05000305/FIN-2009002-01
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Finding | |
|---|---|
| Title | Potential Debris Could Clog a Drain Credited During Internal Floods |
| Description | A finding of very low safety significance and associated Non-Cited Violation of10 CFR Part 50, Appendix B, Criterion III, Design Control, was identified by the inspectors for the failure to translate the flooding design basis into specifications, procedures, and instructions. Specifically, the licensee failed to control the storage of material in the steam generator blowdown tank room that could potentially clog a floor drain, in an adjoining room, that was credited in a flood analysis. As part of its corrective actions, the licensee removed or secured the material of concern. The finding was determined to be more than minor because it was associated with the Mitigating Systems Cornerstone attribute of Protection Against External Events and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). Specifically, the licensee did not put adequate controls in place to ensure that the drain would performed its credited function to be open and free flowing during an internal flood scenario involving a break in a 4-inchcondensate line. The inspectors evaluated the finding using the Significance Determination Process in accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Phase 1 - Initial Screening and Characterization of Findings, Table 4a, for the Mitigating Systems Cornerstone, dated January 10, 2008.The significance of the finding was determined to be of very low safety significance (Green) because the inspectors answered no to the questions in the Mitigation Systems Cornerstone column. The inspectors did not identify a cross-cutting aspect associated with this finding because the controls over material that could plug the drain should have been implemented when calculation 2005-05708 was completed and incorporated in the flooding design basis in 2005; therefore, this issue was not reflective of current performance |
| Site: | Kewaunee  |
|---|---|
| Report | IR 05000305/2009002 Section 1R06 |
| Date counted | Mar 31, 2009 (2009Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.06 |
| Inspectors (proximate) | J Cassidy M Kunowski S Burton K Barclay D Lawver |
| INPO aspect | |
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Finding - Kewaunee - IR 05000305/2009002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Kewaunee) @ 2009Q1
Self-Identified List (Kewaunee)
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