The Sealing Welding of Helium-Filled Hole on Nuclear Fuel Rod

Abstract:

The welding which is used to seal the hole on the nuclear fuel rod is performed in a chamber which is filled with high-pressure helium. Experiments were done with different current and distance of tungsten and the end plug. Each current curve and voltage curve was analyzed. The results show that the effect of increasing the welding current or shortening the distance between the tungsten electrode and the end plug on the arc is that arc voltage is smaller and the arc stability is improved. The plan that positioning head is composed of two parts was put forward to control the fuel rod positioning accuracy. By means of properly choosing and controlling the parameters, the quality of welding is certainly improved and the rate of rejection is declined.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 2070-2074
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.2070
• Online since: November 2012
• Authors: Min Cai Liu, Fang Quan Chen, Xiao Xia Si, Biao Wang
• Keywords: Nuclear Fuel Rod, TIG, Tungsten Electrode, Welding Current

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