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

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4.35<br />

noncombustible waste), and packaging either in 55-gallon drums, in 1.2 x 1.8 x 1.8 m steel<br />

boxes, or (at an FRP) in canisters like those used to contain fuel residue (Sec-<br />

tion 4.3.3.1). Failed equipment is packaged in canisters when it cannot be decontaminated<br />

sufficiently to allow packaging in boxes (the boxes must have a surface dose rate less than<br />

200 mR/hr) or it cannot be disassembled to fit in drums. Figure 4.3.8 is a schematic flow<br />

diagram illustrating treatment procedures at an FRP. Procedures at a MOX-FFP are similar<br />

in most respects. Alternative treatment concepts involve varying degrees <strong>of</strong> decontamination<br />

and disassembly before packaging and the addition <strong>of</strong> fixation materials (e.g., cement)<br />

within the packages.<br />

For the generic reprocessing cycle studied (Section 3.2.1.2), it is estimated that the<br />

quantity <strong>of</strong> failed equipment resulting from operation <strong>of</strong> an FRP could be contained in a<br />

mixture <strong>of</strong> packages comprising 1.4 canisters/GWe-yr, 1.1 boxes/GWe-yr, and 9.0 drums/GWe-yr.<br />

The boxes have surface dose rates low enough to allow contact-handling but the canisters<br />

and drums require remote handling. The noncombustible waste is packaged only in 55-gallon<br />

drums; the estimated quantity from an FRP is 84 drums/GWe-yr, approximately 10% <strong>of</strong> which<br />

NONCOMBUSTIBLE<br />

NONCO STIBLE FA ILED EQUIPMENT<br />

WASTE<br />

-SURGE STORAGE<br />

DECONTAMINATION > DISASSEMBLY<br />

WASTE PACKAGING 4--<br />

(REMOTE OR<br />

DIRECT CONTACT) HULLS PACKAGING<br />

I FACILITY<br />

S CONTAINER CLOSURE<br />

CONTAINER DECONTAMINATION<br />

WASTE ASSAY<br />

PREPARATION<br />

FOR SHIPMENT<br />

INTERIM STORAGE OR TRANSPORTATION<br />

TO REPOSITORY<br />

FIGURE 4.3.8. Flow Diagram for Treatment <strong>of</strong> Failed Equipment<br />

and Noncombustible <strong>Waste</strong> at an FRP

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