Organic iodine remover

Patent metadata

Field	Value
Publication number	US-12340913-B2
Application number	US-202017433271-A
Country	US
Kind code	B2
Filing date	Jan 21, 2020
Priority date	Feb 25, 2019
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

As an organic iodine remover that removes organic iodine in a containment vessel of a nuclear reactor, an organic agent (for example, an ionic liquid, an interfacial active agent, a quaternary salt, or a phase transfer catalyst) having a function of dissolving and decomposing the organic iodine and retaining iodine is used. The organic iodine remover is a substance composed of a cation and an anion. The organic iodine remover is, in particular, an organic iodine remover in which, in a structure of the cation of the organic agent, carbon or oxygen is bonded to, via a single bond, to a phosphorus element, a sulfur element or a nitrogen element, the number of carbon chains is 2 or more, and an anionic structure is configured with a substance with high nucleophilicity. By using such an organic agent, the organic iodine is removed with an efficiency of 99% or more.

First claim

The invention claimed is:

1. An organic iodine remover that removes organic iodine in a containment vessel of a nuclear reactor,
wherein the organic iodine remover is a substance composed of a cation and an anion and liquid at a temperature between 100° C. and 200° C.,
the cation is a substance which dissolves methyl iodine,
the organic iodine remover is a substance in which
in a structure of the cation, carbon or oxygen is bonded, via a single bond, to a phosphorus element, a sulfur element or a nitrogen element, and
a structure of the anion has an anion charge present in a carbon element, a sulfur element, a nitrogen element, an oxygen element or a halogen element, and

the organic iodine remove is a substance in which the anion is composed of H 3 C − , H 2 RC − , HR 2 C − , R 3 C − , NC − , and RCC − , which has a charge present in the carbon element.

2. An organic iodine remover, that removes organic iodine in a containment vessel of a nuclear reactor, wherein
the organic iodine remover is a substance composed of a cation and an anion and liquid at a temperature between 100° C. and 200° C.,
the cation is a substance which dissolves methyl iodine,
the organic iodine remover is a substance in which
in a structure of the cation, carbon or oxygen is bonded, via a single bond, to a phosphorus element, a sulfur element or a nitrogen element, and
a structure of the anion has an anion charge present in a carbon element, a sulfur element, a nitrogen element, an oxygen element or a halogen element, and

the organic iodine remover is a substance in which the anion is composed of RS − , which has a charge present in the sulfur element.

3. An organic iodine remover that removes organic iodine in a containment vessel of a nuclear reactor, wherein
the organic iodine remover is a substance composed of a cation and an anion and liquid at a temperature between 100° C. and 200° C.,
the cation is a substance which dissolves methyl iodine,
the organic iodine remover is a substance in which
in a structure of the cation, carbon or oxygen is bonded, via a single bond, to a phosphorus element, a sulfur element or a nitrogen element, and
a structure of the anion has an anion charge present in a carbon element, a sulfur element, a nitrogen element, an oxygen element or a halogen element, and

the organic iodine remover is a substance in which the anion is composed of N 3 − , H 2 N − , HRN − , and R 2 N − , which has a charge present in the nitrogen element.

4. An organic iodine remover that removes organic iodine in a containment vessel of a nuclear reactor, wherein
the organic iodine remover is a substance composed of a cation and an anion and liquid at a temperature between 100° C. and 200° C.,
the cation is a substance which dissolves methyl iodine,
the organic iodine remover is a substance in which
in a structure of the cation, carbon or oxygen is bonded, via a single bond, to a phosphorus element, a sulfur element or a nitrogen element, and
a structure of the anion has an anion charge present in a carbon element, a sulfur element, a nitrogen element, an oxygen element or a halogen element, and

the organic iodine remover is a substance in which the anion is composed of HO − , NO 2 − , NO 3 − , RO − , RCO 2 − , RPO 3 − , RSO 3 − , RPO 4 − , R 2 PO 2 − , R 3 CO − , FO 3 − , ClO 3 − , BrO 3 − , IO 3 − , FO 4 − , ClO 4 − , BrO 4 − , and IO 4 − , which has a charge present in the oxygen element.

