Robert Andrews - US Nuclear Waste Technical Review Board
Robert Andrews - US Nuclear Waste Technical Review Board
Robert Andrews - US Nuclear Waste Technical Review Board
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Site Scale Carbon 14 Observations<br />
and Interpretation<br />
• Radiocarbon used to<br />
investigate<br />
groundwater velocities<br />
• Carbon-14 (half life of<br />
5700 yrs) has been<br />
used to evaluate<br />
groundwater ages<br />
• Groundwater velocity<br />
estimates range from 5<br />
to 40 m/yr<br />
(corresponding to<br />
advective transport<br />
times over 18 km) of<br />
several hundred to<br />
several thousand years<br />
for unretarded species)<br />
00414PR_SZ_NRC_<strong>Andrews</strong>.ppt 46
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