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

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 ...

AI Technical Summary

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 of fuel rods, which is used to solve the problems of high detection cost, low detection efficiency, and difficult detection operation in the prior art.

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