Subscribe options

Select your newsletters:


Please enter your email address:

@

News & Media

Latest ITER Newsline

  • ITER DNA | A "case" study...

    In December last year, and again this year in early May, pre-welding fitting tests demonstrated that steel components as tall as a four-storey building (and wei [...]

    Read more

  • First plasma| Temporary in-vessel protection

    The vacuum vessel, the operating theatre of the ITER machine, needs to be protected against possible damage from the hot plasma at any given time during its ope [...]

    Read more

  • Divertor cassettes | Successful prototypes open way to series

    Before embarking on the fabrication of the 54 complex steel structures that will form a ring at the bottom of the ITER machine—the divertor cassettes—the Europe [...]

    Read more

  • Images of the week | Titan tool 90 percent complete

    Towering 22 metres above ground and weighing approximately 800 tonnes, the twin sector sub-assembly tools (SSAT) are formidable handling machines that will be u [...]

    Read more

  • Video | How does the ITER cryoplant work?

    Cold is essential to ITER—10,000 tonnes of superconducting magnets, the thermal shield that surrounds the machine, the cryopumps that achieve the high vacuum in [...]

    Read more

Of Interest

See archived articles

Korea awards contract for ITER thermal shields

Ji-min Song, ITER Korea

The ITER thermal shield will be installed between the magnets and the vacuum vessel/cryostat in order to shield the magnets from radiation. (Click to view larger version...)
The ITER thermal shield will be installed between the magnets and the vacuum vessel/cryostat in order to shield the magnets from radiation.
The Korean Domestic Agency signed a contract with SFA Engineering Corp. for ITER thermal shields on 28 February. The contract covers the detailed design of manifolds/instrumentation, the manufacturing design and the fabrication of the thermal shield system. "For us, this is a big step forward for the Korean contribution to ITER," said Myeun Kwon, president of the National Fusion Research Institute, after the signing.

SFA is a leading company in industrial automation with much experience in the procurement of advanced equipment related to fusion, accelerator, and space technology. SFA was deeply involved in the manufacturing and assembly of the Korean tokamak KSTAR.

The ITER thermal shield will be installed between the magnets and the vacuum vessel/cryostat in order to shield the magnets from radiation. The thermal shield consists of stainless steel panels with a low emissivity surface (<0.05) that are actively cooled by helium gas, which flows inside the cooling tube welded on the panel surface. The temperature of helium gas is between 80 K and 100 K during plasma operation. The total surface area of the thermal shield is approximately 4000 m² and its assembled body (25 m tall) weighs about 900 tonnes.

Young Hwan Kang, Won-Sub Kim, Frank Jeon, SFA CEO Young Min Kim, NFRI President Myeun Kwon, KO-DA DDG Hyeon Gon Lee, Hee-Jae Ahn, Chang Young Oh, and Wooho Chung were present during the signature. (Click to view larger version...)
Young Hwan Kang, Won-Sub Kim, Frank Jeon, SFA CEO Young Min Kim, NFRI President Myeun Kwon, KO-DA DDG Hyeon Gon Lee, Hee-Jae Ahn, Chang Young Oh, and Wooho Chung were present during the signature.
The key challenges for thermal shield manufacturing are tight tolerances, precision welding, and the silver coating of the large structure. The thermal shield also has many interfaces with other tokamak components. "The Korean Domestic Agency is satisfied with this contract because the thermal shield is one of the most critical procurement items in the ITER Project. We will do our best in collaboration with the ITER Organization to successfully procure the ITER thermal shield," said Hyeon Gon Lee, DDG of the Korean Domestic Agency, on the occasion of the contract signature.


return to the latest published articles