05000315/FIN-2010005-01
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Finding | |
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| Title | Failure to Properly Preplan and Perform Maintenance on Safety-related Equipment |
| Description | The inspectors identified a finding of very low safety significance with an associated NCV of Technical Specification (TS) 5.4.1 for the failure to adequately preplan and perform maintenance on the containment building divider barrier seal in accordance with Regulatory Guide 1.33. Specifically, the work package to perform maintenance on the containment divider barrier seal did not contain sufficient guidance. Consequently, the seal was reinstalled improperly and was unknowingly inoperable on November 30, 2010, when the plant was placed in an operating mode (Mode 4) in which the seal was required to be operable per TS 3.6.13. This issue was entered into the licensees corrective action program as AR 2010-12968.
This finding affected the Barrier Integrity cornerstone and was more than minor because it was sufficiently similar to more than minor example 5.a in IMC 0612, Appendix E, and the issue could adversely affect the cornerstone objective to provide reasonable assurance that the containment protects the public from radionuclide releases caused by accidents or events. This finding was of very low safety significance because the safety function guidelines for core heat removal, inventory control, power availability, containment integrity, and reactivity control were met. This finding is associated with a cross-cutting aspect in the work practices component of the human performance cross-cutting area. Specifically, supervisory and management oversight of work activities were inadequate to ensure the containment divider barrier seal modification was properly installed (H.4 (C)). |
| Site: | Cook  |
|---|---|
| Report | IR 05000315/2010005 Section 1R20 |
| Date counted | Dec 31, 2010 (2010Q4) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | C Zoia J Jandovitz J Lennartz T Go A Garmoe P Laflamme J Cameron A Shaikh |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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Finding - Cook - IR 05000315/2010005 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Cook) @ 2010Q4
Self-Identified List (Cook)
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