The final major component of the International Thermonuclear Experimental Reactor's (ITER) core, the vacuum vessel, has been fully assembled within the tokamak pit. This achievement concludes a complex, multi-year process involving the fabrication and installation of nine massive sectors, a task led by South Korea as part of its in-kind contribution to the international project. The vacuum vessel is a hermetically sealed, D-shaped stainless steel chamber that will contain the fusion plasma. Its completion and installation are fundamental prerequisites for the subsequent assembly of in-vessel components, such as the blanket and divertor, which directly face the high-temperature plasma. Source: Asia Business Daily

Each of the nine vacuum vessel sectors weighs approximately 440 tons, and their precise alignment is critical for the magnetic confinement of the plasma. The structure forms a double-walled container with a total internal volume of 1,400 cubic meters. The space between the inner and outer walls will be filled with cooling water and steel shielding to protect external components, particularly the superconducting magnets, from the intense heat and neutron flux generated by the D-T fusion reactions. The successful installation of these sectors represents a significant manufacturing and logistical accomplishment for the ITER program and its Korean partners. Source: Asia Business Daily

Each of the nine vacuum vessel sectors weighs approximately 440 tons, and their precise alignment is critical for the magnetic confinement of the plasma.

South Korea's contribution extends beyond the vacuum vessel itself, encompassing the development of key technologies and operational experience gained from its own superconducting tokamak, KSTAR (Korea Superconducting Tokamak Advanced Research). This domestic expertise has been instrumental in meeting the stringent manufacturing tolerances required for ITER components. The completion of the vacuum vessel assembly not only fulfills a major part of Korea's commitment to the project but also solidifies its position as a key player in the global fusion research community. This milestone is a direct application of advanced manufacturing techniques developed through national fusion programs. Source: Asia Business Daily

With the vacuum vessel structure now complete, the next phases of ITER assembly will focus on installing the components inside it. This includes the 440 blanket modules that will absorb the plasma's heat and protect the vessel, as well as the 54 divertor cassettes at the bottom of the chamber designed to exhaust waste heat and helium ash. The integration of these systems, along with the massive central solenoid and toroidal field coils that surround the vessel, will continue to be a primary focus. The project's timeline for first plasma remains under review, but the completion of this core hardware element removes a major variable from the critical path of the tokamak's construction. Source: Asia Business Daily