Upload
faith
View
46
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Session 2 - Shutdown 2012. Consolidations of Cryogenic Systems Review of the consolidation works scheduled for the cryogenic installations during a long shutdown. Olivier Pirotte on behalf of TE/CRG. OUTLINE. Non conformities (ECRs) / Repairs - PowerPoint PPT Presentation
Citation preview
Session 2 - Shutdown 2012
Consolidations of Cryogenic Systems
Review of the consolidation works scheduled for the cryogenic installations during a long
shutdown
Olivier Pirotte on behalf of TE/CRG
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
OUTLINE Non conformities (ECRs) / Repairs
DFBs safety valves : DFBA (S23/S78/S81), DFBM (Q6R2 & Q6L8) Air leak DFBAO & DFBMC abnormal thermal load Replacement of flexible in DFBA (leak prevention) IT safety valve DN300 collector (safety) He level gauge on Standalone Magnets (see JPh Tock’s
talk) Leaks in “Y”-lines (see JPh Tock’s talk) Instrumentation of the tunnel (Recommendation #12, TF Report) HRL sectorization (Recom. #13, TF Report) DFBA CLs : TT channels 1.9 kV
consolidation(EDMS 919146)
Quench lines
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
OUTLINE Consolidations & new proposals
Decoupling of adjacent cryogenic sectors(reminder of G. Ferlin’s presentation, Chamonix 2009)
Access platforms to the QRL Service Modules
QRL service module compressed air distribution
Insert of flowmeters on Beam Screen circuits
Upgrade of DFBX Current Leads control Addition of a pressure measurement on header B ATLAS consolidations DFBAO: improvement of LHe level control (idem DFBAC) QURC P6 : change CV241 valves (idem P4, reduce
downtime)
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
OUTLINE
Mandatory maintenance activities Major overhauling planning
Upgrade / new installation Additional refrigerator at P4 (cavities)
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
HRL sectorization
Motorization of the HRL sector valves
Cost : 100 kCHF Installation : 1w/sect. + cabling
Allow safe interventions in the tunnel and improve
cryogenic consignations
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
DFBA CLs : TT channels 1.9 kV consolidation
• Prevent destruction of TT on 13kA CLs (major downtime risk)
• Restore conformity with LHC specification (Tests @ 1.9 kV)
• Cancel 5 TeV limitation
Cost : material already supplied Duration : 2-3 w / DFBA (cards CRG, cables EN/EL, connectors MPE)
Change :•Connectors•Cables•DAQ Cards
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
QUENCH LINES CONSOLIDATION
• Restore the operation of quench lines (quench sector issue : He -> atm.)
• Avoid major downtime risk (use of He strategic storage)• Avoid extra cost risk : ~700 kCHF / sector
Point 5
Figures : • New integration solutions to be studied• Issue : sections with vacuum insulated TL ?• Cost estimate : ~500 kCHF• Installation : 10 weeks / Point• 2012->2013 ?: no consequence if E ~3.5/4 TeV
HOW : Restore the functionality of QLs
Test of QLs at P5
Many conflicts with neighbouring equipements during shrinkage
Destruction of the insulation / Liquid air on cable trays
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
OUTLINE Consolidations & new proposals
Decoupling of adjacent cryogenic sectors(reminder of G. Ferlin’s presentation, Chamonix 2009)
Access platforms to the QRL Service Modules
QRL service module compressed air distribution
Insert of flowmeters on Beam Screen circuits
Upgrade of DFBX Current Leads control Addition of a pressure measurement on header B ATLAS consolidations DFBAO: improvement of LHe level control (idem DFBAC) QURC P6 : change CV241 valves (idem P4, reduce
downtime)
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Decoupling of adjacent sectors
Allow exchanging a magnet or a QRL SM in a sector while
keeping the adjacent sector in nominal cryogenic operation
• Cost : 130 kCHF / sector (QUI)• Installation : 4-6 w / sector
Add a submarine
DN250 valve on header B
C
D
B
F
E
B
C
D
C
D
B
F
E
B
C
D
F E D C F E D C
QRL(5-6)
QURCB
QSRB QSRA - QURA
QURCA
QRL(6-7)
QUI
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Platforms for QRL Service Module
Allow safe intervention on instrumentation of a QRL SM (arc, SAM, DFBs)
Study with EN/MEF of a retractable platform to access a standard QRL
Service Module in the arcs
HOW : Install access platforms
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
QRL Service Module Access Issue – Arc
Maintenance activities +
interventions on cryogenic
systems required
access to instrumen-
tation
How to get and work on the instrumentation of the SM ?
Safety issue with
maintenance personnel
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
QRL Service Module Access Issue - DFBs
How to get and work on the DFBs ?
