Document: NRC Regulatory Guide
Document ID: bcbe26a0-004f-4616-b7f4-b32b2bfe4909
Document Type: regulatory_guide
Title: Setpoints for Safety-Related Instrumentation (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2005/ML20055G823.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.105
CFR Part: 
CFR Title: 

Content:
for licensees to justify an increase in calibration surveillance intervals using as-found and as-left calibration data from past calibration surveillances. • Regulatory Issue Summary (RIS) 2006-017, “NRC Staff Position on the Requirements of 10 CFR 50.36, ‘Technical Specifications,’ regarding Limiting Safety System Settings during Periodic Testing and Calibration of Instrument Channels,” dated August 24, 2006 (Ref. 9) provides regulatory clarification on NRC staff positions in terms of the appropriate determination of technical specification-related instrument channel operability. The RIS clarifies staff positions about the appropriate establishment of as-found and as-left acceptance tolerances. • Technical Specification Task Force (TSTF) Traveler TSTF-493, Revision 4, “Clarify Application of Setpoint Methodology for LSSS Functions,” dated May 11, 2010 (Ref. 10) provides guidance about the maintenance of instrument setpoints during periodic surveillances. 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. Regulatory guides 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 for the findings required for the issuance or continuance of a permit or license by the Commission. Paperwork Reduction Act This RG provides voluntary guidance for implementing the mandatory information collections in 10 CFR Parts 50 and 52 that are subject to the Paperwork Reduction Act of 1995 (44 U.S.C. 3501 et. seq.). These information collections were approved by the Office of Management and Budget (OMB), approval numbers 3150-0011 and 3150-0151. Send comments regarding