5. The organic iodine remover according to claim 1 , which is a substance in which the anion is composed of F − , Cl − , Br − , I − , F 3 − , Cl 3 − , Br 3 − , and I 3 − , which has a charge present in the halogen element.

6. The organic iodine remover according to claim 1 , which is a substance in which a part of a carbon chain R of the anion is composed of an oxygen bond.

7. The organic iodine remover according to claim 1 , which is a substance in which a part or all of a hydrogen element bonded to a carbon chain of the anion is substituted with a fluorine element.

8. The organic iodine remover according to claim 2 , which is a substance in which a part of the carbon chain R of the anion is composed of an oxygen bond.

9. The organic iodine remover according to claim 2 , which is a substance in which a part or all of a hydrogen element bonded to the carbon chain of the anion is substituted with a fluorine element.

10. The organic iodine remover according to claim 3 , which is a substance in which a part of the carbon chain R of the anion is composed of an oxygen bond.

11. The organic iodine remover according to claim 3 , which is a substance in which a part or all of a hydrogen element bonded to the carbon chain of the anion is substituted with a fluorine element.

12. The organic iodine remover according to claim 4 , which is a substance in which a part of the carbon chain R of the anion is composed of an oxygen bond.

13. The organic iodine remover according to claim 4 , which is a substance in which a part or all of a hydrogen element bonded to the carbon chain of the anion is substituted with a fluorine element.

14. A filtered containment venting apparatus for removing a radioactive substance comprising:
a filtered containment venting vessel including scrubbing water and a filter for removing a radioactive substance therein;
a venting pipe connected to a nuclear reactor pressure vessel;
an inlet pipe including an end connected to the venting pipe and another end introduced in the filtered containment venting vessel;
an outlet pipe connected to the filter in the filtered containment venting vessel;
an organic iodine remover disposed in the filtered containment venting apparatus,
wherein the organic iodine remover is an organic iodine remover according to claim 1 .

15. The filtered containment venting apparatus according to claim 14 , further comprising:
a storage container storing the organic iodine remover,
wherein the storage container is disposed outside the filtered containment venting vessel.

16. A filtered containment venting apparatus for removing a radioactive substance comprising:
a filtered containment venting vessel including scrubbing water and a filter for removing a radioactive substance therein;
a venting pipe connected to a nuclear reactor pressure vessel;
an inlet pipe including an end connected to the venting pipe and another end introduced in the filtered containment venting vessel;
an outlet pipe connected to the filter in the filtered containment venting vessel;
an organic iodine remover disposed in the filtered containment venting apparatus,
wherein the organic iodine remover is an organic iodine remover according to claim 2 .

17. A filtered containment venting apparatus for removing a radioactive substance comprising:
a filtered containment venting vessel including scrubbing water and a filter for removing a radioactive substance therein;
a venting pipe connected to a nuclear reactor pressure vessel;
an inlet pipe including an end connected to the venting pipe and another end introduced in the filtered containment venting vessel;
an outlet pipe connected to the filter in the filtered containment venting vessel;
an organic iodine remover disposed in the filtered containment venting apparatus,
wherein the organic iodine remover is an organic iodine remover according to claim 3 .

18. A filtered containment venting apparatus for removing a radioactive substance comprising:
a filtered containment venting vessel including scrubbing water and a filter for removing

Assignees

• Hitachi Ge Nuclear Energy Ltd

Inventors

• Fukui Sohei
• Tanaka Motoi
• Tanaka Masaaki
• Totsuka Fumio
• Hashimoto Tomoharu
• Tominaga Kazuo

Classifications

• G21C13/02

  Details · CPC title

• B01D53/70

  Organic halogen compounds · CPC title

• B01D53/02

  by adsorption, e.g. preparative gas chromatography {(solid sorbent compositions B01J20/00, preparation of inorganic compounds or elements C01)} · CPC title

• G21C19/303

  specially adapted for gases (decontamination of gases G21F9/02) · CPC title

• G21C13/022

  Ventilating arrangements · CPC title