ENS 40384
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ENS Event | |
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23:00 Dec 10, 2003 | |
Title | Reduction in Accident Mitigation Due to Improper Hpci Suction Transfer |
Event Description | During the performance of planned Unit 2 High Pressure Coolant Injection (HPCI) Logic System Functional Surveillance testing an unexpected condition occurred. It was observed during the HPCI suction swap from the Condensate Storage Tank (CST) to the Torus, that the CST level lowered and the Torus level rose unexpectedly. At that time, the test was aborted and the system was restored to an available status but maintained Tech. Spec. inoperable pending additional evaluation. Following the evaluation, it was determined that the HPCI system Torus suction check valve permitted reverse flow. The HPCI system could not be restored to an operable status and requires additional troubleshooting and maintenance to return to an operable status."
The licensee notified the NRC Resident Inspector. |
Where | |
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Peach Bottom ![]() Pennsylvania (NRC Region 1) | |
Reporting | |
10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
LER: | 05000277/LER-2002-003-05 Re Loss of High Pressure Coolant Injection System Function as a Result of Less than Adequate Check Valve Condition |
Time - Person (Reporting Time:+0.82 h0.0342 days <br />0.00488 weeks <br />0.00112 months <br />) | |
Opened: | Alan Raush 23:49 Dec 10, 2003 |
NRC Officer: | Jeff Rotton |
Last Updated: | Dec 11, 2003 |
40384 - NRC Website
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Unit 2 | |
---|---|
Reactor critical | Critical |
Scram | No |
Before | Power Operation (100 %) |
After | Power Operation (100 %) |
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