silo 3 - U.S. Department of Energy

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Break up compacted material within Silo 3;
Access and Retrieval Strategy for the Silo 3 Project
Document No. 40430-PL-0002, Rev. 1
September 2003
Retrieve miscellaneous debris, such as simple hand tools, PPE, and plastic bags from
the silo; and
Carry and manipulate a hose for pneumatic retrieval, as required, to support mechanical
operations.
4.1.2 RETRIEVAL BIN (HBN-11-5054)
The Retrieval Bin is a rectangular bin located just east of the Silo 3 opening, and is covered
by load-bearing grating that includes a ferrous magnet. The magnet assembly mounts
within the grating system and limits the size and the amount of debris (especially metallic
debris) that would otherwise drop into the Retrieval Bin Discharge Feeder. Debris is
removed from the grating by the Excavator (with appropriate attachments) or manually, if
necessary.
The bin is below-grade and has steep sides that allow it to be used as both a chute and a
hopper. The bin is designed to allow the Excavator to drive over the opening without
damage to either the bin or the grate.
4.1.3 OTHER MRS EQUIPMENT
FDR-11-5106, Retrieval Bin Discharge Feeder, is a variable-speed screw feeder used to
transfer material, at an operator-set rate, from the Retrieval Bin to the Inclined
Conveyor.
DFC-11-5056, Inclined Conveyor, is a pocketed belt conveyor used to transfer material
to the required elevation for packaging.
FDR-11-5 100, Transfer Conveyor, is a constant-speed screw feeder used to transfer
material from the Inclined Conveyor to the Feed Conveyor that feeds material to the
packaging system.
EAR-1 1-5052, Retrieval Bin Hood, and EAR-1 1-5053, Excavator Room Hood, are
exhaust air registers that collect air inside the Excavator Room that is conveyed by
ductwork to the Process Vent System dust collectors.
4.1.4 EXCAVATOR ROOM AND EXCAVATOR SERVICE ROOM
Both the Excavator Room and the Excavator Service Room include the following features:
Provisions for decontamination of the Excavator (i.e., plant air, vacuum, and process
water); and
Trenches and sumps to collect both misting and wash water, and sump pumps to
transfer the water to the Wastewater Tanks.
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