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The team identified a Green noncited viola … The team identified a Green noncited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, which states, in part, that measures shall be established to assure that applicable regulatory requirements and the design bases are correctly translated into specifications, drawings, procedures, and instructions. Specifically, as of October 4, 2011, the licensee extrapolated the values for required pump net positive suction head beyond those provided in vendor certified curves without adequate analysis or justification. Consequently, the licensee, per the station-approved net positive suction head analysis, could have operated the safety-related pumps in beyond-analyzed or vendor-approved flow regimes. This finding was entered into the licensees corrective action program as Condition Report CR-WF3-2011-06870. The team determined that the failure to provide adequate justification for extrapolation of net positive suction head values beyond those provided in the certified pump vendor data was a performance deficiency. This finding was more than minor because it was associated with the design control attribute of the Mitigating Systems Cornerstone and affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, potential pump cavitation at higher than analyzed or vendor-approved operation, could have rendered mitigating equipment (i.e., pumps) to fail. In accordance with NRC Inspection Manual Chapter 0609, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, the issue was determined to have very low safety significance (Green) because it was a design deficiency confirmed not to result in loss of operability or functionality. Specifically, the licensee performed additional analyses to assure that the pumps could safely operate in the required flow regimes. This finding did not have a crosscutting aspect because the most significant contributor did not reflect current licensee performanced not reflect current licensee performance
23:59:59, 31 December 2011 +
23:59:59, 31 December 2011 +
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19:06:50, 30 September 2017 +
23:59:59, 31 December 2011 +