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
CFR Part: 
CFR Title: 

Content:
dsorption Units of Normal Atmosphere Cleanup Systems in Light-Water-Cooled Nuclear Power Plants" (Ref. 16). ASHRAE Guideline 1-1996 (Ref. 17) may be used to establish a maintenance program for systems that handle hazardous chemical and fire challenges. 2.7.2 Configuration Control and Training Configuration control and training are effective tools that can minimize the impact that changes to CRHSs can have on CRH. Section 9.4 of NEI 99-03 (Ref. 2) provides configuration controls that include CRE boundary and breach control, procedure control, toxic gas control, design change, and safety analysis controls. The staff endorses the controls discussed in Sections 9.4.1 through 9.4.5 of NEI 99-03 with one exception. The staff does not endorse Appendix K, "Control Room Envelope Boundary Control Program," referenced in Section 9.4.1, "CRE Boundary/Breach Control.” An acceptable method of breach control is contained in Westinghouse STS 3.7.10 (Ref. 11), B&W STS 3.7.10 (Ref. 12), CE STS 3.7.11 (Ref. 13), GE BWR 4 STS 3.7.4 (Ref. 14), and GE BWR 6 STS 3.7.3 (Ref. 15) and their associated bases. This acceptable breach control method is incorporated in the example provided in Appendix A. Furthermore, the staff endorses Section 9.5, "Training," of NEI 99-03 with one exception. Section 9.5 recommends training using NEI 99-03. Instead, the NRC staff endorses training using only the sections of NEI 99-03 that the staff has endorsed. 2.7.3 Degraded and Nonconforming Conditions Methods available to address short term degraded or nonconforming conditions are provided in Section 8.4, "Methods Available to Address Degraded or Nonconforming Conditions" of NEI 99-03 (Ref. 2). Section 8.4 includes guidance on compensatory measures such as self-contained breathing apparatus (SCUBA) and potassium iodide (KI) tablets. These methods are acceptable with the following exceptions. Appendices C and D are not endorsed, instead, guidance is being developed in Draft Regulatory Guides DG-1111,