Enable Recite

Subscribe options

Select your newsletters:

Please enter your email address:

@

Your email address will only be used for the purpose of sending you the ITER Organization publication(s) that you have requested. ITER Organization will not transfer your email address or other personal data to any other party or use it for commercial purposes.

If you change your mind, you can easily unsubscribe by clicking the unsubscribe option at the bottom of an email you've received from ITER Organization.

For more information, see our Privacy policy.

News & Media

Latest ITER Newsline

  • Neutral Beam Test Facility | Lessons learned from SPIDER, a full-size negative ion source

    SPIDER finished its first test campaign in late November 2021 and is now entering an upgrade phase. During this time, the testbed will be shut down for about on [...]

    Read more

  • Manufacturing | Korea completes a third vacuum vessel sector

    A third 40-degree sector of the ITER vacuum vessel has exited the Hyundai Heavy Industries production line in Ulsan, Korea. Sectors representing one-third of th [...]

    Read more

  • On-site coil manufacturing | Two more to go!

    In the European winding facility on site, two large poloidal field coils have already left the manufacturing line. Two others are currently advancing through th [...]

    Read more

  • Manufacturing | Completion of the first vacuum vessel gravity support

    The factory acceptance test on the first ITER vacuum vessel gravity support has been successfully completed at Haneul Engineering in Gunsan, Korea. Under the 8, [...]

    Read more

  • Technology | Hail showers in ASDEX Upgrade for ITER disruption mitigation

    Just before the 2021 Christmas holiday break, the team at the ASDEX Upgrade tokamak successfully fired frozen deuterium pellet fragments into a plasma as part o [...]

    Read more

Of Interest

See archived entries

Korean contract advances neutral beam ports

The vacuum vessel's neutral beam ports are composed of a connecting duct, port extension, and port stub extension. The Korean contract signed in July covers the in-wall shielding that will be assembled inside the port's double shell. (Click to view larger version...)
The vacuum vessel's neutral beam ports are composed of a connecting duct, port extension, and port stub extension. The Korean contract signed in July covers the in-wall shielding that will be assembled inside the port's double shell.
The Korean Domestic Agency signed an important contract in July for the fabrication of neutral beam port in-wall shielding with Korean supplier Hyundai Heavy Industries Co., LTD (HHI). Through this contract, installation of the in-wall shielding into the port stub extensions will begin in mid-2015 with fabrication completed by early 2016. Hyundai Heavy Industries is also manufacturing two sectors of ITER vacuum vessel as contractor to the Korean Domestic Agency, as well as seventeen equatorial ports and the nine lower ports

The vacuum vessel's neutral beam ports are composed of a connecting duct, port extension, and port stub extension. The spaces between the inner and outer shells of the port extension and port stub extension are filled with preassembled blocks called in-wall shielding. The main purpose of in-wall shielding is to provide neutron shielding for the superconducting magnets, the thermal shield and the cryostat.

In order to provide effective neutron shielding capability with the cooling water, 40-millimetre-thick flat plates (steel type 304B4) are used in almost all areas of the volume between port shells.

In-wall shielding is composed of shield plates, upper/lower brackets and bolt/nut/washers. Pre-assembled 368 in-wall shielding blocks will be assembled into the neutral beam port extension and port stub extension during port fabrication, while 160 field joint in-wall shielding blocks will be assembled after field joint welding on the ITER site. The total net weight of all neutral beam in-wall shielding approximates 100 tonnes.

Ki-jung Jung, Director-General of the Korean Domestic Agency, commented during the signature: "ITER Korea takes very seriously the demands of the vacuum vessel schedule and quality requirements by ITER."


return to the latest published articles