Document: NRC Regulatory Guide
Document ID: da269da5-7390-4252-b08f-bdb7aeb8beaf
Document Type: regulatory_guide
Title: Developing Principal Design Criteria for Non-Light Water Reactors + HISTORY - HISTORY 02/2017 – DG-1330 , Proposed Revision 0
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1630/ML16301A307.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.232
CFR Part: 
CFR Title: 

Content:
ble interconnections leak detection, and isolation capabilities, shall In most advanced reactor designs the residual heat removal system is designed to meet the requirements of SFR-DC 34 and SFR-DC 35 (for more discussion see NUREG-0968 (Ref. 5) and NUREG- 1368 (Ref. 4)). It is anticipated that the RHR system for non-LWRs will have the same regulatory treatment as the current LWR fleet. “Reactor coolant pressure boundary” has been relabeled as “primary coolant boundary” to reflect that the SFR primary system operates at low-pressure and to conform to standard terms used in APPENDIX B. SODIUM-COOLED FAST REACTOR DESIGN CRITERIA Appendix B to DG-1330, Page B-16 IV. Fluid Systems Criterion SFR-DC Title and Content NRC Rationale for Adaption to GDC be provided to ensure that the system safety function can be accomplished, assuming a single failure. the LMR industry. The use of the term “primary” indicates that the SFR-DC are applicable to the primary cooling system, not the intermediate cooling system. The second paragraph addresses residual heat removal system redundancy. The discussion related to sodium leakage and required barriers was moved to a new SFR-DC 78. The GDC reference to electric power was removed. Refer to SFR- DC17 concerning those systems that require electric power. 35 Emergency core cooling. Same as ARDC A system to provide sufficient emergency core cooling shall be provided. The system safety function shall be to transfer heat from the reactor core such that effective core cooling is maintained and fuel damage is limited. Suitable redundancy in components and features and suitable interconnections, leak detection, isolation, and containment capabilities shall be provided to ensure that the system safety function can be accomplished, assuming a single failure. In most advanced reactor designs, a single system (i.e the residual heat removal system) is provided to perform both the residual heat removal and emergency core cooling functions.