6 janvier 2014
Suite à la faille survenue sur le transformateur principal, Le cœur étant critique, les systèmes de protection du réacteur se seraient enclenchés
Type : PWR - Puisssance : 2 900 MWTh - Première divergence : 02 1976
Available in english only.
Event Number : 49697 - Facility : BEAVER VALLEY - State : PA - Unit : [1] - RX Type : [1] W-3-LP,[2] W-3-LP -
Event Date : 01/06/2014 - Event Time : 16:59
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION Person (Organization) : WAYNE SCHMIDT (R1DO)
Initial PWR : 100 % Current PWR : 100 %
Event Text
AUTOMATIC REACTOR TRIP DUE TO MAIN TRANSFORMER FAULT
"At 1659 EST hours on January 6, 2014, Beaver Valley Power Station Unit 1 automatically tripped from 100% power. The cause of the reactor trip was a main transformer differential trip. All rods fully inserted into the core and the plant is stable in Mode 3. All three auxiliary feedwater pumps automatically started as expected. Normal and Emergency Busses are being powered by Offsite Power. The cause of the main transformer differential trip is being investigated. All other equipment functioned as expected. At 1757 EST hours the Emergency Operating Procedures were exited.
"Resident inspector has been notified."
Decay heat is being removed via the turbine bypass valves to the condenser. No primary or secondary safety valves lifted. Unit 2 was unaffected.
Licensee notified the States of Pennsylvania, Ohio, and West Virginia and the Counties of Beaver, PA, Hancock, OH, and Columbiana, OH.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20140107en.html
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