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

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Draft, p. 3.6.19<br />

Issue<br />

371<br />

ALTERNATIVE DISPOSAL CONCEPTS<br />

Although organic complexes might be insignificant, there is a chance that carbonate<br />

(or other inorganic) complexing might be significant. This should be pointed out.<br />

(218-DI0)<br />

Response<br />

Inorganic complexing could indeed be a problem, but the complexing probably will come<br />

from leaching <strong>of</strong> the waste form rather than from the sediments. Carbonate complexes would<br />

be less likely since the planned water depth is well below the calcium carbonate compensa-<br />

tion depth; therefore, there is very litte carbonate available for complexing.<br />

Draft p. 3.6.20, line 10 from bottom<br />

Issue<br />

Replace "a poor" with "no" in the sentence beginning on line 20 so that it reads: For<br />

the reasons given, the water column is likely-to be no barrier against large quantities <strong>of</strong><br />

nuclides.... (23-DOC)<br />

Response<br />

The water column is not considered a primary barrier. However, it will inhibit man<br />

from intruding, and it can contribute both isotopic, volumetric dilutional and dispersional<br />

benefits.<br />

Draft p. 3.6.20<br />

Issue<br />

Under the discussion <strong>of</strong> the water column, it should be recognized that while the water<br />

column may not provide a barrier to migration, its enormous capability to dilute such<br />

releases below significant concentrations cannot be overlooked as a mitigative feature.<br />

(208-NRC)<br />

Response<br />

The point is being taken into account. However, DOE considers it <strong>of</strong> secondary impor-<br />

tance to the primary barriers (canister, waste form, and geologic formation).

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