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Response<br />

The text has been changed.<br />

227<br />

GEOLOGIC CONSIDERATIONS<br />

Studies have been and are being made <strong>of</strong> the properties <strong>of</strong> granite at elevated tempera-<br />

tures. These studies include the Stripa tests in Sweden and the Climax test facility now<br />

being operated at the Nevada Test site.<br />

These field studies, along with laboratory studies on small samples and development <strong>of</strong><br />

analytical and numerical models, are being continued in the NWTS program. This program is<br />

intended to obtain sufficient information to permit design <strong>of</strong> a repository so that it will<br />

function safely for its full design life and not be impaired by such phenomena as cracks,<br />

heave, or subsidence.<br />

Draft p. 3.1.11<br />

Issue<br />

One commenter requested an explanation <strong>of</strong> why the areas shown in Figure 3.1.2 are<br />

favorable granitic sites; there are other areas where granitic rocks are either at or close<br />

to the surface. (208-NRC)<br />

Response<br />

The areas shown in draft Figure 3.1.2 are shown as potential repository granites<br />

because they are near or at the surface and, as stated, because they are large granite mas-<br />

ses. At this stage, they are potential repository sites--there certainly are others.<br />

Draft p. 3.1.11<br />

Issue<br />

(208-NRC)<br />

Response<br />

One commenter asked if "hard" refers to hardness (as in scratch test) or strength?<br />

The statement--"Most mineral components are hard..."--refers to the resistance <strong>of</strong> a<br />

smooth surface to abrasion.<br />

Draft p. 3.1.11<br />

Issue<br />

One commenter indicated that in addition to thermal expansion, expansion <strong>of</strong> secondary<br />

minerals can also be caused by weathering, decomposition and alteration. (154)

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