05000482/FIN-2010007-03
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Finding | |
|---|---|
| Title | Inadequate Auxiliary Feedwater Pump Suction Line Break Analysis and Design |
| Description | Green. 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 basis are correctly translated into specifications, drawings, procedures, and instructions. Specifically, as of October 8, 2010, the design calculations associated with the auxiliary feedwater system line break analysis was not consistent with the actual system operation. This finding was entered into the licensees corrective action program as Condition Report 00006250. The team determined that the failure to adequately analyze a postulated failure of the piping from the condensate storage tank to the auxiliary feedwater pumps 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, the design basis analysis did not ensure that the turbine-driven auxiliary feedwater pump would perform its required functions after the failure of nonsafety-related piping from the Chapter 0609.04, Phase 1 - Initial Screening and Characterization of Findings, a significance determination screening was performed and determined this finding was of very low safety significance (Green) because it did not represent a loss of system safety function and did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The licensee\\\'s operability evaluation demonstrated that the auxiliary feedwater system was operable. This finding did not have a crosscutting aspect because the most significant contributor did not reflect current licensee performance. |
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2010007 Section 1R21 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | B Correll C Baron D Strickland J Adams S Kobylarz T Farnholtz |
| INPO aspect | |
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Finding - Wolf Creek - IR 05000482/2010007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Wolf Creek) @ 2010Q4
Self-Identified List (Wolf Creek)
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