METHOD TO PRODUCE RADIONUCLIDE BISMUTH-212 Russian patent published in 2013 - IPC G21G4/08 

FIELD: power engineering.

SUBSTANCE: ion-exchange resin is added into a solution containing thorium radionuclide and its daughters, afterwards the solution is decanted, and the ion-exchange resin is dried and placed in a reactor, through which gas is sent, removing one of thorium-228 daughters from the reactor - gaseous radionuclide radon-220, and gas is sent via an aerosol filter into a sorption device, where as a result of radioactive decay, radionuclide lead-212 is accumulated, which after lead-212 activity attainment of saturation is desorbed from the walls of the sorption device by an acid solution, and the produced solution is sent to a column with ion-exchange resin, from which the daughter bismuth-212 is periodically washed. The initial solution may be a mixture of thorium isotopes - thorium-228, thorium-229, thorium-232. Gas for system blowdown is air and/or nitrogen and/or helium and/or argon and/or krypton and/or xenon. The sorption device is a vessel or vessels, the volume of which provide for the time of radon-220 stay sufficient for its complete decay into the radionuclide lead-212.

EFFECT: reduced labour intensiveness of the process to produce a target radionuclide bismuth-212.

6 cl