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

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Reactors<br />

<strong>Waste</strong> Sources LWR Fuel Cycles <strong>Waste</strong> Mixes<br />

* Production, propulsion<br />

I Domestic civilian and research - * U + Pu Recycle Cases * Spent fuel assemblies or rods<br />

6.7<br />

* Domestic defense * LMFBR .Once-through cycle (LWR)I * High-level waste from Purex process<br />

* Foreign * CANDU<br />

* Magnox<br />

* Pebble bed<br />

<strong>Waste</strong> Forms<br />

* Spent fuel assemblies or rods<br />

* Borosilicate glass Transport Geoloic Medium Site Arrangement<br />

* Metal matrix I Rai Crystalline<br />

SSuper calcine * Truck -- Salt * Multiple holes per site<br />

*.Coated particles * Ship/barge * Sedimentary * Single hole per site<br />

* Refractory compounds * Aircraft (other than salt)<br />

* Calcine<br />

e Others<br />

Very Deep Hole<br />

Hole Type Hole Excavation Down-hole Status<br />

S* Single vertical hole *I Rotary drilling<br />

* Shaft * Shaft sinking I* Full casing I* Drilling mud filled<br />

* Single hole with multiple branches * Big hole drilling * Partial casing * High viscosity fluid filled<br />

* Shaft/hole combination * Blind hole boring * No casing * Water filled<br />

* Single hole with leached or under- * Combination * Dry<br />

reamed cavity<br />

Emplacement Method Hole Sealing Note: Option Classifications<br />

* Controlled lowering * Downhole seals separating waste I*Current Reference I<br />

* Free fall * Multiple seals above waste *Primary Alternative<br />

e Controlled pushing * Single seal above waste * Secondary Alternative<br />

* Single seal plus backfilling<br />

FIGURE 6.1.1. Major Options for Very Deep Hole Disposal <strong>of</strong> Nuclear <strong>Waste</strong>

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