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An NRC-identified non-cited violation (NCVAn NRC-identified non-cited violation (NCV) of 10 CFR 50, Appendix B, Criterion XVI, Corrective Action, was identified for the licensees failure to implement corrective actions for a condition adverse to quality. The licensee did not develop a calculation to determine the maximum on-site water level resulting from a Probable Maximum Precipitation (PMP) event in a timely manner. Corrective actions included development of a calculation bounding the expected water level resulting from a PMP event. This violation is in the licensees corrective action program (CAP) as PIP O-12-7994. The performance deficiency (PD) was more than minor because it was associated with the Mitigating Systems Cornerstone attribute of Design Control and adversely impacted the cornerstone objective because there was reasonable doubt that plant equipment was adequately protected from the increased water level and therefore had the potential to result in a loss of systems that respond to initiating events to prevent undesirable consequences. The finding was determined to be of very low safety significance (Green) because the licensee subsequently demonstrated that the water entering the plant structures would not have resulted in the loss of safety-related or risk-significant equipment. This finding does not have a cross-cutting aspect because the performance deficiency was not indicative of current plant performance.t indicative of current plant performance.  +
23:59:59, 30 June 2012  +
05000269  +, 05000270  +  and 05000287  +
23:59:59, 30 June 2012  +
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19:05:48, 30 September 2017  +
23:59:59, 30 June 2012  +
Failure to Perform a Calculation to Determine Site PMP Ponding Levels in a Timely Manner  +