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On November 9, 2001, leak testing of Press … On November 9, 2001, leak testing of Pressure Isolation Valve (PIV) El 1 00F050A, Division 1 Residual Heat Removal (RHR)/Low Pressure Coolant Injection (LPCI) System injection line inboard isolation check valve, was performed in accordance with Technical Specification (TS) Surveillance Requirement SR 3.4.5.1. The resultant leak rate was determined to be in excess of the specified leakage criteria of 10 gpm. The valve and its air-operated test actuator were disassembled and inspected. It was determined that the disk was being prevented from fully closing by the actuator. The cause of the failure of the disk to fully close was determined to be improper reassembly of the actuator during the previous refueling outage because of inadequate craft skills and insufficient craft supervision during this period. The actuator was rebuilt properly, the soft seat was replaced and the valve was successfully leak rate tested. The opposite division counterpart, E1100F050B, successfully passed its as-found leak test this outage; however, it was also disassembled, inspected, and its soft seat replaced.</br></br>With both actuators properly assembled, and with new soft seats installed, historical performance indicates that both valves should pass their as-found leak rate tests at the end of the next operating cycle.ts at the end of the next operating cycle. +
On November 9, 2001, leak testing of Press … On November 9, 2001, leak testing of Pressure Isolation Valve (PIV) El 1 00F050A, Division 1 Residual Heat Removal (RHR)/Low Pressure Coolant Injection (LPCI) System injection line inboard isolation check valve, was performed in accordance with Technical Specification (TS) Surveillance Requirement SR 3.4.5.1. The resultant leak rate was determined to be in excess of the specified leakage criteria of 10 gpm. The valve and its air-operated test actuator were disassembled and inspected. It was determined that the disk was being prevented from fully closing by the actuator. The cause of the failure of the disk to fully close was determined to be improper reassembly of the actuator during the previous refueling outage because of inadequate craft skills and insufficient craft supervision during this period. The actuator was rebuilt properly, the soft seat was replaced and the valve was successfully leak rate tested. The opposite division counterpart, E1100F050B, successfully passed its as-found leak test this outage; however, it was also disassembled, inspected, and its soft seat replaced.</br></br>With both actuators properly assembled, and with new soft seats installed, historical performance indicates that both valves should pass their as-found leak rate tests at the end of the next operating cycle.ts at the end of the next operating cycle. +
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