Document: NUREG-0800
Document ID: 1d92e471-c01d-4c3b-8f23-e871a9de6e62
Document Type: srp
Title: describes the general procedures to be followed in reviewing any instrumentation and control
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500505.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.1
CFR Part: 
CFR Title: 

Content:
system. This part of section 7.4 highlights specific topics that should be emphasized in the review of safe shutdown systems. The review should include an evaluation of the safe shutdown systems design against the guidance of ANSI/IEEE Std 279, or Reg. Guide 1.153, "Criteria for Power, Instrumentation, and Control Portions of Safety Systems" (which endorses IEEE Std 603, "IEEE Standard Criteria for Safety Systems for Nuclear Power Generating Stations"), depending upon the applicant/licensee's commitment regarding these design criteria. This procedure is detailed in Appendix 7.1-B for ANSI/IEEE Std 279 and in Appendix 7.1-C for IEEE Std 603. The procedures in Appendices 7.1-B and 7.1-C address specific design requirements. Appendices 7.1-B and 7.1-C discuss ANSI/IEEE Std 279 and IEEE Std 603, respectively, and how they are used in the review of safe shutdown systems. Although the primary emphasis is on the equipment comprising the safe shutdown systems, the reviewer should consider the safe shutdown functions on a system level. The safe shutdown systems design should be compatible with the SAR Chapter 15 design bases accident analyses. It is not sufficient to evaluate the adequacy of the safe shutdown systems only on the basis of the design meeting the specific requirements of ANSI/IEEE Std 279 or IEEE Std 603. Major portions of the systems required for safe shutdown are also used as ESF systems, as discussed in SRP Section 7.3. Therefore, the review under this SRP section includes those aspects of ESF systems which are unique to safe shutdown, in addition to those systems required for safe shutdown which are not classified as ESF systems. The safe shutdown systems review should address the topics identified as applicable by Table 7-1. Appendix 7.1-A describes review methods for each topic. Major design considerations that should be emphasized in the review of I&C for the safe shutdown systems are identified below. Shutdown remote from the control room is not an