Document: NUREG-0800
Document ID: 6de5c1bb-88d0-4d17-8255-a248a8db304a
Document Type: srp
Title: SUBCOMPARTMENT ANALYSIS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070487.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6.2.1.2
CFR Part: 
CFR Title: 

Content:
5 DRAFT Rev. 3 - April 1996 design margin will assure that the design can meet all postulated accidents regardless of unanticipated factors. Following GDC 50 will provide assurance that the structural integrity of containment subcompartments is maintained and that the containment structure and systems are protected from the effects of a subcomaprtment high energy line break. III. REVIEW PROCEDURES The procedures described below are followed for the subcompartment analysis review. The reviewer selects and emphasizes material from these procedures as may be appropriate for a particular case. Portions of the review may be carried out on a generic basis or by adopting the results of previous reviews of plants with essentially the same subcompartment and high pressure piping design. Upon request from the primary reviewer, the other review branches will provide input for the areas of review stated in subsection I of this SRP section. The primary reviewer obtains and uses such input as required to assure that this review procedure is complete. 25 The SCSB may perform confirmatory analyses of the blowdown mass and energy profiles 26 within a subcompartment. The analysis is done using the RELAP-4 computer program (Reference 1512) or the COMPARE computer program (Reference 1411) . The purpose of 27 28 the analysis is to confirm the predictions of the mass and energy release rates appearing in the safety analysis report, and to confirm that an appropriate break location has been considered in this analysis. The SCSB determines the adequacy of the information in the safety analysis report regarding subcompartment volumes, vent areas, vent resistances, and inertia terms. If a subcompartment must rely on doors, blowout panels, or equivalent devices to increase vent areas, or unique flow limiting devices to control vent flows, the SCSB reviews the analysis and testing programs that 29 substantiate their use. The EMEB and SEBECGB will evaluate the mechanical and structural 30 31