05000282/FIN-2014005-01
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Finding | |
|---|---|
| Title | Failure to Implement the Winter Plant Operation Procedure |
| Description | The inspectors identified a finding of very low safety significance and a NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures and Drawings, on December 4, 2014, due to the licensees failure to follow procedure during the performance of test procedure (TP) 1637, Winter Plant Operation. Specifically, maintenance personnel failed to comply with a step within TP 1637 which directed that a tent and heater be installed around the Unit 2 cooling water (CL) discharge to grade header to prevent ice buildup and subsequent blockage during freezing conditions. Consequently, the inspectors identified ice buildup on the CL header discharge orifice which if left uncorrected, could result in header blockage and subsequent inoperability. Corrective actions for this issue included removing the ice buildup on the cooling water discharge header, installing a tent and heater in accordance with TP 1637, revising the associated procedures and performing an apparent cause evaluation. The inspectors determined that this issue impacted the Mitigating Systems cornerstone and was more than minor because if left uncorrected, this issue could become a more significant safety concern. Specifically, with freezing conditions present coupled with the existence of leakage and resultant ice buildup on 20CL61, the potential existed for subsequent ice blockage if left uncorrected and resultant inoperability of the cooling water system. This issue was of very low safety significance because each question provided in IMC 0609, Appendix A, Exhibit 2, Mitigating Systems Screening Questions, was answered No. The inspectors concluded that this finding was associated with a conservative bias cross cutting aspect in the human performance cross cutting area. Specifically, operations and maintenance personnel did not utilize prudent decision making practices to ensure the cooling water header was adequately protected against freezing conditions (H.14). |
| Site: | Prairie Island  |
|---|---|
| Report | IR 05000282/2014005 Section 1R01 |
| Date counted | Dec 31, 2014 (2014Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.01 |
| Inspectors (proximate) | B Boston B Jose D Mcneil D Passehl J Beavers J Bozga K Riemer K Stoedter M Holmberg M Phalen P Laflamme R Elliott V Meghani |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Prairie Island - IR 05000282/2014005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Prairie Island) @ 2014Q4
Self-Identified List (Prairie Island)
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