80 FR 24290 - Refining and Characterizing Heat Release Rates From Electrical Enclosures During Fire (RACHELLE-FIRE)
NUCLEAR REGULATORY COMMISSION Federal Register Volume 80, Issue 83 (April 30, 2015)
Federal Register Volume 80, Issue 83 (April 30, 2015)
| Page Range | 24290-24290 | |
| FR Document | 2015-10130 |
[Federal Register Volume 80, Number 83 (Thursday, April 30, 2015)] [Notices] [Page 24290] From the Federal Register Online [www.thefederalregister.org] [FR Doc No: 2015-10130] [[Page 24290]] ----------------------------------------------------------------------- NUCLEAR REGULATORY COMMISSION [NRC-2015-0059] Refining and Characterizing Heat Release Rates From Electrical Enclosures During Fire (RACHELLE-FIRE) AGENCY: Nuclear Regulatory Commission. ACTION: Draft NUREG; request for comment. ----------------------------------------------------------------------- SUMMARY: The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment a draft NUREG, NUREG-2178 (EPRI 3002005578), ``Refining and Characterizing Heat Release Rates from Electrical Enclosures During Fire (RACHELLE-FIRE), Volume 1: Peak Heat Release Rates and Effect of Obstructed Plume.'' DATES: Submit comments by June 15, 2015. Comments received after this date will be considered if it is practical to do so, but the Commission is able to ensure consideration only for comments received before this date. ADDRESSES: You may submit comments by any of the following methods (unless this document describes a different method for submitting comments on a specific subject):Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC-2015-0059. 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. Mail comments to: Cindy Bladey, Office of Administration, Mail Stop: OWFN-12-H08, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001. For additional direction on obtaining information and submitting comments, see ``Obtaining Information and Submitting Comments'' in the SUPPLEMENTARY INFORMATION section of this document. FOR FURTHER INFORMATION CONTACT: David Stroup, Office of Nuclear Regulatory Research; telephone: 301-251-7609; email: [email protected]; U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001. SUPPLEMENTARY INFORMATION: I. Obtaining Information and Submitting Comments A. Obtaining Information Please refer to Docket ID NRC-2015-0059 when contacting the NRC about the availability of information for this action. You may obtain publicly-available information related to this action by any of the following methods: Federal Rulemaking Web site: Go to http://www.regulations.gov and search for Docket ID NRC-2015-0059. 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 it is mentioned in the SUPPLEMENTARY INFORMATION section. Draft NUREG--2178, ``Refining and Characterizing Heat Release Rates from Electrical Enclosures During Fire (RACHELLE-FIRE), is available in ADAMS under Accession No. ML15056A144. 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. B. Submitting Comments Please include Docket ID NRC-2015-0059 in the subject line of your comment submission. The NRC cautions you not to include identifying or contact information that you do not want to be publically disclosed in your comment submission. The NRC will post all comment submissions at http://www.regulations.gov as well as enter the comment submissions into ADAMS. The NRC does not routinely edit comment submissions to remove identifying or contact information. If you are requesting or aggregating comments from other persons for submission to the NRC, then you should inform those persons not to include identifying or contact information that they do not want to be publicly disclosed in their comment submission. Your request should state that the NRC does not routinely edit comment submissions to remove such information before making the comment submissions available to the public or entering the comment into ADAMS. II. Discussion The Refining and Characterizing Heat Release Rates From Electrical Enclosures During Fire (RACHELLE-FIRE) program involves a working group of experienced fire protection and fire probabilistic risk assessment researchers and practitioners focused on enhancing the methodology used to model electrical enclosure fires in nuclear power plants. This report documents the results from the