Document: NUREG-0800
Document ID: a59a01e7-d1e2-4946-bebf-a5fff5731c47
Document Type: srp
Title: of the SAR.
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500493.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.3
CFR Part: 
CFR Title: 

Content:
j. Criterion 24 — Separation of Protection and Control Systems "The protection system shall be separated from control systems to the extent that failure of any single control system component, or channel, or failure or removal from service of any single protection system component or channel which is common to the control and protection systems leaves intact a system satisfying all reliability, redundancy, and independence requirements of the protection system. Interconnection of the protection and control systems shall be limited so as to assure that safety is not significantly impaired." Applicability — All I&C systems. Review Methods — Review of compliance with GDC 24 should address the following characteristics described in ANSI/IEEE Std 279 and IEEE Std 603. SRP Appendix 7.1-B and Appendix 7.1-C discuss methods for review of these characteristics. Location of Review Guidance Topic Appendix 7.1-B Item Appendix 7.1-C Item Single-failure criterion 3 6 Independence 7 11 Location of Review Guidance Topic Appendix 7.1-B Item Appendix 7.1-C Item Rev. 4 — June 1997 SRP 7.1-A-19 Control–protection interaction 8 24 Auxiliary features 6 17 Power sources 6 31 Separation of protection and control systems should be considered in the review of all sections of Chapter 7 of the SAR to confirm that all interfaces between control systems and protection systems have been properly identified and addressed. k. Criterion 25 — Protection System Requirements for Reactivity Control Malfunctions "The protection system shall be designed to assure that specified acceptable fuel design limits are not exceeded for any single malfunction of the reactivity control systems, such as accidental withdrawal (not ejection or dropout) of control rods." Applicability — The reactor trip system. Also reactivity control system interlocks identified in Chapter 15 as required to ensure that specified acceptable fuel design limits are not exceeded for any single malfunction of the reactivity