Document: NRC Regulatory Guide
Document ID: 8e45dce1-e1e7-4415-b1dd-7e2a610e545b
Document Type: regulatory_guide
Title: Fire Protection for Nuclear Power Plants (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2023/ML20231A835.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.189
CFR Part: 
CFR Title: 

Content:
precedence over the international guidance. DG-1359, Page 12 neither been incorporated by reference into NRC regulations nor endorsed in a RG, then the secondary reference is neither a legally binding requirement nor a “generic” NRC-approved acceptable approach for meeting an NRC requirement. However, licensees and applicants may consider and use the information in the secondary reference, if appropriately justified, consistent with current regulatory practice, and consistent with applicable NRC requirements. DG-1359, Page 13 C. STAFF REGULATORY GUIDANCE This RG endorses certain sections of NEI 00-01, “Guidance for Post-Fire Safe Shutdown Circuit Analysis,” Revision 4. These endorsements do not imply the NRC’s endorsement of the references cited in the endorsed sections of NEI 00-01, Revision 4, or to references in the endorsed sections of NEI 00-01 to other (unendorsed) sections of NEI 00-01, Revision 4. Further, examples in NEI 00-01, Revision 4, are for illustrative purposes and are not endorsed specifically. Code of Record When existing plants were originally licensed, the licensees generally committed to complying with a specific edition of applicable industry codes and standards, such as the NFPA fire codes. The specific edition to which a licensee originally committed is still the “code of record.” Licensees are not required to comply with later editions of these codes and standards, except when they specifically adopt a later edition in accordance with regulatory guidelines or install new fire protection systems protecting SSCs important to safety. The code of record for the new fire protection system should be the edition that is in effect when the system is designed or when a commitment to add the system is made to the staff. The code of record for the unchanged fire protection systems will not change. For modifications to an existing fire protection system that are permitted by the code of record, the staff does not require that the system