Document: NUREG-0800
Document ID: 1dda396e-398a-4b85-aa13-c5c1dbf82bc2
Document Type: srp
Title: MINIMUM CONTAINMENT PRESSURE ANALYSIS FOR EMERGENCY CORE COOLING SYSTEM
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340670.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.1.5
CFR Part: 
CFR Title: 

Content:
ent and cannot be used to determine the containment design basis. II. ACCEPTANCE CRITERIA CSB acceptance criteria is based on meeting the relevant requirements of 10 CFR Part 50, §50.46 and paragraph I.D.2 of Appendix K to 10 CFR Part 50 which requires that the containment pressure used to evaluate the performance capa- bility of a PWR emergency core cooling system shall not exceed a pressure calculated conservatively for that purpose. The guidelines given below indicate the conservatism that analyses of the containment response to loss-of-coolant accidents should have for determining the minimum containment pressure for ECCS performance capability studies: 1. Calculations of the mass and energy released during postulated loss-of- coolant accidents should be based on the requirements of Appendix K to 10 CFR Part 50 (Ref. 2). 2. Branch Technical Position CSB 6-1, "Minimum Containment Pressure Model for PWR ECCS Performance Evaluation," delineates the calculational approach that should be followed to assure a conservative prediction of the minimum containment pressure. III. REVIEW PROCEDURES The review procedures described below are followed for the review of the minimum containment pressure analysis. The reviewer selects and emphasizes material from these procedures as fhay be appropriate for a particular case. Portions of the review may be carried out on a generic basis or by applying the results of previous reviews of similar plants. The CSB reviews the analyses in the safety analysis report of the minimum con- tainment pressure following a loss-of-coolant accident. The RSB confirms the validity of the applicant's mass and energy release data. The CSB evaluates the conservativeness of the assumptions used by the applicant regarding the operation of containment heat removal systems and the effectiveness of structural heat sinks, by comparing the applicant's calculational approach to the method outlined in Branch Technical Position CSB 6-1. In certain cases, the CSB