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

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Response<br />

The text was changed.<br />

Draft p. 3.1.36<br />

Issue<br />

246<br />

GEOLOGIC CONSIDERATIONS<br />

The basis for the conclusion that costs for additional support necessitated by the<br />

reduction in rock strength caused by radiation are not expected to be significant should be<br />

given. (208-NRC)<br />

Response<br />

Some data are presented in paragraph three for salt. This paragraph points out that<br />

adequate knowledge <strong>of</strong> radiation on rock properties is lacking. Based on the information<br />

available, it was concluded that the known effects on costs would be small compared to the<br />

total costs. An additional reference was added to the list at the end <strong>of</strong> Section 5.2<br />

(reference 26).<br />

Draft p. 3.1.36<br />

Issue<br />

Regarding seismic loads, a brief description <strong>of</strong> how underground structures respond<br />

characteristically to earthquakes would be appropriate. (154)<br />

Response<br />

A reference has been added for seismic effects on underground structures under Tectonic<br />

Considerations Seismicity and Magmatism.<br />

Draft p. 3.1.41<br />

Issue<br />

Operational difficulties which may prevent sealing are not discussed; it may be dif-<br />

ficult to backfill or retrieve if a repository becomes flooded. (208-NRC)<br />

Response<br />

The site investigation and testing program should characterize the repository well<br />

enough to show that there would not be problems like flooding--any indication <strong>of</strong> these kinds<br />

<strong>of</strong> problems would likely delay or prevent use <strong>of</strong> the repository.

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