A mobile system for treating low-salinity low-activity liquid wastes

Moscow Radon Cooperative. Applied Technology Research and Development Institute. Translated from Atomnaya Énergiya, Vol. 73, no. 6, pp. 474-478, December, 1992.     

Liquid radwaste concentration by evaporation from porous plates

The possibility of concentrating liquid radwastes by evaporation from the surface of porous plates is examined. It is shown by means of tests of a laboratory setup and an experimental stand that liquid radwastes can be concentrated to salt content 319 g/liter at a temperature far below the evaporation temperature of water and with specific energy consumption 20 times lower that the specific heat of vaporization of water. The results of the tests of the experimental setup with capacity up to 43 kg/h with respect to the evaporated water are described; this setup has been incorporated in the EKO mobile modular water purification complex used at the MosNPO Radon for reprocessing radioactive water from various organizations. Translated from Atomnaya énergiya, Vol. 106, No. 4, pp. 210–214, April, 2009.     

Feasibility of Processing of Accumulated Liquid Radioactive Waste from BN-350 Reactor

It was found that the filtrate yielded by passing bottoms decantates through selective sorbents has the volume activity with respect to ¹³⁷Cs and ⁶⁰Co significantly greater than DK_b. A pretreatment of the bottoms before selective sorption was tested, which consisted in ozonation and subsequent filtration of the resulting precipitate. By the example of the liquid radioactive waste (LRW) decantate with the highest volume activity, it was shown that by combining the pretreatment with selective sorption it was possible to remove ¹³⁷Cs, ⁶⁰Co, and ⁵⁴Mn radionuclides from the decantate to the level under DK_b. Cementation of the slurries in the slurry/cement ratio of 0.3-0.7 was tested. It was proposed that the decantate freed from radionuclides be discharged into the Caspian Sea, and the slurry and secondary wastes yielded by decantate decontamination be included into cement compound.