05000327/FIN-2011002-04
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Finding | |
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| Title | Inadequate Maintenance Procedures Result in Inoperable Feedwater Regulating Valve |
| Description | A self-revealing non-cited violation of 10 CFR 50 Appendix B Criterion V, Instructions, Procedures, and Drawings, was identified for the failure to provide adequate procedures for maintenance on the Unit 1 loop 3 feedwater regulating valve (FRV). The applicable procedures did not contain adequate guidance to ensure that the valves operability was not adversely affected during reassembly. As a result, the FRV was placed in a condition where it was unable to perform its function of main feedwater isolation as required by TS LCO 3.7.1.6. The licensee entered this issue into their corrective actions program as PERs 284451 and 314771. Corrective actions included revision to the applicable work procedure to ensure no inadvertent valve stem rotation during reassembly. The finding was determined to be greater than minor because it was associated with the procedure quality attribute of the mitigating systems cornerstone and affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, as a result of the maintenance activity, the FRV was placed in a condition where it was unable to perform its required function of main feedwater isolation. Using IMC 0609, Significance Determination Process, Attachment 4, Phase 1 - Initial Screening and Characterization of Findings, the finding was determined to be of very low safety significance (Green) since the finding did not represent an actual loss of safety function of a single train for greater than the associated TS allowed outage time. The cause of this finding was determined to have a cross-cutting aspect in the area of Human Performance associated with the Resources component, in that a complete work package which was adequate to assure nuclear safety was not provided for this maintenance activity. The work procedures did not include guidance to ensure that the operability of the FRV was not adversely affected. H.2(c). |
| Site: | Sequoyah  |
|---|---|
| Report | IR 05000327/2011002 Section 4OA2 |
| Date counted | Mar 31, 2011 (2011Q1) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | R Rodriguez E Guthrie P Higgins C Young M Speck J Montgomery W Deschaine |
| CCA | H.7, Documentation |
| INPO aspect | WP.3 |
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Finding - Sequoyah - IR 05000327/2011002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Sequoyah) @ 2011Q1
Self-Identified List (Sequoyah)
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