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

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Response<br />

329<br />

ALTERNATIVE DISPOSAL CONCEPTS<br />

Section 6.1.1.3 <strong>of</strong> the final Statement discusses the R&D requirement associated with<br />

borehole sealing for the very deep hole concept. For very deep hole disposal, borehole<br />

sealing is potentially a greater R&D problem than for the mined repository because <strong>of</strong> the<br />

depth, pressures, temperature, and possible need for down-hole seal emplacement.<br />

Draft p. 3.3.37<br />

Issue<br />

The citation for Reference 27 is inadequate. Provide information whereby Mr./Ms.<br />

Stevens can be contacted. (208-NRC)<br />

Response<br />

Victor Stevens is a mining consultant located in Salt Lake City. His address is<br />

808 Kearns Building, Salt Lake City, Utah, 84101.<br />

Issue<br />

It would seem advisable, if not already considered, to gather information regarding<br />

the long-term stability <strong>of</strong> boreholes, wells,. and other deep rock penetrations in regions<br />

considered favorable for repository location. These observations can provide additional<br />

clues on assessing the stability <strong>of</strong> the repository location. This would be useful in<br />

assessing the host media, as well as that <strong>of</strong> the overlying and underlying formations espe-<br />

cially when considering the very deep hole concept <strong>of</strong> waste isolation. Perturbations <strong>of</strong> the<br />

earth's near-surface are readily detectable in both cased and uncased holes through sheared,<br />

ruptured, and squeezed boreholes and casings. (208-NRC)<br />

Response<br />

Gathering information on the long-term stability <strong>of</strong> existing holes has been con-<br />

sidered. The final Section 6.1.1.3 contains discussion <strong>of</strong> geophysical logging and instru-<br />

mentation techniques associated with data gathering <strong>of</strong> this nature.<br />

Draft p. 1.25<br />

Issue<br />

Rock Melt<br />

The introductory writeup on the rock melting concept does not present the disadvantages<br />

for this alternative, which were presented for the very deep hole concept, sub-sealed geolo-<br />

gic disposal, etc. Equal treatment <strong>of</strong> all alternatives should be demonstrated in the final<br />

EIS. (208-NRC)

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