ENS 45035
ENS Event | |
|---|---|
14:39 Apr 30, 2009 | |
| Title | Hpci Declared Inoperable Due to Failure of Test Line Pressure Control Valve During Surveillance Test |
| Event Description | During plant startup on 4/29/09 at 2239 [EDT], the startup had progressed to the point where plant conditions were adequate to allow performance of SR 3.5.1.9, High Pressure Coolant Injection (HPCI) System flow testing against system head corresponding to reactor pressure. A Note to SR 3.5.1.9 allows 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> to perform this test after adequate reactor steam dome pressure and flow have been established for test performance.
During the test performance, the test line pressure control valve did not properly operate to establish the required system head. The HPCI system was shutdown and returned to Standby. Earlier, on 4/29/09, SR 3.5.1.10, low pressure HPCI flow testing was successfully completed. Troubleshooting of the test line pressure control valve was begun. At 1039 [EDT] on 4/30/09, the 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> allowance of the Note to SR 4.5.1.9 expired and the HPCI system was declared inoperable for failure to complete the required surveillance. The HPCI system remains in Standby and is configured to perform its safety function. However, this event represents a potential loss of a single train safety system pending repair of the test line pressure control valve and completion of flow testing. With HPCI inoperable, the Unit is in the 14-day Tech. Spec. Action Statement 3.5.1. The licensee is revising their surveillance procedure to allow for manual operation of the failed control valve and estimates that the required testing will be completed within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. The Unit will remain in Mode 2 pending completion of this test. The licensee informed the NRC Resident Inspector.
High Pressure Coolant Injection (HPCI) Surveillance Requirement 3.5.1.9, HPCI system flow testing against system head corresponding to reactor pressure, was satisfactorily completed and HPCI declared OPERABLE May 1, 2009 at 0221 hours0.00256 days <br />0.0614 hours <br />3.654101e-4 weeks <br />8.40905e-5 months <br />. There was no loss of HPCl safety function. Therefore this event is retracted. Notified R3DO (Hills). |
| Where | |
|---|---|
Fermi  Michigan (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+3 h0.125 days <br />0.0179 weeks <br />0.00411 months <br />) | |
| Opened: | Jim Konrad 17:39 Apr 30, 2009 |
| NRC Officer: | Steve Sandin |
| Last Updated: | May 1, 2009 |
| 45035 - NRC Website | |