euratom mechanical operation on the tpl sector e.delmas – december 8th 2006 1/13 disassembly and...
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Mechanical operation on the TPL sector E.Delmas – December 8th 2006 1/13
Euratom
Disassembly and reassembly of a
sector of the Toroidal Pumped
Limiter
Technical procedure
Difficulties during operation
Task schedule
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 plate’s pipes
30° sector
Mechanical connection with
plate
Mechanical connection with column support
Technical procedureGeneral concept and interfaces of the TPL
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 3/13
EuratomTechnical procedureOpening of the torus for extraction
FCI antenna removal necessary in order to take out
the sector
ICRH Port
TPL Sector
Torus
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 4/13
Euratom
ICRH Port
Upper circular rail and lifting gear for TPL sectors handling
Rail for extraction from the vacuum chamber
Technical procedureLifting and Handling tools
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 5/13
Euratom
Torustesting hall
Technical procedureTransfer and radiation control
Sector transferred to a temporary storage zone
Radiation control of the components
Safety authorization granted to work on the part
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 6/13
Euratom
Torus Testing hall
Transfer and initiation of the work
Sector transferred to the workshop area
Technical procedure
Workshop
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 7/13
EuratomTechnical procedureHandling tools
Placing the sector on the handling tools
Physical studies can now begin
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 8/13
Euratom
Welded connections for cooling
Mechanical connections of fingers with TPL’s structure
Technical procedureFinger disassembly
Removal of water cooling pipes and connectors
Assembling the new fingers (verified)
Euratom
Maximum allowed leak rate is :
• 5.10-10 Pa.m3.s-1 at 20°C
• 5.10-9 Pa.m3.s-1 at 200°C.
0
50
100
150
200
250
1 2 3 4 5 6 7 8 9 10 11 12 13 14
days
cooling circuit up to 40 bars
cooling circuit up to 60 bars
tem perature °C
Technical procedureLeaktightness 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)
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 10/13
EuratomTechnical procedure
Reversed operation for
the disassembly
Sector insertion
Re-installation
Reassembling of the ICRH antenna
Reassembly
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 11/13
EuratomDifficulties
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
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 12/13
EuratomScheduleFitting 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
Mechanical operation on the TPL sector E.Delmas – December 8th 2006 13/13
EuratomScheduleTask Schedule
2 weeks of plasma
Radiation control
PhysicalMeasurements
Disassemblyof fingers
Assemblyof spare fingers
Qualificationtest
6 weeks