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Etats-Unis : Browns Ferry : perte de l’injection de liquide de refroidissement haute pression du coeur du réacteur n°1




13 October 2017


L’indisponibilité de ce système unique, prévu pour l’atténuation des conséquences d’un accident, a été identifiée suite au repérage d’une fuite sur le refroidisseur d’huile de lubrification et le joint du presse étoupe.

 Type : Fukushima 1 (BWR Mark 1) - Puissance : 3 458 MWth - Première divergence : 8 / 1973 -

Available in english only


Event Number: 53014

Facility: BROWNS FERRY - State: AL

Unit: [1] - RX Type: [1] GE-4

Event Date: 10/13/2017 - Event Time: 17:00 [CDT]

Emergency Class: NON EMERGENCY 10 CFR Section: 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION

Initial PWR : 0 % - Current PWR : 100 % -

Event Text ACCIDENT MITIGATION - HIGH PRESSURE COOLANT INJECTION DECLARED INOPERABLE

"On October 13, 2017 at 1700 CDT, Unit 1 High Pressure Coolant Injection (HPCI) was declared Inoperable due to discovery of a leak on a sensing line to 1-PCV-073-0043, Lube Oil Cooler & Gland Seal Condenser Pressure Control Valve. The leak is a steady stream located where the sense line connects to the valve.

"This constitutes an unplanned HPCI System inoperability and requires an 8 hour ENS notification in accordance with 10 CFR 50.72(b)(3)(v)(D), due to the failure of a single train system affecting accident mitigation and a 60 day written report in accordance with 10 CFR 50.73(a)(2)(v)(D)."

The NRC Resident Inspector has been notified by the Licensee.

https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2017/20171016en.html