silo 3 - U.S. Department of Energy

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Access and Retrieval Strategy for the Silo 3 Project
Document No. 40430-PL-0002, Rev. 1
September 2003
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effective in removing loose material due to either limits of wand reach or compaction of
material. The construction of a reinforcing frame around the opening has been completed
during the construction phase, as well as the Excavator Building - Excavator Room and
Excavator Service Room. These rooms are constructed to provide material containment.
The wall opening will be enlarged in multiple segments by removing only a limited number
of wall sections at a time. This provides some flexibility in loosening compacted material,
using the excavator, from behind the wall through a partially made opening. Pneumatic
retrieval can be used again if material is loosened and flowable. Otherwise, the excavator
will be used to remove material before proceeding with removal of additional wall sections.
2.4 MECHANICAL RETRIEVAL
Once the wall opening has been fully developed, the Excavator is used to retrieve material
from the silo. The Excavator is also used to fragment compacted material that could not
initially be pneumatically retrieved. Pneumatic retrieval can be used again, from the silo
dome or from the excavator, if material is loosened and flowable.
Retrieval operations are considered complete when no additional material can be removed
using either the PRS or the MRS.
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