14 août 2012
Mise à l’arrêt manuel du réacteur suite à un problème de turbine. Le cœur étant critique, les systèmes de protection du réacteur se sont enclenché.
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Facility : POINT BEACH - Region : 3 State : WI - Unit : [1]
Event Date : 08/14/2012 - Event Time : 20:31 Emergency Class : NON EMERGENCY
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Passage manuel de 100 % de puissance à zéro
Event Text
UNIT 1 MANUALLY TRIPPED IN ANTICIPATION OF AN AUTOMATIC TURBINE TRIP
"Unit 1 Manual Reactor Trip was initiated in anticipation of an auto turbine trip due to operators noticing the turbine governor valves closing in response to an Electro-Hydraulic Control System signal. All Control Rods are fully inserted. The RCS is being cooled by forced flow (reactor coolant pumps). Secondary heat sink is being provided by the condenser steam dumps utilizing the main feedwater system. The auxiliary feedwater system actuated based on low steam generator level, but has since been secured. There were no unexpected (inconsistent with nature of trip) pressure or level transients. Offsite power remains available. No release occurred nor is ongoing. Emergency Core Cooling did not actuate. No unexpected isolations occurred. Emergency Plan entry was not required."
The licensee informed the NRC Resident Inspector.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2012/20120815en.html
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