RADIONUCLIDE SEPARATION METHOD AND RADIONUCLIDE SEPARATION DEVICE

WIPO Patent Application WO/2017/203567

A1

The purpose of the present invention is to provide a method for the separation of radionuclides, said method allowing for radionuclides to be separated more easily while maintaining a separation rate comparable to or higher than that of conventional methods, and a separation device for executing said method. The radionuclide separation method according to the present invention is a method for separating radionuclides to be separated from highly radioactive wastewater containing radionuclides to be separated, the method including: a radioactive wastewater solidification step for vaporizing the liquid-phase component of the highly radioactive wastewater so as to produce a highly radioactive solid; a radionuclide fluoride conversion step in which fluorine gas acts upon the highly radioactive solid so as to convert the target radionuclides in the highly radioactive solid into a fluoride; and a radionuclide fluoride volatilization/separation step in which the radionuclide fluoride is volatilized and separated by being heated to a temperature such that the saturation vapor pressure of the radionuclide fluoride being separated is equal to or greater than a partial pressure calculated from the radionuclide fluoride content of the highly radioactive solid but is less than atmospheric pressure.

KANI YUUKO (JP)
SASAHIRA AKIRA (JP)
WATANABE DAISUKE (JP)

PCT/JP2016/065182

November 30, 2017

May 23, 2016

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HITACHI LTD (JP)

G21F9/06; C22B5/12; C22B25/02; C22B34/14; C22B59/00; G21F9/08

JPH02201199A	1990-08-09
JPS5684600A	1981-07-09
JP2002357694A	2002-12-13
JP2011179820A	2011-09-15
JP2013101066A	2013-05-23

POLAIRE I.P.C. (JP)

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