Full-automatic equipment and method for testing helium diffusion coefficient of reactor material

A diffusion coefficient and reactor technology, applied in the direction of analyzing materials, measuring devices, surface/boundary effects, etc., can solve the problems of high requirements, short test time, high precision, and achieve the effect of high speed, wide test range and high precision

Active Publication Date: 2014-03-05
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology allows scientists or engineers to easily and precisely calculate how much helium diffuses into different types of material during reaction processes without being affected by factors such as temperature changes that affect its properties. It also includes an apparatus called Helmholtz device with two parts: one part detects helium's diffusivity while another part measures it's ability to penetrate through certain substances like water vapor (H2O). By measuring this property at both ends we are able to predict which type of chemical will react well when placed together under specific conditions.

Problems solved by technology

Technological Problem addressed in this patents relates to optimizing the use of different types of tests or apparatuses during research into new nuclear fuels made up mostly of certain elements like boron nitride composite materials. These materials have very small diffusivity values at room temperatures compared to other components making them difficult to determine accurately. Current methods require longer times before they become steady again leading to imprecision measurements. Time-lag techniques provide fast response speed while minimized environmental impacts overcomes these issues. However, current methods still lack precise control capabilities needed for optimal analysis of the heliox diffusion coefficient within specific materials.

Method used

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  • Full-automatic equipment and method for testing helium diffusion coefficient of reactor material
  • Full-automatic equipment and method for testing helium diffusion coefficient of reactor material
  • Full-automatic equipment and method for testing helium diffusion coefficient of reactor material

Examples

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Embodiment 1

[0035] This embodiment provides a fully automatic device for measuring the helium diffusion coefficient of reactor materials, the device includes a gas source control valve 1, a mass flow controller 2, a flow control valve 3, a low vacuum side vacuum gauge 4, a gas release control Valve 5, data acquisition card 6, test cell control valve 7, sample test cell 9, sample to be tested 10, high vacuum side vacuum gauge 12, vacuum pump 13, vacuum pump control valve 14, helium leak detector 15, computer 16, helium Gas source 17, relay (not marked in the figure) and pipeline etc.

[0036] The helium gas source 17 is connected to the inlet of the mass flow controller 2 through a pipeline, and the gas source supply is controlled by the gas source control valve 1 .

[0037] The low vacuum side 8 of the sample test cell is connected to the outlet of the mass flow controller 2, the vacuum gauge 4 on the low vacuum side and the deflation control valve 5, and the outlet of the mass flow controll

Embodiment 2

[0054] The test device and test method of the present embodiment are the same as those in Example 1, except that the helium gas detector is selected as a mass spectrometer, and the selected area of ​​the sample to be tested is 5 cm 2 , A graphite matrix sample with a thickness of 0.3 cm.

[0055] In this example, the graphite matrix sample is tested, and finally the diffusion coefficient is 9.96×10 -3 cm 2 / sec.

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Abstract

The invention provides full-automatic equipment and method for testing the helium diffusion coefficient of a reactor material. The equipment comprises a gas source control valve, a mass flow controller, a flow control valve, a low-vacuum-side vacuum gauge, a gas discharging control valve, a data acquisition card, a test pond control valve, a sample test pond, a sample to be tested, a high-vacuum-side vacuum gauge, a vacuum pump, a vacuum pump control valve, a helium detector, a computer, a helium gas source, a relay and pipelines; a test system comprises a data acquisition card and a computer; the computer is used for receiving, storing and analyzing data of the low-vacuum-side vacuum gauge, the high-vacuum-side vacuum gauge, the mass flow controller and the helium detector, and performing the process flow control on a system through controlling parts, so as to finally realize the automatic testing and result outputting. According to the equipment and the test method, the helium diffusion coefficient of the reactor material can be automatically tested and the problems of complexity in operation and poor test result repeatability in conventional test equipment are solved.

Description

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Claims

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Application Information

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Owner NANJING UNIV OF TECH
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