廃ゼオライトの長期保管方策の検討,16; 残水浸透挙動を考慮したモデルによる使用済ゼオライト吸着塔内の数値解析

Consideration for long-term storage of a spent zeolite adsorption vessel, 16; Numerical simulation of inner used zeolite vessel including permeation model of remained contaminated water

宇留賀 和義*; 塚田 毅志*; 山岸 功 ; 寺田 敦彦  

Uruga, Kazuyoshi*; Tsukada, Takeshi*; Yamagishi, Isao; Terada, Atsuhiko

福島第一原子力発電所の汚染水処理に使用されたゼオライト吸着塔の保管時の塔内水分挙動を予測している。内部の残水の蒸発・凝縮およびゼオライトへの浸透について、試験結果に基づくモデルを構築し、数値解析を行った結果、残水に含まれる塩分は吸着塔の中心部に濃縮され、残水中塩分濃度は減少することがわかった。

The inside of the zeolite adsorption tower used for the treatment of contaminated water at the Fukushima Daiichi Nuclear Power Station is predicted during storage. As a result of constructing a model based on the test results and performing numerical analysis on the evaporation/condensation of the residual water inside and the permeation into the zeolite, it showed that the salt contained in the residual water was concentrated in the center of the adsorption vessel. Then, the salinity in the residual water decreased.