05000482/FIN-2007003-05
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Finding | |
|---|---|
| Title | Failure to follow test control procedures to demonstrate operability |
| Description | The inspectors identified a noncited violation of 10 CFR, Part 50, Appendix B, Criterion XI, Test Control, in which Wolf Creek did not implement controlled testing of the Train B emergency exhaust system fan to demonstrate operability prior to returning the fan to service after bearing replacement. Specifically, on June 12, 2007, Wolf Creek restored the B emergency exhaust system fan to service without implementing the postmaintenance testing described in Procedure AP 16E-002, Postmaintenance Testing Development, Revision 6A. Upon review of the postmaintenance testing, the fan failed the vibration portion of the testing and Wolf Creek did not perform an operability evaluation in accordance with Procedure AP 28-001, Operability Evaluations. Based on inspector questioning, Wolf Creek performed the correct postmaintenance testing and an operability evaluation. These issues are under evaluation in the Wolf Creek corrective action program. The failure to follow test control procedures for the safety-related B emergency exhaust system fan prior to declaring it operable is a performance deficiency. The finding is more than minor because it is associated with the Barrier performance attribute of the Barrier Integrity Cornerstone; and, it affected the cornerstone objective to maintain radiological barrier functionality of the auxiliary and fuel building. The finding is of very low safety significance because the issue represents a degradation of only the radiological barrier function provided for the auxiliary or fuel building barriers to mitigate airborne radionuclides from emergency core cooling system pump cubicles or a fuel handling accident. The cause of the finding has human performance crosscutting aspects in the area of decision making because Wolf Creek did not initially conduct an adequate test and then failed to question the failed postmaintenance test by making a safety-significant or risk-significant decision using proceduralized systematic processes, especially when faced with uncertain or unexpected plant conditions, to ensure safety is maintained (H.1(a)). (Section 1R19) |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2007003 Section 1R19 |
| Date counted | Jun 30, 2007 (2007Q2) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | C Long J Cruz S Cochrum |
| CCA | H.13, Consistent Process |
| INPO aspect | DM.1 |
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Finding - Wolf Creek - IR 05000482/2007003 | |||||||||||||||||
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Finding List (Wolf Creek) @ 2007Q2
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