Target #3 mechanical design - CERN
Transcript of Target #3 mechanical design - CERN
n_TOF target #3 Production readiness review – Final mechanical design
Marc Timmins EN/MME, Vincent Maire EN/MME29th of May 2019
M. Timmins & V. Maire n_TOF target #3 PRR 29-05-2019
Outline
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• Mechanical design overview
• Target core and anti-creep structure
• Target vessel and moderators
• Carrier frame
• Target piping work
• Instrumentation
• Design vs Safety requirements
• Conclusions
M. Timmins & V. Maire n_TOF target #3 PRR 29-05-2019
Target core and anti-creep structure
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Core
178kg
550kg
Total: 1440kg
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Target core and anti-creep structure
Restricted
area
Anti-creep structure
M. Timmins & V. Maire n_TOF target #3 PRR 29-05-2019
Anti creep plate
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IEDR 2018 PRR 2019
• More cooling efficient (direct
contact of N2 on Pb.
• Easier to produce (Only one part,
no extrusion, predicted less
deformation thanks to symmetric
design. See protoype in next talk
N2
flow
Target core and anti-creep structure
M. Timmins & V. Maire n_TOF target #3 PRR 29-05-2019
PbPbPbPb
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Target core and anti-creep structureAnti-creep structure
M. Timmins & V. Maire n_TOF target #3 PRR 29-05-2019
Target vessel and moderators
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Gap 2.5mm
M. Timmins & V. Maire n_TOF target #3 PRR 29-05-2019
H. Moderator with bi-metallic transition
V. Moderator without Bi-metallic transition
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Target vessel and moderators
Vertical moderator supportVessel
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Target vessel and moderatorsBimetallic transition
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Target vessel and moderatorsH. moderator
M. Timmins & V. Maire n_TOF target #3 PRR 29-05-2019
• Withstand 2.5barg (see Laurene’s talk)
• Limited deformations <1mm (see Laurene’s talk)
• Limited Al. seen by the beam (no more than current target)
• Limit number of welds to increase robustness (Insert machined from a bulk)
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Target vessel and moderatorsH. moderator – Inlet/outlet nozzle
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Target vessel and
moderators
Pb wedge
V moderator
Moderator
cup
gap
2.5mmWall thickness
4mm
Closing weld
(no pressure)
Pb 47kg
Lead wedge
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Carrier frame
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Lifting
hoist
Lifting
bar
Grip hooks
for lifting bar
Survey target
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Carrier frame
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Gap: 15 mm
Gap: 30 mm
Pool
Existing positioning pins
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Target piping
work
2.7
m
In Situ
welding
Disconnection
area
Flexible
pipes
Flexible
pipes
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Instrumentation
2x3 thermo-
couples
type K.
Probe
tips
Feedthrough
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Design vs Safety requirements
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N2 Vessel <= 0.5barg (out of scope)
Water in moderators = 2.5barg (CAT. SEP)
CAT. SEP (Sound Engineering
Practices)
However
Category 1 recommendations will be applied due to a highly radioactive environment,
with difficult access.
1. Design: All welded joints are checked against pressure vessel standards (See
Laurene’s talk)
2. Manufacturing: Material certificates, raw material inspection, weld book (certified
process + certified welders)
3. Inspection: 100% visual & PT, 100% x-ray wherever possible. (See Marc’s talk)
4. Leak & pressure tests (See Marc’s talk)
5. Full tractability record
Conclusions
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• Functional design completed.
• 80% of 2D drawings completed.
• Fine tuning production processes.
• Prototypes and tests completed or launched.
• Challenging manufacturing operations, but no
showstoppers.
M. Timmins & V. Maire n_TOF target #3 PRR 29-05-2019