DEVICE FOR CONCENTRATION OF THE IMPURITIES IN URANIUM HEXAFLUORIDE Russian patent published in 2008 - IPC C01G43/06 

FIELD: chemical industry; atomic industry; other industries; methods and the devices of determination of the impurities in the gaseous uranium hexafluoride.

SUBSTANCE: the invention is pertaining to the field of the analysis of the materials, in particular, to the methods of determination of the content of the impurities in the gaseous uranium hexafluoride and may be used at the enterprises of the nuclear-fuel cycle, for example, at the sublimating or separating works. The device works as follows: the concentration device is connected to the gaseous mass-spectrometer, set the temperature of the liquid refrigerant in the chambers accordingly - minus 50°С and minus 80°С at usage of two chambers (1 and 2), and minus 80°С at usage of one chamber. Keep the device within not less than 20-30 minutes for achievement of the equilibrium distribution of the temperature gradient along the length of the pipe duct (3). By opening the batching valve (5) conduct the flooding of the uranium hexafluoride with the impurities contained in it into the device of concentration. At that the condensation of UF₆ on the internal surface of the pipe duct takes place. The degree of the concentration of the impurities is proportional to ratio of the uranium hexafluoride flows at the device inlet and outlet and may be equal to 1000 ÷ 1500 times. At that duration of the continuous completely autonomous operation of the device is limited by the complete filling-up of the pipe duct with the solid uranium hexafluoride and makes at the continuous flooding of UF₆more than 6 days. The technical result of the invention is development of the more simple and reliable device for concentration of the impurities with stable and completely predictable distribution of the temperature along the length of the pipe duct of condensation and the increased duration of the autonomous operation of the device.

EFFECT: the invention ensures development of the more simple and reliable device for concentration of the impurities with stable and completely predictable distribution of the temperature along the length of the pipe duct of condensation and the increased duration of the autonomous operation of the device.

6 cl, 1 tbl, 2 dwg, 1 ex