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During routine weekly operation of High Pr … During routine weekly operation of High Pressure Coolant Injection (HPCI) Auxiliary Oil Pump (AOP), 2E41C002-3, the pump displayed indications of excessive motor current after the pump had been inservice for approximately 45 minutes. The pump was secured and, following review of electrical diagrams and consultation with Electrical Maintenance, the operating current of the AOP was checked and determined to be excessive. The AOP was declared inoperable, with the AOP inoperable, the HPCI system cannot be considered operable. The HPCI System is a single train ECCS system. Investigation into the cause of the high motor current is ongoing.</br>All other Emergency Core Cooling Systems are fully operable including Reactor Core Isolation Cooling (RCIC). </br>The NRC Resident Inspector was notified of this event by the licensee.</br>*** UPDATE FROM A. DISMUKE TO J. KNOKE AT 0933 ON 07/21/06 ***</br>Retraction of NRC Event # 42657: After further review and evaluation it has been determined that the eight hour call made June 21, 2006 per the guidance of 50.72(b)(3)(v)(D) should be retracted.</br>On 06/21/2006 at approximately 0015 EDT, Unit 2 was at 100 percent Rated Thermal Power. During routine weekly operation of the High Pressure Coolant Injection (HPCI) Auxiliary Oil Pump, 2E41-C002-3, the pump displayed indications of excessive motor current after the pump had been in-service for approximately 45 minutes. Investigation revealed the running amps to be 46 amps with nameplate data running amps shown as 27 amps.</br>An evaluation was performed for the as-found condition that considered the cause and effects of the increased running amps on the ability of the auxiliary oil pump to perform its design function. Specifically, the effect of a shunt resistor short to open was reviewed. Areas reviewed for impact were motor speed, system over pressurization, motor insulation, Environmental Qualification, and motor service life. The results of the evaluation showed that significant margin existed to ensure the auxiliary oil pump design function was maintained. Therefore, the auxiliary oil pump operability was maintained and HPCI operability was also maintained. The HPCI system was immediately removed from service using normal plant procedures; a work order initiated, and the existing motor was replaced to ensure continued long term reliability.</br>The licensee notified the NRC Resident Inspector. Notified R2DO (Ernstes)sident Inspector. Notified R2DO (Ernstes)
04:15:00, 21 June 2006 +
42,657 +
02:36:00, 21 June 2006 +
04:15:00, 21 June 2006 +
During routine weekly operation of High Pr … During routine weekly operation of High Pressure Coolant Injection (HPCI) Auxiliary Oil Pump (AOP), 2E41C002-3, the pump displayed indications of excessive motor current after the pump had been inservice for approximately 45 minutes. The pump was secured and, following review of electrical diagrams and consultation with Electrical Maintenance, the operating current of the AOP was checked and determined to be excessive. The AOP was declared inoperable, with the AOP inoperable, the HPCI system cannot be considered operable. The HPCI System is a single train ECCS system. Investigation into the cause of the high motor current is ongoing.</br>All other Emergency Core Cooling Systems are fully operable including Reactor Core Isolation Cooling (RCIC). </br>The NRC Resident Inspector was notified of this event by the licensee.</br>*** UPDATE FROM A. DISMUKE TO J. KNOKE AT 0933 ON 07/21/06 ***</br>Retraction of NRC Event # 42657: After further review and evaluation it has been determined that the eight hour call made June 21, 2006 per the guidance of 50.72(b)(3)(v)(D) should be retracted.</br>On 06/21/2006 at approximately 0015 EDT, Unit 2 was at 100 percent Rated Thermal Power. During routine weekly operation of the High Pressure Coolant Injection (HPCI) Auxiliary Oil Pump, 2E41-C002-3, the pump displayed indications of excessive motor current after the pump had been in-service for approximately 45 minutes. Investigation revealed the running amps to be 46 amps with nameplate data running amps shown as 27 amps.</br>An evaluation was performed for the as-found condition that considered the cause and effects of the increased running amps on the ability of the auxiliary oil pump to perform its design function. Specifically, the effect of a shunt resistor short to open was reviewed. Areas reviewed for impact were motor speed, system over pressurization, motor insulation, Environmental Qualification, and motor service life. The results of the evaluation showed that significant margin existed to ensure the auxiliary oil pump design function was maintained. Therefore, the auxiliary oil pump operability was maintained and HPCI operability was also maintained. The HPCI system was immediately removed from service using normal plant procedures; a work order initiated, and the existing motor was replaced to ensure continued long term reliability.</br>The licensee notified the NRC Resident Inspector. Notified R2DO (Ernstes)sident Inspector. Notified R2DO (Ernstes)
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100 +
00:00:00, 21 July 2006 +
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22:38:24, 24 September 2017 +
02:36:00, 21 June 2006 +
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04:15:00, 21 June 2006 +
High Pressure Coolant Injection (Hpci) Declared Inoperable Due Excessvie Aux Oil Pump Motor Current +
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