05000237/FIN-2010003-06
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Finding | |
|---|---|
| Title | Failure To Perform An Adequate Inspection of Circulating Water Valve 3-4402-C |
| Description | On January 22, 2010, a finding of very low safety significance was self-revealed for failure to perform an adequate inspection of the grease condition of the 3-4402-C valve actuator HBC gear box, which was contrary to the requirements of MA-AA-723-301,Periodic Inspection of Limitorque Model SMB/SB/SBD-000, Revision 3. No violation of regulatory requirements occurred because valve 3-4402-C 2 Enclosure was a nonsafety-related component. The licensee planned to drill inspection ports into and/or replace the HBC gear boxes for valves 2/3-34403-A(B)(C)(D) and 2/3-34402-A(B)(C)(D) and 2-34402-C and change the preventive maintenance requirement to perform a 12 year mechanical inspection of the HBC gear box. This finding was placed in the licensees corrective action program as IR 1034444, Failure of the 3-4402-C Condenser Inlet Valve. The finding was determined to be more than minor because the finding could be reasonably viewed as a precursor to a significant event. Specifically, valve 3-4402-C acted as an inlet in the circulating water system for the south water box. When the valve failed, it was almost completely closed. Had the valve failed open, circulating water would have been diverted from the condenser potentially causing a loss of vacuum that would have resulted in a reduction in power and/or a turbine trip and reactor trip. The inspectors determined the finding could be evaluated using the SDP in accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Phase 1 - Initial Screening and Characterization of Findings, Table 4a, Initiating Events Cornerstone Column, Transient Initiators question 1, does the finding contribute to both the likelihood of a reactor trip and the likelihood that mitigation equipment or functions will not be available, was answered no, and, therefore, screened as Green. This finding had no cross-cutting aspect due to the issues involved in this valve failure were not indicative of current performance. |
| Site: | Dresden  |
|---|---|
| Report | IR 05000237/2010003 Section 4OA2 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | A Dunlop D Melendez-Colon W Slawinski C Phillips D Reeser B Palagi J Neurauter M Ring J Draper M Learn D Sand R Edwards R Jickling R Schulz J Tapp R Russell |
| INPO aspect | |
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Finding - Dresden - IR 05000237/2010003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Dresden) @ 2010Q2
Self-Identified List (Dresden)
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