METHOD FOR DETERMINING DRYNESS OF ABSORBENT

To provide a method for determining dryness of an absorbent capable of efficiently and accurately determining dryness of an absorbent inside an absorption tower.SOLUTION: The configuration of a method for determining dryness of an adsorbent according to the present invention is a method for determining dryness of an adsorbent when an adsorbent 202, which adsorbs radioactive materials contained in contaminated water, which is waste from decommissioning work, is dried in an adsorption tower 200, the method comprising: acquiring a heater temperature for heating the adsorption tower; acquiring a pressure of the adsorption tower; acquiring a saturation temperature of water according to the pressure; and when ΔT is the value obtained by subtracting the saturation temperature of the water according to the pressure from the heater temperature, setting an approximation function in advance for relation between ΔT and a condensation rate and determining that the adsorbent has dried when the condensation rate falls below the approximation function.SELECTED DRAWING: Figure 5 【課題】吸着塔の内部の吸着材の乾燥を効率的且つ正確に判断することが可能な吸着材の乾燥判定方法を提供する【解決手段】本発明にかかる吸着材の乾燥判定方法の構成は、廃炉作業の廃棄物である汚染水に含まれる放射性物質を吸着する吸着材２０２を吸着塔２００内で乾燥させる際の吸着材の乾燥判定方法であって、吸着塔を加熱するヒータ温度を取得し、吸着塔の圧力を取得し、圧力に応じた水の飽和温度を取得し、ヒータ温度から圧力に応じた水の飽和温度を引いた値をΔＴとしたとき、ΔＴと凝縮速度の関係において近似関数をあらかじめ設定しておき、凝縮速度が近似関数を下回ったら乾燥したと判定することを特徴とする。【選択図】図５