BISMUTH-213 RADIONUCLIDE OBTAINING METHOD Russian patent published in 2011 - IPC G21G1/08 

FIELD: power industry.

SUBSTANCE: solution containing radionuclides thorium-229, thorium-228 and daughter decay products of these radionuclides is bubbled with gas, thus extracting from them one of daughter radionuclides of thorium-228 - gaseous radon-220. Gas is supplied through aerosol filter to sorption device, and cleaned solution containing mixture of radionuclides thorium-228, thorium-229, as well as daughter decay products of these radionuclides are supplied to radiochemical processing by means ion-exchange resins in order to obtain target radionuclide bismuth-213. As bubbling gas there used is air and/or helium and/or argon and/or krypton and/or xenon. As sorption device there used is hollow volume the dimensions of which provide the residence time of radon-220, which is sufficient for its complete decay to stable radionuclide lead-208, or trap with activated carbon.

EFFECT: reducing the radiation dose intensity in the work area.

4 cl