Method purification of liquid radioactive wastes and concentrates from organic impurities

UDC: 
УДК 621.039.71+621.039.73

Issue of journal:

Abstract: 

The issue of conversion of liquid radioactive wastes (LRW) is an important task for
reactor operation irrespective of the reactor design. Currently, conversion of liquid
radioactive wastes involves minimization of the volume of wastes and reducing the
concentrates to an optimal form for disposal. The most general method for conversion
of liquid radioactive wastes is vaporizer conversion. The realization of this method
generates wastes which are difficult for conversion. This waste is a liquid radioactive
concentrate (LRC). Liquid radioactive concentrate is a colloidal system composed of
two phases: the water phase and the bottom sediments, or the sludge. The sludge
represents mineral finedispersed granules with an adsorptive layer of organic
substances with complex chemical composition. Cementation of the sludge is impossible
to achieve. Therefore, it is necessary to purify the sludge from organic impurities.
Purification of the sludge by certain methods is difficult. So carrying out research to
develop immobilization technology for liquid radioactive concentrates is required [1].
A method for LRW and LRC purification by an inorganic sorbent, such as polianite,
has been proposed by IPPE scientists. The research demonstrated the efficiency of LRW
purification from organic impurities. The principal tasks of further research into the
solidification processes which occur during chemical processing of the sludge samples
were formulated on the basis of experimental data.

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