Simulation Of Radiation Damage In Rocks
Considered For Safe Storage Of Nuclear Waste
Author(s)
V. I. Dubinko, A. N. Dovbnya, D. I. Vainshtein
& H. W. den Hartog
Abstract
Rock salt is one of the considered storage mediums for radioactive waste, and so
the behavior of rock salt in the vicinity of the waste canisters is of great practical
interest. The main contribution to the irradiation from a radioactive waste comes
from gamma-radiation, which requires a comparison of its action with that of the
electron irradiation, widely used for simulation of radiation damage in rock salt.
Samples of synthetic crystals of NaCl have been electron and γ-irradiated and
subsequently investigated by means of differential scanning calorimetry and
atomic force microscopy. Our theoretical modeling of the irradiation damage has
shown that the observed difference in colloid production under electron and
gamma irradiation may be explained by the difference in the dose rates rather
than the irradiation type. The data on radionuclide migration in the geological
medium material of the disposal site are required for estimating the ecological
safety of the radioactive waste disposal system in granite and tuff rocs.
Penetration profiles of cerium 139Ce in granite and tuff specimens (before and
after γ-irradiation) were measured by means of nuclear physics methods.
Keywords: radioactive waste, electron and gamma-radiation, rock salt, tuff,
granite, radionuclide migration.
1 Introduction
Rock salt is an attractive storage medium for nuclear high level waste (HLW)
since geological rock salt deposits stay away from water for millions of years.
Keywords
radioactive waste, electron and gamma-radiation, rock salt, tuff,
granite, radionuclide migration.
Related Book
Other papers in this volume
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