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On October 30, 2012 at approximately 1027 … On October 30, 2012 at approximately 1027 hours, Operations personnel identified that Beaver Valley Power Station Unit 2 (BVPS-2) was operating in Mode 3 with both trains of turbine trip actuation relays inoperable. The DC breakers that power the turbine trip actuation relays were open for turbine trip circuitry testing during plant start-up from a refueling outage. Technical Specification (TS) Table 3.3.2-1, Engineered Safety Feature Actuation System Instrum&tation, Function 5.a requires two trains of turbine trip actuation relays in Mode 3 unless the main feedwater lines are isolated and the valves deactivated. The main feedwater lines were isolated, but the valves were not deactivated. TS 3.0.3 was entered as this condition did not meet the requirements of TS Table 3.3.2-1 Function 5.a and no associated action exists for this condition. Also, the requirements of TS 3.0.4 were not met since the plant transitioned from Mode 4 to Mode 3 without meeting the stated exceptions of TS 3.0.4. At approximately 1045 hours, TS 3.3.2 was met and TS 3.0.3 was exited when the main feedwater isolation valves were deactivated in the closed position.</br></br>It was also identified that two similar events occurred at Beaver Valley Power Station Unit 1 (BVPS-1). On May 9, 2012, and October 31, 2010, BVPS-1 entered Mode 3 with the DC breakers that power the turbine trip actuation relays open for turbine trip circuitry testing.</br></br>The root cause was determined to be an inaccurate perception of the applicability of the turbine trip TS in combination with less than adequate information in plant documents. Corrective actions planned include additional training, revisions to procedures, and enhancing plant documents and processes., and enhancing plant documents and processes. +
October 30, 2012 +
On October 30, 2012 at approximately 1027 … On October 30, 2012 at approximately 1027 hours, Operations personnel identified that Beaver Valley Power Station Unit 2 (BVPS-2) was operating in Mode 3 with both trains of turbine trip actuation relays inoperable. The DC breakers that power the turbine trip actuation relays were open for turbine trip circuitry testing during plant start-up from a refueling outage. Technical Specification (TS) Table 3.3.2-1, Engineered Safety Feature Actuation System Instrum&tation, Function 5.a requires two trains of turbine trip actuation relays in Mode 3 unless the main feedwater lines are isolated and the valves deactivated. The main feedwater lines were isolated, but the valves were not deactivated. TS 3.0.3 was entered as this condition did not meet the requirements of TS Table 3.3.2-1 Function 5.a and no associated action exists for this condition. Also, the requirements of TS 3.0.4 were not met since the plant transitioned from Mode 4 to Mode 3 without meeting the stated exceptions of TS 3.0.4. At approximately 1045 hours, TS 3.3.2 was met and TS 3.0.3 was exited when the main feedwater isolation valves were deactivated in the closed position.</br></br>It was also identified that two similar events occurred at Beaver Valley Power Station Unit 1 (BVPS-1). On May 9, 2012, and October 31, 2010, BVPS-1 entered Mode 3 with the DC breakers that power the turbine trip actuation relays open for turbine trip circuitry testing.</br></br>The root cause was determined to be an inaccurate perception of the applicability of the turbine trip TS in combination with less than adequate information in plant documents. Corrective actions planned include additional training, revisions to procedures, and enhancing plant documents and processes., and enhancing plant documents and processes. +
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3 +
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04:45:35, 1 December 2017 +
December 21, 2012 +
October 30, 2012 +
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