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Settlement of clay-enveloped radioactive canisters
AbstractThe Swedish concept for isolating highly radioactive reactor waste from the biosphere is based on the use of copper canisters surrounded by dense smectite clay. The canisters exert a vertical pressure on the clay, which leads to settlement, that is almost exclusively caused by shear-induced creep of the clay.The clay is microstructurally non-homogeneous, and a stochastic model of creep, previously developed, should therefore apply. This model yields the often observed creep law, according to which the strain is proportional to log time, and this relation has also been observed in triaxial creep tests from which the creep parameters required for estimating the canister subsidence can be obtained. In a small-scale model experiment the settlement was in fact found to comply roughly with this creep, and the agreement suggests that the model used, and the mode of evaluating the settlement, are relevant.
Settlement of clay-enveloped radioactive canisters
AbstractThe Swedish concept for isolating highly radioactive reactor waste from the biosphere is based on the use of copper canisters surrounded by dense smectite clay. The canisters exert a vertical pressure on the clay, which leads to settlement, that is almost exclusively caused by shear-induced creep of the clay.The clay is microstructurally non-homogeneous, and a stochastic model of creep, previously developed, should therefore apply. This model yields the often observed creep law, according to which the strain is proportional to log time, and this relation has also been observed in triaxial creep tests from which the creep parameters required for estimating the canister subsidence can be obtained. In a small-scale model experiment the settlement was in fact found to comply roughly with this creep, and the agreement suggests that the model used, and the mode of evaluating the settlement, are relevant.
Settlement of clay-enveloped radioactive canisters
Pusch, Roland (author) / Adey, Robert A. (author)
Applied Clay Science ; 1 ; 353-365
1986-03-07
13 pages
Article (Journal)
Electronic Resource
English
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