3 octobre 2013
Le personnel d’intervention concernant un incendie qui surviendrait sur l’armoire électrique de contrôle de chacun des 3 réacteurs du site a été découvert insuffisant. Cette insuffisance ne permet pas de respecter les délais de mise en œuvre des procédures imposées par les instructions d’arrêt en sûreté (SSIs) des réacteurs.
Première divergence : n° 1 août 1973 - n° 2 juillet 1974 - n° 3 août 1976 - Puissance : 3 458 MWth - Type : BWR Mark I = Fukushima I
Available in english only.
Event Number : 49406 Facility : BROWNS FERRY - State : AL - Unit : [1] [2] [3] RX Type : [1] GE-4,[2] GE-4,[3] GE-4
Notification Time : 21:10 - Event Date : 10/03/2013 - Event Time : 15:35 Last Update Date : 10/03/2013 Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(ii)(B) - UNANALYZED CONDITION Person (Organization) : DAVID AYRES (R2DO)
Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode 1 N Y 100 Power Operation 100 Power Operation 2 N Y 100 Power Operation 100 Power Operation 3 N Y 100 Power Operation 100 Power Operation
Event Text
INADEQUATE SHIFT STAFFING TO SUPPORT IMPLEMENTATION OF SAFE SHUTDOWN INSTRUCTIONS
"The Browns Ferry Nuclear Plant (BFN) minimum Operations shift staffing was evaluated for response to a fire in the Control Bay that ultimately leads to entry into Appendix R Safe Shutdown Instructions (SSIs). The result of this evaluation revealed that the minimum Operations shift staffing does not provide sufficient staffing to support SSI required staffing levels. In the event of an Appendix R fire, one BFN unit would be without a Senior Reactor Operator to direct the implementation of the time critical manual actions specified in the SSI procedures.
"On October 3, 2013, this condition was determined to be an 8 hour non-emergency report in accordance with 10 CFR 50.72(b)(3)(ii)(B) since sufficient shift staffing levels to implement the SSI procedures in the event of an Appendix R fire were not provided.
"Compensatory measures have been implemented to ensure sufficient shift staffing is provided to implement Appendix R SSIs.
"The event was entered into the licensee corrective action program as Service Request number 788812.
"The NRC Resident Inspector has been notified."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2013/20131004en.html