Document: NUREG-0800
Document ID: 9e785a38-4746-4e32-949d-a145ddb95511
Document Type: srp
Title: MASS AND ENERGY RELEASE ANALYSIS FOR POSTULATED
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070491.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.1.4
CFR Part: 
CFR Title: 

Content:
SECONDARY SYSTEM PIPE RUPTURES REVIEW RESPONSIBILITIES Primary - Containment Systems and Severe Accident Branch (SCSB) 1 Secondary - None I. AREAS OF REVIEW The SCSB reviews the analyses of the mass and energy release to assure that the data used to evaluate the containment and subcompartment functional design are acceptable for that purpose. The SCSB review includes the following areas: 1. The energy sources that are available for release to the containment. 2. The mass and energy release rate calculations. The SCSB also reviews the single-failure analyses performed for steam and feedwater line 2 isolation provisions which would limit the flow of steam or feedwater to the assumed pipe rupture. DRAFT Rev. 2 - April 1996 6.2.1.4-2 Review Interfaces3 In addition, the SCSB will coordinate other branches' evaluations that interface with the overall review of this area as follows: 1. The Mechanical Engineering Branch (EMEB) is responsible for reviewing the seismic 4 classification and system quality group classification of steam and feedwater line isolation valves to determine the acceptability of these valves in limiting the mass and energy releases from the steam and feedwater system as part of its primary review responsibility for (see Standard Review Plan Sections 3.2.1 and 3.2.2). The EMEB will 5 also review postulated pipe break locations and sizes as part of its primary review responsibility for SRP Section 3.6.2.6 2. The Auxiliary Systems Branch (ASB)Plant Systems Branch (SPLB) reviews the time 7 assumed for operator action to close manual valves in the auxiliary feedwater system as part of its primary review responsibility for(see Standard Review Plan Section 10.4.9). 8 For those areas of review identified above as being reviewed as part of the primary review responsibility of other branches, the acceptance criteria and their methods of application are contained in the referenced SRP section of the corresponding primary branch. II. ACCEPTANCE CRITERIA The SCSB