Document: NUREG-0800
Document ID: 18405759-3ae6-4408-b6ab-7b3ca11fcd9f
Document Type: srp
Title: SAFE SHUTDOWN SYSTEMS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0705/ML070550085.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.4
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for the review of instrumentation and controls Secondary - None I. AREAS OF REVIEW The objectives of the review are to confirm that the safe shutdown systems satisfy the requirements of the acceptance criteria and guidelines applicable to safety systems and that they will perform their safety functions during all plant conditions for which they are required. This Standard Review Plan (SRP) section describes the review process and acceptance criteria for those instrumentation and control (I&C) systems used to achieve and maintain a safe shutdown condition of the plant as required by 10 CFR 50 Appendix A, General Design Criteria (GDC) 13, “Instrumentation and Control,” and GDC 19, “Control Room.” To the extent that the engineered safety feature (ESF) systems are used to achieve and maintain safe shutdown, the review of these systems in this section is limited to those features that are unique to safe shutdown and not directly related to accident mitigation. The features within the scope of SRP Section 7.4 may involve individual component control for safe shutdown versus system-level actuation for accident mitigation, or system-level controls used to achieve and maintain safe shutdown but not used for accident mitigation. System-level controls used for accident 7.4-2 Revision 5 - March 2007 mitigation may also need to be reviewed using SRP Section 7.4 if the safe shutdown functions of these controls involve features or operating modes that are unique to their safe shutdown functions. This SRP section also addresses the review of those systems required for safe shutdown that are not classified as ESF systems. The specific arrangement of these systems depends on (1) the type of plant (PWR or BWR), (2) individual plant design features, and (3) the conditions under which the safe shutdown has to be achieved and maintained. The functional performance requirements of safe shutdown systems and auxiliary