Application of Sorben-Tec system for rapid dosimetric determination of 137Cs and 222Rn in drinking water
Semenishchev V.S., Remez V.P., Glazyrin S.V.
Water: chemistry and ecology. 2019. No. 3-6. S. 113-119.
(In Russian. Links to the publication in the e-ljbrary are clickable in the Russian version of the news)
In 2017-2018, experts from the Chernobyl NPP and METOIL ran several joint laboratory tests to evaluate the efficiency of inorganic sorbents made by METOIL for processing floor drains at the Chernobyl NPP.
The test procedure included treatment of radioactively contaminated water in a two-stage sorption process: static sorption (sorbents are mixed in a liquid) and dynamic sorption (the liquid is filtered through a sorbent column). NIKET and MODIKS sorbents were provided for the tests.
The results of the test measurements showed that the total alpha containing radionuclide activity is less than 0.026 Bq/kg and the total beta and gamma containing radionuclide activity is 9.2 Bq/kg. The physical and chemical parameters after processing also met the water disposal criteria.
High sorption capacity of the sorbents used for the tests allows processing hundreds of water volumes with just one sorbent volume. At present, preparations are underway for full-scale tests at a pilot plant with a capacity of minimum 10 m3/day.
At a later stage, spent sorbents may be immobilized by inclusion into the cement matrix, which will substantially reduce the amount of radioactive waste to be buried.
At the Institute of Immunology and Physiology, Ural Branch of the Russian Academy of Sciences, research work was carried out to study the antianemic effect of the pharmacological composition Compoferron in an experiment on laboratory animals.
The report on the work done is available here.
The journal "Issues of Radiation Safety" published an article by V.A. Goryacheva, I.G. Tananaeva and D.P. Dergunov "Extraction of Cs-134,137 by cellulose-inorganic sorbent based on ferrocyanide-potassium ferrocyanide" Anfezh "from LRW containing sea water". The article shows that the use of a sorbent produced by OOO NPP "Eksorb" allows you to extract in one experiment more than 95% Be-7, Cs-134,137 and 75% Co-60 even from large samples (up to 1000 l) of sea water.
It is concluded that the Anfezh sorbent can be used on a pilot plant for LRW processing, which is being developed at DVZ Zvezda JSC.