05000482/FIN-2008002-06
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Finding | |
|---|---|
| Title | Failure to establish reasonable expectation of operability. |
| Description | The NRC identified a noncited violation of Technical Specification 5.4.1 for failure to follow the operability process on discovery of the centrifugal charging Pump A room cooler leak. On February 13, 2008, at 2:20 p.m., the control room was notified of a leak from the room cooler for the centrifugal charging pump. At that time, it could not be established if the leak would cause a loss of structural integrity of essential service water. Wolf Creek made no log entries at 2:20 p.m. stating its basis for immediate operability. At 3:50 p.m., Wolf Creek control room logs documented that centrifugal charging Pump A had a room cooler leak and structural integrity cannot be verified. Subsequent entry into Technical Specification 3.7.8 for the essential service water Pump A caused emergency diesel Generator A to be inoperable. Technical Specification 3.8.1, Condition I, states that with three alternating current sources inoperable (both emergency diesel generators and an offsite source), Technical Specification 3.0.3 shall be entered. Wolf Creek exited Technical Specification 3.0.3 at 4:13 p.m. when the inlet and outlet valves to centrifugal charging Pump As room cooler were closed. The inspectors could not locate any justification produced by Wolf Creek for the room coolers operability after 2:20 p.m. The inspectors determined that the failure to follow the operability process is a performance deficiency. The inspectors determined that this finding was more than minor because if left uncorrected, it could become a more serious problem if the operability process is not correctly applied. The finding screened to Phase 2 because the finding represents an actual loss of safety function of a single train of high head injection. A bounding risk of Green results from the Phase 2 presolved worksheets using an exposure time of less than 3 days for the Centrifugal Charging Pump (CCP) A [Fails to Run]. The inspectors also determined that the finding had a human performance crosscutting aspect in the area associated with decision making because the licensee failed to use conservative assumptions in its operability decision and apply a requirement to demonstrate that the room cooler is operable in order to proceed rather than a requirement to demonstrate that it is inoperable H.1(b) (Section 4OA3.2(ii)) |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2008002 Section 4OA3 |
| Date counted | Mar 31, 2008 (2008Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | C Long D Stearns G Pick S Cochrum V Gaddy |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Wolf Creek - IR 05000482/2008002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2008Q1
Self-Identified List (Wolf Creek)
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