Cyber Security Programs for Nuclear Power Reactors

The U.S. Nuclear Regulatory Commission (NRC) is issuing for public comment Draft Regulatory Guide (DG) DG-5061, ``Cyber Security Programs for Nuclear Power Reactors.'' This revision incorporates lessons learned from operating experience since the original publication of the guide. Specifically, this revision clarifies issues identified from interim cybersecurity milestone inspections, additional insights gained through the Security Frequently Asked Questions (SFAQs) process, documented cybersecurity attacks, new technologies, and new regulations. This revision also considers the changes in the most recent revision to the National Institute of Standards and Technology (NIST) Special Publications (SP) 800-53, upon which Revision 0 of RG 5.71 was based.