Document: NUREG-0800
Document ID: 2c839e4a-a342-4e25-9a7c-82d678a0f754
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340657.pdf
Revision Date: 2023-06
Chapter: 6
Section ID: 6
CFR Part: 
CFR Title: 

Content:
are conservative. If analytical methods other thar the General Electric mode, are used, the CSB, in conjunction with its con.ujtants, will initiate a detailed review of the methods. In this case, the CSB reviews the proposr modeling, analytical methods and assumptions, correlation of results with applicable test data, and comparison with other s milar analyses, to determine the acceptability of the proposed modei'. 6.2.1.1.C-6 Rev. 6 - August 1984 The CSB reviews analyses of the drywell response to either a recirculation line rupture or a steam line rupture, as presented in the safety analysis report. The CSB determines from the results of these analyses that the "worst" break has been identified in establishing the drywell-wetwell design differential pressure as well as the design pressure for subcompartments and equipment supports. Modifications to the CONTEMPT-LT computer code have been made which pro- vide the capability to perform confirmatory analyses of the Mark III drywell pressure response. 2. The review of the dynamic loads associated with a LOCA have been concluded with the issuance of NUREG-0661 for Mark I plants, NUREG-0808 for Mark II plants and NUREG-0978 for Mark III plants. The review of the dynamic loads associated with the actuation of one or more primary coolant system safety/relief valves have been concluded with the issuance of NUREG-0661 for Mark I plants, NUREG-0802 for Mark II and Mark III plants. 3. For Mark III plants, the CSB verifies from the safety analysis report that high energy lines which pass through the containment outside the drywell are provided with guard pipes or enclosed in other types of protective structures. If guard pipes are used, the design must meet the acceptance criteria established in SRP Sections 3.6.2 and 3.8.3. For unguarded lines, 'the CSB reviews analyses of the consequences of postulated ruptures in these lines. The CSB bases its acceptance of the analyses on the conser- vatism of the methods and assumptions