ENS 40671
ENS Event | |
|---|---|
23:10 Apr 12, 2004 | |
| Title | High Pressure Coolant Injection System (Hpci) Declared Inoperable |
| Event Description | High Pressure Coolant Injection System Incapable of Performing its intended Safety Function.
This report is being made in accordance with 10 CFR 50.72(b)(3)(v) due the High Pressure Coolant Injection System being incapable of performing its intended safety function. At 1810 hours0.0209 days <br />0.503 hours <br />0.00299 weeks <br />6.88705e-4 months <br /> (CDT) during performance of the functional test of the level instrumentation for the automatic realignment of the High Pressure Coolant Injection system (HPCI) suction sources, plant maintenance person identified that logic circuitry leads had been lifted. The leads not being connected would prevent the automatic realignment of the HPCI suction from its non-safety related source, the Condensate Storage Tank (CST), to its safety related source, the Suppression Pool. Based on preliminary information, the leads were lifted during scheduled maintenance activities on the HPCI system in March. The applicable Technical Specification specified that HPCI be declared inoperable within an hour. Actions were immediately taken to restore the automatic function. The leads were re-landed and the TS condition exited at 1853 hours0.0214 days <br />0.515 hours <br />0.00306 weeks <br />7.050665e-4 months <br />. The inability of the system to automatically realign due to a CST low level or a Suppression Pool high level is considered to be a condition that would prevent the fulfillment of the safety function of the HPCI system. The licensee is still investigating the cause. The NRC Resident Inspector was notified. |
| Where | |
|---|---|
Dresden  Illinois (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:+1.6 h0.0667 days <br />0.00952 weeks <br />0.00219 months <br />) | |
| Opened: | Edward Burns 00:46 Apr 13, 2004 |
| NRC Officer: | Chauncey Gould |
| Last Updated: | Apr 13, 2004 |
| 40671 - NRC Website
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Unit 2 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |