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Method for improving 2A process plutonium concentration multiple in Purex flow

A technology of enrichment ratio and process, which is applied in the field of improving the enrichment ratio of plutonium in the 2A process of the Purex process, can solve the problems such as the specific adjustment method of the process parameters is not given, and achieve the effect of reducing the loss of plutonium, significant economic benefits, and simple methods

Active Publication Date: 2011-10-05
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document does not give specific adjustment methods for process parameters.

Method used

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  • Method for improving 2A process plutonium concentration multiple in Purex flow
  • Method for improving 2A process plutonium concentration multiple in Purex flow

Examples

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Effect test

Embodiment 1

[0017] Such as figure 1 As shown, when the 2AF plutonium concentration is 1.60g / L, the uranium concentration is 0.9g / L, the acidity is 4.7mol / L, the extractant is 30% TBP / kerosene, the detergent is 1mol / L nitric acid, and the flow ratio is 8 levels of extraction and 7 levels of washing. 2AF:2AX:2AS=8:1:0.4, the plutonium concentration is concentrated 8 times, and the plutonium yield is 99.95%.

Embodiment 2

[0019] Such as figure 1 As shown, the 2AF plutonium concentration is 1.65g / L, the uranium concentration is 1.14g / L, the acidity is 4.0mol / L, the extractant is 30% TBP / kerosene, the detergent is 1mol / L nitric acid, the 8-stage extraction and the 7-stage washing, the flow ratio is 2AF :2AX:2AS=7:1:0.5, the concentration of plutonium is concentrated 7.5 times, the yield of plutonium is 99.97%.

Embodiment 3

[0021] Such as figure 1 As shown, 2AF plutonium concentration is 1.65g / L, uranium concentration 1.14g / L, acidity 5.0mol / L, extractant 30% TBP / kerosene, detergent 1mol / L nitric acid, 8 levels of extraction and 7 levels of washing, flow ratio 2AF :2AX:2AS=7:1:0.45, the concentration of plutonium is concentrated 6.8 times, the yield of plutonium is 99.91%.

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Abstract

The invention belongs to the technical field of nuclear fuel reprocessing, and in particular relates to a method for improving 2A process plutonium concentration multiple in a Purex flow. By the method, the 2AF feed acidity is improved to be 3.8-5mol / L, and a flow ratio of 2AF to 2AX to 2AS is (7-8):1:(0.4-0.5). By the method, the plutonium concentration of the 2AP can be more than 10g / L.

Description

Technical field [0001] The invention belongs to the technical field of nuclear fuel post-processing, and specifically relates to a method for increasing the plutonium enrichment ratio of the 2A process in the Purex process. Background technique [0002] In the Purex process, the plutonium purification cycle is to extract and separate the plutonium intermediate product liquid 1BP from which uranium and fragment elements have been initially separated to further remove uranium and fragment elements to obtain a purer plutonium concentrate. The extraction of 2A plutonium is to extract plutonium in countercurrent contact with 2AF, which is made by adjusting the price and acid of 1BP and extracting agent (30% TBP / kerosene), and remove the fragment elements with detergent 2AS. [0003] In order to meet the plutonium concentration requirement of plutonium oxalate precipitation at the plutonium tail, the plutonium concentration of 2AP must be greater than 10g / L. For the current plutonium pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B60/04
Inventor 罗方祥刘协春肖松涛兰天杨贺叶国安张虎李高亮
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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