05000387/FIN-2010003-04: Difference between revisions
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| CCA = P.2 | | CCA = P.2 | ||
| INPO aspect = PI.2 | | INPO aspect = PI.2 | ||
| description = The inspectors identified a Green NCVof 10 CFR 50 Appendix B, Criterion XVI, \"Corrective Action,\" in that PPL failed to identify and properly correct a condition \'adverse to quality (CAO). Specifically, PPL failed to recognize the \"9\" control structure chiller (CSC) trip from May 12, 2010, as a CAO and did not replace the refrigerant lowtemperature cutout switch (RL TCS) despite previous operating experience (OE) demonstrating that the RL TCS experienced setpoint drift following calibration. As an immediate corrective action, PPL entered this NCV into their CAP in addition to replacement of the switch. This finding is more than minor because it affects the equipment performance attribute of the Mitigating System cornerstone and the associated cornerstone objective of ensuring the reliability of systems that respond to initiating events to prevent undesirable consequences. The inspectors evaluated the finding in accordance with IMC 0609 Attachment 04, Phase 1 - \"Initial Screening and Characterization of Findings,\" Table 4a. This finding was of very low safety significance because it did not represent an actual loss of safety function. The inspector determined that this violation has a cross-cutting aspect in the area of Problem Identification and Resolution, Corrective Action Program, in that PPL failed to properly evaluate the problem and its significance and failed to properly classify and prioritize a CAO (P.1 (c)). Specifically, PPL did not classify the initial failure as a CAO because it occurred during post-maintenance testing PPL failed to recognize the potential for the RL TCS to affect the operability of a safety-related component despite prior operating experience with the RTLCS and current PM guidance. As a result, the RL TCS was not replaced leading to a subsequent \"8\" CSC trip on June 28,2010. | | description = The inspectors identified a Green NCVof 10 CFR 50 Appendix B, Criterion XVI, \\\"Corrective Action,\\\" in that PPL failed to identify and properly correct a condition \\\'adverse to quality (CAO). Specifically, PPL failed to recognize the \\\"9\\\" control structure chiller (CSC) trip from May 12, 2010, as a CAO and did not replace the refrigerant lowtemperature cutout switch (RL TCS) despite previous operating experience (OE) demonstrating that the RL TCS experienced setpoint drift following calibration. As an immediate corrective action, PPL entered this NCV into their CAP in addition to replacement of the switch. This finding is more than minor because it affects the equipment performance attribute of the Mitigating System cornerstone and the associated cornerstone objective of ensuring the reliability of systems that respond to initiating events to prevent undesirable consequences. The inspectors evaluated the finding in accordance with IMC 0609 Attachment 04, Phase 1 - \\\"Initial Screening and Characterization of Findings,\\\" Table 4a. This finding was of very low safety significance because it did not represent an actual loss of safety function. The inspector determined that this violation has a cross-cutting aspect in the area of Problem Identification and Resolution, Corrective Action Program, in that PPL failed to properly evaluate the problem and its significance and failed to properly classify and prioritize a CAO (P.1 (c)). Specifically, PPL did not classify the initial failure as a CAO because it occurred during post-maintenance testing PPL failed to recognize the potential for the RL TCS to affect the operability of a safety-related component despite prior operating experience with the RTLCS and current PM guidance. As a result, the RL TCS was not replaced leading to a subsequent \\\"8\\\" CSC trip on June 28,2010. | ||
}} | }} | ||
Latest revision as of 19:40, 20 February 2018
| Site: | Susquehanna  |
|---|---|
| Report | IR 05000387/2010003 Section 1R19 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.19 |
| Inspectors (proximate) | A Rosebrook E Huang E Torres J Bream J Furia J Greives P Finney P Krohn |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
| ' | |