05000354/FIN-2015004-01
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Finding | |
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| Title | Failure to Follow CAP Procedures to Ensure Functionality of the Main Control Room during a Station Blackout |
| Description | The inspectors identified a Green finding because PSEG did not follow procedures to ensure that an identified condition adverse to quality (CAQ) was adequately evaluated, documented, and corrected. Specifically, PSEG identified a CAQ associated with a station blackout (SBO) design calculation used to justify the main control room (MCR) heat load during a loss of ventilation, but failed to adequately evaluate, document and correct the CAQ. This CAQ challenged the reasonable assurance of functionality of the MCR during an SBO event and required PSEG to complete a detailed technical evaluation (TE) to prove functionality was maintained. PSEGs corrective actions included performing a detailed TE to ensure MCR temperatures during an SBO would not have exceeded a functionality limit, and initiating actions to ensure issues identifying a potential CAQ receive the appropriate screening by operators, engineering and management staff. PSEG also revised SBO procedures to ensure the proper electrical loads were included when required to be shed in the event of an SBO event. PSEG documented the issue in the corrective action program (CAP) as Notification (NOTF) 20704285. This finding was more than minor because it was associated with the human performance attribute of the Mitigating Systems cornerstone and adversely affected its objective to ensure the capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the potential existed for the analyzed MCR heat load to be exceeded, affecting the ability of the MCR to remain functional during an SBO event. Additionally, the finding was similar to IMC 0612, Appendix E, examples j and k, in that, a design engineering calculation error resulted in a condition where there was a reasonable doubt of operability of a structure, system, or component (SSC). The finding was screened for significance in accordance with IMC 0609, Appendix A, Significance Determination Process (SDP) for Findings-at-Power, issued June 2, 2012. The finding screened as very low safety significance (Green) using Exhibit 2 for Mitigating Systems Screening Questions, because the finding is a deficiency affecting the design or qualification of a mitigating SSC, but the affected SSC maintains its operability and/or functionality. Specifically, the design calculation error was a CAQ that challenged the reasonable assurance of functionality of the MCR during an SBO event and required a TE to prove functionality of the MCR during an SBO event was maintained. The inspectors determined this finding has a cross-cutting aspect in the area of Problem Identification and Resolution (PI&R), Evaluation, in that PSEG did not thoroughly evaluate the issue to ensure that resolutions address causes and extent of conditions, commensurate with its safety significance. Specifically, issues of concern need to be properly classified, prioritized, and evaluated according to their safety significance, and operability and reportability determinations are developed, when appropriate. In this case, PSEG did not properly classify or evaluate an identified CAQ per their procedures. |
| Site: | Hope Creek  |
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| Report | IR 05000354/2015004 Section 1R15 |
| Date counted | Dec 31, 2015 (2015Q4) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | A Patel E Dipaolo F Bower J Furia J Hawkins R Nimitz R Vadella S Haney N Embert |
| CCA | P.2, Evaluation |
| INPO aspect | PI.2 |
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Finding - Hope Creek - IR 05000354/2015004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Hope Creek) @ 2015Q4
Self-Identified List (Hope Creek)
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