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:
ed by the design criteria proposed for the intermediate coolant boundary (SFR-DC 75, SFR-DC 76, and SFR-DC 77). Examples of intermediate coolant system accidents would include: rupture (including at a location in the steam-sodium generator), loss of flow, overcooling conditions, and undercooling conditions. APPENDIX B. SODIUM-COOLED FAST REACTOR DESIGN CRITERIA Appendix B to DG-1330, Page B-30 VII. Additional SFR-DC Criterion SFR-DC Title and Content NRC Rationale for Adaption to GDC 71 Primary coolant & cover gas purity control. Systems shall be provided as necessary to maintain the purity of primary coolant sodium and cover gas within specified design limits. These limits shall be based on consideration of (1) chemical attack, (2) fouling and plugging of passages, and (3) radionuclide concentrations, and (4) air or moisture ingress as a result of a leak of cover gas. The NRC considered DOE’s proposed SFR-DC 71 and made changes based on the “Response to NRC Staff Questions on the U.S. Department of Energy Report, ‘Guidance for Developing Principal Design Criteria for Advanced Non-Light Water Reactors’” (pages 12-13). NUREG 1368 (Ref. 4) (page 3-57), Section 3.2.4.6, suggested the need for a separate criterion for a sodium and cover gas purity control. Also a separate criterion was included in NUREG-0968 (Ref. 5) (Criterion 34, “Reactor and Intermediate Coolant and Cover Gas Purity Control”). 72 Sodium heating systems. Heating systems shall be provided for systems and components important to safety, which contain or could be required to contain sodium. These heating systems and their controls shall be appropriately designed to ensure that the temperature distribution and rate of change of temperature in systems and components containing sodium are maintained within design limits assuming a single failure. If plugging of any cover gas line due to condensation or plate out of sodium aerosol or vapor could prevent accomplishing a safety function, the