05000373/FIN-2013005-05
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Finding | |
|---|---|
| Title | Failure to Maintain a Testing Program That Ensured RCIC Components Will Perform Satisfactorily in Service |
| Description | The inspectors identified a finding of very low safety significance (Green) and associated non-cited violation of 10 CFR Part 50, Appendix B, Criterion XI, Test Control, for the licensees failure to ensure that the surveillance testing program was sufficient to demonstrate that safety-related reactor core isolation cooling (RCIC) system components would perform satisfactorily in service. Specifically, the Unit 1 and Unit 2 RCIC steam supply differential pressure switches were not tested at a frequency that assured that they could perform satisfactorily in service, as evidenced by the repeated failures of the components at their quarterly surveillance interval. Corrective actions included the adjustment of the testing periodicity to 46 days, and accelerating the timeline for switch design replacements to address the water intrusion issue. The inspectors determined the finding could be evaluated using the significance determination process (SDP) in accordance with Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process for Findings At-Power, Exhibit 2, dated June 19, 2012. The inspectors reviewed the Mitigating Systems screening questions in Appendix A, Exhibit 2 and answered No to all the questions, which screened the issue as Green. This finding had a cross-cutting aspect in the area of Problem Identification and Resolution, Corrective Action Program, for the failure to take appropriate corrective actions to address adverse trends in a timely manner. Specifically, in the three-year period from September 2010 to October 2013, these switches failed their surveillances 18 times, primarily due to water intrusion into the switch housing, and corrective actions to increase the frequency or address the water intrusion problem were not taken in a timely manner, commensurate with the safety significance of the issue. |
| Site: | LaSalle  |
|---|---|
| Report | IR 05000373/2013005 Section 4OA2 |
| Date counted | Dec 31, 2013 (2013Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | B Palagi F Ramirez J Cassidy J Laughlin M Kunowski R Baker R Ruiz R Schulz T Go |
| Violation of: | 10 CFR 50 Appendix B Criterion XI |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - LaSalle - IR 05000373/2013005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (LaSalle) @ 2013Q4
Self-Identified List (LaSalle)
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