The decontamination of noncompactable radioactive wastes, such as tools and equipment, aims to reduce the waste volume to be conditioned and stored. The electrocoagulation (EC) application in the decontamination of noncompactable radioactive waste from stainless steel containing uranium, was studied to evaluate its technical viability. The first studies were carried out with stainless steel plates coated with WO3 to simulate a fixed contamination and to determine the best tungsten removal conditions via EC considering pH, electrolyte support, distance between the electrodes, cell potential and counter-electrode material. The best removal conditions for WO3 were applied to plates contaminated with UO2(NO3)2 to evaluate the viability of the EC decontamination process. Uranium removal efficiencies of 90% were obtained in 1 h, at pH of 1, 2.4 V and 1 cm of distance between anode / cathode in a circular array. The EC process, under the previously obtained conditions, was applied to two metallic pieces contaminated with U. It proved feasible to decontaminate metallic pieces through the EC process, thus being able to obtain up to 90% U removal efficiency; however, it is important that the surfaces of the parts are free of grease and dust.

中文翻译：

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通过电凝对放射性金属表面进行净化。

对不可压紧的放射性废物（例如工具和设备）进行去污的目的是减少要处理和储存的废物量。研究了电凝法（EC）在含铀不锈钢中对不可压实放射性废物进行净化处理中的效果，以评估其技术可行性。最初的研究是使用涂覆有WO3的不锈钢板进行的，以模拟固定污染并通过考虑pH值，电解质支持，电极之间的距离，电池电势和反电极材料的EC确定最佳的钨去除条件。将WO3的最佳去除条件应用于被UO2（NO3）2污染的板上，以评估EC净化过程的可行性。在pH值为1、2的1小时内，除铀效率达到90％。圆形阵列中阳极/阴极之间的距离为4 V，距离为1 cm。在先前获得的条件下，将EC工艺应用于两个被U污染的金属零件。事实证明，通过EC工艺对金属零件进行污染处理是可行的，因此可以获得高达90％的U去除效率。但是，重要的是零件表面必须没有油脂和灰尘。