This was a electrical explosion plain and clear.
Prettifying equipment failures: I now don't trust these guys...
So it looked and sounded and they entered a explosion classification procedure....but its actually rapid combustion. Only in a nuclear plant. They are they too timid to put the truth down on paper. How widespread is prettifying documents at Palo Verde?
I think it demeans the people who had to respond to this and the potential they all face in a power plant
As a result, an Emergency Classification of HU2.2, EXPLOSION was declared due to the Load Center breaker failure and noise and visible indication observed in the field.
Power Reactor Event Number: 51403 Facility: PALO VERDE
Region: 4 State: AZ
Unit: [ ] [2] [ ]
RX Type: [1] CE,[2] CE,[3] CE
NRC Notified By: ROBERT PIERCE
HQ OPS Officer: JEFF HERRERANotification Date: 09/17/2015
Notification Time: 02:53 [ET]
Event Date: 09/16/2015
Event Time: 23:01 [MST]
Last Update Date: 09/17/2015Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLAREDPerson (Organization):
THOMAS FARNHOLTZ (R4DO)
WILLIAM GOTT (IRD)
MARC DAPAS (RA)
SCOTT MORRIS (NRR)
WILLIAM DEAN (NRR)
Event Text
Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode 2 N Y 100 Power Operation 100 Power Operation
NOTIFICATION OF UNUSUAL EVENT DUE TO RAPID COMBUSTION OF A LOAD CENTER BREAKER
"The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event, or alters the information being provided at this time a follow-up notification will be made via the ENS or under the reporting requirements of 10CFR50.73.
"Non Class Load Center Breaker, 2ENGN-L04 failed, resulting an a visible observation of rapid combustion and resultant charring (burned area) of the breaker enclosure and housing. No physical deformation to the breaker housing or surrounding area has been identified. The rapid combustion self-extinguished immediately following the audible and visible combustion event. As a result, an Emergency Classification of HU2.2, EXPLOSION was declared due to the Load Center breaker failure and noise and visible indication observed in the field.
"The plant was, and continues to operate at 100% full power operations on normal power alignment. The 2ENGN-L04 Non-Class Load Center breaker supplies power to non-essential service loads and has no immediate impact to plant operation or safety mitigating systems. The plant remains stable and the event did not adversely affect the safe operation of the plant or health and safety of the public.
"The NRC Resident Inspector has been notified."
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