A5113622057- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Spacecraft and Cryogenic Technologies
- Fusion materials and technologies
- Nuclear reactor physics and engineering
- Advanced Thermodynamic Systems and Engines
- Electrocatalysts for Energy Conversion
- Physics of Superconductivity and Magnetism
- Fuel Cells and Related Materials
- Advancements in Solid Oxide Fuel Cells
- Superconductivity in MgB2 and Alloys
- Orthopaedic implants and arthroplasty
- Dental materials and restorations
- Frequency Control in Power Systems
- 2D Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Dental Implant Techniques and Outcomes
- Advanced battery technologies research
- Refrigeration and Air Conditioning Technologies
- Modeling, Simulation, and Optimization
- Chemical Looping and Thermochemical Processes
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Advanced Condensed Matter Physics
ITER
2011-2025
Hongik University
2023
Korea Institute of Fusion Energy
2006-2010
Samsung (South Korea)
1997-2007
Daewoo Electronics (South Korea)
2006
Korea Basic Science Institute
2005
Air Liquide (France)
2005
Pohang University of Science and Technology
2003
Kaohsiung Veterans General Hospital
2003
Full transposition of superconducting wires within a conductor may not be requirement for high temperature superconductor (HTS) magnet fusion applications. Already, conduction-cooled 20 T model coil built with non-transposed HTS stacks has been demonstrated by Commonwealth Fusion Systems (CFS). Here, we discuss 3 possible stacked cryogen-cooled concepts toroidal field (TF) The first one is somewhat like LTS conductors, the second, are capped copper stabilizer, last one, only without copper....
The ITER cryoplant is composed of helium and nitrogen refrigerators generator combined with 80 K loop plants external purification systems. Storage recovery the inventory provided in warm cold (80 4.5 K) tanks.The conceptual design has been completed, technical requirements defined for industrial procurement contracts signed industry. Each contract covers design, manufacturing, installation commissioning. Design under finalization manufacturing started. First deliveries are scheduled by end...
The ITER superconducting (SC) magnet system, which consists of central solenoid coils, toroidal field (TF) TF structures, and poloidal correction is cooled by supercritical helium (SHe) circuits located in dedicated auxiliary cold boxes (ACBs) the cryodistribution (CD). Due to increase nuclear heat load during deuterium-tritium plasma phase, necessary cooling power maintain thermal stability system can be beyond presently designed contracted specification cryoplant (LHe liquid nitrogen...
Abstract The ITER Cryogenic System includes three identical liquid helium (LHe) plants, with a total average cooling capacity equivalent to 75 kW at 4.5 K.The LHe plants provide the 4.5 K power magnets and cryopumps. They are designed operate in parallel handle heavy load variations.In this proceedingwe will describe presentstatusof emphasis on i) project schedule, ii) plantscharacteristics/layout iii) basic principles control strategies for stable operation of parallel.
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The cryogenic system for the KSTAR superconducting magnets has been commissioned. It consists of a cold box, distribution boxes (DB) and transfer lines. box DB #1 provide 600 g/s supercritical helium to cool (SC) magnets, their SC bus-lines, magnet support structures. also provides 17.5 liquid current leads supplies flow thermal shields. main duties #2 are relative among cooling channels each...
One of the main challenges ITER cryogenic system is to manage large pulsed heat load variation generated by superconducting magnet during fusion experiments. A solution proposed smooth such pulses and verified numerical simulations use structure (ST) as a thermal buffer taking advantage its mass about 5,000 tons consequent inertia. In order validate simulated predictions, tests have been executed on existing facilities. this paper we will present results feasibility performed at KSTAR. The...
Abstract Thermally reactive ally‐terminated sulfonated oligosulfone was easily synthesized and made it possible to fabricate crosslinked membrane with high ionic group contents for direct methanol fuel cells. The network structures of rigid rod polyarylene sulfone showed suppression swelling sulfonation degree 70%, which gave excellent properties cell applications. proposed membranes unprecedented reduction in cross‐over (less than 3% Nafion 112) conductivity (∼80% 112).
