Document: NRC Regulatory Guide
Document ID: acab976c-e936-49be-8c59-865767973599
Document Type: regulatory_guide
Title: Guidance for a Technology-Inclusive Content of Application Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light-Water Reactors (Rev. 1)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2319/ML23194A194.pdf
Revision Date: 2023-09
Chapter: 
Section ID: RG-1.253
CFR Part: 
CFR Title: 

Content:
r Beyond-Design-Basis Events” (Ref. 31), identifies methods and procedures the NRC staff considers acceptable for nuclear power reactor applicants and licensees to use to demonstrate compliance with NRC regulations on planning and preparedness for BDBEs as required by 10 CFR 50.155. RG 1.226 endorses, with clarifications, the methods and procedures in NEI 12-06, Revision 4, “Diverse and Flexible Coping Strategies (FLEX) Implementation Guide,” issued December 2016 (Ref. 32), as a process the NRC considers acceptable for meeting, in part, the regulations in 10 CFR 50.155. Additionally, RG 1.226 provides guidance for meeting the regulations in 10 CFR 50.155 in areas not covered by NEI 12-06, Revision 4. • RG 1.227, “Wide-Range Spent Fuel Pool Level Instrumentation” (Ref. 33), identifies methods and procedures the NRC staff considers acceptable for demonstrating compliance with NRC regulations on providing a reliable means to remotely monitor wide-range spent fuel pool levels to support implementation of event mitigation and recovery actions as required by 10 CFR 50.155. RG 1.227 endorses, with exceptions and clarifications, the methods and procedures in NEI 12-02, Revision 1, “Industry Guidance for Compliance with NRC Order EA-12-051, ‘To Modify Licenses with Regard to Reliable Spent Fuel Pool Instrumentation,’” issued August 2012 (Ref. 34), as a process the NRC staff considers acceptable for meeting certain regulations in 10 CFR 50.155. • As noted in the statements of consideration for 10 CFR 50.155 (84 FR 39684) (Ref. 35), in recognition of the similarity of the existing extensive damage mitigation guidelines (EDMGs) formerly in 10 CFR 50.54(hh)(2) to the strategies required by 10 CFR 50.155(b)(1), the NRC relocated the EDMGs into the MBDBE rule as 10 CFR 50.155(b)(2). The EDMGs provide strategies and guidelines to maintain or restore core cooling, containment, and spent fuel pool cooling capabilities under the circumstances associated with loss