Document: NRC Regulatory Guide
Document ID: 8291b9eb-e4a7-4806-8b5b-1deca2ff1fe2
Document Type: regulatory_guide
Title: Control Room Habitability at Light-Water Nuclear Power Reactors
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0207/ML020790125.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.196
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CFR Title: 

Content:
ety Analysis Report GE General Electric GDC General Design Criteria LOCA Loss-of-Coolant Accident LOOP Loss of Offsite Power NEI Nuclear Energy Institute NRC Nuclear Regulatory Commission OL Operating License OMB Office of Management and Budget SCBA Self-Contained Breathing Apparatus SRP Standard Review Plan STS Standard Technical Specification TMI Three Mile Island TSC Technical Support Center UFSAR Updated Final Safety Analysis Report RA-1 REGULATORY ANALYSIS I. STATEMENT OF PROBLEM The NRC staff is proposing to develop and issue a new regulatory guide, “Control Room Habitability at Light Water-Nuclear Power Reactors,” that will endorse, with exceptions and clarifications, the Nuclear Energy Institute (NEI) report NEI 99-03, “Control Room Habitability Assessment Guidance,” which is dated June 2001 (Ref. RA-1). The staff proposes to issue a draft guide for public review and comment, and upon resolution of public comments, to finalize and implement the guide. The control room is that plant area in which actions are taken to operate the plant safely under normal conditions and to maintain the reactor in a safe condition during accident situations. The control room envelope (CRE) encompasses the control room and may encompass the alternate shutdown panel and other rooms and areas to which personnel access may be necessary to accomplish plant control functions in the event of an accident. The structures that make up the CRE are designed to limit the inleakage of radioactive and toxic materials from areas external to the CRE. Control room habitability systems (CRHSs) include the CRE. CRHSs typically provide the functions of shielding, isolation, pressurization, heating, ventilation, air conditioning and filtration, monitoring, and the necessary sustenance and sanitation to ensure that the control room operators can remain in the control room and take actions to operate the plant under normal and accident conditions. The personnel protection features incorporated