Evaluation of core damage sequences initiated by loss of reactor coolant pump seal cooling

This report is concerned with core damage accident sequences initiated by loss of component cooling water, leading to loss of reactor coolant pump seal cooling, subsequent primary coolant leakage, and failure to make up the coolant loss. Three plants are considered: Indian Point Unit 3, Midland Unit 2, and Calvert Cliffs Unit 1. It is shown that design differences in the overall seal cooling support systems are responsible for considerable variation in the likelihood of, and plant response to, loss of component cooling.