Document: NRC Regulatory Guide
Document ID: 14983af3-17d8-4f7b-866e-8d603a0f811c
Document Type: regulatory_guide
Title: Assumptions Used for Evaluating the Potential Radiological Consequences of a Loss of Coolant Accident for Pressurized Water Reactors (Rev. 2)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003739614.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.4
CFR Part: 
CFR Title: 

Content:
materials should be evaluated on an individual case basis. e. The primary reactor containment should be assumed to leak at the leak rate incorporated or to be incorporated as a technical specification requirement at peak accident pressure for the first 24 hours, and at 50 percent of this leak rate for the remaining duration of USAEC REGULATORY GUIDES Copies of published guide may. be obtained by request indicating the divisions desired to the US. Atomic Enemgy Commilss•o, Washlngton. D.C. 20646, Regulatory Guides we issuad to describe and make available to the public Attention: Director of Regulatory Standards. Comments and suggestions for methods acceptable to the AEC Regulatory staff of implementing specific parts of Impr° ments In theose uldes we encouraged and should be sent to the Secretary the Commission's regulations, to delineate techniques used by the staff in of the Commislion, U.S. Atomic Energy Commission, Washington, D.C. 20645, eanluating specific problems or postulated accidents, or to provide guidance to Attention: Chief, Public ProcoedlnglStaff. applicants. Regulatory Guides are not substitutes for regulations and compliance with them is not required. Methods and solutions different from those set out in The guides are issued in the following ten broad divisions: the guides will be acceptable if they provide a basis for the findings requisite to the Issuance or continuance of a permit or )iconse by the Commission. 1. PeOWrd Reactors 6. Products 2. Research end Test Reactors 7. Transportation 3. Fuels end Materials Facilities EL Occupatlonal Health Published guides will be revised periodically, as appropriate, to accommodate 4. Environmental and Siting 9. Antitrust Review comments and to reflect new information or experienca. 5. Materials and Plant Protection 10. General the accident., Peak accident pressure is the maximum pressure defined in the technical specifications for containment leak testing. 2. Acceptable assumptions for atmospheric