Document: NUREG-0800
Document ID: a28650b3-fa03-428d-a2bd-4a27f583710b
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070484.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
margin for BWR pressure-suppressionMark I, II and III plants at the operating license 29 stage of review, the peak calculated values of pressure and temperature for the drywell and wetwell should not exceed the respective design values. Also, the peak deck differential pressure for Mark II plants should not exceed the design value. Acceptable methods for the calculation of BWR pressure-suppressionMark I, II and III containment 30 environmental response to loss-of-coolant accidents are found in NUREG-0588 (Reference. 357) . 31 For Mark III plants, the calculated results for drywell pressure and temperature, containment pressure and temperature, and differential pressure between the drywell and containment should be based on the General Electric Mark III analytical model (Reference. 2336) that was used in the ABWRGrand Gulf analysis and evaluated by 32 33 SCSB . The use of this model at the construction permit stage is acceptable if an 34 appropriate margin (see below) between the calculated and design differential pressures is used. The Mark III analytical model hashave been verified by the large-scale Mark 35 III test results. If an analytical model other than the General Electric Mark III analytical model identified above is used, the model should be demonstrated to be physically appropriate and conservative to the extent that the General Electric model has been found acceptable. In addition, it will be necessary to demonstrate its performance with suitable test data in a manner similar to that described above. For ABWR plants, the calculated results for containment short-term and long-term response to postulated line breaks are based on the General Electric Mark III (ABWR) analytical model that was used in the ABWR standard plant analysis and evaluated by SCSB in the ABWR FSER (Reference 13).36 6.2.1.1.C-5 DRAFT Rev. 7 - April 1996 For Mark III plants at the construction permit stage, the containment design pressure should provide at least a 15% margin above the