Method of treating radioactive waste resin and an equipment therefor

Patent metadata

Field	Value
Publication number	US-11810684-B2
Application number	US-202117410097-A
Country	US
Kind code	B2
Filing date	Aug 24, 2021
Priority date	Aug 25, 2020
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

The present invention relates to a method of separating and removing a radioactive nuclide, particularly, C-14 and tritium from a radioactive waste resin, and an equipment therefor. The method of treating a radioactive waste resin of the present invention includes recycling of condensate water from which a C-14 radionuclide in the condensate water is removed, into a treatment part for a radioactive waste resin.

First claim

What is claimed is:

1. A method of treating a radioactive waste resin, the method comprising:
(S1) condensing tritiated water-containing vapor in an exhaust gas derived from a treatment part for a radioactive waste resin, in a condensation part;
(S2) discharging and removing a gas comprising a C-14 radionuclide-containing compound in the exhaust gas from the condensation part; and
(S3) recycling tritiated water-containing condensate water in the condensation part into the treatment part for a radioactive waste resin.

2. The method of treating a radioactive waste resin of claim 1 , further comprising prior to step (S1),
(S0) heating the radioactive waste resin in the presence of tritiated water-containing moisture in the treatment part for a radioactive waste resin to generate an exhaust gas comprising tritiated water-containing vapor and a C-14 radionuclide-containing compound.

3. The method of treating a radioactive waste resin of claim 2 , wherein the heating utilizes microwaves.

4. The method of treating a radioactive waste resin of claim 1 , wherein, in step (S2), the gas comprising the C-14 radionuclide-containing compound is discharged in a gas phase by injecting an acid solution into condensate water in the condensation part.

5. The method of treating a radioactive waste resin of claim 1 , wherein, in step (S2), the C-14 radionuclide-containing compound discharged from the condensation part is removed by an adsorbent.

6. The method of treating a radioactive waste resin of claim 5 , further comprising separating and re-condensing the tritiated water-containing vapor remaining in the adsorbent from the adsorbent by heating the adsorbent to recycle into the condensation part.

7. The method of treating a radioactive waste resin of claim 1 , wherein step (S3) comprises controlling a supplying rate of the condensate water to maintain a volume of a storing solution to 10 vol % to 30 vol % based on a total volume of the radioactive waste resin in the treatment part for a radioactive waste resin.

8. The method of treating a radioactive waste resin of claim 1 , wherein step (S2) further comprises additionally condensing the tritiated water-containing vapor in the exhaust gas.

9. The method of treating a radioactive waste resin of claim 1 , further comprising sensing a flow amount of a gas comprising the C-14 radionuclide-containing compound in at least one section between step (S1) and step (S2), and after step (S2).

10. The method of treating a radioactive waste resin of claim 1 , further comprising (S4) removing tritiated water in the condensate water by discharging the tritiated water-containing condensate water in the condensation part.

11. The method of treating a radioactive waste resin of claim 1 , wherein the tritiated water comprises at least one selected from the group consisting of T 2 O, HTO and DTO.

12. The method of treating a radioactive waste resin of claim 1 , wherein the C-14 radionuclide-containing compound comprises 14 CO 2 .

Assignees

• Korea Atomic Energy Res

Inventors

• Lee Ki Rak
• Park Hwan Seo
• Park Geun Il
• Ahn Hong Joo
• Choi Jung Hoon
• Kang Hyun Woo
• Kim In Tae

Classifications

• G21F9/30 Primary

  Processing (separating different isotopes of the same chemical element B01D59/00) · CPC title

• B01D53/002

  by condensation · CPC title

• B01D53/04

  with stationary adsorbents {(B01D53/025 takes precedence)} · CPC title

• G21F9/08

  by evaporation; by distillation · CPC title

• G21F9/12 Primary

  by absorption; by adsorption; by ion-exchange · CPC title