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

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B.19<br />

TABLE B.6.1. Average Chemical Composition by Oxides<br />

for Representative Disposal Media<br />

Compound, Rock Types<br />

% <strong>of</strong> Total Granite Shale Basalt<br />

Si0 2 70.2 55.0 49.1<br />

A1 20 3 14.5 21.0 15.7<br />

Fe 20 3 1.6 5.0 5.4<br />

FeO 1.8 1.5 6.4<br />

CaO 1.9 1.6 9.0<br />

Na 20 3.4 0.8 3.1<br />

K 20 4.1 3.2 1.5<br />

MgO 0.9 2.3 6.2<br />

H 20 0.8 8.1 1.6<br />

X 0 0.4 1.9 2.0<br />

PIERRE MICHIGAN<br />

SHALE - BASIN APPALACHIIAN<br />

SI\ BASIN \<br />

MID-CONTINENT AINIG<br />

SSHALES<br />

/ -- - ----<br />

WEST SAC RAMENTO I\<br />

COAST VALLEY I<br />

FORMATIONRGILLACEOUS FORMATIONS<br />

\ COAST TRIASSICCYS<br />

\BASNS CONTAINING BSINS<br />

. ARG LLACEOUS FORMATIONS ..<br />

FIGURE B.6.3. Representative Shale Units in the United States<br />

(adapted from Office <strong>of</strong> <strong>Waste</strong> Isolation 1978a)<br />

desirable regarding shale-waste reactions under repository conditions. Heating effects may<br />

be significant with shale as well as effects <strong>of</strong> temperature rise on contained water.<br />

Shales may have discontinuities consisting <strong>of</strong> bedding, joints and fracture planes which<br />

are <strong>of</strong>ten filled with calcite, but also may be unfilled.

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