  fracture toughness test data to                                                                               Revision 2–A and to the extent specified
                                                  demonstrate compliance with appendix                    to the CV and drop weight-based
                                                                                                          methodology required by 10 CFR 50.61                  under Section 4.0, ‘‘Limitations and
                                                  G to 10 CFR part 50. The alternate                                                                            Conditions,’’ of the SE. Incidentally,
                                                  method, described in AREVA TR BAW–                      for determining the initial, unirradiated
                                                                                                          properties when calculating RTPTS. The                although Section 4.0 of the NRC staff SE
                                                  2308, Revisions 1–A and 2–A, utilizes                                                                         states ‘‘Future plant-specific
                                                  fracture toughness data to determine the                NRC has concluded that the exemption
                                                                                                          is justified because the licensee will                applications for RPVs containing weld
                                                  initial RTNDT of the Linde 80 weld                                                                            heat 72105, and weld heat 299L44, of
                                                  materials present in the ANO, Unit 1                    utilize the methodology specified in the
                                                                                                          NRC staff’s SEs regarding TR BAW–                     Linde 80 must use the revised IRTT0 and
                                                  RPV beltline.                                                                                                 si values in TR BAW–2308, Revision 2,’’
                                                     The NRC staff has concluded that the                 2308, Revisions 1–A and 2–A.
                                                                                                                                                                the NRC notes that neither of these weld
                                                  requested exemption to Appendix G to                       In TR BAW–2308, Revision 1–A, the
                                                                                                                                                                heats is used at ANO, Unit 1. Therefore,
                                                  10 CFR part 50 is justified because the                 Babcock and Wilcox Owners Group                       this condition does not apply to ANO,
                                                  licensee will utilize the fracture                      proposed to perform fracture toughness                Unit 1.
                                                  toughness methodology specified in                      testing based on the application of the                  During review of the licensee’s
                                                  BAW–2308, Revisions 1–A and 2–A,                        Master Curve evaluation procedure,                    exemption request, the NRC staff noted
                                                  within the conditions and limitations                   which permits data obtained from                      that additional information was
                                                  delineated in the NRC staff’s safety                    sample sets tested at different                       required in order to complete its review
                                                  evaluations (SEs) dated August 4, 2005,                 temperatures to be combined, as the                   regarding the chemistry factors used by
                                                  and March 24, 2008 (ADAMS Accession                     basis for defining the initial material               the licensee for calculating DRTNDT
                                                  Nos. ML052070408 and ML080770349,                       properties of Linde 80 welds based on                 values. The NRC staff requested this
                                                  respectively). The use of the                           T0 (initial temperature). The NRC staff               additional information via letter dated
                                                  methodology specified in the NRC                        evaluated this methodology for                        June 4, 2014 (ADAMS Accession No.
                                                  staff’s SEs will ensure that pressure-                  determining Linde 80 weld initial                     ML14148A382). In the licensee’s
                                                  temperature limits developed for the                    material properties and uncertainty in                supplement dated June 26, 2014, the
                                                  ANO, Unit 1 RPV will continue to be                     those properties, as well as the overall              licensee provided the chemistry factors
                                                  based on an adequately conservative                     method for combining initial material                 in Table 1, ‘‘10 CFR 50.61 Chemistry
                                                  estimate of RPV material properties and                 property measurements based on T0                     Factors for the ANO–1 RV [Reactor
                                                  ensure that the pressure-retaining                      values (i.e. initial unirradiated nil-                Vessel] Materials.’’ The NRC staff
                                                  components of the reactor coolant                       ductility reference temperature (IRTT0)               confirmed that the chemistry factors
                                                  pressure boundary retain adequate                       in the BAW–2308 terminology), with                    used by the licensee in calculating the
                                                  margins of safety during any condition                  property shifts from models in                        RTNDT values were determined using
                                                  of normal operation, including                          Regulatory Guide (RG) 1.99, Revision 2,               the methodology of RG 1.99, Revision 2,
                                                  anticipated operational occurrences.                    ‘‘Radiation Embrittlement of Reactor                  and that 167 °F is the minimum
                                                  This exemption only modifies the                        Vessel Materials,’’ which are based on                chemistry factor for Linde 80 materials.
