Comprehensive method for treating liquid radioactive wastes

Author: R.A. Penzin, E.A. Belyakov, A.A. Shvedov, O.V. Evdokimov, S.N. Pichugin

Reference: Patent, 20.09.1998, Moscow patent holder: R.A. Penzin

Keywords: liquid waste, decontamination, cesium, strontium, reverse osmosis, distillation

Abstract: Usage: chemical technology, specifically in the nuclear environment, the processing of liquid radioactive waste (LRW) resulting from the operation of various atomic power plants. Stepwise processing of liquid waste, containing cesium and strontium, is conducted in the following sequence:

>Pre-treatment stage: mechanical cleaning, ultrafiltration, microfiltration

>Passing through selective inorganic sorbent, based on ferrocyanide of transitional metal of copper, nickel, cobalt and porous inorganic carrier, then subjected to desalting and concentration using one of the following methods:

1. distillation

2. two-step method: first step: usage of reverse osmosis or electro-demineralization, second step: distillatory or electroosmotic concentration.

URL: http://www.findpatent.ru/patent/211/2118945.html

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