Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Elution method for reserved plutonium in PUREX process dirty solvent

An elution method and solvent technology, applied in the field of radioactive waste treatment, can solve the problems of increased degradation products, failure to return to process reuse, and unsatisfactory results, achieving good application prospects and good elution effects

Active Publication Date: 2020-10-30
CHINA INSTITUTE OF ATOMIC ENERGY
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the plutonium content, degradation product content, and total radioactive content all exceed the standard, this high plutonium-retained contaminated solvent can neither be discharged to the waste liquid treatment unit, nor can it be returned to the process for reuse
What's more serious is that as the storage time increases, due to the effects of irradiation, metal ion catalysis, etc., the degradation products in the polluted solvent will further increase, and the retained plutonium will be more difficult to elute (currently, more The method is to use Na2CO3 solution, nitric acid solution or tetravalent uranium solution for plutonium elution treatment, but the effect is often not ideal)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Elution method for reserved plutonium in PUREX process dirty solvent
  • Elution method for reserved plutonium in PUREX process dirty solvent
  • Elution method for reserved plutonium in PUREX process dirty solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The 2BW material liquid obtained from a thermal experiment in the PUREX process technology research of China Institute of Atomic Energy is used as the processing object. The feed solution is the polluted solvent with excessive plutonium content obtained from the plutonium purification cycle. During the test, dilute acid solution, tetravalent uranium solution, N,N-dimethylhydroxylamine solution and sodium carbonate solution were used to elute plutonium. Its main chemical composition is: 30% (volume percentage) tributyl phosphate (TBP) and 70% (volume percentage) hydrogenated kerosene, in which plutonium content is 0.057g / L, nitric acid content is 0.03mol / L, dibutyl phosphate The content of ester acid (DBP) is 0.90×10 -3 mol / L, monobutyl phosphate (MBP) content is 2.30×10 -4 mol / L, the contents of other degradation products and metal ions were not determined. Before this experiment, the material solution had been placed for more than 4 years, and its appearance was a ye...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of radioactive waste treatment, and relates to an elution method for reserved plutonium in a PUREX process dirty solvent. The elution method comprises thestep of adding a solution containing glutaryl imide dioxime, tetramethylammonium hydroxide and NaOH into the dirty solvent for treatment. By utilizing the elution method for reserved plutonium in thePUREX process dirty solvent, plutonium can be better eluted and recovered from the PUREX process dirty solvent.

Description

technical field [0001] The invention belongs to the technical field of radioactive waste treatment, and relates to a method for eluting plutonium retained in a PUREX process polluted solvent. Background technique [0002] The PUREX (Plutonium Uranium Reduction Extraction) process is currently the only commercial spent fuel reprocessing process. The main purpose of this process is to extract unburned or newly generated fuel (usually uranium and plutonium) from spent fuel, and at the same time separate some useful nuclides (such as neptunium-237, which is used for the production of plutonium-238, etc.). The process is a multi-cycle solvent extraction process, the aqueous phase is nitric acid solution containing metal ions, the organic phase extractant is tributyl phosphate (TBP), and the diluent is chemically inert hydrogenated kerosene, hydrogenated tetrapropylene (TPH) or normal dodecane etc. [0003] In this process, TBP-kerosene-HNO 3 The system will undergo chemical an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G21F9/06G21F9/12G21F9/00C22B60/04C22B7/00
CPCG21F9/12G21F9/06G21F9/007C22B60/04C22B7/006Y02P10/20Y02W30/50Y02E30/30
Inventor 杨素亮杨志红朱礼洋柳倩田国新周今
Owner CHINA INSTITUTE OF ATOMIC ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com