05000387/FIN-2012004-02
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Finding | |
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| Title | Inadequate Troubleshooting Results in Loss of Secondary Containment and Protected Equipment |
| Description | A self-revealing Green finding against PPL procedure NDAP-QA-0510, Troubleshooting Plant Equipment, was identified when inadequate troubleshooting caused repeated inoperability of secondary containment, an associated unplanned Unit 2 entry into a 4-hour limiting condition for operation (LCO) action statement, and a loss of the 1C fuel pool cooling (FPC) pump during equipment restoration. The FPC pump had been designated as protected equipment as a risk management action. The failure to perform adequate troubleshooting activities to identify and correct equipment problems prior to restoration was a performance deficiency that was within PPLs ability to foresee and prevent. PPL entered this issue into their CAP as CR 1628250. The inspectors determined that the finding was more than minor because it was associated with the configuration control attribute of the Barrier Integrity cornerstone and adversely affected its objective to provide reasonable assurance that physical design barriers protect the public from radionuclide releases caused by accidents or events. Specifically, the event resulted in the inoperability of secondary containment and loss of a FPC pump. The finding was evaluated in accordance with IMC 0609, Attachment 4, and Appendix A - Exhibit 3, and was determined to be of very low safety significance (Green) because the finding did not only represent a degradation of the radiological barrier function provided for the standby gas treatment system and it did not: a) cause the spent fuel pool to exceed a maximum temperature limit; b) cause mechanical fuel damage and detectable release of radionuclides; c) result in the loss of spent fuel pool water inventory; or d) affect spent fuel shutdown margin. This finding is related to the cross-cutting area of Human Performance Decision-Making because PPL did not make safety-significant or risk-significant decisions using a systematic process, especially when faced with uncertain or unexpected plant conditions, to ensure safety is maintained. Specifically, PPL failed to restore equipment in a systematic manner, given the intermittent nature of heater faults, to preclude a repeated loss of protected equipment and secondary containment. |
| Site: | Susquehanna  |
|---|---|
| Report | IR 05000387/2012004 Section 1R12 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | Finding: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | F Arner J Caruso J Greives P Finney P Kaufman P Krohn R Edwards R Rolph S Hammann S Ibarrola |
| CCA | H.13, Consistent Process |
| INPO aspect | DM.1 |
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Finding - Susquehanna - IR 05000387/2012004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Susquehanna) @ 2012Q3
Self-Identified List (Susquehanna)
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