Document: NRC Regulatory Guide
Document ID: 4be414ec-2258-461b-b93f-e2ed0e307dd2
Document Type: regulatory_guide
Title: Demonstrating Control Room Envelope Integrity at Nuclear Power Reactors
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1511/ML15117A117.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.197
CFR Part: 
CFR Title: 

Content:
ivision of Policy and Rulemaking Office of Nuclear Reactor Regulation SUBJECT: RESULTS OF PERIODIC REVIEW OF REGULATORY GUIDE 1.197 This memorandum documents the US Nuclear Regulatory Commission (NRC) periodic review of Regulatory Guide (RG) 1.197, “Demonstrating Control Room Envelope Integrity at Nuclear Power Reactors,” published in May 2003. The RG provides an approach acceptable to the NRC staff for measuring inleakage into the control room and associated rooms and areas at nuclear power reactors. The amount of inleakage is an input to the design of the control room, and periodic verification of the inleakage provides assurance that the control room will be habitable during normal and accident conditions. This guide provides guidance on methods acceptable to the staff for determining control room envelope integrity for the purpose of confirming that the reactor meets General Design Criterion-19. As discussed in Management Directive 6.6, “Regulatory Guides,” the NRC staff reviews RGs approximately every five years to ensure that the RGs continue to provide useful guidance. The documentation of the Office of Nuclear Reactor Regulation (NRR) staff review is enclosed. Based on the results of the periodic review, the NRR staff concludes that no changes to RG 1.197 are warranted. The NRR staff did not identify any technical or regulatory issues in the review. Enclosure: Regulatory Guide Periodic Review CONTACT: Leslie Perkins, NRR/DPR (301) 415-2375 DISTRIBUTION: PUBLIC RidsNrrDpr MGavrilas AMendiola BThomas TBoyce LPerkins RDennig NKaripineni RJervey PLPB R/F RidsNrrDprPlpb RidsNrrLADHarrison ADAMS Accession No.: ML15117A117 NRR-106 OFFICE NRR/DPR/PLPB NRR/DPR/PLPB NRR/DSS/SCVB NRR/DPR/PLPB NRR/DPR NRR/DPR NAME LPerkins DHarrison RDennig AMendiola (JGolla for) MGavrilas LKokajko DATE 4/ 28 /2015 4/30/2015 4/2/2015 5/1/2015 5/1/2015 5/6/2015 OFFICIAL RECORD COPY ENCLOSURE Regulatory Guide Periodic Review Regulatory Guide Number: 1.197 Revision number: 0 Title: