Parameter Optimization and System Design of the Welding Power Supply for Resistance-Butt Welding of Nuclear Fuel Rod

2011 ◽  
Vol 201-203 ◽  
pp. 2661-2666
Author(s):  
Fang Quan Chen ◽  
Zu Wei Lin ◽  
Guo Wei Liang
Keyword(s):  
Nuclear Fuel ◽  
Power Supply ◽  
Welding Process ◽  
Capacitor Discharge ◽  
Butt Welding ◽  
Fuel Rod ◽  
Current Curve ◽  
Bridge Rectifier ◽  
And Control ◽  
Welding Power Supply

This paper firstly gives a brief description about the principle of resistance-butt welding of nuclear fuel rod, and it points out that the power supply is a key technology for welding process. According to the welding process and the welded material properties, capacitor discharge power supply is devised as welding power supply. The design of charging circuit of single-phase bridge rectifier with SCR and control circuit is finished. The process of power discharge is simulated and the parameters (capacitance C, charging voltage uc) are optimized with Matlab. By the welding experiments, it shows that the output current curve is suitable for resistance-butt welding of nuclear fuel rods, and the test results of welding samples entirely consistent with process requirements.

437 Visual Monitoring and Control of Butt Welding Process in MAG Welding

2010 ◽  
Vol 2010.18 (0) ◽  
pp. _437-1_-_437-3_
Author(s):  
Hideki ICHIKAWA ◽  
M.R. ZAHIDIN ◽  
Akira NINOMIYA ◽  
Yasuo SUGA
Keyword(s):  
Welding Process ◽  
Mag Welding ◽  
Monitoring And Control ◽  
Visual Monitoring ◽  
Butt Welding ◽  
And Control

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

2012 ◽  
Vol 217-219 ◽  
pp. 2070-2074
Author(s):  
Min Cai Liu ◽  
Fang Quan Chen ◽  
Xiao Xia Si ◽  
Biao Wang
Keyword(s):  
High Pressure ◽  
Nuclear Fuel ◽  
Welding Current ◽  
Tungsten Electrode ◽  
Positioning Accuracy ◽  
Arc Voltage ◽  
Fuel Rod ◽  
Voltage Curve ◽  
Current Curve

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.

Design and development of improved power quality based micro‐butt welding power supply

2017 ◽  
Vol 10 (7) ◽  
pp. 746-755 ◽  
Author(s):  
Thiruvenkadam Madhulingam ◽  
Thangavel Subbaiyan ◽  
Paramasivam Shanmugam ◽  
Shrinath Kannan
Keyword(s):  
Power Quality ◽  
Power Supply ◽  
Design And Development ◽  
Butt Welding ◽  
Welding Power Supply

scholarly journals Design and Research on Power Systems and Algorithms for Controlling Electric Underground Mining Machines Powered by Batteries

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 4060
Author(s):  
Artur Kozłowski ◽  
Łukasz Bołoz
Keyword(s):  
Power Systems ◽  
Power Supply ◽  
Internal Combustion Engines ◽  
Underground Mining ◽  
Test Stand ◽  
Research Network ◽  
Control Algorithms ◽  
Systems And Control ◽  
And Control ◽  
Supply Systems

This article discusses the work that resulted in the development of two battery-powered self-propelled electric mining machines intended for operation in the conditions of a Polish copper ore mine. Currently, the global mining industry is seeing a growing interest in battery-powered electric machines, which are replacing solutions powered by internal combustion engines. The cooperation of Mine Master, Łukasiewicz Research Network—Institute of Innovative Technologies EMAG and AGH University of Science and Technology allowed carrying out a number of works that resulted in the production of two completely new machines. In order to develop the requirements and assumptions for the designed battery-powered propulsion systems, underground tests of the existing combustion machines were carried out. Based on the results of these tests, power supply systems and control algorithms were developed and verified in a virtual environment. Next, a laboratory test stand for validating power supply systems and control algorithms was developed and constructed. The tests were aimed at checking all possible situations in which the battery gets discharged as a result of the machine’s ride or operation and when it is charged from the mine’s mains or with energy recovered during braking. Simulations of undesirable situations, such as fluctuations in the supply voltage or charging power limitation, were also carried out at the test stand. Positive test results were obtained. Finally, the power supply systems along with control algorithms were implemented and tested in the produced battery-powered machines during operational trials. The power systems and control algorithms are universal enough to be implemented in two different types of machines. Both machines were specially designed to substitute diesel machines in the conditions of a Polish ore mine. They are the lowest underground battery-powered drilling and bolting rigs with onboard chargers. The machines can also be charged by external fast battery chargers.

Enhancement of Heat Transfer Performance in Nuclear Fuel Rod Using Nanofluids and Surface Roughness Technique

2015 ◽  
Author(s):  
Kang Liu ◽  
Titan C. Paul ◽  
Leo A. Carrilho ◽  
Jamil A. Khan
Keyword(s):  
Heat Transfer ◽  
Surface Roughness ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Nuclear Fuel ◽  
Three Dimensional ◽  
Pressurized Water ◽  
Bulk Fluid ◽  
Fuel Rod ◽  
Dimensional Surface

The experimental investigations were carried out of a pressurized water nuclear reactor (PWR) with enhanced surface using different concentration (0.5 and 2.0 vol%) of ZnO/DI-water based nanofluids as a coolant. The experimental setup consisted of a flow loop with a nuclear fuel rod section that was heated by electrical current. The fuel rod surfaces were termed as two-dimensional surface roughness (square transverse ribbed surface) and three-dimensional surface roughness (diamond shaped blocks). The variation in temperature of nuclear fuel rod was measured along the length of a specified section. Heat transfer coefficient was calculated by measuring heat flux and temperature differences between surface and bulk fluid. The experimental results of nanofluids were compared with the coolant as a DI-water data. The maximum heat transfer coefficient enhancement was achieved 33% at Re = 1.15 × 105 for fuel rod with three-dimensional surface roughness using 2.0 vol% nanofluids compared to DI-water.

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