CONTAMINATED FLY ASH TREATMENT METHOD AND CONTAMINATED FLY ASH TREATMENT SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a contaminated fly ash treatment method and a contaminated fly ash treatment system capable of enriching radioactive substances contained in contaminated fly ash to have a capacity as small as possible for stabilization.;SOLUTION: A contaminated fly ash treatment method includes: an elution step of storing a treatment target containing contaminated fly ash generated from a combustion furnace and water in an elution tank, eluting radioactive cesium in the treatment target into the water to produce eluant; a first solid-liquid separation step of separating the eluent into a first treatment liquid from which solid substances are removed, and decontaminated matters from which the radioactive cesium is removed; a cesium removal step of flowing the first treatment liquid to a cesium adsorption tower filled with adsorbent, and causing the adsorbent to adsorb the radioactive cesium in the first treatment liquid; and a melting step of supplying the decontaminated matters to a melt furnace to melt the decontaminated matters and feeding generated fly ash to the elution tank if a radioactive concentration of the decontaminated matters exceeds a preset, predetermined value, waste adsorbent adsorbing the radioactive cesium in the cesium removal step being solidified and stabilized.;COPYRIGHT: (C)2015,JPO&INPIT