The dynamic simulation of a sub-scale ITER Central Solenoid (CS)/STRucture (STR) cooling loop has been performed to investigate the cryogenic control strategies against pulsating heat loads. HELIOS facility modified for this particular study, which consists Liquid Helium (LHe) reservoir with two immersed exchangers, circulation pump and an approximately 130 m long piping three evenly distributed heated sections. setup provides equivalent thermo-hydraulic configuration CS/STR, cooled by...
The ITER project design foresees Supercritical Helium (SHe) forced flow cooling for the main cryogenic components, namely, superconducting (SC) magnets and cryopumps (CP). Therefore, cold circulators have been selected to provide required SHe mass rate cope with specific operating conditions technical requirements. Considering availability impacts of such machines, it has decided perform evaluation tests at prior series production in order minimize risks. A proposal conceptualized, evaluated...
Since the first design of KSTAR helium refrigeration system (HRS) in year 2000, many modifications and changes have been applied due to both optimization improved knowledge cold components. The present specification HRS had fixed on March, 2005. Consequent manufacturing main equipment, such as “Compressor Station” (C/S), “Cold Box” (C/B), “Distribution Box ♯1” (D/B ♯1) was completed by or under supervision Air Liquide DTA end 2006. major components C/S are 2 low high pressure compressor...
The "first plasma" (100 kA of controllable plasma current for 100 ms) KSTAR has been successfully generated in July 2008. major outstanding feature compared to most other Tokamaks is that all the magnet coils are superconducting (SC), which enables higher values a longer time duration when nominal operation status reached. However, establish operating condition SC coils, cold components, such as thermal shields, coil‐supporting structures, buslines, and leads also must be maintained at...
Supercritical helium cold circulators operating at unprecedented high mass flow rates are required to maintain the ITER magnet and cryopump system conditions. The qualification test plan has been developed for two installed in Test Auxiliary Cold Box compliance with Japan Atomic Energy Agency cryogenic facility consisting of a cryoplant ∼ 5 kW 4.5 K. process modelling modes such as cool-down/warm-up, nominal 10% higher speed operation, including approach, assumptions made, expected results...
The pressure head necessary for the forced convection of supercritical helium (SHe) across ITER superconducting (SC) magnet system is generated by centrifugal-compressor type cold circulators. From viewpoint cryogenic system, simulation results indicate that main challenge Central Solenoid (CS) operation peaking SHe circulator induced during rapid ramping electrical current on coils. Excess variation in will push point rotating machine beyond surge line compressor map which can trip and...
Abstract Co-simulation of Cryoplant and Tokamak superconducting magnet system (referred to as Magnet) has been performed characterize operating condition associated with control strategies. model, developed by EcosimPro ® , consists three identical refrigerators connected integrated Termination Cold Box (CTCB) which distributes the coolant five Auxiliary Boxes (ACB) for Magnet CryoPump (CP) cooling. Meanwhile, Visual Modeler Toroidal Field (TF) coil, Central Solenoid (CS), TF STructure (ST)...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> To achieve the first plasma of Korea superconducting tokamak advanced research (KSTAR), KSTAR coils were tested in advance. As they should operate excessively low temperature 4.5 K and high magnetic field environment 7.5 T, it is crucial to monitor cryogenic structural behaviors device during commissioning period including a cool-down. The temperatures toroidal (TF) coil poloidal (PF) measured...
The system of ITER Cryodistribution (CD) and Cryolines (CLs) is an integral interface between the Cryoplant systems superconducting (SC) magnets as well Cryopumps (CPs). project has progressed from conceptual stage to industrial stage. subsystems are at various stages design defined by project, namely, preliminary design, final formal reviews. Significant progresses have been made in prototypes studies validations, such CL cold circulators. While one prototype already tested, other...