17 mars 2019
Alors que le réacteur n°3 est en fonctionnement, le système d’injection de liquide de refroidissement haute pression (HPCI) a été isolé suite à la découverte d’une fuite côté eau du condenseur sur un presse-étoupe. Le réacteur est alors rentré dans la phase de limitation de fonctionnement - “limiting condition for operation” - jusqu’à réparation avant 14 jours.
Tous les autres système de refroidissement d’urgence du cœur seraient opérationnels.
Type : Fukushima 1 (BWR Mark 1) - Puissance : 3 458 MWrh - Première divergence : 8 / 1976 -
Available in english only
Event Number : 53942
Facility : BROWNS FERRY - State : AL
Unit : [3] - RX Type : [3] GE-4
Event Date : 03/17/2019 - Event Time : 07:35 [CDT]
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Initial PWR : 47 % Current PWR : 47 %
Event Text
HIGH PRESSURE COOLANT INJECTION SYSTEM DECLARED INOPERABLE
"At 0735 CDT on March 17, 2019, the High Pressure Coolant Injection (HPCI) system was isolated due to a water-side leak from the HPCI Gland Seal Condenser. Unit 3 declared the HPCI system Inoperable and entered Technical Specification LCO 3.5.1 Condition C with required actions to verify the Reactor Core Isolation Cooling system is Operable, and to restore the HPCI system to Operable status within 14 days. All other Unit 3 Emergency Core Cooling Systems (ECCS) remain Operable.
"This condition is being reported pursuant to 10 CFR 50.72(b)(3)(V)(D), ’Any event or condition that at the time of discovery could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.’ This is also reportable as a 60-day written report in accordance with 10 CFR 50.73(a)(2)(V)(D).
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified of this event."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/20190318en.html
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