| 摘要 |
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 |
