1er août 2017
Lors de la planification d’un test, la vanne d’isolation de vapeur du circuit d’injection de liquide de refroidissement haute pression a été trouvée en mauvaise position .
La cause du défaut qui aurait empêché la réalisation d’une fonction de sécurité est en cours de recherche.
Type : Fukushima 1 (BWR Mark 1) - Puissance : 1 912 MWth - Première divergence : 03 / 1974 -
Available in english only
Event Number : 52881
Facility : DUANE ARNOLD
State : IA Unit : [1] - RX Type : [1] GE-4
Event Date : 08/01/2017 - Event Time : 09:34 [CDT]
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Initial PWR 99 % Current PWR 99 %
Event Text HIGH PRESSURE COOLANT INJECTION STEAM SUPPLY VALVE FAILED TO REPOSITION
"At 0934 CDT, while appropriately removed from service for pre-planned testing, the High Pressure Coolant Injection (HPCI) inboard steam isolation valve, MO-2238, valve position indication was found to be inadequate. As a result, MO-2238 was declared inoperable in accordance with Technical Specification (TS) 3.6.1.3. This resulted in a condition that caused the HPCI system to be inoperable.
"The cause of the inadequate valve position indication is currently being investigated. This report is being made pursuant to 10 CFR 50.72(b)(3)(v)(D).
"The NRC Resident Inspector has been informed."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2017/20170802en.html
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