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:
itutes 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, Page 6 regulations nor endorsed in a regulatory guide, licensees and applicants may consider and use the information in the referenced standard if appropriately justified, consistent with current regulatory practice. The International Atomic Energy Agency (IAEA) has established a series of safety guides and standards constituting a high level of safety for protecting people and the environment. IAEA safety guides present international good practices and increasingly reflects best practices to help users striving to achieve high levels of safety. Pertinent to this regulatory guide, IAEA Safety Guide NS-G-1.10, “Design of Reactor Containment Systems for Nuclear Power Plants” (Ref. 16), addresses the requirements of management of radionuclides leaking through a containment of Nuclear Power Plants, including a procedure how to control the leakage. The NRC has an interest in facilitating the harmonization of standards used domestically and internationally. This regulatory guide is consistent with the recommendations and guidance in the IAEA Safety Guide NS-G-1.10. Figure 1. Example of a control room ESF atmosphere cleanup traina a Other acceptable configurations exist; this figure is only provided for conceptual purposes. Air Handling Unit Control Room Envelope Nonemergency Outside Air Intake Emergency Outside Air Intake Closed Dampers Fan MS* Heater Prefilter HEPA Adsorber HEPA Opened Damper Opened Damper Control Room DG-1274, Page 7 Figure 2. Example of a shield, annulus, and/or fuel building ESF atmosphere cleanup traina a Other acceptable configurations exist; this figure is only provided for conceptual purposes. C. STAFF REGULATORY GUIDANCE 1. General Design and Testing Criteria ASME AG-1-2009 with addenda (Ref. 13) and ASME N509-2002 (Ref. 11) provide criteria