05000440/FIN-2009003-03
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Finding | |
|---|---|
| Title | Inability to Operate the RHR Common Suction Line Valve |
| Description | A finding of very low safety significance and associated NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was self-revealed for the failure to implement the requirements of licensee Normal Operating ProcedureNOP-OP-1014, Plant Status Control, Revision 00. Specifically, operations personnel used a mechanical advantage device to increase the closing force on residual heat removal (RHR) valve 1E12F0010 without evaluating the affect on the valve. The increased closing force, i.e. increased torque, sheared the stem for valve 1E12F0010, preventing the valve from opening and preventing the plant from entering shutdown cooling. As part of their immediate corrective actions, licensee personnel repaired the valve stem operator to restore RHR shutdown cooling and entered the issue into their corrective action program. The finding was determined to be more than minor because the finding was associated with the Initiating Events cornerstone attribute of equipment performance and affected the cornerstone objective to limit the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown operations. Specifically, the failure of the RHR shutdown cooling common suction isolation valve caused both trains of shutdown cooling to be unavailable during shutdown operations. Using IMC 0609, Appendix G, Shutdown Operation Significance Determination Process, Checklist 7, the inspectors determined that the finding did not require a Phase 2 or Phase 3 analysis because the plant had appropriately met the safety function guidelines for core heat removal, inventory control, power availability, containment integrity, and reactivity control. The issue did not need a quantitative assessment and screened as having very low safety significance using Figure 1. This finding has a cross-cutting aspect in the area of human performance, work practices, per IMC 0305 H.4(c) because the licensee did not ensure adequate supervisory and management oversight of work activities to ensure nuclear safety. Specifically, supervisors were aware of the use of mechanical advantage devices on the RHR shutdown cooling common suction manual isolation valve and did not ensure an appropriate evaluation was conducted |
| Site: | Perry  |
|---|---|
| Report | IR 05000440/2009003 Section 1R20 |
| Date counted | Jun 30, 2009 (2009Q2) |
| Type: | NCV: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | M Wilk M Marshfield M Phalen D Jones M Franke J Bashore R Leidy J Cameron R Murray C Tilton J Coroju-Sandin |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
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Finding - Perry - IR 05000440/2009003 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Perry) @ 2009Q2
Self-Identified List (Perry)
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