Best Practices for Remote Assembly and Maintenance · Best Practices for Remote Assembly and...
Transcript of Best Practices for Remote Assembly and Maintenance · Best Practices for Remote Assembly and...
Best Practices for Remote Assembly and Maintenance Keith Kershaw, Sources, Targets and Interactions Group Thanks to: Alessandro Tesini and Jim Palmer of ITER, Luca Dassa of EN-MME
Contents
• Why is it important to design for remote handling?
• CERN examples
• ITER Remote Handling Code of Practice
• Next steps
• Conclusions and discussion
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Why is it important to design
for remote handling ? Why use remote handling?
• Maximise running time
• Reduce exposure of personnel to hazards (radioactivity, Oxygen deficiency etc…)
Why design for remote handling?
• Manipulator arms cannot do everything a human can
• Ensure remote maintenance is POSSIBLE
• Speed up remote maintenance
• Hands-on work will also be faster
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CERN examples
CERN already has designed equipment to be compatible with remote handling. Examples include:
• LHC collimators
• SPS remote vacuum connection
Luca Dassa and Keith Kershaw are preparing short course for designers
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Example : LHC collimators
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LHC collimator remote exchange…
Remotely
operated crane
for handling and
transport Telemax for
inspection and
disconnection
TIM for
Inspection
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Example : SPS Remote Vacuum
connection (1978)
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The ITER Remote Handling
Code of Practice • Remote handling will be essential for ITER
maintenance.
• The ITER RHCoP is part of a management process to ensure “plant” is compatible with remote maintenance and to minimise downtime
• last year ITER issued CERN a Licence agreement to use the ITER RHCoP. It is not openly available.
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ITER – Fusion Tokamak
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After the first 7 years operation
remote handling will be vital for
maintenance Person for scale
ITER use JET
RH experience
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“Man in the loop”
Multi-purpose deployer with twin
force reflecting manipulators
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This is the “recovery” option
for times when purpose built
remote maintenance
equipment needs help
What is the ITER RHCoP?
There are two main documents:
• “ITER RHCoP” - (Technical guidelines)
• “ITER Remote Maintenance Management System” IRMMS - (Management processes)
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ITER Remote Handling (RH) Baseline Strategy
RH Design Standards for:
• Location Devices
• Fasteners (incl. tooling)
• Welded Joints (incl. tooling)
• Electrical Connectors
• Fluid Connectors
Key principles for:
• Specification & design of RH equipment
• Preparation & implementation of RH Operations
IRHCOP defines and describes
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IRHCoP Example – Location Devices
PIPE FLANGE
GUIDE SPIGOT
Parallel Dowel Pin Arrangement
Ball-End Dowel Arrangement Axial & Azimuthal Flange Location
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IRHCoP Example – Fasteners
RETRACTED POSITIONENGAGED POSITION
EXTENDED SPRING
COMPRESSED SPRING
BOLT INBOLT IN
BOLT UNDER-FLUSH
WITH COMPONENT
SUPPORT STRUCTURE
THR
EA
DED
CA
PTI
VA
TIO
N
THR
EA
D
CLE
AR
AN
CE
COMPONENT
BOLT UNDERCUT TO
ROOT DIAMETER
CAPTIVATION OVER BOLT
KEY ACCESS
HEAD GUIDED
RETRACTED POSITION
ENGAGED POSITION
EXTENDED SPRING
COMPRESSED SPRING
BOLT IN
BOLT IN
BOLT UNDER-FLUSH
WITH COMPONENT SUPPORT STRUCTURE
COMPONENT
“Pop-up” captive bolts
captivation captivation at thread
captivation over the head
Tooling
Simple bolt runner
High torque tool with dove-tail feature
for local torque reaction
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Includes:
• Organization of ITER RH Team
• Approach to RH classification
• Design & procurement process for RH equipment
• Method to ensure RH compatibility of ITER machine
• Organization and management of RH operations
ITER Remote Maintenance
Management System (IRMMS)
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IRMMS - RH Classification (define at
start of design phase)
• RH Class1: Will need RH replacement / maintenance. Mock ups as part of design process
• RH Class 2: Only unscheduled maintenance. May involve mock ups for design process
• RH Class 3: failure probability < 1 in 200 years. Design for RH repair. RH equipment procured after assembly
• Non RH Classified: do not require remote maintenance.
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IRMMS – Management (life cycle)
• Preparation and operations from concept to decommissioning
• Three key teams must work together through all stages of design and operation:
• ITER Plant
• ITER Remote Handling Equipment
• ITER Remote Handling Operations
• Reviews and iterations as part of process
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More than 40 points
ITER remote
handling design
compatibility
checklist
Next steps
• We will start with short basic remote handling compatibility training courses for designers (EN MME and EN-STI)
• For the future we will need to develop our own code of practice and processes.
• This work will need to be based on realistic predictions of the capabilities of our remote handling equipment.
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Conclusions & Discussion 1 • Where appropriate, beam line equipment
should be designed to be compatible with remote handling
• ITER RHCoP and IRMMS provide guidelines: • management aspects (collaboration of teams)
• design aspects
• Even if hands-on solutions are used, the same principles can offer benefits of reduced downtime and radiation exposure
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Conclusions & Discussion 2
For every object: • Analyse - from the beginning - the installation, failure
and maintenance scenarios
• Analyse the big picture – do not rely on a magic remote handling device
Luca Dassa and Keith Kershaw are preparing a short course for designers on design for remote handling compatibility – please contact us with examples or input.
Thank you. Questions and discussion welcome…
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