Studies on the fixation of tritiated water using the cement hydration. (II). application of compartment model to the transfer curves of tritium.:Application of Compartment Model to the Transfer Curves of Tritium

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In the previous paper, we have reported the results of basic experiments to fix tritiated water using the hydration of cement, and found that most tritiated water transfers to surrounding water, even if it is incorporated using the hydration of cement.In this report, we tried to apply a simple compartment model to the tritium transfer curves reported in the previous paper, which represent the phenomena that most water containing tritium is exchanging with a surrounding water, regardless of its forms, i. e., a crystalline water, free water and so on. We divided a solidified cement into three groupes with respect to the exchangeability of water, i. e., a compartment of fixed water, of compositions except water, and of exchanging water. We developed a simple compartment model under the assumption that the water in the third compartment is exchangeable with the sorrounding water with a certain exchanging volume rate E, not altering by time. The transfer curves calculated with the model contains unknown parameter, E. By the method of least squares, varying the values of E, we could obtain most approximated transfer curves of tritium to those obtained by the previous experiments.In the result, we knew that the simple compartment model is applied to the tritium transfer curves reported in the previous paper.
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