Unsafe access conditions : risks of injuries and collateral damage to neighbouring equipements
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Platforms for QRL Service Module
Allow safe intervention on instrumentation of a QRL SM (arc, SAM, DFBs)
Figures : • 310 QRL Service Modules• Standard config. : ~200 SM in the arcs• Non standard config. :
SAMs / DFBs (DFBX?) / RMs• Cost estimate : 850 kCHF• Installation : 4-6 weeks / sector• Shift from 2012 to 2013 : no consequence
HOW : Install access platformsStudy of a retractable platform to access a standard QRL Service Module in the arcs
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
He guard
QV
PV, CV
6 barAir
QRL SM - Compressed air distribution
Improve performance and life time of cryogenic control
valves
• Cost : 25 kCHF / sector (manpower)• Installation : 2-3 w / sector (ideally after access platforms installation)
Split air distribution : add a 2 bar collector for CV
in // of the 6 bar one2 bar
FT
Proposal following last operation issues:add flowmeters on BS circuits
Aim : measurement of BS heat load (e-clouds, ?) How : add Coriolis FT to measure mass flow in BS Proposal : 1 FT / 400 m (8/sector) Cost : 64 x (15 kCHF + 5kCHF for cabling) = 1.3
MCHF Issue : integration in the interconnectionsSession 2 - Shutdown 2012 - Consolidations of Cryogenic Systems -
O. Pirotte on behalf of TE/CRG
CEH
Support posts & 60 A CL
TT
C'm2, T2
m1, T1
D
QRL side
Magnet side
Aperture 1
Aperture 2
Ib
Ib
Basic cooling scheme of beam screens : ~ 53m
mt, Tt
TT
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
DFBX: 600 A and 120 A CL control upgrade & control of
heaters Improve performance and
reduce risk of downtime due to the operation of DFBXs
• Cost : 130’000 CHF / DFBX• Installation : 3 w / DFBX
• Replace 2008 consolidation by a more reactive and robust control strategy of 120A and 600A current leads (19 x flowmeters / DFBX)
• Consolidate temporary local control system of heaters on DFBXs installed in 2008
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
ATLAS consolidations
Cryogenics kCHF Compressors 1450 Cryocontrols 470 Small spares 50 He pumps 175 11kL return line 80 PCS pipe extension 70 7kL buffer 340 He dryers 360
Total ~ 3 MCHF Courtesy H. Ten Kate
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
OUTLINE
Mandatory Maintenance activities Major overhauling planning
Upgrade / new installation Additional refrigerator at P4 (cavities)
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Mandatory Maintenance activities Major overhauling planning
The full revision of the 74 compressors is the determining factor in the planning : up to 18 weeks for compressor station with 8 CPs (QSCA)
Cost :- CP major overhauling : 5.2 MCHF- Preventive maint. : 1.6 MCHF
All other preventive maintenance tasks can be carried out in the shadow of the revisions : up to 6 weeks / installation (C199 contract)
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
HL-LHC : new refrigerator at P4
Decouple the operation of the cavities from the
magnets (Sensitive control of the LP
cavities performance)
&Improve P4 cryogenic
margins to equivalent level as P6 & P8
• Cost : 300 kCHF• Duration : 6 weeks
Profit of LSD to install pipework in the shaft
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
In summary The list of consolidations and maintenance activities scheduled for the next
long SD has been presented. The total cost is about 12.15 MCHF.
The following consolidations should strongly be considered :
Consolidations involving safety issues for the personnel : HRL sectorization : 100 kCHF, 1 w / sector Access platforms to the QRL SMs : 850 kCHF, 6 w / sector
Consolidations needed for 14 TeV or to avoid major downtime risk : DFBA Current Leads TT channels 1.9 kV consolidation : 3 w / DFBA Quench lines : 500 kCHF, 10 w / sector Upgrade of the DFBX CLs control : 1 MCHF, 3 w / DFBX Mandatory maintenance activities (CP major revision) : 6.8 MCHF, 14 months (18
w / LHCA)
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Acknowledgements
All CRG colleagues (J. Casas, S. Claudet, G. Ferlin, A. Perin, G. Perinić, L. Tavian, …)
ATLAS team (H. Ten Kate)
Inputs from EN/MEF
Thanks for your attention
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
ADDITIONAL SLIDES
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Non Conformities – Remaining work from 2009
• DN230 SV on DFBA (S23/S78/S81)• DN160 SV on DFBM (Q6R2 & Q6L8)• Deflectors for safety of persons• Duration : 3 weeks / Point• 2012->2013 ? : no consequence if E ~3.5/4 TeV
IT DN300 SV collector : • Cost estimate : 25 kCHF / IT• Installation : 2-3 weeks / IT• 2012->2013 ? : no consequence.
Mitigation measures remain in force.
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Replace metallic flexible hose in DFBAs
Replace potentially damaged metallic
flexible hose in DFBAs.
