Document: NRC Regulatory Guide
Document ID: 5ec01b96-5209-446f-95b3-7342d73ba086
Document Type: regulatory_guide
Title: Design, Inspection, and Testing Criteria for Air Filtration and Adsorption Units of Post-Accident Engineered-Safety-Feature Atmosphere Cleanup Systems in Light-Water-Cooled Nuclear Power Plants + HISTORY - HISTORY 12/2011 – DG-1274 , Proposed Revision 4 10/2000 – DG-1102 , Proposed Revision 3 (Rev. 4)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1124/ML11244A045.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.52
CFR Part: 
CFR Title: 

Content:
nificantly to the reliability of the system by increasing the ease of such maintenance. A layout that provides accessibility and sufficient working space to safely and efficiently perform the required maintenance functions is of particular importance in the design. Periodic inspection and testing during operation of the components is another important means of ensuring reliability. It is important to perform periodic inspections and tests of the ESF atmosphere cleanup system in a manner that is consistent with the way the system was intended to operate during an accident. Built-in features that will facilitate convenient access for in-place testing are important in ESF system design. Standards acceptable to the NRC staff for the design and testing of ESF atmosphere cleanup systems include those portions of American Society of Mechanical Engineers (ASME) N509-2002 (reaffirmed 2008), “Nuclear Power Plant Air-Cleaning Units and Components” (Ref. 11); ASME N510-2007, “Testing of Nuclear Air-Treatment Systems” (Ref. 12); ASME AG-1-2009 (with 2010 and 2011 addenda), “Code on Nuclear Air and Gas Treatment” (Ref. 13); and ASME N511-2007, “In-Service Testing of Nuclear Air Treatment, Heating, Ventilating, and Air-Conditioning Systems” (Ref. 14), that are referenced in this guide, and American Society for Testing and Materials (ASTM) D3803-1991 (reapproved 2009), “Standard Test Methods for Nuclear-Grade Activated Carbon” (Ref. 15). The above standards reference several industry codes and standards. If a referenced standard has been incorporated separately into the NRC’s regulations, licensees and applicants must comply with that standard as set forth in the regulation. If the referenced standard has been endorsed in a regulatory guide, the standard constitutes a method acceptable to the NRC staff for meeting a regulatory requirement as described in that regulatory guide. If a referenced standard has been neither incorporated into the NRC’s DG-1274,