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The subassembly procedure and relevant tools for the complete 40^\circ sector assembly as a foundation of the ITER machine have been developed to meet technical and functional requirements for years. Based on the concept of subassembly procedure and tools provided by ITER Organization, detailed procedure and relevant purpose-built assembly tools are developed by Korea Domestic Agency. The tools described in this paper contain an upending tool, a lifting tool, a sector subassembly tool, and a radial beam and vacuum vessel supports with alignment units. To verify the 6-degree-of-freedom system for fine alignment of components in the sector subassembly tool, scale-down mock-up has been manufactured and tested. This paper presents the overall 40^\circ sector subassembly procedure, the fundamental specifications of the relevant assembly tools, and the current status of the mock-up developments. [ABSTRACT FROM PUBLISHER]

During the operation of the Korea Superconducting Tokamak Advanced Research (KSTAR), there exist various disturbances that cause the conductors to become unstable. The KSTAR Toroidal Magnet (TF) system was designed to secure the sufficient stability against them. The stability analysis showed that the energy margin of the TF Cable-In-Conduit (CIC) conductor was sufficiently high so that the expected disturbances could not cause the conductor to quench. During the 2nd KSTAR campaign in 2009, the cryogenic stability of the TF magnet system was analysed by energizing it up to 36 kA that is a bit higher than the designed current of 35.2 kA. The temperature increase measured at helium outlets was less than 0.1 K, which was well consistent with the analysis. Even in the reference plasma scenario, it was expected from the analysis that there still exists the sufficient temperature margin more than 4 K. The quench analysis was carried out to validate the design of the present TF CIC conductor from the magnet protection's point of view. In this paper, the cryogenic stability of the TF magnet system was estimated and the quench detection parameters were derived for protecting possible damages from quenches. [ABSTRACT FROM AUTHOR]

The ITER Superconducting Magnet Manufacturing Database, MMD, is not only a data archive, but also a common communication platform, on which contributors to magnet manufacturing collaborate and take coordinated actions. In-kind procurement is a feature of the ITER construction. The magnet system construction involves six Domestic Agencies (DAs) plus contractors in these DAs. The six DAs are EU, Japan, Russia, the USA, Korea and China. The magnet system consists of many components like TF coils and current feeders. The ITER Organization (IO) monitors and controls quality throughout the manufacturing process. This is fundamental because the IO takes responsibility for the ITER machine even though not all large components can be tested under nominal conditions before their acceptance. For many contributors though (who have different cultures, quality assurance systems and languages), quality monitoring and control (QA/QC) represent big challenges. [ABSTRACT FROM AUTHOR]

A 600 kJ HTS SMES system has been developed for power system stabilization as a national project in Korea. Successful operating tests of the 600 kJ were recently completed. In this paper, a 2.5 MJ class SMES with HTS magnets of single solenoid, multiple solenoid and modular toroid type were optimized using a recently developed multi-modal optimization technique named multi-grouped particle swarm optimization (MGPSO). The objective of the optimization was to minimize the total length of HTS superconductor wires satisfying some equality and inequality constraints. The stored energy and constraints were calculated using 3-D magnetic field analysis techniques and an automatic tetrahedral mesh generator. Optimized results were verified by 3D finite element method (FEM). [ABSTRACT FROM AUTHOR]