M. Kovari
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View article: Improved erosion estimates for the STEP divertor
Improved erosion estimates for the STEP divertor Open
Net tungsten erosion and deposition profiles are simulated for the outer and inner lower divertor of STEP, a spherical prototype fusion reactor targeting ∼ 2040. In this contribution, previous modelling work [1] has been extended by studyi…
View article: Erosion estimates for the divertor and main wall components from STEP
Erosion estimates for the divertor and main wall components from STEP Open
The tungsten erosion within Spherical Tokamak for Energy Production (STEP) assuming tungsten main wall and tungsten divertor has been estimated with ERO at the inner and outer divertor, at the inner and outer midplane and at the outboard b…
View article: CHIMERA Fusion Technology Facility: Testing and Virtual Qualification
CHIMERA Fusion Technology Facility: Testing and Virtual Qualification Open
The Combined Heating and Magnetic Research Apparatus (CHIMERA) fusion technology test facility is under construction. The facility will be uniquely capable of semi-integral testing of fusion materials and component modules up to the size o…
View article: Isotope removal experiment in JET-ILW in view of T-removal after the 2nd DT campaign at JET
Isotope removal experiment in JET-ILW in view of T-removal after the 2nd DT campaign at JET Open
A sequence of fuel recovery methods was tested in JET, equipped with the ITER-like beryllium main chamber wall and tungsten divertor, to reduce the plasma deuterium concentration to less than 1% in preparation for operation with tritium. T…
View article: Preparing systems codes for power plant conceptual design
Preparing systems codes for power plant conceptual design Open
As power plant design programmes approach the transition between the pre-conceptual and conceptual design phases, the systems code PROCESS has been improved to incorporate more detailed plasma physics, engineering, and analysis modules. Un…
View article: The magnetic field, temperature, strain and angular dependence of the critical current density for Nb-Ti
The magnetic field, temperature, strain and angular dependence of the critical current density for Nb-Ti Open
A scaling law for J c in commercial Nb-Ti wire is proposed that describes its magnetic field, temperature and strain dependence. The scaling law is used to fit extensive measurements of the total strand critical current density, J c,TS ( B…
View article: Fast evaluation of the current drive efficiency by electron cyclotron waves for reactor studies
Fast evaluation of the current drive efficiency by electron cyclotron waves for reactor studies Open
The determination of the current driven by electron cyclotron waves is usually performed employing ray/beam tracing codes, which require as an input the magnetic equilibrium, the electron density and the electron temperature profiles on on…
View article: Tritium resources available for fusion reactors
Tritium resources available for fusion reactors Open
The tritium required for ITER will be supplied from the CANDU production in Ontario, but while Ontario may be able to supply 8 kg for a DEMO fusion reactor in the mid-2050s, it will not be able to provide 10 kg at any realistic starting ti…
View article: Dealing with uncertainties in fusion power plant conceptual development
Dealing with uncertainties in fusion power plant conceptual development Open
Although the ultimate goal of most current fusion research is to build an economically attractive power plant, the present status of physics and technology does not provide the performance necessary to achieve this goal. Therefore, in orde…
View article: Heat loads to the wall: the thermal conduction approach
Heat loads to the wall: the thermal conduction approach Open
Calculations of the heat flux carried by plasma to the wall of a magnetic fusion machine often assume that power flows only along the field lines, but this cannot be true in general. Instead, we treat the plasma as an anisotropic non-linea…
View article: A parameter study of time-varying tritium production in solid-type breeder blankets
A parameter study of time-varying tritium production in solid-type breeder blankets Open
Tritium production is of critical importance to prospective DT fusion power plants. Lithium ceramic and beryllium based solid-type breeder blankets are an option for supplying the tritium required to sustain the DT plasma. This research in…
View article: Reducing beryllium content in mixed bed solid-type breeder blankets
Reducing beryllium content in mixed bed solid-type breeder blankets Open
Beryllium (Be) is a precious resource with many high value uses, the low energy threshold (n,2n) reaction makes Be an excellent neutron multiplier for use in fusion breeder blankets. Estimates of Be requirements and available resources sug…
View article: Spatially and temporally varying tritium generation in solid-type breeder blankets
Spatially and temporally varying tritium generation in solid-type breeder blankets Open
High energy neutrons produced in future fusion reactors will cause significant transmutation reactions in the breeder blanket, including the important tritium breeding reactions. The reaction rate for a given reaction type depends on the n…