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On June 15, 2005 at 1400 PDT Columbia Gene … On June 15, 2005 at 1400 PDT Columbia Generating Station experienced a Reactor Protection System (RPS) actuation while operating at full power. Currently, reactor level is being controlled with the feedwater system and reactor pressure is being controlled via the turbine bypass valves to the condenser. All safety systems functioned as expected and there was no ECCS system injection. The initial attempt to trip the main turbine from the control room was unsuccessful and it was subsequently tripped locally. At this time the plant is stable and indications show that the RPS actuation originated from closure of turbine throttle valves. Determination of the cause of the RPS actuation is ongoing at this time.</br>All rods fully inserted and no relief valves lifted. </br>The NRC Resident Inspector was notified.
The NRC Resident Inspector was notified. +
21:00:00, 15 June 2005 +
41,779 +
18:38:00, 15 June 2005 +
21:00:00, 15 June 2005 +
On June 15, 2005 at 1400 PDT Columbia Gene … On June 15, 2005 at 1400 PDT Columbia Generating Station experienced a Reactor Protection System (RPS) actuation while operating at full power. Currently, reactor level is being controlled with the feedwater system and reactor pressure is being controlled via the turbine bypass valves to the condenser. All safety systems functioned as expected and there was no ECCS system injection. The initial attempt to trip the main turbine from the control room was unsuccessful and it was subsequently tripped locally. At this time the plant is stable and indications show that the RPS actuation originated from closure of turbine throttle valves. Determination of the cause of the RPS actuation is ongoing at this time.</br>All rods fully inserted and no relief valves lifted. </br>The NRC Resident Inspector was notified.
The NRC Resident Inspector was notified. +
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