1. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 1/13 Disassembly and reassembly of a sector of the Toroidal Pumped Limiter Technical procedure Difficulties during operation Task schedule

2. Euratom Double ring assembly of twelve 30° sectors (5m diameter, 1.6m height) Upper ring actively cooled with water (3.5MPa, 120°C) Hydraulic connection (Helicoflex seals) Mechanical connection between sectors Welded connection for plates pipes Mechanical junctions with columns support 30° sector Mechanical connection with plate Mechanical connection with column support Technical procedure General concept and interfaces of the TPL

3. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 3/13 Technical procedure Opening of the torus for extraction FCI antenna removal necessary in order to take out the sector ICRH Port TPL Sector Torus

4. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 4/13 ICRH Port Upper circular rail and lifting gear for TPL sectors handling Rail for extraction from the vacuum chamber Technical procedure Lifting and Handling tools

5. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 5/13 Torus testing hall Technical procedure Transfer and radiation control Sector transferred to a temporary storage zone Radiation control of the components Safety authorization granted to work on the part

6. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 6/13 Torus Testing hall Transfer and initiation of the work Sector transferred to the workshop area Technical procedure Workshop

7. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 7/13 Technical procedure Handling tools Placing the sector on the handling tools Physical studies can now begin

8. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 8/13 Welded connections for cooling Mechanical connections of fingers with TPLs structure Technical procedure Finger disassembly Removal of water cooling pipes and connectors Assembling the new fingers (verified)

9. Euratom Maximum allowed leak rate is : 5.10 -10 Pa.m 3.s -1 at 20°C 5.10 -9 Pa.m 3.s -1 at 200°C. Technical procedure Leaktightness Test Carried out in a vacuum vessel Thermal cycling of the components (20 to 200°C) Cooling circuit is pressurized with helium (6MPa at 20°C and 4 MPA at 200°C)

10. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 10/13 Technical procedure Reversed operation for the disassembly Sector insertion Re-installation Reassembling of the ICRH antenna Reassembly

11. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 11/13 Difficulties Difficulties: –Limited working area –Fragile components nearby –Heavy and fragile components –Delay in case of difficulties –Tore Supra cannot restart without the sector Our advantages: –Well-known and perfected procedures –An experienced and competent personnel –Mastered intervention procedures on low level radioactive parts –Available tools –Experience gained from the operation in 2000 and 2002 Mastering a complex and delicate operation

12. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 12/13 Schedule Fitting this work into the operation of Tore Supra Need to remove an ICRH antenna (May 2007) Need to remove an antenna in order to take out the sector May 2007 is the best time to carry out the operation

13. Euratom Mechanical operation on the TPL sector E.Delmas – December 8th 2006 13/13 Schedule Task Schedule 2 weeks of plasma Radiation control Physical Measurements Disassembly of fingers Assembly of spare fingers Qualification test 6 weeks