Westinghouse reload safety evaluation methodology

Technical Report · Wed Mar 01 04:00:00 EST 1978

OSTI ID:6810437

Bordelon, F M; Dabby, D; Fici, J A; Freeman, T R; Hollingsworth, S D; McAtee, K R; Meyer, L F; Richardson, D C; Risher, D H

The report describes the reload safety evaluation methodology employed by Westinghouse. The goal of the reload safety evaluation is to confirm the validity of the existing safety analysis. The existing safety analysis is defined as the reference safety analysis and is intended to be valid for all plant cycles. Thus safety analysis input parameter values are selected to bound the values expected in all subsequent cycles. This bounding analysis concept is the key to the Westinghouse reload safety analysis methodology. When all reload safety related parameters for a given accident are bounded, the reference safety analysis is valid. On the other hand, when a reload parameter is not bounded, further evaluation is necessary. The purpose of this further evaluation is to confirm that the margin of safety as defined in the basis for any technical specification is not reduced. This reload safety evaluation methodology is applied whenever the input parameter values for a reference safety analysis are available. Thus the methodology may be employed for Westinghouse reloads in non-Westinghouse reactors, as well as Westinghouse reactors. Included in this report are (1) a systematic evaluation to determine whether the reload parameters are bounded by the values used in the reference safety analysis, and (2) a determination of the effects on the reference safety analysis when a reload parameter is not bounded to ensure that specified design bases are met.

• Research Organization: Westinghouse Electric Corp., Pittsburgh, Pa. (USA)
• OSTI ID: 6810437
• Report Number(s): WCAP-9273
• Country of Publication: United States
• Language: English

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