Device for measuring content of equivalent water in cold spaces in fuel rod

A technology for measuring devices and fuel rods, which is applied in the directions of measuring devices, material separation, and analyzing materials, etc., can solve problems such as low detection efficiency, high detection cost, and difficult detection operation, shorten the stabilization time, improve detection efficiency, and improve The effect of the pressure bearing capacity of the device and the convenience of operation

Active Publication Date: 2017-07-07
中国原子能工业有限公司
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Problems solved by technology

[0010] In view of the above prior art, the present invention provides a device for measuring the equivalent water content in the internal cooling space

Method used

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  • Device for measuring content of equivalent water in cold spaces in fuel rod
  • Device for measuring content of equivalent water in cold spaces in fuel rod

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] The determination of the equivalent water in the fuel rod is essentially to measure the adsorbed water and hydrogen of each component in the fuel rod, mainly the adsorbed water, water is ubiquitous in the environment, and the general water content in the fuel rod is several hundred to several thousand micrograms , compared to the amount of water in the environment, it is very small, and the ambient humidity has a certain influence on the measurement. Therefore, to ensure the accuracy and reliability of the measurement data of the equivalent water content of the fuel rod, it is necessary to minimize the moisture content of each component of the detection device and Interference with moisture in the air.

[0031] The properties of the materials of the detection device components (including density, water absorption, air permeability, wat...

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Abstract

The invention relates to the field of technologies for measuring the content of equivalent water in cold spaces in fuel rods, in particular to a device for measuring the content of equivalent water in cold spaces in a fuel rod. A connecting piece of the device is connected with a first connector of the fuel rod by a first transparent tube, the upper end of the first connector of the fuel rod is connected with a second connector of the fuel rod by a pipeline, the fuel rod is clamped and heated by a tube electric furnace, and a upper end and a lower end of the fuel rod are nested in the first transparent tube and a second transparent tube; the second connector of the fuel rod is connected with a rod breaking apparatus by the second transparent tube, the rod breaking apparatus is sequentially connected with a sample storage machine and a reduction furnace, moisture carried by carrier gas can be reduced by the reduction furnace to obtain hydrogen, and the content of the equivalent water in the fuel rod can be measured by a gas chromatograph in hydrogen measurement modes. The device has the advantages that various components of the device can be effectively purged to adsorb water, the blank stabilization time can be shortened to the great extent, blank absolute values can be obviously reduced, interference of air moisture in operation procedures can be reduced, the pressure bearing capacity and the operational convenience of the device can be improved, and the detection efficiency can be enhanced.

Description

technical field [0001] The invention relates to the technical field of measuring the equivalent water content of the internal cooling space of fuel rods, in particular to a device for measuring the equivalent water content of the internal cooling space of fuel rods. Background technique [0002] In recent years, with the feedback on the operation of fuel assemblies in the stack, it can be seen that the damage of fuel rods is still one of the main problems in the reliable operation of fuel assembly stacks. Hydrogenation damage of fuel rod cladding tubes caused by excessive hydrogen and water content in rods is one of the main research issues. [0003] The equivalent water content in the internal cooling space of the fuel rod directly reflects the total water content in the fuel rod (including the water in each part of the fuel rod and the water converted from hydrogen, and the parts in the fuel rod include the inner wall of the cladding tube, UO 2 Pellets and cladding tubes ...

Claims

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/025
Inventor 陈长友唐育纲吴顺停陈道军周永忠冷铁岩陈岚
Owner 中国原子能工业有限公司
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