9 septembre 2014
Déclaration faite suite à la découverte de cet évènement qui aurait pu empêcher l’accomplissement de fonctions nécessaires à l’atténuation des conséquences d’un accident. Le problème découvert le 9 septembre aurait été généré 6 jours avant, mais le délais de 72 h pour la remise en état court à partir du moment de sa découverte.
Type : PWR - Puissance : 2 300 MWth - Première divergence : 06/1973
Available in english only.
Event Number : 50440
Facility : TURKEY POINT
State : FL - Unit : [4]
RX Type : [4] W-3-LP
Event Date : 09/09/2014 - Event Time : 19:36
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Initial PWR : 100 % Current PWR : 100 %
Event Text
FAILURE OF THE AUTO-START FEATURE ON TWO CONTAINMENT COOLERS
"This is a non-emergency notification in accordance with 10 CFR 50.72(b)(3)(v)(D) which requires a report when any event or condition at 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.
"On 9/9/14, FPL discovered the automatic feature associated with the swing 4A emergency containment cooling (ECC) unit was inoperable due to a design change inadequacy. During breaker replacement activities performed on 9/3/14, a one hour shutdown action statement pursuant to TS 3.6.2.2.b was exceeded due to two ECC’s being unable to automatically start on an SI [Safety Injection] signal. [This was not known until the 4A was declared inoperable on 9/9/14 at 1936 EDT].
"The 4A ECC was declared inoperable at 1936 EDT on 9/9/14, and in accordance with TS 3.6.2.2.a, must be returned to OPERABLE status within 72 hours from the time of discovery."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20140911en.html#en50440
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