Document: NUREG-0800
Document ID: a2d035da-992b-42e8-894f-787a019b437d
Document Type: srp
Title: NUCLEAR DESIGN
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070410.pdf
Revision Date: 2023-06
Chapter: 4
Section ID: 4.3
CFR Part: 
CFR Title: 

Content:
to the design bases for overpower and loss of flow transients. The envelope of these analyses must be shown to be valid for all normal operating modes and anticipated reactor conditions. (See Table 1 of Reference 2 for the cases which must be analyzed to form such an envelope.) 2. A description of the codes used, how cross-sections for cycle were determined, and what F values were used. xy 3. A commitment to perform load-follow tests wherein F is determined by taking incore Q maps during the transient. (NOTE: Westinghouse has outlined for both the NRC staff and the ACRS an augmented startup test program designed to confirm experimentally the predicted power shapes. This program is presented in a Westinghouse report (Reference. 3). The tests will be carried out at several representative--both 15x15 and 49 17x17--reactors. We have endorsed these tests as has the ACRS in its June 12, 1975 letter for the Diablo Canyon plant. In addition, for the near term we plan to require that those licensees who propose to depart from the previously approved peaking factor and target band width perform similar tests, precisely which ones to be determined on a case- by-case basis, to broaden our confidence in analytical methods by extending the comparison of prediction with measurement to include more and more burnup histories. C. REFERENCES 1. T. Morita, et al., "Power Distribution Control and Load Following Procedures," WCAP-8385 (proprietary) and WCAP-8403 (nonproprietary), Westinghouse Electric Corporation, September 1974.50 2. C. Eicheldinger, Westinghouse Electric Corporation, letter to D. B. Vassallo, U.S. Nuclear Regulatory Commission, July 16, 1975.51 3. K. A. Jones, et al., "Augmented Startup and Cycle 1 Physics Program," WCAP-8575, Westinghouse Electric Corporation, August 1975.52 SRP Draft Section 4.3 Attachment A - Proposed Changes in Order of Occurrence 4.3-21 DRAFT Rev. 3 - April 1996 Item numbers in the following table correspond to superscript numbers in the