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Molten Pool Coolability: COMECO Experiments
10th International Conference on Nuclear Engineering, Volume 3, 2002A series of experiments, named COMECO (COrium MElt COolability) were conducted at RIT (Royal Institute of Technology) in which molten core pools were quenched by establishing a water layer onto the top of the molten pool and by injection of water from the bottom delivered through a downcomer from the water overlayer.
M. J. Konovalikhin +2 more
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Quenching Behaviour of Top Flooded Molten Pool
International Journal of Nuclear Energy Science and Engineering, 2014During a severe accident in a nuclear reactor, the core can melt and the melt can be relocated into the lower head forming a melt pool. If the vessel fails, the molten corium can be relocated in the containment cavity forming a melt pool. Such a pool or bed, if not quenched in time, may interact with the concrete basement of the cavity causing its ...
P. P. Kulkarni, A. K. Nayak
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Dynamics of keyhole and molten pool in laser welding
Journal of Laser Applications, 1998In laser and electron-beam welding, a deep cavity called a keyhole or beam hole is formed in the weld pool due to the intense recoil pressure of evaporation. The formation of the keyhole leads to a deep penetration weld with a high aspect ratio and this is the most advantageous feature of welding by high-energy-density beams. However, a hole drilled in
Akira Matsunawa +4 more
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Transient Thermocapillary Convection in a Molten or Weld Pool
Journal of Manufacturing Science and Engineering, 2012This study presents a numerical scenario for the effect of thermocapillary convection on the transient, two-dimensional molten pool shape during welding or melting. Tracing the melting process is necessary to achieve a better and more complete understanding of the physical mechanism of welding.
P. S. Wei +3 more
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Temperature field simulation of the molten pool in SEAM
The International Journal of Advanced Manufacturing Technology, 2017Short electric arc machining (SEAM) technology is a complex process involving arc physics, heat and mass transfer, metal melting, and solidification, which is characterized by locality, instantaneity, and unsteady states. The energy distribution as well as both the shape and size of the molten pool has an important influence on the quality of surfaces ...
Xuezhi Li +3 more
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Mathematical Modelling of Molten Pool in Arc Welding
1992A mathematical model of arc weld pool has been discussed in this paper. In the model analysis, the heat flow in welding is numerically analyzed to estimate the molten pool size, and a surface tensional balance equation for the molten pool is solved numerically to obtain a weld geometry.
Takayoshi Ohji +2 more
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Analysis of Molten Pool Characteristics on Hybrid GMAW Process
Asian Journal of Research in Social Sciences and Humanities, 2017This paper presents a complementary experimental and numerical investigation of thermal and welds bead characteristics of GMAW for flat wire electrode (FE-GMAW). The welding parameters for the FE-GMAW process are Welding Current (I), Stick out Distance (SD), Welding Speed (WS), Gas flow rate (Q), Welding feed rate (f) and Dimensions of the Flat ...
K Sripriyan +3 more
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Quenching behavior of molten pool with different strategies – A review
AIP Conference Proceedings, 2016After the major severe accident in nuclear reactor, there has been lot of concerns regarding long term core melt stabilization following a severe accident in nuclear reactors. Numerous strategies have been though for quenching and stabilization of core melt like top flooding, bottom flooding, indirect cooling, etc.
null Shrikant +3 more
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Effect of laser power on molten pool evolution and convection
Numerical Heat Transfer, Part A: Applications, 2020The cladding layer formed by laser cladding is formed by solidification of the molten pool. The quality of the cladding layer is directly determined by the evolution of the molten pool.
Boxue Song +4 more
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Stability of molten pool in plasma welding with a penetrating arc
Welding International, 1998(1998). Stability of molten pool in plasma welding with a penetrating arc. Welding International: Vol. 12, No. 4, pp. 303-305.
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