26 août 2014
Lors de l’échange du logiciel de conduite de la machine d’enrichissement d’uranium, une des 4 vannes d’isolement concernant la sûreté ne s’est pas fermée. Ce problème a été déclaré car il contrevient aux prescriptions de sûreté.
Available in english only.
Event Number : 50384
Facility : PORTSMOUTH AMERICAN CENTRIFUGE - RX Type : URANIUM ENRICHMENT FACILITY - Comments : 2 DEMOCRACY CENTER 6903 ROCKLEDGE DRIVE BETHESDA, MD 20817
Region : 2 - State : OH -
License # : SNM-2011 - Agreement : Y -
Event Date : 08/20/2014 - Event Time : 08:20
Emergency Class : NON EMERGENCY 10 CFR Section : 70.50(b)(2) - SAFETY EQUIPMENT FAILURE
Event Text
AN ISOLATION VALVE DID NOT CLOSE DURING A MAINTENANCE EVOLUTION
"On 8/20/2014, 0820 hrs [EDT], the Plant Shift Superintendent was notified of the following condition :
"During a maintenance evolution to change the machine drive unit (MDU) software, one of the four primary isolation valves comprising the machine isolation valve (MIV) set did not close as required. Specifically, the purge vacuum (PV) isolation valve did not close. All other isolation valves did close as required.
"This event is being reported as a loss or degradation of an IROFS [Item Relied on for Safety] that results in a failure to meet the performance requirements of Section 70.61 [and is reportable per 70.50(b)(2)]."
The licensee will notify the NRC Resident Inspector.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20140821en.html
La boutique
Informez vous