Bases for Transport Analysis of Toroidal Plasmas 6. Summary

弘司, 山田; 浩, 白井; 秀信, 竹永; 清政, 渡邊; 謙治, 田中

doi:10.1585/jspf.79.916

Cited by 2 publications

(3 citation statements)

References 17 publications

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“…In both codes, the steady-state burning plasma operation is achieved by the feedback control of density fuelling and external heating power control. The impurity dynamics [14] is also included in both codes.…”

Section: Simulation Models Of Itb Confinementmentioning

confidence: 99%

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Burning plasma simulation and environmental assessment of tokamak, spherical tokamak and helical reactors

et al. 2009

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Reference 1-GWe D-T reactors; tokamak TR-1, spherical tokamak ST-1 and helical HR-1 reactors, are designed using PEC (Physics Engineering Cost) code, and their plasma behaviors with Internal Transport Barrier (ITB) operations are analyzed using TOTAL (Toroidal Transport Analysis Linkage) code, which clarifies the requirement of deep penetration of pellet fueling to realize steady-state advanced burning operation. In addition, economical and environmental assessments were performed using extended PEC code, which shows the advantage of high beta tokamak reactors in COE and the advantage of compact spherical tokamak in lifetime CO 2 emission reduction. Comparing with other electric power generation system, the cost of fusion reactor is higher than that of fission reactor, but on the same level of oil thermal power system. The CO 2 reduction can be achieved in fusion reactors same as in the fission reactor. The EPR of high-beta tokamak reactor TR-1 could be higher than that of other systems including fission reactor. These systematic design and comparative simulation analyses on both tokamak and helical reactors can be done by the help of the above two codes.

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Section: Simulation Models Of Itb Confinementmentioning

confidence: 99%

“…Using these models, analyses have already been carried out focusing on HFS pellet injection effects to give easy access to the ITB regime [8]. The NTM and impurity transport are also investigated using this TOTAL code [13,14].…”

Section: Simulation Models Of Itb Confinementmentioning

confidence: 99%

Burning plasma simulation and environmental assessment of tokamak, spherical tokamak and helical reactors

et al. 2009

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“…During arc welding, four states of matter, including solid, liquid, gas and plasma, simultaneously exist and mutually interact within a volume of only 1 cm 3 . The temperature widely ranges approximately between 20 000 K in the arc plasma, 3000 K in the tungsten cathode, 2000 K in the molten steel and room temperature in the surroundings [1]. Due to the recent remarkable progress in computer simulations and observation techniques, it has become possible to understand the phenomena in arc welding processes quantitatively [2,3].…”

Section: Introductionmentioning

confidence: 99%

Time-dependent calculations of molten pool formation and thermal plasma with metal vapour in gas tungsten arc welding

Tanaka

Yamamoto

Tashiro

et al. 2010

J. Phys. D: Appl. Phys.

100

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A gas tungsten arc (GTA) was modelled taking into account the contamination of the plasma by metal vapour from the molten anode. The whole region of GTA atmosphere including the tungsten cathode, the arc plasma and the anode was treated using a unified numerical model. A viscosity approximation was used to express the diffusion coefficient in terms of viscosity of the shielding gas and metal vapour. The transient two-dimensional distributions of temperature, velocity of plasma flow and iron vapour concentration were predicted, together with the molten pool as a function of time for a 150 A arc current at atmospheric pressure, both for helium and argon gases. It was shown that the thermal plasma in the GTA was influenced by iron vapour from the molten pool surface and that the concentration of iron vapour in the plasma was dependent on the temperature of the molten pool. GTA on high sulfur stainless steel was calculated to discuss the differences between a low sulfur and a high sulfur stainless steel anode. Helium was selected as the shielding gas because a helium GTA produces more metal vapour than an argon GTA. In the GTA on a high sulfur stainless steel anode, iron vapour and current path were constricted. Radiative emission density in the GTA on high sulfur stainless steel was also concentrated in the centre area of the arc plasma together with the iron vapour although the temperature distributions were almost the same as that in the case of a low sulfur stainless steel anode.

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Bases for Transport Analysis of Toroidal Plasmas 6. Summary

Cited by 2 publications

References 17 publications

Burning plasma simulation and environmental assessment of tokamak, spherical tokamak and helical reactors

Burning plasma simulation and environmental assessment of tokamak, spherical tokamak and helical reactors

Time-dependent calculations of molten pool formation and thermal plasma with metal vapour in gas tungsten arc welding

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