                                                  methodology to be used by the licensee                  CV testing and defined margin term to                    The use of the methodology in TR
                                                  under 10 CFR part 50, appendix G.II.D(i)                account for uncertainties in the NRC                  BAW–2308, Revisions 1–A and 2–A,
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                                                  and does not exempt the licensee from                   staff’s SE for TR BAW–2308, Revision                  will ensure the PTS evaluation
                                                  meeting any other requirement of                        1–A. In the same NRC staff SE., Table                 developed for the ANO, Unit 1 RPV will
                                                  appendix G to 10 CFR part 50.                           3, ‘‘NRC Staff-Accepted IRTT0 and                     continue to be based on an adequately
                                                     Based on the above information, no                   [Initial Margin] si Values for Linde 80               conservative estimate of RPV material
                                                  new accident precursors are created by                  Weld Wire Heats,’’ contains the NRC                   properties and ensure that the RPV will
                                                  allowing an exemption from the use of                   staff’s accepted IRTT0 and initial margin             be protected from failure during a PTS
                                                  the existing CV and drop weight-based                   (denoted as si) for specific Linde 80                 event. Based on the evaluations above,
                                                  methodology and the use of an                           weld wire heat numbers.                               the NRC staff has concluded that all


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                                                                                Federal Register / Vol. 80, No. 56 / Tuesday, March 24, 2015 / Notices                                            15637

                                                  conditions and limitations outlined in                  found in AREVA TR BAW–2308,                           1. Does the proposed exemption involve
                                                  the NRC staff’s SEs for TR BAW–2308,                    Revision 1–A and 2–A (in accordance                   a significant increase in the probability
                                                  Revisions 1–A and 2–A, have been met                    with ASTM Standard E1921 and ASME                     or consequences of an accident
                                                  for ANO Unit 1.                                         Code Case N–629). This proposed                       previously evaluated?
                                                     Based on the above information, no                   alternate methodology achieves the                       Response: No.
                                                  new accident precursors are created by                  underlying purpose of 10 CFR part 50                     The exemption would allow the use
                                                  allowing an exemption to the alternate                  appendix G.II.D(i) because it provides                of alternate methodologies from those
                                                  methodology to comply with the                          an adequate conservative estimate of                  specified in appendix G to 10 CFR part
                                                  requirements of 10 CFR 50.61 in                         RPV materials properties and ensures                  50, and 10 CFR 50.61, to allow the use
                                                  determining adjusted/indexing                           that the pressure-retaining components                of fracture toughness test data for
                                                  reference temperatures; thus, the
                                                                                                          of the RPV retain adequate margins for                evaluating the integrity of RPV beltline
                                                  probability of postulated accidents is
                                                                                                          safety during any condition of normal                 welds. Use of the alternate methodology
                                                  not increased. Also, based on the above
                                                                                                          operation. The alternate methodology                  for determining the initial, unirradiated
                                                  information, the consequences of
                                                                                                          also achieves the underlying purpose of               material reference temperatures of the
                                                  postulated accidents are not increased.
                                                  Therefore there is no undue risk to                     10 CFR 50.61(a)(5) because it will                    Linde 80 weld materials present in the
                                                  public health and safety.                               ensure that the PTS evaluation                        RPV beltline region will not result in
                                                                                                          developed for the ANO, Unit 1 RPV will                changes in operation of configuration of
                                                  D. Consistent With the Common Defense                   continue to be based on an adequately                 the facility. The change in reactor vessel
                                                  and Security                                            conservative estimate of RPV material                 material initial properties will continue
                                                     The licensee requested an exemption                  properties and ensure that the RPV will               to satisfy the intent of 10 CFR 50,
                                                  in order to utilize an alternative                      be protected from failure during a PTS                Appendix G, and 10 CFR 50.61. The
                                                  methodology from that specified in                      event. Accordingly, the NRC has                       change does not adversely affect
                                                  portions of 10 CFR part 50, appendix G,                 concluded that using the procedures in                accident initiators or pre-cursors, nor
                                                  and 10 CFR 50.61, to allow the use of                   the ASME Code, Paragraph NB–2331 is                   alter the design assumptions,
                                                  fracture toughness test data for                        not necessary to achieve the underlying               conditions, or the manner in which the
                                                  evaluating the integrity of the ANO,                    purpose of 10 CFR 50.61(a)(5) and 10                  plant is operated and maintained. The
                                                  Unit 1 RPV beltline Linde 80 weld                       CFR part 50 appendix G.II.D(i).                       change does not alter or prevent the
                                                  materials. This exemption request is not                                                                      ability of structures, systems or
                                                                                                          Therefore, the special circumstances
                                                  related to, and does not impact, any                                                                          components from performing their
                                                                                                          required by 10 CFR 50.12(a)(2)(ii) for the
                                                  security issues at ANO, Unit 1.                                                                               intended function to mitigate the
                                                                                                          granting of an exemption exist.