Installation : 1 week / DFBA (12 remaining)
Replace the flexible hose with a suitably
dimensionned and shaped smaller diameter
pipe
Flexible hose LHCDFBA_0114
Line N in DFBAH HCM
CL line
Fixed pointapprox 3.2 m
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
DFBAO: improve LHe level control
To improve the liquid He level control
• Cost : 5 kCHF + 10 kCHF manpower• Duration : 2-3 weeks
Install additional level gauge in non perturbated chimney.Add a heater to evaporate the liquid that accumulates at a low point.
Pressure equilib / evap. to 6kA chimney exhaust(Ø8)
Level gauges
Capillary withinstrumentation wires
Connector
LHe connec-tion
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
DFB Burkert valves CV891 consolidation
120/600 A Consolidation strategy:• Use newly developed bearing-less
valves• 1000 valves for 600A & 120A valves
already delivered• 10 x 13 kA + 64 x 6 kA valves delivered.
Remaining March 2011• Installation during technical stops• 2010-2011 Xmas break : all DFBX + 600
A
6 / 13 kA
New Test Bench
D
C
B
F
D
C
B
F
D
C
B
F
E
D
C
B
F
E
D
C
B
F
D
C
B
F
E
D
C
B
F
D
C
B
F
E
B C D
LN2
Warm recovery line
4.5 Krefrigerator
Coldcompressor
system
Cryogenicinterconnection
box Lowestpoint
4.5 K standalonemagnet or cavities
Distributionfeed box Standard cell pair Mid sector Return module
to adjacentcryogenic system
Helium ring line
D
C
B
F
D
C
B
F
D
C
B
F
E
D
C
B
F
E
D
C
B
F
D
C
B
F
E
D
C
B
F
D
C
B
F
E
D C BFE C D
LN2
Warm recovery line
4.5 Krefrigerator
Coldcompressor
system
Cryogenicinterconnection
box Lowestpoint
4.5 K standalonemagnet or cavities
Distributionfeed box Standard cell pair Mid sector Return module
to adjacentcryogenic system
Helium ring line
D
C
B
F
D
C
B
F
D
C
B
F
E
D
C
B
F
E
D
C
B
F
D
C
B
F
E
D
C
B
F
D
C
B
F
E
D C BFE C D
LN2
Warm recovery line
4.5 Krefrigerator
Coldcompressor
system
Cryogenicinterconnection
box Lowestpoint
4.5 K standalonemagnet or cavities
Distributionfeed box Standard cell pair Mid sector Return module
to adjacentcryogenic system
Helium ring line
Addition of a pressure measurement on header B
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Aim : assess line B operation + redundancy How : add a PT on each Return Module Cost : = 100 kCHF (12 kCHF/sector) Issues : precision (0.2 mbar) & range (1
barg), He guard, radiation
PT
PT
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
TEST OF QUENCH LINES AT P5Destruction of the insulation
Many conflicts with neighbouring equipements during shrinkage
Liquid air on cable trays
Point 5
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
ATLAS MR COMPRESSOR STATION
Courtesy of J Metselaar & N Delruelle
New C6
C2 upgraded
Consolidated ATLAS MR compressor station
C1
C3
C4
C5
INTRODUCE REDUNDANCY AND ENERGY SAVING
Cost : 1.55 MCHFInstallation : 12-14 w
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
ATLAS – He : decouple solenoid-toroid
During Toroid Fast Dump recovery, also Solenoid is down since MR in use for cooling down the toroids, thus 4d-loss of detector time
Cure:
Install a new ~7kL He buffer dewar to continue solenoid operation during the 5 days of Fast Dump recovery of the toroid
Few options to be studied and engineered
Cost estimate : 350 kCHF Courtesy H. Ten Kate
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
ATLAS : prevent He pollution
Avoid risk of He pollution, clogging of filters and interruption of SR and MR refrigerator operation for 1-2 weeks/cleaning cycle
Cure:Install He water dryers in SH1 and cold He air dryers in
USA15, twin bed absorber units with auto switching and recovery
Session 2 - Shutdown 2012 - Consolidations of Cryogenic Systems - O. Pirotte on behalf of TE/CRG
Non Conformities – Remain from 2008
DFBs safety valves (material in stock) Installation : 3 weeks / point Shift from 2012 to 2013 : no consequence if E ~3.5/4
TeV Flexible in DFBA (material in stock)
Installation : 1 w / DFBA Shift from 2012 to 2013 : no consequence if E ~3.5/4
TeV IT safety valve DN300 collector
Design and integration to be done : 2 months (1 w / IT) Installation : 2 weeks / IT Cost estimate : 25 kCHF / IT Shift from 2012 to 2013 : no consequence. Mitigation
measures remain in force