Document: NRC Regulatory Guide
Document ID: dff52070-b179-4367-bf66-5d1107c54315
Document Type: regulatory_guide
Title: Design, Inspection, and Testing Criteria for Air Filtration and Adsorption Units of Normal Atmosphere Cleanup Systems in Light-Water-Cooled Nuclear Power Plants + HISTORY – HISTORY 06/2012 – DG-1280 , Proposed Revision 3 10/2000 – DG-1103 , Proposed Revision 2 (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML1127/ML11273A057.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.140
CFR Part: 
CFR Title: 

Content:
BWRs). The ASME Committee on Nuclear Air and Gas Treatment (CONAGT) has indicated their intention for future editions of the ASME AG-1 code to detail requirements for power cycle waste offgas systems. Staff positions now include power cycle waste offgas systems in anticipation that future revisions of this guide will address the ASME AG-1 code. C. STAFF REGULATORY GUIDANCE 1. General Design and Testing Criteria ASME AG-1-2009, including 2010 Addenda 1a and 2011 Addenda 1b (i.e., ASME AG-1b-2009), and ASME N511-2007, “Inservice Testing of Nuclear Air Treatment, Heating, Ventilating, and Air-Conditioning Systems” (Ref. 7), provide guidance that is acceptable to the NRC staff for the design, construction, acceptance testing, quality assurance, and inservice testing of normal atmosphere cleanup systems and components. Normal atmosphere cleanup systems designed to ASME N509-2002 (Reaffirmed 2008), “Nuclear Power Plant Air Cleaning Units and Components” (Ref. 8) (or DG-1280, Page 4 its earlier versions), and tested to ASME N510-2007, “Testing of Nuclear Air-Treatment Systems” (Ref. 9) (or its earlier versions), are also considered adequate to protect public health and safety. 2. Environmental Design Criteria a. Design of normal atmosphere cleanup systems should be based on the anticipated range of operating parameters of temperature, pressure, relative humidity, and radiation levels during normal plant operations, including anticipated operational occurrences. b. Normal atmosphere cleanup system operation should not degrade the operation or capability of any safety system required to operate after a design-basis accident. c. Design of normal atmosphere cleanup systems should consider any reasonably expected significant contaminants, such as chemicals, dusts, or other particulate matter that could degrade the systems operation or capability. d. For power cycle waste offgas systems relying on activated carbon delay tanks or beds, the above environmental design