Document: NRC Regulatory Guide
Document ID: f92b5e1e-0bb1-4850-acb7-d4534cc77577
Document Type: regulatory_guide
Title: Wide-Range Spent Fuel Pool Level Instrumentation + HISTORY - HISTORY 11/2015 – DG-1317 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1424/ML14245A454.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.227
CFR Part: 
CFR Title: 

Content:
nd-design-basis events. • General Design Criterion 4, “Environmental and Dynamic Effects Design Bases,” of Appendix A, "General Design Criteria for Nuclear Power Plants," to Part 50, “Domestic Licensing of Production and Utilization Facilities,” of Title 10 of the Code of Federal Regulations (10 CFR Part 50), requires that structures, systems, and components important to safety must be designed to accommodate the effects of environmental conditions [i.e., remain functional under postulated design-basis events (DBEs)]. General Design Criteria 1, 2, 4, and 23 of Appendix A, to 10 CFR Part 50 contain additional general requirements. • 10 CFR 50.54(hh)(2) requires each licensee to develop and implement guidance and strategies intended to maintain or restore core cooling, containment, and SFP cooling capabilities under the circumstances associated with loss of large areas of the plant due to explosions or fire. • 10 CFR 50.63, “Loss of All Alternating Current Power,” requires all power reactor licensees to be able to withstand and recover from a station blackout of specific duration. • 10 CFR 50.155(b)(1), “Mitigation of Beyond-Design-Basis Events,” requires nuclear power reactor licensees to develop, implement, and maintain strategies to maintain or restore core cooling, SFP cooling, and containment following a beyond-design-basis external event. Related Guidance • JLD-ISG-2012-01, “Compliance with Order EA-12-049, Order Modifying Licenses with Regard to Requirements for Mitigation Strategies for Beyond-Design-Basis External Events,” (Ref. 5). This interim staff guidance (ISG) endorses, with exceptions and clarifications, the methodologies described in NEI guidance document NEI 12-06, “Diverse and Flexible Coping Strategies (FLEX) Implementation Guide” (Ref. 6) as one method of demonstrating compliance with NRC Order EA-12-049. Draft regulatory guide (DG)-1301 (proposed RG 1.226), “Flexible Mitigation Strategies for