Document: NUREG-0800
Document ID: d3619a55-efe4-419a-9ccd-6a1d63928d7c
Document Type: srp
Title: REACTOR TRIP SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550083.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.2
CFR Part: 
CFR Title: 

Content:
wed in reviewing any instrumentation and control system. This part of SRP Section 7.2 highlights specific topics that should be emphasized in the RTS review. 1. The review should include an evaluation of the RTS design against the requirements of IEEE Std 603-1991 or IEEE Std 279-1971, depending upon the applicant/licensee’s commitment regarding design criteria. For computer-based RTSs, guidance is provided by IEEE Std 7-4.3.2-2003 as endorsed by Regulatory Guide 1.152, Revision 2. These procedures are detailed in SRP Appendix 7.1-B for IEEE Std 279-1971, SRP Appendix 7.1-C for IEEE Std 603-1991, and SRP Appendix 7.1-D for IEEE Std 7-4.3.2-2003. SRP Appendices 7.1-B and 7.1-C discuss the requirements of IEEE Std 279-1971 and IEEE Std 603-1991 and how the requirements are used in the review of the RTS. SRP Appendix 7.1-D discusses the criteria of IEEE Std 7-4.3.2-2003 and how the criteria are used in the review of the RTS. Although the primary emphasis is on the equipment comprising the RTS, the reviewer must consider the overall protective functions at the system level. The RTS design should be compatible with the accident analysis. It is not sufficient to evaluate the adequacy of the RTS only on the basis that the design meets the specific requirements of IEEE Std 279-1971 or IEEE Std 603-1991. The RTS review should address all topics identified as applicable in SRP Table 7-1. SRP Appendix 7.1-A describes review methods for each topic. Major design considerations that should be emphasized in the RTS review are identified below. A. Design basis - See SRP Appendix 7.1-B subsection 3 or SRP Appendix 7.1-C subsection 4. B. Single-failure criterion - See SRP Appendix 7.1-B subsection 4.2 or SRP Appendix 7.1-C subsection 5.1. C. Quality of components and modules - See SRP Appendix 7.1-B subsection 4.3 or SRP Appendix 7.1-C subsection 5.3. D. Independence - See SRP Appendix 7.1-B subsections 4.6 and 4.7 or SRP Appendix 7.1-C subsections 5.6 and 6.3. E. Diversity and