ENS 44188
ENS Event | |
|---|---|
16:37 May 5, 2008 | |
| Title | High Head Safety Injection Manual Valve to Cold Leg Found Mispositioned During Heatup |
| Event Description | This is all eight-hour non-emergency reportable event to the NRCOC in accordance with 10 CFR 50.72 (b)(3)(v)(D) for a condition that could have prevented the fulfillment of a safety function.
High Head Safety Injection (HHSI) pump discharge to cold leg injection isolation valve 4-867 was discovered out of position while in a refueling outage (4-24.) The valve was discovered out of position on 5/5/08 at 12:37 and placed in its correct position, locked open and back-seated, at 13:07. Valve 4-867 is required to be locked open and back-seated when the reactor coolant system (RCS) temperature is greater than 380 degrees F, per Technical Specification 3.5.2. Unit 4 was in Technical Specification 3.0.3 (no OPERABLE cold leg injection flowpath for all HHSI pumps to Unit 4) for 30 minutes from time of discovery at 12:37 until correction at 13:07. Valve 4-867 was out of its required position for 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> and 26 minutes when the RCS was above 380 degrees F at 07:41 until it was correctly repositioned at 13:07. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Turkey Point  Florida (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+0.43 h0.0179 days <br />0.00256 weeks <br />5.89014e-4 months <br />) | |
| Opened: | Glenn Burge 17:03 May 5, 2008 |
| NRC Officer: | Bill Huffman |
| Last Updated: | May 5, 2008 |
| 44188 - NRC Website
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Unit 4 | |
|---|---|
| Reactor critical | Not Critical |
| Scram | No |
| Before | Hot Standby (0 %) |
| After | Hot Standby (0 %) |