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Testing method of uranium content in UO2-BeO core block

A determination method and technology of uranium content, applied in the field of determination of uranium content in UO2-BeO pellets, can solve problems such as no public reports

Inactive Publication Date: 2017-07-07
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] About UO at home and abroad 2 -There is no public report on the research results of the determination method of uranium content in BeO pellets

Method used

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  • Testing method of uranium content in UO2-BeO core block
  • Testing method of uranium content in UO2-BeO core block
  • Testing method of uranium content in UO2-BeO core block

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Embodiment Construction

[0008] A kind of UO provided by the present invention according to specific embodiments below 2 - The determination method of uranium content in BeO pellets is further explained.

[0009] A kind of UO 2 -A method for the determination of uranium content in BeO pellets, comprising the steps of:

[0010] Step 1, sample dissolution:

[0011] Weigh UO 2 - BeO sample 0.2g, put in a 250mL glass beaker, add 10mL nitric acid into the beaker, cover with a watch glass, put it on a temperature-regulating electric heating plate, heat at 200°C for 15min, add 1mL hydrofluoric acid, continue heating for 15min, take Continue to heat and evaporate to dryness on the lower surface of the dish, add 40mL of phosphoric acid, continue to heat until the sample is completely dissolved, remove it, and cool to room temperature.

[0012] Step 2, sample determination:

[0013] Place the dissolved sample on an electromagnetic stirrer, add a stirrer, add 0.5mL sulfamic acid solution under stirring, and...

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Abstract

The invention belongs to the technical field of chemical detection, and particularly designs a testing method of uranium content in a UO2-BeO core block. The testing method includes steps of step 1, dissolving a sample; step 2, testing the sample; step 3, calculating the result. The testing method can exactly and rapidly test the uranium content in the UO2-BeO core block, the testing result can meet the requirement of the technical index; the relative standard bias is 0.05%.

Description

technical field [0001] The invention belongs to the technical field of chemical detection and specifically designs a UO 2 - Method for determination of uranium content in BeO pellets. Background technique [0002] Uranium is an element with an atomic number of 92 and its symbol U, the heaviest element found in nature. Three isotopes exist in nature, all radioactive and with very long half-lives. At present, the precision determination methods of uranium include coulometric method and potentiometric titration method. The coulometric method can measure both constant substances and trace substances. The original standard of this method is an ammeter and a timer. The current and time are easy to measure accurately, so the accuracy is high. However, the analysis time is long and it is not suitable for rapid analysis. The precision and accuracy of the ferrous reduction potassium dichromate oxidation potentiometric titration method are comparable to the coulometric method, and ...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N27/42
CPCG01N31/164G01N27/42
Inventor 唐威张庆明许娜
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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