12 mars 2013
Arrêt automatique du réacteur suite à un dépassement du niveau thermique de référence basse pression. Le cœur étant critique, les système de protection du réacteur ont été enclenchés.
Première divergence : avril 1976 - Puissance nette : 839 MW - Type : PWR -
Available in english only.
Event Number : 48818
Facility : SAINT LUCIE - State : FL -
Unit : [1] - RX Type : [1] CE
Event Date : 03/12/2013 - Event Time : 14:51
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Initial PWR 100 % Current PWR 0 % Hot Standby
Event Text AUTOMATIC REACTOR TRIP ON THERMAL MARGIN/LOW PRESSURE
"On 3/12/13 at 1451 EDT, during normal full power operations, Unit 1 automatically tripped due to the Thermal Margin/ Low Pressure trip setpoint being exceeded. The trip was uncomplicated and all CEAs [control element assembly] fully inserted when the reactor was tripped. Main Steam Safety valves lifted momentarily post trip and reseated. No automatic safety system actuations were required and none occurred. The cause and details of the automatic trip are under investigation.
"The plant is stable in Mode 3 at normal operating temperature and pressure. RCS Heat Removal is being maintained with Main Feedwater and Atmospheric Dump Valves in operation. The operation of the Steam Bypass Control System is under review by Engineering. The Offsite power grid is available and stable."
The licensee has notified the NRC Resident Inspector and there was no impact on Unit 2.
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