Production Test No. 379: Test of HPI System Response for Single Bus Scram. Final Report

摘要

The test was performed 5-9-75 at the time of reactor shutdown for the summer outage. The purpose of the test was to verify that the response of the primary coolant inventory control system is adequate to prevent draining the pressurizer and to avoid actuation of the primary loop pressure relief valves during a full power scram shrinkage transient, assuming a simultaneous loss of A bus electrical power to the high pressure injection pumps. A second purpose of the test was to dynamically test a series of modifications made to improve the reliability and performance of the High Pressure Injection (HPI) and Pressurizer Level and Pressure Control Systems. Satisfactory control of the shrinkage transient had been demonstrated by reactor scrams from full power when both A and B buses were in service; however, the adequacy of inventory control had never been tested for the case of a full power scram and a simultaneous loss of the two A or the two B bus, HPI pumps. (ERA citation 04:000793)