05000397/FIN-2010002-01
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Finding | |
|---|---|
| Title | Failure to maintain reactor core isolation cooling turbine bearing oil level in accordance with the applicable operating procedure requirements |
| Description | The inspectors identified a noncited violation of Technical Specification 5.4.1.a for a failure to maintain reactor core isolation cooling turbine bearing oil level in the proper band in accordance with procedural requirements. Not documenting oil additions to the reactor core isolation cooling turbine per paragraph 8.0 of PPM 10.2.13, Approved Lubricants, caused a high oil level on the inboard and outboard bearing housings resulting in the reactor core isolation cooling system becoming inoperable on December 20, 2009. Corrective actions for this issue included restoring oil level in the green band and initiating interim actions at the prompting of the resident inspectors to maintain proper oil level. This finding was more than minor because it was associated with the equipment performance attribute of the Mitigating Systems cornerstone and because it affects the associated cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using Manual Chapter 0609, Phase 1 Initial Screening and Characterization of Findings, the inspectors determined that the finding was of very low risk significance (Green) because failure to maintain the reactor core isolation cooling system oil level in the proper band did not result in the loss of a safety function of a single train for greater than its technical specification allowed outage time. In addition, the finding would not have likely affected other mitigating systems resulting in a total loss of their safety function. This finding has a cross-cutting aspect in the area of human performance with a work practices component H.4.b |
| Site: | Columbia  |
|---|---|
| Report | IR 05000397/2010002 Section 1R12 |
| Date counted | Mar 31, 2010 (2010Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | P Goldberg R Cohen W Walker M Hayes E Ruesch |
| CCA | H.8, Procedure Adherence |
| INPO aspect | WP.4 |
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Finding - Columbia - IR 05000397/2010002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Columbia) @ 2010Q1
Self-Identified List (Columbia)
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