                                                  Therefore, the NRC has determined that                                                                        consequences of an initiating event with
                                                  this exemption does not impact, and is                  F. Environmental Considerations                       the assumed acceptance limits. There
                                                  consistent with, the common defense                                                                           will be no adverse change to normal
                                                  and security.                                              The NRC staff determined that the                  plant operating parameters, engineered
                                                                                                          exemption discussed herein meets the                  safety feature actuation setpoints,
                                                  E. Special Circumstances                                eligibility criteria for the categorical              accident mitigation capabilities, or
                                                     Special circumstances, in accordance                 exclusion set forth in 10 CFR 51.                     accident analysis assumptions or inputs.
                                                  with 10 CFR 50.12(a)(2)(ii), are present                22(c)(9) because it is related to a                   The change does not affect the source
                                                  whenever application of the regulation                  requirement concerning the installation               term, containment isolation, or
                                                  in the particular circumstances would                   or use of a facility component located                radiological release assumptions used in
                                                  not serve the underlying purpose of the                 within the restricted area, as defined in             evaluating the radiological
                                                  rule or is not necessary to achieve the                 10 CFR part 20, and issuance of this                  consequences of an accident previously
                                                  underlying purpose of the rule. The                     exemption involves: (i) No significant                evaluated. Further, the change does not
                                                  underlying purpose of 10 CFR                            hazards consideration, (ii) no significant            increase the types of amounts of
                                                  50.61(a)(5) and 10 CFR part 50,                         change in the types or a significant                  radioactive effluent that may be released
                                                  appendix G.II.D(i) is to set forth fracture             increase in the amounts of any effluents              offsite, nor significantly increase
                                                  toughness requirements (e.g., initial                   that may be released offsite, and (iii) no            individual or cumulative occupational/
                                                  RTNDT values) for ferritic materials of                 significant increase in individual or                 public radiation exposures.
                                                  pressure-retaining components of the                    cumulative occupational radiation                        Therefore, the proposed exemption
                                                  reactor coolant pressure boundary of                    exposure. Therefore, in accordance with               does not involve a significant increase
                                                  light water nuclear power reactors, in                  10 CFR 51.22(b), no environmental                     in the probability or consequences of an
                                                  order to provide adequate margins of                    impact statement or environmental                     accident previously evaluated.
                                                  safety during any conditions of normal                  assessment need be prepared in                        2. Does the proposed exemption create
                                                  operation, including anticipated                        connection with the NRC’s                             the possibility of a new or different kind
                                                  operational occurrences and system                      consideration of this exemption request.              of accident from any accident
                                                  hydrostatic tests, to which the pressure                The basis for the NRC staff’s                         previously evaluated?
                                                  boundary may be subjected over its
                                                                                                          determination is discussed as follows
                                                  service lifetime. The underlying                                                                                Response: No.
                                                                                                          with an evaluation against each of the                  The exemption would allow the use
                                                  purpose of 10 CFR 50.61 is to establish
                                                                                                          requirements in 10 CFR 51. 22(c)(9)(i)–               of alternate methodologies from those
                                                  requirements for evaluating the fracture
                                                                                                          (iii).
