Document: NUREG-0800
Document ID: a4ef36de-b662-41f6-9e66-96e4b7197298
Document Type: srp
Title: MASS AND ENERGY RELEASE ANALYSIS FOR POSTULATED
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0601/ML060150002.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.1.3
CFR Part: 
CFR Title: 

Content:
e criteria and review procedures are contained in the referenced SRP section. II. ACCEPTANCE CRITERIA The acceptance criteria given below apply to the mass and energy release analysis for | postulated LOCAs. If the mass and energy analysis complies with the relevant requirements of | General Design Criterion 50 and 10 Code of Federal Regulations (CFR) Part 50, Appendix K, | paragraph I.A, then the staff considers the analysis acceptable. The relevant requirements are | as follows: A. General Design Criterion 50, as it relates to the containment and subcompartments being designed with sufficient margin, requires that the containment and its associated systems can accommodate, without exceeding the design leakage rate, and the containment and subcompartment design can withstand the calculated pressure and temperature conditions resulting from any LOCA. B. 10 CFR Part 50, Appendix K, as it relates to sources of energy during the LOCA, provides requirements to assure that all the energy sources have been considered. In meeting the requirements of General Design Criterion 50 the following specific criterion or criteria that pertain to the mass and energy analysis are used as included below: 1. Sources of Energy The sources of stored and generated energy that should be considered in analyses of LOCAs include: reactor power; decay heat; stored energy in the core; stored energy in the reactor coolant system metal, including the reactor vessel and reactor vessel internals; metal-water reaction energy; and stored energy in the secondary system (PWR plants only), including the steam generator tubing and secondary water. Rev. 2 - January 2006 6.2.1.3-3 Calculations of the energy available for release from the above sources should be done in general accordance with the requirements of 10 CFR Part 50, Appendix K, paragraph I.A. However, additional conservatism should be included to maximize the energy release to the containment during the blowdown and reflood phases of a LOCA. An