METHOD OF PROCESSING LIQUID RADIOACTIVE WASTES Russian patent published in 2012 - IPC G21F9/08 

FIELD: chemistry.

SUBSTANCE: method of processing liquid radioactive wastes which contain radionuclides in ionic and colloidal form and mineral and organic ballast components in dissolved and suspended states involves oxidation of organic components of liquid radioactive wastes by feeding ozone into a stream of wastes which is pre-filtered on cellular filter material; ozonation is carried out with ozone with concentration higher than 0.2 g/l, in a channel for feeding ozone from an ozone generator into a mixing chamber, a vacuum which is less than 1/3 of the inverse ozone concentration is formed. The cross-section of the gas channel for feeding ozone is less than the ratio of the flow rate of gas with ozone to ozone concentration by about 5000 times. The stream of ozonised liquid radioactive wastes is directed opposite the stream of ozone in bubbles. The mixing chamber is divided by a net into two sections, into the bottom of which ozone is fed from an ejector with a closed stream of liquid radioactive wastes, taken from the same section, and then divided by a net and then raised in the second section opposite the stream of liquid radioactive wastes. The stream of liquid radioactive wastes is successively fed through two or more chambers, the last of which the amount of ozone is selected not less than 1/3 of the product of ozone concentration, flow rate of liquid radioactive wastes and a stoichiometric coefficient of its reaction with the organic component in the liquid radioactive wastes. The closed stream of liquid radioactive wastes with ozone is fed from the ejector into the bottom section of the mixing chamber at a tangent to its perimetre.

EFFECT: invention enables to reduce the volume of a radioactive concentrate by increasing the ozone utilisation factor.

1 dwg, 1 ex