ENS 44290
ENS Event | |
|---|---|
04:40 Jun 12, 2008 | |
| Title | High Pressure Coolant Injection (Hpci) System Identified Inoperable During Surveillance |
| Event Description | Unit 2 HPCI was declared inoperable during the performance of a scheduled surveillance test. HPCI failed to develop the required discharge pressure to meet its design function." Reactor Core Isolation Cooling (RCIC) is available. The licensee notified the NRC Resident Inspector.
The purpose of this notification is to retract a previous report made on 6/12/08 at 0549 hours0.00635 days <br />0.153 hours <br />9.077381e-4 weeks <br />2.088945e-4 months <br /> (EN 44290). On 6/12/08, the High Pressure Coolant Injection (HPCI) system was declared inoperable as a result of the performance of a routine Surveillance Test (ST). During the ST, the HPCI pump discharge pressure did not achieve the acceptance criteria of greater than or equal to 1258 psig. The highest indicated pressure achieved during the ST was approximately 1230 psig. Therefore, notification of this issue to the NRC on 6/12/08 as a loss of the HPCI safety function was initially made as a result of the belief that the HPCI system was inoperable due to inadequate discharge pressure. HPCI was maintained in an available status as troubleshooting began. During subsequent troubleshooting on 6/12/08, it was determined that the Main Control Room HPCI discharge pressure indicator (i.e., the pressure indicator used during the ST) was reading approximately 65 psig low. Therefore, the pressure indicator used during the ST indicated a low value for discharge pressure. Based on this, the actual HPCI discharge pressure during the ST was acceptable. The pressure indicator was recalibrated and the HPCI ST was re-performed successfully. HPCI was declared operable by 1805 hours0.0209 days <br />0.501 hours <br />0.00298 weeks <br />6.868025e-4 months <br /> on 6/12/08. Based on the above, there were no unplanned loss of the safety function for the HPCI system. Therefore, the initial ENS notification is being retracted. " Licensee has notified NRC Resident Inspector. Notified R1DO (Schmidt) |
| 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 | |
| Time - Person (Reporting Time:+1.13 h0.0471 days <br />0.00673 weeks <br />0.00155 months <br />) | |
| Opened: | Barry Blevins 05:48 Jun 12, 2008 |
| NRC Officer: | Pete Snyder |
| Last Updated: | Jun 17, 2008 |
| 44290 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |