1er septembre 2017
Une des barres était de contrôle et l’autre d’arrêt du réacteur. Toutes les barres de contrôle se sont insérées dans le cœur. Aucune soupape n’a été enclenché durant ce transitoire. La centrale est alimentée par le réseau électrique.
Type : PWR - Puissance : 3 458 MWth - Première divergence : 03 / 1993 -
Available in english only
Event Number : 52945
Facility : COMANCHE PEAK
State : TX Unit : [2] - RX Type : [2] W-4-LP
Event Date : 09/01/2017 - Event Time : 21:40 [CDT]
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
Initial PWR : 100 % Current PWR : 0 %
Event Text
MANUAL REACTOR TRIP DUE TO TWO DROPPED RODS
"At time 2140 [CDT] on September 1, 2017, CPNPP [Comanche Peak Nuclear Power Plant] Unit 2 experienced two (2) dropped rods, one control, one shutdown. The reactor was then manually tripped.
"This event is being reported in accordance with 10CFR50.72(b)(2)(iv)(B) for reactor trip and 10CFR 50.72(b)(3)(iv)(A) for an actuation of auxiliary feedwater.
"Currently Unit 2 is being maintained in Hot Standby (Mode 3) in accordance with Integrated Plant Operating Procedure IP0-007B, Emergency Response Guideline Procedure Network has been exited. Decay Heat is being rejected to the Main Condenser via Steam Dump Valves (Turbine Bypass Valves).
"The NRC Resident Inspector has been notified."
All rods inserted into the core during the trip. No relief or safety valves actuated during the plant transient. The electrical grid is stable and supplying plant loads. Unit 1 was not affected by the transient.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2017/20170905en.html
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