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:
utral. 26 Reactivity control systems. Same as ARDC Reactivity control systems shall include the following capabilities: (1) A means of shutting down the reactor shall be provided to ensure that, under conditions of normal operation, including Recent licensing activity associated with the application of GDC 26 and GDC 27 to new reactor designs “Response to Gap Analysis Summary Report for Reactor System Issues,” (Ref. 26) and “Response to NuScale Gap Analysis Summary Report for Reactivity Control Systems, Addressing Gap 11, General Design Criteria 26,” (Ref. 27), revealed that additional clarity could be provided in the area of reactivity control requirements. ARDC 26 APPENDIX B. SODIUM-COOLED FAST REACTOR DESIGN CRITERIA Appendix B to DG-1330, Page B-10 III. Reactivity Control Criterion SFR-DC Title and Content NRC Rationale for Adaption to GDC anticipated operational occurrences, and with appropriate margin for malfunctions, design limits for fission product barriers are not exceeded. (2) A means of shutting down the reactor and maintaining a safe shutdown under design-basis event conditions, with appropriate margin for malfunctions, shall be provided. A second means of reactivity control shall be provided that is independent, diverse, and capable of achieving and maintaining safe shutdown under design-basis event conditions. (3) A system for holding the reactor subcritical under cold conditions shall be provided. combines the scope of GDC 26 and GDC 27. The development of ARDC 26 is informed by the proposed General Design Criteria of 1965, AEC-R 2/49 and November 5, 1967 (32 FR 10216) (Ref. 28); the current GDC 26 and 27; the definition of safety-related SSC in 10 CFR 50.2; and SECY-94-084, “Policy and Technical Issues Associated with the Regulatory Treatment of Non-Safety Systems in Passive Plant Designs” (Ref. 29); and the prior application of reactivity control requirements. Current GDC 26, first sentence, states that two reactivity control systems