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CRYOGENIC RADON CONCENTRATION
Abstract
It was experimentally shown that using liquid nitrogen and a radioactive source, radon can be concentrated to high levels. A simple device has been proposed, that allows pre-concentration of radon at liquid nitrogen temperature. The essence of the device is based on the transformation of gaseous radon into a liquid. It is known that liquid nitrogen has a boiling point (-195,75) ??, and gaseous radon turns into liquid at (-62) ??, and at (-70) ?? turns into a solid state. Thus, the low temperature of liquid nitrogen significantly exceeds the temperature. Liquefaction and hardening of radon. Therefore, if you put radioactive an emanating source, for example, pieces of uranium ore, into a thermally insulated container, such as a thermos or a Dewar vessel in which liquid nitrogen is poured, then radon will accumulate at the bottom of the container in a solid state. As the liquid nitrogen evaporates, gaseous radon will be concentrated inside the tank. The resulting radon can be transferred using a known procedure in the repository for subsequent use as intended. The technical result is to increase the efficiency of obtaining radon with emanation and the use of the device directly in stationary conditions, for example, in medical institutions.
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References6
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Khristoforova S.E., Stepanov. V.E. Cryogenic radon concentrator. Problems and prospects of development of the Arctic zone of North-East of Russia: Proceedings of International scientific and practical conference, Anadyr, 5-6 April 2018, / NEFU ed.by E. I. Mikhailova. – Anadyr: BSF NEFU, 2018. – M.: "Buki Vedi", 2018. - 231 p. (p. 45-47).)
Khristoforova S. E., Stepanov V. E. Patent of the Russian Federation №2650177 C1
Khristoforova S. E., Stepanov V. E. Patent of the Russian Federation №175480 C1
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