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At approximately 0633 AM on February 28, 2 … At approximately 0633 AM on February 28, 2007, control room operators manually initiated a reactor trip after observing decreasing steam generator levels as a result of low feed water flow. Control room alarms indicated low main feed water pump suction pressure which was subsequently, attributed to a malfunction of the main feed water pump low suction pressure cutback pressure transmitter (PT-408B) on the common main feed pump water supply header. The malfunction of the main feed pump water low suction cutback pressure transmitter resulted in a cutback of both main feed water pumps reducing main feed water flow to the steam generators and causing decreasing steam generator levels. </br>All control rods fully inserted and all safety systems responded as expected. The auxiliary feedwater system actuated as expected from low steam generator levels which occurs as a result of a full power reactor trip. The emergency diesel generators (EDGs) did not start as offsite power remained available. The plant was stabilized in hot shutdown with the (Auxiliary Feedwater System) providing decay heat removal via the main condenser. The main feed water pumps are shutoff and secured. </br>The event is under investigation and a post trip review is being conducted. A courtesy call to stakeholders will be made.</br>All EDGs remain available in standby. No steam generator Power Operated Relief Valves or Main Steam Safety Valves lifted. </br>The licensee notified state and will notify local authorities. The licensee plans to issue a press release. The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
11:35:00, 28 February 2007 +
43,199 +
10:01:00, 28 February 2007 +
11:35:00, 28 February 2007 +
At approximately 0633 AM on February 28, 2 … At approximately 0633 AM on February 28, 2007, control room operators manually initiated a reactor trip after observing decreasing steam generator levels as a result of low feed water flow. Control room alarms indicated low main feed water pump suction pressure which was subsequently, attributed to a malfunction of the main feed water pump low suction pressure cutback pressure transmitter (PT-408B) on the common main feed pump water supply header. The malfunction of the main feed pump water low suction cutback pressure transmitter resulted in a cutback of both main feed water pumps reducing main feed water flow to the steam generators and causing decreasing steam generator levels. </br>All control rods fully inserted and all safety systems responded as expected. The auxiliary feedwater system actuated as expected from low steam generator levels which occurs as a result of a full power reactor trip. The emergency diesel generators (EDGs) did not start as offsite power remained available. The plant was stabilized in hot shutdown with the (Auxiliary Feedwater System) providing decay heat removal via the main condenser. The main feed water pumps are shutoff and secured. </br>The event is under investigation and a post trip review is being conducted. A courtesy call to stakeholders will be made.</br>All EDGs remain available in standby. No steam generator Power Operated Relief Valves or Main Steam Safety Valves lifted. </br>The licensee notified state and will notify local authorities. The licensee plans to issue a press release. The licensee notified the NRC Resident Inspector.ensee notified the NRC Resident Inspector. +
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