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

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Draft pp. 1.12 and 3.1.32<br />

Issue<br />

208<br />

GEOLOGIC CONSIDERATIONS<br />

One commenter indicated that the media properties consider only properties which make<br />

it possible to construct a repository. (113-EPA) Several commenters noted that ground-<br />

water is discussed only during the construction phase and there appears no discussion <strong>of</strong> the<br />

likelihood <strong>of</strong> water inflow following repository closure. (113-EPA, 208-NRC)<br />

Response<br />

Emphasis is on the construction phase because it is believed that groundwater is more<br />

likely to enter a partially mined repository as opposed to a finished repository in a medium<br />

selected partly because <strong>of</strong> its essential lack <strong>of</strong> flowing groundwater. Groundwater transport<br />

and possible ways by which groundwater might reach a repository are considered in Section<br />

5.5.<br />

Draft pp. 1.12, 1.25, 3.1.28<br />

Issue<br />

One commenter pointed out that rock falls rather than rock bursts account for the<br />

majority <strong>of</strong> injuries and fatalities in mines. (218-DO1)<br />

Response<br />

The text has been changed.<br />

Draft p. 1.13<br />

Issue<br />

Not only hydraulic gradients should be measured in situ but other hydraulic and geo-<br />

chemical parameters such as permeability, porosity, and sorptive properties should be mea-<br />

sured on site as well. (218-DOI)<br />

Response<br />

The text has been changed.<br />

Draft p. 1.13<br />

Issue<br />

One commenter suggested that any disposal method that requires maintenance (e.g., the<br />

need for dewatering in high permeability rock) should be avoided. (128)

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