RADIOACTIVE WASTE LIQUID TREATMENT SYSTEM AND METHOD FOR TREATING RADIOACTIVE WASTE LIQUID

WIPO Patent Application WO/2021/152975

A1

Provided is a radioactive waste liquid treatment system whereby an α-nuclide remover for removing α nuclides contained in radioactive waste liquid can be made compact. Crud included in radioactive organic waste containing a positive ion exchange resin is dissolved using an organic acid aqueous solution (S1). The organic acid aqueous solution is exposed to ozone to decompose the organic acid (S4). α nuclides adsorbed on the radioactive organic waste in which crud has been dissolved are eluted by an organic acid salt aqueous solution (S2). The organic acid salt aqueous solution is exposed to ozone to decompose the organic acid salt (S4). A pH adjuster (acid, alkali, reducing agent, oxidizing agent for water conditioning) is poured into the radioactive waste liquid containing the α nuclides, generated in S4 (S5). A colloid of the α nuclides is formed in the radioactive waste liquid, which has been pH-adjusted to a range of no less than 4 to less than 8 by the pH adjuster. The colloid is removed using a filter (S6). Ions of the α nuclides contained in the radioactive waste liquid discharged from the filter are removed by an α-nuclide remover (S7).

ITOU TSUYOSHI (JP)

PCT/JP2020/043404

August 05, 2021

November 20, 2020

Click for automatic bibliography generation  

HITACHI GE NUCLEAR ENERGY LTD (JP)

G21F9/06; G21F9/12

JP2012163425A	2012-08-30
JP2002031697A	2002-01-31
JP2002506979A	2002-03-05
JP2015052522A	2015-03-19
JPH08271692A	1996-10-18
JP2014235130A	2014-12-15

POLAIRE I.P.C. (JP)

View/Download PDF      PDF Help

Previous Patent: IMAGING ELEMENT, IMAGING DEVICE, METHOD FOR OPERATING IMAGING ELEMENT, AND PROGRAM

Next Patent: CHOLESTERIC LIQUID CRYSTAL FILM