Document: NUREG-0800
Document ID: 3e34268a-a6f4-4ce5-ba4d-7f2cec5a192e
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070481.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
ntainment design pressure and temperature, and in addition, the containment depressurization time. The PERBAEB must be notified if the containment depressurization 25 time does not meet the acceptance criterion. The SCSB reviews the assumptions made in the analyses to maximize the calculated containment pressure and temperature. The SCSB determines the conservatism of the respective containment response analyses by comparing the analytical models, and the assumptions made, with the acceptance criteria in subsection II of this SRP section and by performing appropriate confirmatory analyses. It is not necessary to perform accident pressure calculations for every plant. The SCSB will ascertain, however, that the adequacy of the applicant's calculational model has been demonstrated. The SCSB determines that the applicant has identified the pipe break(s) resulting in the highest containment pressure and temperature. Hot leg, cold leg (pump suction), and cold leg (pump discharge) pipe breaks of the reactor coolant system, and secondary system steam and feedwater line breaks, should be analyzed by the applicant. The SCSB reviews the assumptions used to determine 26 that the analyses are acceptably conservative. Design Certification applicants should meet the CP containment design pressure margin criterion in subsection II.a. 27 The SCSB verifies that the containment is designed to withstand either hydrogen burning or initiation of the post-accident inerting system, if installed, during an accident that releases DRAFT Rev. 3 - April 1996 6.2.1.1.A-8 hydrogen from a 100% fuel clad metal-water reaction as described in specific criterion II.j of this SRP section.28 If a post-accident inerting system is utilized, the SCSB verifies the containment is designed to withstand inadvertent actuation of this system.29 The SCSB performs confirmatory containment response analyses when necessary using the CONTEMPT-LT computer code (References 5 and 66 and 7 ). The purpose of these