working group's efforts to develop technical information in three areas: (1) Classification of electrical enclosures in terms of function, size, contents, and ventilation; (2) determination of peak heat release rate (HRR) probability distributions considering specific electrical enclosure characteristics;, and (3) development of a method to account for the impact of the enclosure on the vertical thermal zone of influence above the enclosure during fire. Electrical enclosures have been classified in groups based on their electrical function, contents, and size. Peak HRR distributions for the different classification groups have been developed. These distributions are based on the results of different experimental programs intended to measure the HRR associated with fires in electrical enclosures. In order to provide a comprehensive characterization of electrical enclosure fires, the working group evaluated the temperature characteristics of fire plumes associated with these events using the Fire Dynamics Simulator program. Computer simulations of various enclosure configurations were developed for evaluating the fire burning inside electrical enclosures and the fire plume temperature characteristics that would be generated. Based on this research, new fire plume temperature profiles reflecting the obstructed nature of fire plumes generated from fires inside electrical enclosures are provided. Finally, examples, consolidating the information described in this report, are provided to illustrate how to incorporate the information documented in this report into existing approaches for modeling fires in electrical enclosures. Dated at Rockville, Maryland, this 21st day of April, 2015. For the Nuclear Regulatory Commission. Mark Henry Salley, Chief, Fire Research Branch, Division of Risk Analysis, Office of Nuclear Regulatory Research. [FR Doc. 2015-10130 Filed 4-29-15; 8:45 am] BILLING CODE 7590-01-P
![24290 Federal Register / Vol. 80, No. 83 / Thursday, April 30, 2015 / Notices
NUCLEAR REGULATORY the availability of information for this Enclosures During Fire (RACHELLE–
COMMISSION action. You may obtain publicly- FIRE) program involves a working group
available information related to this of experienced fire protection and fire
[NRC–2015–0059]
action by any of the following methods: probabilistic risk assessment researchers
Refining and Characterizing Heat • Federal Rulemaking Web site: Go to and practitioners focused on enhancing
Release Rates From Electrical http://www.regulations.gov and search the methodology used to model
Enclosures During Fire (RACHELLE– for Docket ID NRC–2015–0059. electrical enclosure fires in nuclear
• NRC’s Agencywide Documents power plants. This report documents
FIRE)
Access and Management System
the results from the working group’s
AGENCY: Nuclear Regulatory (ADAMS): You may obtain publicly-
efforts to develop technical information
Commission. available documents online in the
ADAMS Public Documents collection at in three areas: (1) Classification of
ACTION: Draft NUREG; request for
http://www.nrc.gov/reading-rm/ electrical enclosures in terms of
comment.
adams.html. To begin the search, select function, size, contents, and ventilation;
SUMMARY: The U.S. Nuclear Regulatory ‘‘ADAMS Public Documents’’ and then (2) determination of peak heat release
Commission (NRC) is issuing for public select ‘‘Begin Web-based ADAMS rate (HRR) probability distributions
comment a draft NUREG, NUREG–2178 Search.’’ For problems with ADAMS, considering specific electrical enclosure
(EPRI 3002005578), ‘‘Refining and please contact the NRC’s Public characteristics;, and (3) development of
Characterizing Heat Release Rates from Document Room (PDR) reference staff at a method to account for the impact of
Electrical Enclosures During Fire 1–800–397–4209, 301–415–4737, or by the enclosure on the vertical thermal
(RACHELLE–FIRE), Volume 1: Peak email to pdr.resource@nrc.gov. The zone of influence above the enclosure
Heat Release Rates and Effect of ADAMS accession number for each during fire. Electrical enclosures have
Obstructed Plume.’’ document referenced (if it is available in been classified in groups based on their
DATES: Submit comments by June 15, ADAMS) is provided the first time that electrical function, contents, and size.
