Document: NRC Regulatory Guide
Document ID: 9c99a4b7-8619-41f0-b716-262bfdb03941
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:
modes. Same as GDC 24 Separation of protection and control systems. Same as GDC 25 Protection system requirements for reactivity control malfunctions. The protection system shall be designed to ensure that specified acceptable fuel design limits are not exceeded during any anticipated operational occurrence accounting for a single malfunction of the reactivity control systems. Text has been added to clarify that the protection system is designed to protect the specified acceptable fuel design limits for anticipated operational occurrences (AOOs) in combination with a single failure; the protection system does not have to protect the specified acceptable fuel design limits during a postulated accident in combination with a single failure. The example was deleted to make the ARDC technology neutral. 26 Reactivity control systems. 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 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 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 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