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

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4.34<br />

FUEL ASSEMBLY<br />

SHEAR<br />

RETRIEVE<br />

UNDISSOLVED HULLS AND<br />

FUEL HARDWARE<br />

S HULL DISSOLVED FUEL<br />

LEACH<br />

MONITOR<br />

FOR Pu<br />

TEMPORARY<br />

STORAGE<br />

GRIZZLY- HULLS<br />

SEPARATOR<br />

4<br />

HARDWARE FINES COMPACT<br />

PIECES DEACTIVATION<br />

PACKAGE<br />

INTERIM<br />

STORAGE<br />

PACKAGE<br />

INTERIM<br />

STORAGE<br />

FINAL FINAL<br />

DISPOSAL<br />

DISPOSAL<br />

FIGURE 4.3.7. Flow Diagram <strong>of</strong> Mechanical Compaction <strong>of</strong> Hulls<br />

process, the sheared cladding hulls are segregated from the stainless steel end fittings and<br />

other fuel element hardware and from the Zircaloy fines. The hulls are melted, and the<br />

ingots from the melter are sealed into stainless steel containers. The Zircaloy fines are<br />

deactivated to eliminate pyrophoric hazards and are packaged with the stainless steel com-<br />

ponents without melting. This melting concept has been demonstrated successfully in making<br />

ingots 10 cm (4 in.) in diameter from simulated fuel residue.<br />

A flow diagram for the melting process is identical to that shown in Figure 4.3.7<br />

except that melting is substituted for compaction. The facility is designed to produce<br />

6 ingots/day, 0.23 m dia x 1.45 m long. These ingots are packaged in 0.76 m dia x 3 m<br />

stainless steel canisters, and the fuel hardware is packaged in identical canisters. The<br />

estimated quantities are 1.6 canisters/GWe-yr <strong>of</strong> hardware and 2.1 canisters/GWe-yr <strong>of</strong> melted<br />

hulls.<br />

4.3.3.2 Failed Equipment and Other Noncombustible <strong>Waste</strong> Treatment<br />

The example treatment <strong>of</strong> failed equipment and noncombustible waste used in this State-<br />

ment involves decontamination and disassembly <strong>of</strong> some <strong>of</strong> the failed equipment (but not <strong>of</strong>

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