05000317/FIN-2012007-01
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Finding | |
|---|---|
| Title | Inadequate Cooling Verification for Containment Spray Pumps |
| Description | The team identified a finding of very low safety significance involving a non-cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, in that Constellation did not ensure that design control measures verified or checked the adequacy of design of the containment spray (CS) pump cooling systems. Specifically, the team determined that the seal cooling units installed on the CS pumps would not provide sufficient cooling to the seals, there were discrepancies in the installed configuration of the bearing cooling system for the pumps, and calculations or test results were not available to demonstrate adequate cooling for the pump bearings at design basis accident conditions. Constellation entered these issues into their corrective action program, and performed operability determinations on the cooling systems. Constellation concluded that the systems were operable but degraded. The finding was more than minor because it was associated with the design control attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The team evaluated the finding in accordance with IMC 0609, Significance Determination Process, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, and determined the finding was of very low safety significance (Green) because it was a design or qualification deficiency confirmed not to result in loss of operability or functionality. This finding did not have a cross-cutting aspect because the most significant contributor of the performance deficiency was not reflective of current licensee performance. |
| Site: | Calvert Cliffs  |
|---|---|
| Report | IR 05000317/2012007 Section 1R21 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.21 |
| Inspectors (proximate) | K Mangan M Patel S Pindale W Sherbin S Kobylarz L Doerflein E Keighley |
| INPO aspect | |
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Finding - Calvert Cliffs - IR 05000317/2012007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Calvert Cliffs) @ 2012Q2
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