Speaker
Ladislav Vesely
(Faculty of Mechanical Engineering)
Description
Based on the requirements of F4E, an experimental device HELCZA (High Energy Load Czech Assembly) was designed for high heat flux cyclic loading of plasma-facing components of the ITER reactor, primarily for testing of the full-size first wall modules and divertor inner vertical targets.
Testing is carried out by a high power electron beam heating, and a deviation of the heat flux density at any point of the heated area must not exceed ±5% of the target value for the heated area. Due to Gaussian distribution of energy across the electron beam, the required high flatness requires irradiation of the area edges by the electron beam core, and the surface outside the heated area must be protected by the windows-type shielding frame absorbing approximately half the power of the beam, while the frame structure must be thin and flexible.
This paper brings a design of the HELCZA shielding frame for the divertor inner vertical targets irradiation by the electron beam with a power density of 40 MW/m22. The design includes the choice of the geometric shape of the frame, determines the frame heat load, and provides thermohydraulic calculations for the frame cooling including the determination of pressure losses and heat removal at full power failure (blackout). The design is accompanied by a basic description of the frame manufacturing process.
Co-authors
Jan Stepanek
(Faculty of Mechanical Engineering, Department of Energy Engineering, Czech Technical University In Prague, Prague 6, Czech Republic)
Ladislav Vesely
(Faculty of Mechanical Engineering, Department of Energy Engineering, Czech Technical University In Prague, Prague 6, Czech Republic)
Pavel Zacha
(Faculty of Mechanical Engineering, Department of Energy Engineering, Czech Technical University In Prague, Prague 6, Czech Republic)
