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Management of Commercially Generated Radioactive Waste - U.S. ...

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6.166<br />

TABLE 6.2.1. Disposition <strong>of</strong> Principal <strong>Waste</strong> Products Using the Proposed<br />

<strong>Waste</strong> Disposal Concepts<br />

High-Level Liquid<br />

Spent Fuel Assemblies (Fuel Processing <strong>Waste</strong>) TRU <strong>Waste</strong>(a)<br />

Mined Repository Packaged and emplaced Incorporated in immo- Packaged and emplaced<br />

in mined repository. bilized solid, pack- in mined repository.<br />

aged and emplaced.<br />

Very Deep Hole Packaged and emplaced Converted to immobil- Disposal using suitin<br />

deep hole ized solid. Packaged able alternative<br />

repository, andemplaced in deep technique.(b)<br />

hole repository.<br />

Rock Melt Processed to a Poured in rock melt Disposal using suitliquid<br />

state repository. able alternative<br />

technique.(c)<br />

Island Mined Repository Packaged and emplaced Converted to immobile Packaged and emplaced<br />

in island mined solid. Packaged and in island mined<br />

repository, emplaced in island repository.<br />

repository.<br />

Subseabed Packaged and emplaced Converted to immobile Disposal using suitin<br />

subseabed solid. Packaged and able alternative<br />

repository, emplaced in subseabed technique.(b)<br />

repository.<br />

Ice Sheet Packaged and emplaced Converted to immobile Disposal using suitin<br />

ice sheet solid. Packaged and able alternative<br />

repository. emplaced in ice sheet technique.(b)<br />

repository.<br />

Well Injection Processed Injected into geologic Disposed using suitable<br />

formations. alternative concept.<br />

Transmutation Processed Selected isotopes par- Disposed using suitable<br />

titioned and transmuted alternative concept.<br />

to stable or shorter<br />

lived isotopes and<br />

disposed <strong>of</strong> using<br />

alternative concept.<br />

Space Processed Entire waste stream or Disposed using suitable<br />

selected isotopes con- alternative concept.<br />

verted to solid and<br />

emplaced in heliocentric<br />

orbit.<br />

(a) Remotely handled and contact-handled TRU wastes including dissolver solids, HEPA filters,<br />

incinerator ash wastes, failed and decommissioned equipment wastes.<br />

(b) Could possibly be disposed <strong>of</strong> by the concept, but this is considered unlikely.<br />

(c) Some chopped cladding and TRU wastes might be slurried into rock melt cavity subject to<br />

diluting limitations on HLW waste.<br />

6.2.1.2 Very Deep Hole<br />

In the very deep hole concept, disposal <strong>of</strong> high-level waste would be achieved by remote<br />

emplacement in bored shafts at depths greatly exceeding those <strong>of</strong> the mined repository.<br />

Engineered containment would be provided by the waste form, canisters, and perhaps addi-<br />

tional barrier layers. Sorptive backfill, if used, would provide an additional engineered<br />

barrier. Isolation and natural barriers would be provided by the host rock and surrounding<br />

geologic and hydrologic environment, enhanced by the great distance to the accessible envi-<br />

ronment. The geologic and hydrologic environment would be selected to provide stability,<br />

minimal hydrologic transport potential, and low resource attractiveness.<br />

A waste packaging facility would be located at the repository site where spent fuel<br />

assemblies would be packaged individually. The packaged fuel assemblies would be placed in<br />

rotary drilled holes as much as 10,000 m deep in crystalline rock. Holes for packages for

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