用過的核燃料仍然含有分裂產物，具有高放射性的狀態，所以我們需要妥善處理。目前在國際間最常使用[深層處置]的方式，盡可能的隔絕跟人類的接觸。使用深層處置可能需要長達十幾萬年或是更久的長期處置，讓高階放射性物質衰減到自然背景值。所以合理評估高階放射性最終處置場所釋放放射性核種的安全性是非常重要的。
我們必須要有能力去評估在這幾十萬年這麼長時間中在地質環境/處置母岩可能產生什麼改變，而這些改變對於核種遷移會造成什麼影響。在本研究中，針對金門區域54個樣品進行分析銫和硒吸附實驗。利用線性回歸計算，評估核種吸附親和力對於化學和礦物成份的關係。在這裡所研究的條件下，發現Cs、Se的吸附親合力有比較差的R-square，然而在Al2O3、Fe2O3、CaO、MgO有正相關性。
可能是因為花崗岩樣品中組成較複雜的關係。本研究也進一步把破碎裂帶的樣品區分出來，發現它的R-square有明顯的改善。這意味著那些次要kaolinite, smectite, illite, and zeolite礦物組成將明顯的控制核種的遷移。
為了量化吸附行為，利用合成層狀鈣鈦礦物K1+5yCa2Nb3-xO10並引進B-site的空缺進行建立表面錯合模型的模擬，透過Cs吸附實驗來進行面錯合模式邊界條件的設定。結果表明，Cs吸附到邊緣吸附位置的影響是可以忽略的，另一方面這些陽離子交換反應為最主要影響礦物的因素。藉由分析這些關係，更了解知道地質可能有哪些變化，對於核種的吸附行為的影響。

A reasonable estimate of the fate of released radionuclides is important in the aspect of safety assessment of spent fuel repository. In this study, experiments of Cs and Se adsorption to 54 different Kinmen area granite samples were conducted. The connection between nuclide uptake and chemical and mineral composition was evaluated by using linear regression. In the condition studied herein, the Cs、Se uptake, although poor R-square values appeared, is positively correlated to content of Al2O3、Fe2O3、CaO、MgO. Observed poor R-square values are likely the result of the complexity of granite samples. Further, when isolating results of those fracture zone samples out of others, the R-square values were greatly improved. This means that those secondary minerals such as kaolinite, smectite, illite, and zeolite will pronouncedly control the transport of nuclides.
To quantify the adsorption behaviors, the concept of surface complexation modeling was applied and the limitation of this technique was evaluated by fitting the experiments of Cs adsorption to synthesized layered perovskite K1+5yCa2Nb3-xO10minerals. Results showed that the effect of Cs adsorption to edge sorption sites could be negligible for these cation-exchange-reaction dominant minerals.

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