Nuclear Regulatory Commission, April 3, 2013: At 1707 CDT on 4/2/13 an arc flash occurred at the ‘B’ safeguards transformer (XMDV24) in the plant switchyard at Callaway [nuclear plant in Missouri]. At the time of the flash, ground straps were being placed on the ‘B’ safeguards transformer which had been removed from service for maintenance. The event resulted in a loss of power to areas/buildings outside the power block. There was no impact to equipment and systems in the plant. Four workers were injured or affected by the flash. The extent of the electrical-related injuries has not been determined. However, based on reports from the scene, all of the workers were conscious and walked away from the scene. One person was transported by helicopter and two by ambulance to a local hospital. [...]
KMIZ: Emergency officials confirm an electrical explosion happened around 5:30 p.m., but the cause is still under investigation. Ameren Missouri said in a written statement that the accident occurred in the switch yard area, but a company spokesman declined to elaborate about what happened. [...] South Callaway Fire, Callaway Ambulance and the plant’s emergency staff responded to the explosion.
KOLR: The company did not provide any details about the nature of the accident or identify the injured workers. But one television report said reported the accident was an electrical explosion and that one of the employees was flown to University Hospital in Columbia for treatment.
KMOV: The company declined to elaborate about what happened. But Callaway County Emergency Management Director Michelle Kidwell said the 911 call reported burn victims, including two with burns to the face. Kidwell said a medical helicopter crew was among the emergency responders dispatched to the nuclear facility located about 25 miles northeast of Jefferson City.
From 3 days ago: U.S. nuclear plant suffers "significant industrial accident" -- 8 injured, 1 dead -- No 'immediate' threat to the public
Published: April 3rd, 2013 at 9:43 am ET