辐照和热耦合作用对改性钠基膨润土铯吸附影响研究

Abstract

Abstract: In order to study the influence of gamma-ray irradiation and thermal simultaneous action on the absorption property of buffer material, this study is based on the modified sodium bentonite which is from Gaomiaozi. The distribution coefficients of ¹³⁷Cs are measured separately in the modified sodium bentonite and the modified sodium bentonite undergoing gamma-ray irradiation and thermal simultaneous action by batch method. The experiment results show that gamma rays irradiation and thermal simultaneous action helps improve the ability to absorb ¹³⁷Cs on the sodium bentonite under the experimental conditions. Compared with the modified sodium bentonite, the increment is in the range of 38.5 % to 46.8 %. A pilot evaluation model for nuclide release, migration, and dose estimation of the HLW geological repository was established. GoldSim safety evaluation software was used to simulate the release rate in the near and far field and radiation effects on the biosphere of ¹³⁵Cs under the reference sites. The simulation results show that the ambient dose caused by ¹³⁵Cs can be reduced by increasing the thickness of bentonite after being irradiated by waste.

Key words: modified sodium bentonite, coupling effects of thermal and γ irradiation, cesium, distribution coefficient, migration simulation

CLC Number:

TL942

ZHAO Shuaiwei, MAO Liang, BAI Jingxiu, LIU Wei, JIA Meilan, ZHAO Yandong, LI Honghui, GAO Chao, YANG Zhongtian. Coupling effects of thermal and γ irradiation on the adsorption performance of bentonite to Cs[J].RADIATION PROTECTION, 2024, 44(6): 687-694.

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Coupling effects of thermal and γ irradiation on the adsorption performance of bentonite to Cs

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