echemi logo
  • Product
  • Supplier
  • Inquiry
    Home > Active Ingredient News > Diagnostic Test > Case Study International Thermonuclear Experimental Reactor (ITER) with PolyWork

    Case Study International Thermonuclear Experimental Reactor (ITER) with PolyWork

    • Last Update: 2022-12-30
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit



    ITER is one of
    the most ambitious energy projects ever.
    In southern France, 35 countries are collaborating to build the world's largest tokamak magnetic fusion device, aiming to prove the viability of nuclear fusion as a large-scale carbon-free energy source on the same
    principle that powers our sun and stars.





    01 Challenge



    The assembly of the ITER reactor is underway
    Tokamak components from hundreds of plants on three continents are assembled
    on site at this international project.
    The ITER organization is responsible for integrating and assembling the components
    delivered to the site by the seven project members.
    However, assembling these elements is not just a game of interlocking components: these elements are not only complex and numerous, but also have extremely tight tolerances, even within



    02 Solution



    Digitally-based analysis is required to ensure that the components fit together
    Data collection by measurement experts is an important preparatory step
    Their goal is to provide reverse engineering experts with precise data
    after measuring each component to verify its compliance.
    In both phases – measurement and reverse engineering – PolyWorks software
    is used.

    The cryostat scans as a whole and plots the deviation from the nominal part

    "Before I joined the ITER program, I used PolyWorks | on a large project Inspector™
    。 I want to continue using this software, which allows us to acquire large point clouds directly in the software," says
    Lionel Poncet, an engineer in the ITER measurement group.
    "When it comes to analyzing a large number of points, there are a limited
    number of points that other software on the market can analyze.
    We chose PolyWorks | Inspector, which meets the need for fast analysis of data with a large number of points," adds Hani Gagueche, a CAD draftsman in charge of reverse engineering



    03 Advantages


    In May 2020, a cryostat base
    was installed in the tokamak assembly pit.
    The ITER team and its partner team spent ten years designing, building, delivering, assembling and finally welding the base
    of this cryostat.
    The cryostat base is about 6 meters high and 30 meters in diameter, and the weight that needs to be moved and positioned is 1250 tons, and the integration requires measurement and three-dimensional reconstruction to adjust the device

    The cryostat is positioned
    before being placed in the tokamak base pit for final assembly.

    "When measuring, we can use PolyWorks | directly Inspector and laser scanning equipment
    After scanning the object, we get a very accurate and very high-quality point cloud and a triangulated model, thanks to the tools used during the acquisition process," explains
    Lionel Poncet.
    "Once we receive the data, we analyze it using the reports we have that identify critical assembly areas, and consider the built components and the surrounding components of known dimensions to ensure that they work
    well together.
    For the base of the cryostat, we quickly realized that we needed to | with PolyWorks Inspector to identify very critical areas and needed a tool to move the component to the closest millimeter area
    about 30 cm or more.
    We have developed several tools
    PolyWorks| Inspector allows us to choose the most appropriate tool," added
    Hani Gagueche.
    Lionel Poncet further clarified that in this case, PolyWorks made it possible for us to optimize the installation sequence to less
    than 12 hours.

    While the installation of a cryostat base is not simple, more complex challenges await measurement and reverse engineering experts: the upcoming components will indeed be smaller, but now the area is crowded and tolerances will be tighter
    At the same time, the deadline for performing the operation is approaching!


    04Complex operation


    "This summer, installing the first sector segment of the vacuum chamber of a tokamak device on a pre-installed tool was tricky," confirms
    Hani Gagueche.
    Magnets, thermal shields and vacuum chamber sector segments must be assembled
    at the most critical locations with a gap of only 20 mm.
    To provide integrated sensors, we had to use PolyWorks' renderings to reposition these elements relative to each other.

    Lionel Poncet explains, "The prestressed ring was also fully scanned
    We created a model, integrated into CAD software, to predict future assembly packages
    The corrective coil was also scanned
    with PolyWorks.
    On the obtained model, the spacer must be designed to match the future interface
    We also need to characterize and measure some pipes to ensure that they do not collide
    with components that will come in the future.
    What's more, this allows us to know the interface for future welding and cutting operations"

    Assemble a cryostat base
    in the tokamak base pit.
    PolyWorks| A color map in the Inspector highlighting potential collisions
    when last placed in the tokamak pit.


    In addition to in-house teams, contractors also use PolyWorks
    when acquiring point clouds.
    “PolyWorks| Inspector is a universal module dedicated to measurement, allowing multi-device connectivity
    It has standard or advanced software packages that collect data and post-process
    dense point clouds with real-time "quality" indications.
    For example, in addition to the measurement aspect, the software can also obtain clearance plots," says
    Thibaut Hehlen, Sales Manager at PolyWorks Europa.
    The company is a subsidiary of InnovMetric, publisher of PolyWorks
    "The PolyWorks software is a great experience, it has a comprehensive range of features to quickly solve the problems
    you encountered!" Hani Gagueche commented

    To obtain some 3D reconstructions for critical cases, reverse engineering experts use PolyWorks | Modeler™, a modeling and reverse engineering solution
    "This module allows us to reconstruct surfaces from very accurate meshes and provide CAD files that everyone can access, even if the user doesn't have PolyWorks or a powerful computer
    Hani Gagueche explains: "CATIA users (there are many such users in the ITER program) can therefore access the documents
    we make.

    PolyWorks| The new automatic area calculation algorithm in Modeler will soon be tested
    by the ITER team.
    This algorithm can greatly save time on reconstruction!


    05Featured products


    This article is an English version of an article which is originally in the Chinese language on and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to with relevant evidence.