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Status of the Surry low power and shutdown PRA [probabilistic risk analysis]
T-L. Chu, W.J. Luckas, Zoran Musicki, R. Fitzpatrick
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Abstract
The Surry low power and shutdown probabilistic risk analysis (PRA) is an ongoing project at Brookhaven National Laboratory (BNL) to identify and quantify potential accident scenarios that may occur in a pressurized water reactor (PWR) during low power and shutdown. It was initiated as a result of various incidents and accidents that have occurred within the United States and overseas. The project involves review and evaluation of PWR experience at shutdown, identification of accident scenarios, determination of methods to mitigate the accidents, and performance a level 1 PRA. An evaluation of accident progression, source terms, and consequences has also been initiated. The results will be used to address issues related to shutdown conditions. The objective of this paper is to provide a progress report on the project, and to present the approach used as well as preliminary results of the ongoing and completed tasks. 14 refs., 1 fig., 5 tabs.
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