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Method for measuring uranium content in uranium molybdenum alloy

A method for measuring uranium content, which is applied in the field of uranium content determination, can solve the problem of less application of uranium alloys, and achieve the effect of high measurement accuracy

Pending Publication Date: 2019-03-29
CHINA NORTH NUCLEAR FUEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the potentiometric titration method is relatively mature and widely used, but the potentiometric titration method is mainly used in the determination of uranium content in uranium oxides, uranium fluorides, and uranium-silicon compounds, and is rarely used in uranium alloys.

Method used

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  • Method for measuring uranium content in uranium molybdenum alloy
  • Method for measuring uranium content in uranium molybdenum alloy
  • Method for measuring uranium content in uranium molybdenum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Step 1: Sample Dissolution

[0071] weigh m 5 =0.10011g sample, accurate to 0.01mg; put the sample in a high-waisted beaker, add 1mL of sulfuric acid, evaporate the sulfuric acid to nearly dry, and the sample is almost insoluble;

[0072] Then add 8 mL of nitric acid, cover with a watch glass, and heat to dissolve the sample on a temperature-adjusting electric heating plate; after the sample is dissolved, add 3 to 4 drops of hydrofluoric acid to ensure that the sample is completely dissolved and prevent the molybdenum water from being desorbed;

[0073] Take off the watch glass, continue heating until the nitric acid is evaporated to dryness, uranyl nitrate crystals appear at the bottom of the high-waisted beaker, add 35mL of phosphoric acid, continue heating until the uranyl nitrate crystals are completely dissolved and the solution becomes clear, cool to room temperature, and get sample solution;

[0074] Step 2: Sample Processing

[0075] Weigh the mass of the wei...

Embodiment 2

[0086] Step 1: Sample Dissolution

[0087] weigh m 5 =0.20045g sample, accurate to 0.01mg; put the sample in a high-waisted beaker, add 3mL of sulfuric acid, evaporate the sulfuric acid to nearly dry, and the sample is almost insoluble;

[0088] Then add 10mL of nitric acid, cover with a watch glass, and heat to dissolve the sample on a temperature-adjusting electric heating plate; after the sample is dissolved, add 3 to 4 drops of hydrofluoric acid to ensure that the sample is completely dissolved and prevent the molybdenum water from being desorbed;

[0089] Take off the watch glass, continue heating until the nitric acid is evaporated to dryness, uranyl nitrate crystals appear at the bottom of the high-waisted beaker, add 40mL of phosphoric acid, continue heating until the uranyl nitrate crystals are completely dissolved and the solution becomes clear, cool to room temperature, and get sample solution;

[0090] Step 2: Sample Processing

[0091] Weigh the mass of the wei...

Embodiment 3

[0102] Step 1: Sample Dissolution

[0103] weigh m 5 =0.29987g sample, accurate to 0.01mg; put the sample in a high-waisted beaker, add 5mL of sulfuric acid, evaporate the sulfuric acid to nearly dry, and the sample is almost insoluble;

[0104] Then add 10mL of nitric acid, cover with a watch glass, and heat to dissolve the sample on a temperature-adjusting electric heating plate; after the sample is dissolved, add 3 to 4 drops of hydrofluoric acid to ensure that the sample is completely dissolved and prevent the molybdenum water from being desorbed;

[0105] Take off the watch glass, continue heating until the nitric acid is evaporated to dryness, uranyl nitrate crystals appear at the bottom of the high-waisted beaker, add 45mL of phosphoric acid, continue heating until the uranyl nitrate crystals are completely dissolved and the solution becomes clear, cool to room temperature, and get sample solution;

[0106] Step 2: Sample Processing

[0107] Weigh the mass of the wei...

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Abstract

The invention relates to the technical field of uranium content measurement, and particularly discloses a method for measuring uranium content in a uranium molybdenum alloy. The method comprises the following steps of step 1: sample dissolution; step 2: sample processing; and step 3: result calculation. According to the method for measuring the uranium content in the uranium molybdenum alloy, thepotentiometric titration method is used for measurement, and the temperature and liquid junction potential do not affect the measurement, so that the measurement accuracy is high. The end point of titration is judged by potential jump, and is not affected by the color and the turbidity of the solution to be tested.

Description

technical field [0001] The invention belongs to the technical field of uranium content determination, and in particular relates to a method for determining uranium content in uranium-molybdenum alloys. Background technique [0002] Compared with oxide nuclear fuel, metal-type nuclear fuel is easier to reprocess spent fuel and has a higher uranium density, allowing the reactor to operate at a lower uranium abundance. However, metal uranium is easy to corrode, has poor processing performance, and the relative stability of metal uranium is not good when the temperature changes. It is one of the research hotspots in the field of nuclear fuel. The γ phase of the uranium-molybdenum alloy has good stability in a wide temperature range, and under the conditions of the reactor, the alloy also has a small amount of radiation swelling. [0003] The content of uranium in the uranium-molybdenum alloy has a significant impact on the performance of the uranium-molybdenum alloy. Therefore...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N1/28G01N1/38G01N1/44
CPCG01N1/28G01N1/38G01N1/44G01N31/164
Inventor 白海香张庆明杨俊莉
Owner CHINA NORTH NUCLEAR FUEL
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