Document: NUREG-0800
Document ID: d2f0cc81-920c-4065-b74b-67114ba68b0e
Document Type: srp
Title: through 7.9 of the SAR. Where exceptions are taken to the guidance provided by regulatory guides, and
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0525/ML052500493.pdf
Revision Date: 2023-06
Chapter: 7
Section ID: 7.2
CFR Part: 
CFR Title: 

Content:
52 a. 50.55a(a)(1) Quality Standards for Systems Important to Safety "Structures, systems, and components must be designed, fabricated, erected, constructed, tested, and inspected to quality standards commensurate with the importance of the safety function to be performed." Applicability — All I&C systems Review Methods — The licensee should commit to conformance with the regulatory guides and standards referenced in Sections 7.1 through 7.9 and Chapter 7 Appendix A. The design should conform with all regulatory guides and standards committed to by the applicant/licensee. b. 50.55a(h) (ANSI/IEEE Std 279) Applicability — The protection systems: reactor trip system (RTS), engineered safety features actuation system (ESFAS), and supporting data communication systems. One part of ANSI/IEEE Std 279, section 4.7.2, “Isolation Devices,” applies to all I&C systems. Section 4.13, “Indication of Bypasses,” also applies to information systems important to safety. Review Methods — Appendix 7.1-B provides guidance for evaluating conformance to the requirements of ANSI/IEEE Std 279, including the applicable regulatory guides. NRC staff will use the criteria of 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," in the evaluation of the design, reliability, qualification and testability of the power instrumentation control portions of safety related systems. Appendix 7.1-C provides guidance for evaluating conformance to the guidance of Reg. Guide 1.153. c. 50.34(f)(2)(v) [TMI Action Plan Item I.D.3] Bypass and Inoperable Status Indication "Provide for automatic indication of the bypassed and operable status of safety systems." Applicability — The protection systems, RTS, ESFAS, information systems important to safety, interlock systems, and supporting data communication systems. Rev. 4 — June 1997 SRP