Clean-up system for cement solidifying system for radioactive liquid wastes

Purpose: To avoid increase in the amount of wastes without using service water for the plant and eliminating the requirement for the processing facility of exhausted cleaning water. Constitution: Concentrated liquid wastes are sent from a tank to a pre-processing vessel, where calcium compounds are incorporated to react with boric acid contained in the liquid wastes to deposite insoluble salts. Then, the deposits are aged into settling slurries, which are concentrated and then fed to a kneading device where they are formulated into cement pastes and filled in a drum can. The kneading device is cleaned by introducing the liquid wastes from the tank and the liquid wastes after cleaning are sent from the bottom to the pre-processing vessel, where they are applied with disposal by the incorporation of the calcium compounds and concentrated. (Yoshino, Y.)