Abstract
A model for the potential reactor coolant pump seal loss-of-coolant accident in a Westinghouse Electric Corporation pressurized water reactor following a loss of component cooling water (CCW) is developed based on state-of-the-art knowledge. The potential operator recovery actions in coping with a loss-of-CCW event are investigated, and an event tree is constructed to describe the possible core melt sequences. The sequence frequencies are plant specific; however, evaluations (of the sequence frequencies) demonstrate that an emergency operating procedure that clearly identifies possible recovery actions can reduce the core melt probability by two orders of magnitude.
Published Version
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