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On July 17 2012, at 1118 (EDT), Nine Mile … On July 17 2012, at 1118 (EDT), Nine Mile Point Unit 1 experienced an automatic reactor scram due to high neutron flux as measured by the Average Power Range Monitoring system. The cause is currently under investigation. All control rods fully inserted and all plant systems responded per design following the scram. The High Pressure Coolant Injection (HPCI) system, which is an operating mode of the feedwater system, initiated as expected. There were no planned activities in progress at the time which could have contributed to the event.</br>Nine Mile Point Unit 1 is currently in Hot Shutdown, with reactor water level and pressure maintained within normal bands. Decay heat is being removed via steam to the main condenser using the bypass valves. The offsite grid is stable with no grid restrictions or warnings in effect. All emergency power sources are available in standby. </br>The unit is currently implementing post scram recovery procedures.</br>This was an uncomplicated Reactor Scram and the plant is stable with normal levels, temperature, and pressure. Offsite power is in a normal alignment. HPCI has been secured and returned to normal alignment. The cause to the high neutron flux is still under investigation. This event had no impact on Unit 2.</br>The licensee has informed the NRC Resident Inspector and State Authorities. Resident Inspector and State Authorities. +
15:18:00, 17 July 2012 +
48,110 +
13:23:00, 17 July 2012 +
15:18:00, 17 July 2012 +
On July 17 2012, at 1118 (EDT), Nine Mile … On July 17 2012, at 1118 (EDT), Nine Mile Point Unit 1 experienced an automatic reactor scram due to high neutron flux as measured by the Average Power Range Monitoring system. The cause is currently under investigation. All control rods fully inserted and all plant systems responded per design following the scram. The High Pressure Coolant Injection (HPCI) system, which is an operating mode of the feedwater system, initiated as expected. There were no planned activities in progress at the time which could have contributed to the event.</br>Nine Mile Point Unit 1 is currently in Hot Shutdown, with reactor water level and pressure maintained within normal bands. Decay heat is being removed via steam to the main condenser using the bypass valves. The offsite grid is stable with no grid restrictions or warnings in effect. All emergency power sources are available in standby. </br>The unit is currently implementing post scram recovery procedures.</br>This was an uncomplicated Reactor Scram and the plant is stable with normal levels, temperature, and pressure. Offsite power is in a normal alignment. HPCI has been secured and returned to normal alignment. The cause to the high neutron flux is still under investigation. This event had no impact on Unit 2.</br>The licensee has informed the NRC Resident Inspector and State Authorities. Resident Inspector and State Authorities. +
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