Surface treatment device and surface treatment method for first wall of thermonuclear reactor

In a device for a surface treatment of removing hydrocarbon compound containing tritium deposited on an armor of a first wall of a thermonuclear reactor, there is disposed a means for supplying a gas for oxidizing the hydrocarbon compounds to the first wall, recovering tritium water and oxidation reaction products from generated exhaustion gases and sending the oxidizing gas in the exhaust gases to an oxidizing gas regeneration means. The hydrocarbon compounds on the surface of the armor material are oxidized at a low temperature by an oxidizing gas with high reactivity. Accordingly, since tritium on the surface can be removed and recovered by heating as a tritium water without diffusing tritium on the surface to the inside of the armor material, the temperature elevation of the mother material of the armor can be reduced. As a result, the amount of tritium diffused to the inside of the armor can greatly be reduced, to increase the amount of tritium which can be reutilized effectively. Further, since the tritium oxidizing means can be saved, tritium can be recovered only by disposing an ordinary adsorption tower. (N.H.)