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Curing method of isotope <14>C

A solidification method and isotope technology, used in radioactive purification, nuclear engineering, etc., can solve the problems of strong gas mobility, environmental safety threat, and large gas volume, and achieve the effect of fast electrode reaction rate and cost reduction.

Active Publication Date: 2021-06-22
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during a nuclear reaction, 14 C will end with 14 In the presence of CO gas, the volume of the gas phase is larger than that of the solid phase, and the gas fluidity is strong, which is likely to pose a threat to environmental safety, which does not meet the principle of minimization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] (1) Weigh 1g of YSZ powder and press it into a diameter of 1cm 2 1. A disc with a thickness of 1000 μm was heat-treated at 1400 ° C for 20 hours to obtain a YSZ ceramic electrolyte, which was used as a ceramic membrane electrolytic cell support and electrolyte;

[0075] (2) Mix LST and SDC according to the mass ratio of 65:35, add 20wt% ethyl cellulose and add 3 mL of turpentine through alcohol per 2 g of the mixed mass of LST and SDC, add turpentine through alcohol and mix and grind for 5 hours. Into LST-SDC slurry; LSM and SDC are also mixed according to the mass ratio of 65:35, and 20wt% of ethyl cellulose is added, and 3ml of turpentine peroxide is added per 2g of the mixed mass of LSM and SDC. Mix and grind for 5 hours to make LSM-SDC slurry;

[0076] (3) Apply LST-SDC slurry on one side of the cell support (ie, YSZ ceramic electrolyte) as the cathode of the ceramic membrane electrolytic cell, with a thickness of 10 μm; coat the other side of the cell support with...

Embodiment 2

[0083] (1) Weigh 1g of YSZ powder and press it into a diameter of 1cm 2 1. A disc with a thickness of 800 μm was heat-treated at 1450° C. for 20 hours to obtain a YSZ ceramic electrolyte, which was used as a ceramic membrane electrolytic cell support and electrolyte;

[0084] (2) Mix LST and SDC according to the mass ratio of 65:35, add 20wt% ethyl cellulose and add 1 mL of turpentine through alcohol per 2 g of the mixed mass of LST and SDC, add turpentine through alcohol and mix and grind for 5 hours. Into LST-SDC slurry; LSM and SDC are also mixed according to the mass ratio of 65:35, and 20wt% ethyl cellulose is added, and 1ml of turpentine peroxide is added for every 2g of the mixed mass of LSM and SDC. Mix and grind for 5 hours to make LSM-SDC slurry;

[0085] (3) Apply LST-SDC slurry on one side of the single cell support (ie, YSZ ceramic electrolyte), as the thickness of the cathode of the ceramic membrane electrolytic cell is 50 μm; the other side of the single cell s...

Embodiment 3

[0092] (1) Press 1g of YSZ powder into a diameter of 1cm 2 1. A disc with a thickness of 500 μm was heat-treated at 1450° C. for 20 hours to obtain a YSZ ceramic electrolyte, which was used as a ceramic membrane electrolytic cell support and electrolyte;

[0093] (2) Mix LST and SDC according to the mass ratio of 65:35, add 20wt% ethyl cellulose and add 2 mL of turpentine through alcohol per 2 g of the mixed mass of LST and SDC, add turpentine through alcohol and mix and grind for 5 hours. Into LST-SDC slurry; LSM and SDC are also mixed according to the mass ratio of 65:35 and added 20wt% ethyl cellulose and 2ml turpentine peroxide per 2g according to the mixed mass of LSM and SDC. Mix and grind for 5 hours to make LSM-SDC slurry;

[0094] (3) Apply LST-SDC slurry on one side of the cell support as the cathode of the ceramic membrane electrolytic cell (ie, YSZ ceramic electrolyte), with a thickness of 100 μm; coat the other side of the cell support with LSM-SDC slurry As the...

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Abstract

The invention discloses a curing method of isotope <14>C. According to the method, gas containing <14>CO is introduced into a ceramic membrane electrolytic tank, <14>CO is reduced at a cathode in the ceramic membrane electrolytic tank, and solid <14>C powder is obtained. According to the method provided by the invention, on the basis of a high-temperature electrolysis technology of a ceramic membrane electrolytic tank, the <14>CO gas is directly electrolyzed at high temperature to remove oxygen elements so as to obtain solid <14>C powder, and the solid <14>C powder is compacted and sealed, so that the minimum separation of the <14>C in the stack irradiation radioactive graphite is finally realized.

Description

technical field [0001] This application relates to an isotope 14 The curing method of C belongs to the heap irradiation radioactive graphite 14 C handles the technical field of disposal. Background technique [0002] The minimization of radioactive waste is one of the basic principles of radioactive waste management. It is to minimize the amount and activity of radioactive waste by means of technical and management means, thereby limiting the related environmental impact and reducing Economic costs of waste management. [0003] Heap-illuminated radioactive graphite, which is bulky and contains a large amount of long-lived radionuclides, has become a difficulty in radioactive waste management. It is unreasonable and unfeasible in terms of economic cost and storage capacity if all these stacked radioactive graphites are disposed of geologically. In addition, pile-irradiated radioactive graphite waste contains a large number of nuclides with long half-lives, such as 14 C (...

Claims

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Application Information

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IPC IPC(8): G21F9/02
CPCG21F9/02Y02E60/36
Inventor 谢奎叶灵婷
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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