ENS 41107
ENS Event | |
|---|---|
05:15 Oct 9, 2004 | |
| Title | High Pressure Coolant Injection System Condensate Storage Tank Suction Valve Failed To Auto-Close During Surveillance |
| Event Description | The following information was obtained from the licensee via facsimile:
During the performance of scheduled instrument surveillance testing it was discovered that the Unit 3 High Pressure Coolant Injection (HPCI) pump suction valve from the Condensate Storage Tank (CST) would not automatically close. This valve is designed to automatically close when both Torus suction valves are fully open. The CST suction valve is required to close to support operability of the HPCI System. The CST suction valve was subsequently closed with the Torus suction valves open to allow performance of the HPCI instrumentation testing. After the completion of scheduled instrumentation testing, the HPCI system will be restored to an operable status with pump suction remaining from the Torus and isolated from the CST. The failure of the CST suction valve to auto close is being investigated. The licensee has informed the NRC Resident Inspector. |
| Where | |
|---|---|
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: | 05000278/LER-2004-003 |
| Time - Person (Reporting Time:+-0.03 h-0.00125 days <br />-1.785714e-4 weeks <br />-4.1094e-5 months <br />) | |
| Opened: | William Dalton 05:13 Oct 9, 2004 |
| NRC Officer: | Howie Crouch |
| Last Updated: | Oct 9, 2004 |
| 41107 - NRC Website
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Unit 3 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |