Document: NRC Regulatory Guide
Document ID: c361be32-682d-4496-bb9f-6e52a80b0bd9
Document Type: regulatory_guide
Title: Instrument Sensing Lines + HISTORY –HISTORY 01/2019 – DG-1352 , Proposed Revision 2 09/2016 – Periodic Review of Revision 1 – Revise 12/2008 – DG-1178 , Proposed Revision 1 Draft IC 126-5, Proposed Revision 0, published 03/1982 (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1815/ML18158A303.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.151
CFR Part: 
CFR Title: 

Content:
ar Power Plant Protection Systems" (Ref. 4) or the requirements in IEEE Std 279–1971, "Criteria for Protection Systems for Nuclear Power Generating Stations" (Ref. 5) or the requirements in IEEE Std 603–1991, "Criteria for Safety Systems for Nuclear Power Generating Stations,” and the correction sheet dated January 30, 1995 (Ref. 6). For nuclear power plants with construction permits issued before January 1, 1971, protection systems must be consistent with their licensing basis or may meet the requirements of IEEE Std. 603–1991 and the correction sheet dated January 30, 1995. o 10 CFR 50.55a(h)(3) addresses safety systems, and requires that applications filed on or after May 13, 1999, for construction permits and operating licenses under 10 CFR Part 50, and for design approvals, design certifications, and combined licenses under 10 CFR Part 52, must meet the requirements for safety systems in IEEE Std. 603–1991 and the correction sheet dated January 30, 1995. Related Guidance • RG 1.53, “Application of the Single-Failure Criterion to Nuclear Power Plant Protection Systems” (Ref. 7), states that IEEE Std. 379-2000, “IEEE Standard Application of the Single-Failure Criterion to Nuclear Power Generating Station Safety Systems” (Ref. 8), is an acceptable method to meet the regulations concerning the application of the single-failure criterion to the electrical power, instrumentation, and control portions of nuclear power plant safety systems. Purpose of Regulatory Guides The NRC issues RGs to describe to the public methods that the staff considers acceptable for use in implementing specific parts of the agency’s regulations, to explain techniques that the staff uses in evaluating specific problems or postulated events, and to provide guidance to applicants. RGs are not substitutes for regulations and compliance with them is not required. Methods and solutions that differ from those set forth in RGs will be deemed acceptable if they provide a basis