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Manufacturing method of uranium dioxide-gadolinium oxide pellet standard substance

A standard material and manufacturing method technology, applied in the preparation of test samples, measuring devices, instruments, etc., can solve the problem of no standard material

Inactive Publication Date: 2013-06-19
CNNC JIANZHONG NUCLEAR FUEL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] There is no relevant standard material in China

Method used

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  • Manufacturing method of uranium dioxide-gadolinium oxide pellet standard substance
  • Manufacturing method of uranium dioxide-gadolinium oxide pellet standard substance
  • Manufacturing method of uranium dioxide-gadolinium oxide pellet standard substance

Examples

Experimental program
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Embodiment 1

[0106] The gadolinium-containing uranium dioxide pellets were calcined in a muffle furnace to form a gadolinium-containing U3O8 sample. Weighed 1.0 g of the sample, accurate to 0.0001 g, and placed it in a 100 mL quartz beaker, and added 4 mL of concentrated nitric acid along the wall of the beaker. Cover with a watch glass, heat on an electric heating plate to dissolve the sample completely, and steam to orange-red crystals, cool to room temperature, add 15mL of 0.5mol / L nitric acid solution to dissolve. Transfer the sample solution into a 25mL volumetric flask, wash the beaker 4 times with 0.5mol / L nitric acid solution, transfer each cleaning solution into a volumetric flask, dilute to volume, and shake well. Under the selected working conditions of the instrument, the working standard solution and the sample solution are sequentially introduced into the X-ray fluorescence spectrometer for measurement, and then the mass fraction of gadolinium oxide in the sample is calculated...

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Abstract

Belonging to a manufacturing method of a standard substance, the invention particularly relates to a manufacturing method of a uranium dioxide-gadolinium oxide pellet standard substance. The method comprises the steps of: (1) determining the content of gadolinium oxide; (2) conducting uncertainty evaluation; (3) synthesizing standard uncertainty; and (4) expanding uncertainty. The invention has the advantages that wavelength dispersive X ray fluorescence spectroscopy is employed in the present invention to establish the testing method for gadolinium oxide in gadolinium-containing pellets, and at the same time, the law of propagation of uncertainty is adopted to evaluate the uncertainty of a measurement result so as to ensure an accurate and reliable standard substance certified value. With the standard substance, an analysis method is evaluated and the analytical instrument is calibrated, the reliability of quality control in analytical measurement is improved, and the long-term use requirement in the future is satisfied.

Description

technical field [0001] The invention belongs to a method for manufacturing a standard substance, and in particular relates to the manufacture of a uranium dioxide-gadolinium oxide pellet standard substance. Background technique [0002] There is no relevant reference material in China. [0003] The standard material of uranium dioxide-gadolinium oxide pellets (hereinafter referred to as gadolinium-containing pellets) is made of nuclear-grade uranium dioxide powder and high-purity gadolinium oxide powder, and is prepared by using the existing manufacturing process of gadolinium-containing pellets. Gadolinium-containing sintered pellets with a mass of about 1 g. [0004] The difference between the development of gadolinium-containing pellet standard material samples and the existing manufacturing process of gadolinium-containing uranium dioxide pellets is that the mass of gadolinium-containing uranium dioxide pellets prepared by the existing process is about 7 grams, and the ...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N23/223G01N33/00
Inventor 张时红廖琪陈岚徐建平丁建波杨晓东
Owner CNNC JIANZHONG NUCLEAR FUEL
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