2015. Comments received after this date it is mentioned in the SUPPLEMENTARY Peak HRR distributions for the different
will be considered if it is practical to do INFORMATION section. Draft NUREG— classification groups have been
so, but the Commission is able to ensure 2178, ‘‘Refining and Characterizing Heat developed. These distributions are
consideration only for comments Release Rates from Electrical Enclosures based on the results of different
received before this date. During Fire (RACHELLE–FIRE), is experimental programs intended to
ADDRESSES: You may submit comments available in ADAMS under Accession measure the HRR associated with fires
by any of the following methods (unless No. ML15056A144. in electrical enclosures. In order to
this document describes a different • NRC’s PDR: You may examine and provide a comprehensive
method for submitting comments on a purchase copies of public documents at
characterization of electrical enclosure
specific subject): the NRC’s PDR, Room O1–F21, One
fires, the working group evaluated the
• Federal Rulemaking Web site: Go to White Flint North, 11555 Rockville
Pike, Rockville, Maryland 20852. temperature characteristics of fire
http://www.regulations.gov and search
for Docket ID NRC–2015–0059. Address plumes associated with these events
B. Submitting Comments using the Fire Dynamics Simulator
questions about NRC dockets to Carol
Gallagher; telephone: 301–415–3463; Please include Docket ID NRC–2015– program. Computer simulations of
email: Carol.Gallagher@nrc.gov. For 0059 in the subject line of your various enclosure configurations were
technical questions, contact the comment submission. developed for evaluating the fire
individual listed in the FOR FURTHER The NRC cautions you not to include burning inside electrical enclosures and
INFORMATION CONTACT section of this identifying or contact information that the fire plume temperature
document. you do not want to be publically characteristics that would be generated.
• Mail comments to: Cindy Bladey, disclosed in your comment submission. Based on this research, new fire plume
Office of Administration, Mail Stop: The NRC will post all comment temperature profiles reflecting the
OWFN–12–H08, U.S. Nuclear submissions at http:// obstructed nature of fire plumes
Regulatory Commission, Washington, www.regulations.gov as well as enter the generated from fires inside electrical
DC 20555–0001. comment submissions into ADAMS. enclosures are provided. Finally,
For additional direction on obtaining The NRC does not routinely edit examples, consolidating the information
information and submitting comments, comment submissions to remove
described in this report, are provided to
see ‘‘Obtaining Information and identifying or contact information.
If you are requesting or aggregating illustrate how to incorporate the
Submitting Comments’’ in the information documented in this report
SUPPLEMENTARY INFORMATION section of comments from other persons for
submission to the NRC, then you should into existing approaches for modeling
this document.
inform those persons not to include fires in electrical enclosures.
FOR FURTHER INFORMATION CONTACT:
David Stroup, Office of Nuclear identifying or contact information that Dated at Rockville, Maryland, this 21st day
Regulatory Research; telephone: 301– they do not want to be publicly of April, 2015.
251–7609; email: David.Stroup@nrc.gov; disclosed in their comment submission. For the Nuclear Regulatory Commission.
U.S. Nuclear Regulatory Commission, Your request should state that the NRC Mark Henry Salley,
Washington, DC 20555–0001. does not routinely edit comment
Chief, Fire Research Branch, Division of Risk
mstockstill on DSK4VPTVN1PROD with NOTICES
submissions to remove such information
SUPPLEMENTARY INFORMATION: Analysis, Office of Nuclear Regulatory
before making the comment
Research.
I. Obtaining Information and submissions available to the public or
[FR Doc. 2015–10130 Filed 4–29–15; 8:45 am]
Submitting Comments entering the comment into ADAMS.
BILLING CODE 7590–01–P
A. Obtaining Information II. Discussion
Please refer to Docket ID NRC–2015– The Refining and Characterizing Heat
0059 when contacting the NRC about Release Rates From Electrical
VerDate Sep<11>2014 17:01 Apr 29, 2015 Jkt 235001 PO 00000 Frm 00061 Fmt 4703 Sfmt 9990 E:\FR\FM\30APN1.SGM 30APN1](https://thefederalregister.org/doc/80_FR_24373/page/1.svg)
Document Created: 2018-02-21 10:15:18
Document Modified: 2018-02-21 10:15:18
| Category | Regulatory Information | |
| Collection | Federal Register | |
| sudoc Class | AE 2.7: GS 4.107: AE 2.106: | |
| Publisher | Office of the Federal Register, National Archives and Records Administration | |
| Section | Notices | |
| Action | Draft NUREG; request for comment. | |
| Dates | Submit comments by June 15, 2015. Comments received after this date will be considered if it is practical to do so, but the Commission is able to ensure consideration only for comments received before this date. | |
| Contact | David Stroup, Office of Nuclear Regulatory Research; telephone: 301-251-7609; email: [email protected]; U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001. | |
| FR Citation | 80 FR 24290 |
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