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                                                  toughness of RPV materials to ensure                                                                          specified in appendix G to 10 CFR part
                                                  that a licensee’s RPV will be protected                 Requirements in 10 CFR 51.22(c)(9)(i)                 50, and 10 CFR 50.61, to allow the use
                                                  from failure during a PTS event.                                                                              of fracture toughness test data for
                                                     Entergy’s exemption request proposes                   The NRC evaluated whether the                       evaluating the integrity of RPV beltline
                                                  an alternate methodology to evaluate the                exemption involves no significant                     welds. Use of the alternate methodology
                                                  RTNDT of Linde 80 weld materials in the                 hazards consideration using the                       for determining the initial, unirradiated
                                                  RPV beltline region at ANO, Unit 1,                     standards described in 10 CFR 50.92(c),               material reference temperatures of the
                                                  based on fracture toughness test data                   as presented below:                                   Linde 80 weld materials present in the


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                                                  15638                         Federal Register / Vol. 80, No. 56 / Tuesday, March 24, 2015 / Notices

                                                  RPV beltline region will not result in                  there is no significant increase in                   licensee) dated March 20, 2014. This
                                                  changes in operation or configuration of                individual or cumulative public or                    exemption would permit the licensee to
                                                  the facility. The change does not impose                occupational radiation exposure.                      reduce its primary offsite liability
                                                  any new or different requirements or                      Therefore, the requirements of 10 CFR               insurance and withdraw from
                                                  eliminate any existing requirements.                    51.22(c)(9)(ii–iii) are met.                          participation in the secondary
                                                  The change is consistent with the                       Conclusion                                            retrospective rating pool for deferred
                                                  current safety analysis assumptions and                                                                       premium charges.
                                                  current plant operating practice. No new                  Based on the above, the NRC
                                                                                                                                                                DATES: March 24, 2015.
                                                  accident scenarios, transient precursors,               concludes that the proposed exemption
                                                                                                          meets the eligibility criteria for the                ADDRESSES: Please refer to Docket ID
                                                  failure mechanisms, or limiting single
                                                  failures are introduced as a result of the              categorical exclusion set forth in 10 CFR             NRC–2015–0068 when contacting the
                                                  proposed change. Equipment important                    51.22(c)(9). Therefore, in accordance                 NRC about the availability of
                                                  to safety will continue to operate as                   with 10 CFR 51.22(b), no environmental                information regarding this document.
                                                  designed. The change does not result in                 impact statement or environmental                     You may obtain publicly-available
                                                  any event previously deemed incredible                  assessment need be prepared in                        information related to this document
                                                  being more credible. The change does                    connection with the NRC’s issuance of                 using any of the following methods:
                                                  not result in any adverse conditions or                 this exemption.                                          • Federal Rulemaking Web site: Go to
                                                  result in any increase in the challenges                                                                      http://www.regulations.gov and search
                                                                                                          IV. Conclusions                                       for Docket ID NRC–2015–0068. Address
                                                  to safety systems.
                                                     Therefore, this change does not create                  Accordingly, the Commission has                    questions about NRC dockets to Carol
                                                  the possibility of a new or different kind              determined that, pursuant to 10 CFR                   Gallagher; telephone: 301–415–3463;
                                                  of accident from an accident previously                 50.12(a), the exemption is authorized by              email: Carol.Gallagher@nrc.gov. For
                                                  evaluated.                                              law, will not present an undue risk to                technical questions, contact the
                                                                                                          the public health and safety, and is                  individual listed in the FOR FURTHER
                                                  3. Does the proposed exemption involve                  consistent with the common defense                    INFORMATION CONTACT section of this
                                                  a significant reduction in a margin of                  and security. Also, special                           document.
                                                  safety?                                                 circumstances are present. Therefore,                    • NRC’s Agencywide Documents
                                                     Response: No.                                        the Commission hereby grants the                      Access and Management System
                                                     The proposed exemption does not                      licensee an exemption from 10 CFR part                (ADAMS): You may obtain publicly-
                                                  alter safety limits, limiting safety system             50, appendix G.II.D(i) and 10 CFR                     available documents online in the
                                                  settings, or limiting conditions for                    50.61(a)(5) requirements, in order to use             ADAMS Public Documents collection at
                                                  operation. The setpoints at which                       the alternate methodology specified in                http://www.nrc.gov/reading-rm/
                                                  protective actions are initiated are not                AREVA TR BAW–2308, Revisions 1–A                      adams.html. To begin the search, select
                                                  altered by the change. There are no new                 and 2–A, in lieu of the existing                      ‘‘ADAMS Public Documents’’ and then
                                                  or significant changes to initial                       requirement to use CV and drop weight-                select ‘‘Begin Web-based ADAMS
                                                  conditions contributing to accident                     based methodologies to evaluate the                   Search.’’ For problems with ADAMS,
                                                  severity or consequences. The                           initial (unirradiated) RTNDT of the Linde             please contact the NRC’s Public
                                                  exemption will not otherwise affect                     80 weld materials in the RPV beltline                 Document Room (PDR) reference staff at
                                                  plant protective boundaries, will not                   region at ANO, Unit 1.                                1–800–397–4209, 301–415–4737, or by
                                                  cause a release of fission products to the                 This exemption is effective upon                   email to pdr.resource@nrc.gov. The
                                                  public, nor will it degrade the                         issuance.                                             ADAMS accession number for each
                                                  performance of any other structures,                      Dated at Rockville, Maryland, this 16th day         document referenced (if it available in
                                                  systems or components important to                      of March 2015.                                        ADAMS) is provided the first time that
                                                  safety.                                                   For the Nuclear Regulatory Commission.              a document is referenced.
