ENS 51882
ENS Event | |
|---|---|
02:17 Apr 26, 2016 | |
| Title | High Pressure Coolant Injection System Declared Inoperable |
| Event Description | 8-hour report due to HPCI inoperability.
At approximately 2109 [CDT] on 04/25/16, a licensed operator performing a control room panel walkdown noted the green light for HPCI Auxiliary Oil Pump (AOP) was not illuminated. The bulb was replaced and the replacement bulb did not illuminate. A non-licensed operator was dispatched to the local 250VDC starter rack. Both the green and red power indicating lights on the starter rack were found extinguished. An attempt was made to start the AOP with the control switch. The pump did not start. The AOP is required to start in order to open the steam admission valves for the HPCI turbine. HPCI was declared inoperable at time 2117 [CDT], resulting in entry into Tech Spec LCO 3.5.1 Condition C - HPCI System Inoperable. Required Actions for Condition C are to verify by administrative means RCIC System is operable within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and restore HPCI System to operable status within 14 days. RCIC was verified operable by administrative means concurrent with HPCl declaration. Troubleshooting activities for HPCI are being planned. HPCI is a single train system. This report is submitted as a condition that at time of discovery could prevent the fulfillment of the safety function of an SSC [Structures, Systems, and Components] needed to mitigate the consequences of an accident. The licensee informed the NRC Resident Inspector. |
| Where | |
|---|---|
Cooper  Nebraska (NRC Region 4) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| LER: | 05000298/LER-2016-001 |
| Time - Person (Reporting Time:+-0.38 h-0.0158 days <br />-0.00226 weeks <br />-5.20524e-4 months <br />) | |
| Opened: | Aric Harris 01:54 Apr 26, 2016 |
| NRC Officer: | Steve Sandin |
| Last Updated: | Apr 26, 2016 |
| 51882 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |