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

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Draft p. 3.6.18<br />

Issue<br />

Response<br />

37U<br />

ALTERNATIVE DISPOSAL CONCEPTS<br />

Appropriate references on these sorption coefficients need to be cited here. (218-DOI)<br />

These conditions are specified for the experiments, and the environmental conditions<br />

deep within the sediments are also being characterized at this time. (See Talbert 1979 and<br />

Talbert 1980).<br />

Draft p. 3.6.19<br />

Issue<br />

These sorption coefficients mean very little unless their exact measurement conditions<br />

(chemical and physical) are described. This would include as a minimum: ionic strength and<br />

compositon <strong>of</strong> the solution, initial exchange conditions <strong>of</strong> the clay, pH and Eh <strong>of</strong> the solu-<br />

tion, surface area <strong>of</strong> the clay, sorption equilibrium time, and solid-to-liquid ratio.<br />

(218-DOI)<br />

Response<br />

This figure summarizes data presented in the 1975 Seabed Disposal Program Annual Report<br />

(Talbert 1976).<br />

Draft p. 3.6.19<br />

Issue<br />

(218-DOI)<br />

Response<br />

This statement appears in error. 5Mn shows more than a factor <strong>of</strong> 10 spread.<br />

54Mn does show slightly more than a factor <strong>of</strong> 10 spread; however, ion transport cal-<br />

culations show such conservatism that a difference covering two orders <strong>of</strong> magnitude would<br />

still be a safe and acceptable level. As pointed out, sorption characteristics are proba-<br />

bly less important than permeability.

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