Abstract
Gamma radiation levels during the containment period and alpha radiation levels in the packing material during the controlled release period were calculated based on the conceptual design of the waste package for a high-level nuclear waste repository in basalt. The maximum gamma dose rate was 250 rad/h and the maximum absorbed dose during the containment period was 66 Mrad. The alpha radiation levels calculated were strongly dependent on the assumed solubility and sorption of the radionuclides considered. The total absorbed alpha dose was 1.4 x 10/sup 10/ rad at the packing/container interface, and 1.2 x 10/sup 10/ and 1.1 x 10/sup 10/ rad at 7 and 19 cm from the container wall, respectively. The radiation levels calculated were discussed in relation to two issues: the radiolytic enhancement of container corrosion during the containment period and the effect of alpha radiation on the stability of packing material during the controlled release period.
Published Version
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