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The team identified a noncited violation o … The team identified a noncited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for not verifying the adequacy of the design. Specifically, an incorrect pipe break location in the analysis for loss of the condensate storage tank feed to the auxiliary feedwater pumps caused the analysis to be non-conservative for the amount of water available to the auxiliary feedwater pumps. This error provided for more water to be available for use by the auxiliary feedwater pumps than would actually be available if the analysis had identified the correct location of the postulated pipe break. The licensee has entered this finding into their corrective action program as Callaway Action Request CAR 200808674. The failure to meet design control requirements associated with the pipe break analysis with sufficient water to run the auxiliary feedwater pumps prior to switch over to the essential service water system is a performance deficiency. Per Manual Chapter 0612, Appendix E, Section 3, Non-significant Dimensional, Time, Calculation, or Drawing Discrepancies, Example J, this finding is more than minor because the engineering calculation error resulted in a condition where there was a reasonable doubt on the operability of a system or component. Using Manual Chapter 0609, Significance Determination Process Phase 1 screening worksheet, the team determined that the finding was of very low safety significance. There was no actual loss of safety function and the new analysis demonstrated that the auxiliary feedwater pumps would have enough water available from the Condensate Storage Tank prior to switchover to the Essential Service Water system to complete their design function. (Section 1R21.b.2) their design function. (Section 1R21.b.2) +
23:59:59, 30 September 2008 +
23:59:59, 30 September 2008 +
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03:06:44, 30 May 2018 +
23:59:59, 30 September 2008 +
NON-CONSERVATIVE Pipe Break Location for the Condensate Storage Tank Supply to Auxiliary Feedwater Pumps +