Methods for dissolving solids

A solution of carbonate and bicarbonate ions with potassium and cesium ions effectively dissolves solids in nuclear facilities, addressing the inadequacies of existing methods and enhancing the solubility of metallic elements, thereby preventing blockages and improving waste circulation.

JP2026062011APending Publication Date: 2026-04-09JAPAN NUCLEAR FUEL CO LTD(JNF) +1
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-09-30
Publication Date
2026-04-09

AI Technical Summary

Technical Problem

Existing methods for dissolving solids adhering to the inner walls of components in nuclear facilities, such as tank-like and tubular members, are inadequate and require specialized equipment, necessitating a simpler and more effective solution.

Method used

A method using a solution containing carbonate and bicarbonate ions, along with potassium and cesium ions, to dissolve solids generated in nuclear facilities, particularly those comprising metallic elements like iron, yttrium, zirconium, and plutonium, by forming dibutyl phosphate complexes.

Benefits of technology

The method effectively dissolves solids in nuclear facilities, reducing the risk of blockages and facilitating the circulation of radioactive waste, with superior solubility compared to conventional sodium hydroxide-based solutions.

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Abstract

The objective is to provide a method for dissolving solids that is excellent at dissolving solids generated in nuclear facilities. [Solution] A method for dissolving a solid generated at a nuclear facility, comprising dissolving the solid in a solution containing at least one of carbonate ions and bicarbonate ions, and at least one of potassium ions and cesium ions.
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Citation Information

Patent Citations

  • Treating method for radioactive waste

    JP2001174590A

  • Method for dissolving solids formed at nuclear facilities

    JP2004526128A

  • Two-phase-separated molten salt

    JP2014173172A

  • Method foe removing radioactive substance

    JP2016142599A