METHOD OF PRODUCING ACTINIUM-227, THORIUM-228 AND THORIUM-229 FROM IRRADIATED RADIUM-226 Russian patent published in 2020 - IPC G21G1/06

Abstract RU 2716272 C1

FIELD: physics.

SUBSTANCE: invention relates to an agent for producing actinium-227, thorium-228 and thorium-229 from irradiated radium-226. Method involves irradiation with neutrons in an atomic reactor of radiation-stable compound of radium-226, dissolution of irradiated material in diluted nitric acid, deposition of radium-226 from solution by addition of excess concentrated nitric acid in form of radium-226 nitrate, separating thorium-228 and thorium-229 from the obtained solution by sorption on an anion-exchange resin followed by desorption of thorium-228 and thorium-229 with diluted nitric acid. Further, actinium-227 is separated from solution by sorption method using cation-exchange resin with subsequent desorption of actinium-227 with nitric acid solution and recycling of radium-226 for repeated irradiation. Radium-226 bromide is used as a radiation-stable compound for irradiation of radium-226 with neutrons.

EFFECT: high degree of extraction of actinium-227, thorium-228 and thorium-229, low losses of radium-226 and high efficiency and safety of the process.

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RU 2 716 272 C1

Authors

Lebedev Larion Aleksandrovich

Dates

2020-03-11—Published

2019-10-15—Filed