Document: NUREG-0800
Document ID: 4b0fa4a0-ce32-4f59-9360-9426826a668c
Document Type: srp
Title: Rev. 4 — June 1997
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500496.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7
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Content:
TS) and engineered safety features actuation systems (ESFAS) to determine that these systems meet the NRC regulations. Although required by NRC regulations only for protection systems, the criteria of ANSI/IEEE Std 279 address considerations such as design bases, redundancy, independence, single failures, qualification, bypasses, status indication, and testing that may be used as review guidance, where appropriate, for any instrumentation and control (I&C) system, as elaborated in Sections 7.2 through 7.9. Therefore, for I&C systems not a part of the protection system, but having a high degree of importance to safety, the reviewer may use the concepts of ANSI/IEEE Std 279 as a starting point for the review of these systems. Applications involving digital computer-based safety systems should conform with the guidance of Reg. Guide 1.153, "Criteria for Power, Instrumentation, and Control Portions of Safety Systems," and be reviewed using Appendix 7.1-C. This appendix discusses the requirements of ANSI/IEEE Std 279 as they are used in the review of safety systems; however, it is not intended to be a stand-alone document. Each section of this appendix relates directly to one or more sections of the standard. Additional background or detailed information relevant to this review can be found in the references to this section. Rev. 4 — June 1997 SRP 7.1-B-2 An HICB review of safety systems that follows the guidance of ANSI/IEEE Std 279 should be coordinated with other branches as appropriate to address the following considerations: • Many of the auxiliary supporting features and other auxiliary features are described in Chapters 4, 5, 6, 8, 9, 10, and 12 of the safety analysis report (SAR). HICB reviewers must coordinate with the reviewers of these sections to ensure that auxiliary features are appropriately addressed by the review. • The site characteristics, systems (both physical and administrative), and analyses described in the other sections of the SAR may