05000482/FIN-2012003-01
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Finding | |
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| Title | Unacceptable Leakage Through Safety Related Watertight Door During Loss of Offsite Power |
| Description | A self-revealing non-cited violation of 10 CFR 50, Appendix B, Criterion V, Inspections, Procedures, and Drawings, was identified as a result of a leaking watertight door that was observed on January 13, 2012. Station procedure MPM XX-002, Watertight Door Preventive Maintenance Activities, failed to ensure the proper position of the alignment screws, which resulted in leakage through a misalignment between the door and its threshold. During the January 13, 2012, loss of offsite power, the auxiliary building general area sump pumps did not operate for approximately 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. Condensed steam and other effluents slowly accrued in the stairwell area outside the containment spray pump rooms to a depth of 24 to 36 inches. The train B containment spray pump room watertight door leaked approximately 10 gallons per minute and pooled in both the containment spray pump room and the residual heat removal pump room to a depth of three inches. This issue was entered into the corrective action program under condition report 51622. The licensee corrected the procedure and realigned the affected watertight doors. Failure to properly adjust safety-related watertight door alignment screws during testing activities is a performance deficiency. The performance deficiency is more than minor and therefore a finding because, if left uncorrected it could lead to a more significant safety concern. Using Inspection Manual Chapter 0609, Appendix A, the finding was characterized using Exhibit 4, Seismic, Flooding, and Severe Weather Screening Criteria. The finding was determined to be of very low safety significance (Green) because the degraded flood protection equipment would not have caused a plant trip or other initiating event, would not degrade two or more trains of a multi-train safety system, would not degrade one or more trains of a supporting system, and the finding does not involve the total loss of any safety function. The inspectors determined the cause of this finding was not indicative of current performance. |
| Site: | Wolf Creek  |
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| Report | IR 05000482/2012003 Section 1R06 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | C Long C Peabody C Alldredge N Greene N Makris A O 'Donnelll Ricketson L Carson N O 'Keef |
| INPO aspect | |
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Finding - Wolf Creek - IR 05000482/2012003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2012Q2
Self-Identified List (Wolf Creek)
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