                                                     Therefore, the proposed exemption                    Michele G. Evans,                                        • NRC’s PDR: You may examine and
                                                  does not involve a significant reduction                Director, Division of Operating Reactor               purchase copies of public documents at
                                                  in a margin of safety.                                  Licensing, Office of Nuclear Reactor                  the NRC’s PDR, Room O1–F21, One
                                                     Based on the above evaluation of the                 Regulation.                                           White Flint North, 11555 Rockville
                                                  standards set forth in 10 CFR 50.92(c),                 [FR Doc. 2015–06700 Filed 3–23–15; 8:45 am]           Pike, Rockville, Maryland 20852.
                                                  the NRC concludes that the proposed
                                                                                                          BILLING CODE 7590–01–P                                FOR FURTHER INFORMATION CONTACT:
                                                  exemption involves no significant
                                                  hazards consideration. Accordingly, the                                                                       William Huffman, Office of Nuclear
                                                  requirements of 10 CFR 51.22(c)(9)(i) are                                                                     Reactor Regulation, U.S. Nuclear
                                                                                                          NUCLEAR REGULATORY                                    Regulatory Commission, Washington,
                                                  met.                                                    COMMISSION                                            DC 20555–0001; telephone: 301–415–
                                                  Requirements in 10 CFR 51.22(c)(9)(ii–                  [Docket No. 50–305; NRC–2015–0068]                    2046; email: William.Huffman@nrc.gov.
                                                  iii)                                                                                                          SUPPLEMENTARY INFORMATION:
                                                     The proposed exemption does not                      Dominion Energy Kewaunee, Inc.;
                                                                                                          Kewaunee Power Station                                I. Background
                                                  make any changes to the facility,
                                                  equipment at the facility, or to fuel or                AGENCY:  Nuclear Regulatory                              The Kewaunee Power Station (KPS)
                                                  core design. The proposed alternate                     Commission.                                           facility is a decommissioning power
mstockstill on DSK4VPTVN1PROD with NOTICES




                                                  methodology serves the same purpose as                  ACTION: Exemption; issuance.                          reactor located on approximately 900
                                                  the requirements set forth in 10 CFR                                                                          acres in Carlton (Kewaunee County),
                                                  50.61 and 10 CFR part 50, appendix G.                   SUMMARY:    The U.S. Nuclear Regulatory               Wisconsin, 27 miles southeast of Green
                                                  Therefore, the NRC concludes that the                   Commission (NRC) is issuing an                        Bay, Wisconsin. The licensee, DEK, is
                                                  exemption involves no significant                       exemption from certain power reactor                  the holder of the KPS Renewed Facility
                                                  change in the types or a significant                    liability insurance requirements in                   Operating License No. DPR–43. The
                                                  increase in the amounts of any effluents                response to a request from Dominion                   license provides, among other things,
                                                  that may be released offsite, and that                  Energy Kewaunee, Inc. (DEK or the                     that the facility is subject to all rules,


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Document Created: 2015-12-18 11:44:41
Document Modified: 2015-12-18 11:44:41
CategoryRegulatory Information
CollectionFederal Register
sudoc ClassAE 2.7:
GS 4.107:
AE 2.106:
PublisherOffice of the Federal Register, National Archives and Records Administration
SectionNotices
ActionExemption; issuance.
DatesMarch 24, 2015.
ContactAndrea George, Office of Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001; telephone: 301-415-1081, email: [email protected]
FR Citation80 FR 15634 

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