At approximately
0142 hours0.00164 days <br />0.0394 hours <br />2.347884e-4 weeks <br />5.4031e-5 months <br /> on 6/21/2007, during Solid Waste
Uranium Recovery (SWUR) operations, a sequencing problem caused a cardboard box containing combustible waste with about [Deleted]
U-235 to be fed on top of a closed feed hopper door. As the equipment cycled the incinerator fire door, the box, which was on top of the feed hopper door ignited. The box was inside the feed hopper containment shroud when it ignited. The integrity of the containment shroud remained intact during the fire. However, some smoke did escape into the room.
Operational personnel put out the fire (a single box of 3.5 cubic feet) using a hand held fire extinguisher.
The plant emergency response team (PERT) was activated via plant paging system at 0145 and the Richland Fire Department was called. The Richland Fire Department arrived at 0155. With appropriate PPE (SCBA), two PERT and two Richland Fire Fighters entered the facility and confirmed that the fire had been previously extinguished.
The SWUR process is currently shut down and will remain down pending investigation and completion of appropriate corrective actions.
The fire was limited to a single 3.5 cubic foot box containing [Deleted] U-235. All facility HEPA filters remained undamaged during the event.
There was no release of radioactive materials. All areas surveyed after the fire was extinguished were free of radioactive contamination. The individuals that put out the fire and the individuals that subsequently entered the area to confirm that the fire had been extinguished were evaluated for internal contamination with negative results.