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The Effect of montmorillonite partial density on the role of colloid filtration by a bentonite buffer

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黒澤 進; 田中 知*; James, S. C.*; 油井 三和

Kurosawa, Susumi; Tanaka, Satoru*; James, S. C.*; Yui, Mikazu

ベントナイト緩衝材の間隙構造を評価するため、均質化法モデルを用いて、間隙の大きさと有効粘土密度の関係について検討した。その検討では、コロイドの大きさとして最小の1nmと間隙の大きさが同等となるような有効粘土密度を試算した。その結果、ベントナイト系緩衝材中の有効粘土密度が1.5Mg/m$$^{3}$$以上の場合、間隙の大きさは1nm以下と見積もられ、この場合にはコロイドは緩衝材中を移行し得ないと考えられる。

In this work, the effective clay density as a function of interstitial pore size was estimated by applying the homogenization analysis (HA) of bentonite. In the estimation by the HA method, the interstitial pore size was set up to be $$<$$ 1 nm which is the smallest size equivalent to colloid. The results indicate that the interstitial pore is estimated to be 1 nm or less if the effective clay density in the buffer is higher than 1.5 Mg/m$$^{3}$$ and it is also suggested that the penetration of colloidal fine particles in the buffer did not occur.

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パーセンタイル:49.7

分野:Nuclear Science & Technology

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