Nano ltration puri cation of liquid radioactive waste

The paper presents the results of testing the puri cation of real liquid radioactive waste from radionuclides - bottom residues of the Kola and Beloyarsk nuclear power plants (NPP), as well as low-level wastewater from the radiochemical building of the Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences (IPChE RAS) by the method of nano ltration (NF) using a polymer membrane manufactured by the Russian company «RM Nanotech». It has been shown that in the case of single-stage NF puri cation bottoms of the Kola (NPP), the coe cient of puri cation from ⁶⁰Co is 2.8, while puri cation from ¹³⁷Cs practically does not occur. When cleaning the bottom residues of the Beloyarsk NPP from ⁶⁰Co using a ve-stage scheme, a coe cient of puri cation from ⁶⁰Co equal to 388 was obtained. The combination of nano ltration puri cation and selective sorption of cesium on the ferrocyanide sorbent Temoksid-35 makes it possible to obtain a dry salt residue that is not related to radioactive waste. When using the method of nano ltration for the treatment of low-level wastewater of the Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, the degree of puri cation was, %: ¹³⁷Сs ~ 75; ⁹⁰Sr ~ 91; ²⁴¹Am ~ 99.5; ¹⁵²Eu ~ 91; ²³⁹Pu ~ 99.5.

nano ltration, polymer membrane, liquid radioactive waste, bottoms of NPP, puri cation, cesium, cobalt