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Advanced Remote Handling Solutions for High Radiation Environments in JET

This document details the capabilities and requirements of remote handling systems, specifically the two-arm manipulator utilized in JET. Due to high in-vessel radiation fields, a force-feedback "man-in-the-loop" system assists in performing a variety of in-vessel tasks such as heavy welding, inspections, and cleaning. Key operations include tile detritiation, photogrammetry, and diagnostic installations. The integration of Virtual Reality for preparatory work and sophisticated tooling methods, including bolting and torque operations, showcases the advanced techniques necessary for safe and efficient remote handling in demanding environments.

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Advanced Remote Handling Solutions for High Radiation Environments in JET

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  1. Boom (transporter) Two-arm manipulator Remote Handling at JET Required due to high in-vessel radiation field Force-feedback: “Man in Loop” system, used in JET for a wide variety of in-vessel tasks including heavy welding

  2. Handling - installation and removal Welding - eg 20mm MIG “plug” welds Photogrammetry - camera and targets Testing wiring Cleaning plasma diagnostic windows Tile detritiation by intense flash-lamp In-vessel inspections Plasma diagnostics calibration Vacuum cleaning Wire-brushing Thread tapping Filing Much preparatory work is done in Virtual Reality TAE Antenna Carrier assembly being moved by MASCOT Remote handling capability in JET

  3. Octant 5 Octant 1 MASCOT accessing Task Module ILW needs two Remote Handling booms acting in synergy

  4. Bolt Runners Torque Wrench W4 Tile Carrier Tool Top (W24) Tile Carrier Tool Standard Wide Tile Carrier Tool W5 Tile Carrier Tool Bottom (W1) Tile Carrier Tool Examples of poloidal limiter tile-carrier tooling The ILW tiles are on carriers but these require interface tooling

  5. Remote Handling divertor tile tooling: detailed example

  6. Large-scale remote handling - the ITER-Like Antenna

  7. Intricate remote handling - diagnostic cabling installation

  8. End

  9. JET In-vessel dose rate history (& projection from April 2007)

  10. Generic tools Remote Handling tooling Ring spanner Torque wrench Bolt runner Portable camera

  11. Trolley Main Boom Section Flanged Joint Vertical Traverse Section Slewing Ring Flange Task Module ILW requires second toroidal-access boom • Necessitates extension and rebuild of existing “Octant 1” boom

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