05000482/FIN-2007002-02: Difference between revisions
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| identified by = NRC | | identified by = NRC | ||
| Inspection procedure = IP 71111.13 | | Inspection procedure = IP 71111.13 | ||
| Inspector = B Baca, S Cochrum, C Long, E Coffman, G Ryan, P Goldbergb, | | Inspector = B Baca, S Cochrum, C Long, E Coffman, G Ryan, P Goldbergb, Tharakans Cochrum, J Reynoso, C Long | ||
| CCA = N/A for ROP | | CCA = N/A for ROP | ||
| INPO aspect = | | INPO aspect = | ||
| description = During an attempt to open service water pump discharge Valve 1WS0002A on February 8, 2007, a plant operator initially attempted to open the valve with the pump secured but was unsuccessful because the valves manual handwheel was too difficult to turn against the system back pressure. However, Procedure SYS EA-120, Service Water System Startup Revision 40A, states that service water Pump 1WS01PA be started prior to opening the discharge valve to equalize system back pressure. A second attempt to open the valve was made with the service water pump running to decrease differential pressure across the valve. The second attempt was also unsuccessful as the valves handwheel was still too difficult to operate. During the second attempt, the operator placed a wrench across the valvess handwheel to increase leverage and open the valve. The second attempt was not successful in opening the valve and resulted in damage to the handwheel and valve actuator internals due to the excessive torsion caused by using a wrench. Wolf Creek Standing Order 1, Valve Setup and Operation, Revision 37 as well as Enertech (the valve vendor) Procedure PA 97283, Installation, Operation and Maintenance Instructions - Enertech Permaseat Valves, MAK, prohibit the use of a wrench and use of excessive force on the handwheel. Subsequently, the valves restoration position on the tracking document was then changed to closed. The valve was repaired as emergent work and returned to service after approximately 50 hours of being inoperable. The inspectors questioned whether the plant operator used appropriate guidance which resulted in applying excessive torque with a wrench on the valves handwheel. This issue is captured in the licensees corrective action program under Condition Report 2007-000543. Because additional followup is needed to determine the significance, this issue is being treated as an Unresolved Item URI 05000482/2007002-02, use of wrench on manual service water valve handwheel. | | description = During an attempt to open service water pump discharge Valve 1WS0002A on February 8, 2007, a plant operator initially attempted to open the valve with the pump secured but was unsuccessful because the valves manual handwheel was too difficult to turn against the system back pressure. However, Procedure SYS EA-120, Service Water System Startup Revision 40A, states that service water Pump 1WS01PA be started prior to opening the discharge valve to equalize system back pressure. A second attempt to open the valve was made with the service water pump running to decrease differential pressure across the valve. The second attempt was also unsuccessful as the valves handwheel was still too difficult to operate. During the second attempt, the operator placed a wrench across the valvess handwheel to increase leverage and open the valve. The second attempt was not successful in opening the valve and resulted in damage to the handwheel and valve actuator internals due to the excessive torsion caused by using a wrench. Wolf Creek Standing Order 1, Valve Setup and Operation, Revision 37 as well as Enertech (the valve vendor) Procedure PA 97283, Installation, Operation and Maintenance Instructions - Enertech Permaseat Valves, MAK, prohibit the use of a wrench and use of excessive force on the handwheel. Subsequently, the valves restoration position on the tracking document was then changed to closed. The valve was repaired as emergent work and returned to service after approximately 50 hours of being inoperable. The inspectors questioned whether the plant operator used appropriate guidance which resulted in applying excessive torque with a wrench on the valves handwheel. This issue is captured in the licensees corrective action program under Condition Report 2007-000543. Because additional followup is needed to determine the significance, this issue is being treated as an Unresolved Item URI 05000482/2007002-02, use of wrench on manual service water valve handwheel. | ||
}} | }} | ||
Latest revision as of 20:32, 20 February 2018
| Site: | Wolf Creek  |
|---|---|
| Report | IR 05000482/2007002 Section 1R13 |
| Date counted | Jun 30, 2007 (2007Q2) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.13 |
| Inspectors (proximate) | B Baca S Cochrum C Long E Coffman G Ryan P Goldbergb Tharakans Cochrum J Reynoso C Long |
| INPO aspect | |
| ' | |