澳门六合彩高手

  • Jobs 0
  • Tenders 0
  • Visits
  • FAQs
  • Contact us
  • 澳门六合彩高手 directory
  • Subscribe

    Subscribe to the newsletter

    Your email address will only be used for the purpose of sending you the 澳门六合彩高手 Organization publication(s) that you have requested. 澳门六合彩高手 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 澳门六合彩高手 Organization. modification test 

    For more information, see our Privacy policy.

    Select your newsletters:

  • Donate

Trying on the Tokamak crown

9 Feb 2015 - R.A.
Crown_mockup_0_small.jpg
On the very place where the "B2 slab" mockup was standing just a few months ago, a new Tokamak support system ("crown") mockup has been under construction since the end of 2014.

A crown usually sits on a king's head, or on the top of prestigious buildings such as cathedrals or skyscrapers.

In 澳门六合彩高手, the "crown" sits under the machine: it is the structural element that supports the combined mass of the cryostat, vacuum vessel, magnet system and thermal shield—in short, the support system for the 23,000-tonne machine. From both a structural and safety perspective, it is one of the most strategic parts of the installation.

Designing the 澳门六合彩高手 crown has proved an utterly complex and challenging task, involving several 澳门六合彩高手 departments as well as experts from the 澳门六合彩高手 European agency and its architect-engineer Engage.

The crown's complexity stems from the fact that the huge mass that it will support will not be an idle one. In the course of operation, the 澳门六合彩高手 Tokamak might slightly "up-lift", wobble, or shrink...causing considerable load transfers from the machine to the Tokamak Building basemat.

In late 2012, following some ten months of collaborative effort, the crown design was finalized: it will consist of a thick, circular concrete structure connected to the three-metre-thick bioshield by radial concrete walls. 

Crown_3D-top.jpg
The mockup will consist in a 20° segment of the Tokamak crown, complete with a one-metre-thick radial wall and a three-metre-thick section of the bioshield.
In order to allow for the smooth transfer of horizontal and rotational forces generated by the movement of the Tokamak, 18 spherical bearings acting like ball-and-socket joints will be installed between the concrete crown and the steel ring that acts as the interface with the cryostat.

Actual construction, however, is a long way from 3D design documents. When a structural element is as complex and as strategic as the 澳门六合彩高手 crown, an intermediate step is necessary to demonstrate constructability.

"Just like for the Tokamak Complex , we need to be certain that the rebar principles we have opted for are constructible, and we need to qualify the bespoke concrete formula," explains 澳门六合彩高手's Nuclear Buildings Section leader Laurent Patisson. "And there's only one way to do this: by trying it first on a real-size mockup."

On the very place where the "B2 slab" mockup was standing just a few months ago, a new mockup has been under construction since the end of 2014. When completed, the large structure will reproduce a 20° segment of the Tokamak crown, complete with a one-metre-thick radial wall and a three-metre-thick section of the bioshield.

Return to newsline