Tritium extracting and separating system in a nuclear fusion reactor

Object: To effectively extract and separate tritium of low concentration contained in helium gas coolant and to reduce a level of radioactive rays in a cooling system. Structure: Gases are introduced into a dust separator from a blanket He gas cooling system to remove carbon, radioactive metal corrosion product and dust, and tritium is converted into water at CuO bed. Next, HTO and T2O are adsorbed in a large molecular sieve adsorption tower. The adsorption tower is deadsorbed, and the thus deadsorbed gases are fed to three small molecular sieve adsorption towers installed in series. Tritium water in the gases and impurities are adsorbed in separate adsorption towers. Next, the adsorption towers are increased in temperature to deadsorb tritium water to separate it into water and He by a cold trap. This is subject to electrolysis in an electrolytic tank to recover tritium gases. (Ikeda, J.)