THE USE OF WASTE ROCK FOR ROADS AND BUILDINGS AS AN ...
THE USE OF WASTE ROCK FOR ROADS AND BUILDINGS AS AN ...
THE USE OF WASTE ROCK FOR ROADS AND BUILDINGS AS AN ...
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Mathematical Formulation: External Dose<br />
• External gamma dose<br />
• Where<br />
• T = Exposure period [h.a-1 ]<br />
• SA = Specific activity of U-238 or Th-232 in the waste rock [Bq.g-1 ]<br />
• L = Dilution factor<br />
• DCExt = External DC for uranium or thorium [Sv.h-1 per Bq.g-1 ]<br />
• A dilution factor of 1 has been assumed for exposure to waste rock and 0.6 for<br />
exposure to building concrete.<br />
• External dose coefficients for the uranium and thorium series with all nuclides in<br />
secular equilibrium have been calculated with the MicroShield software for the<br />
various source geometries defined in the scenarios.
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