HC review, A. Perin, 12-MAY-2005 1 DFB Project DFB Project LHC hardware commissioning review 11-13 May 2005 Hardware commissioning of the DFBs and DSLs and connection cryostats A. Perin, AT-ACR on behalf of R. van Weelderen, V. Benda AT/ACR, S. Marque, AT-CRI and of the DFB, DSL and connection cryostats project teams Acknowledgements : C. Davison, V. Fontanive, T. Goiffon, S. Koczorowski, R. Marie, L. Metral, AT-ACR R. Folch, M. Genet, Ph. Trilhe, TS-MME D. Bozzini, AT-MEL
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HC review, A. Perin, 12-MAY-2005 1 DFB Project LHC hardware commissioning review 11-13 May 2005 Hardware commissioning of the DFBs and DSLs and connection.
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HC review, A. Perin, 12-MAY-2005 1
DFB ProjectDFB Project
LHC hardware commissioning review
11-13 May 2005
Hardware commissioning of the DFBs and DSLs
and connection cryostats
A. Perin, AT-ACR
on behalf of R. van Weelderen, V. Benda AT/ACR, S. Marque, AT-CRI
and of the DFB, DSL and connection cryostats project teams
Acknowledgements: C. Davison, V. Fontanive, T. Goiffon, S. Koczorowski, R. Marie, L. Metral, AT-ACRR. Folch, M. Genet, Ph. Trilhe, TS-MMED. Bozzini, AT-MEL
HC review, A. Perin, 12-MAY-2005 2
DFB ProjectDFB ProjectOutline Main characteristics of the DFBs & DSLs
From workshop to operation
Commissioning the DFBs
Commissioning the DSLs
Commissioning of the connection cryostats
Conclusions
Scope for DFB and DSL commissioning
DFB & DSL are powering LHC magnets, therefore the commissioning of the LHC circuits will
involve their operation.
This presentation focuses on aspects specific to DFBs and DSLs that are not covered during
the commissioning of the cryogenic instrumentation and the superconducting circuits.
Electricalfeed box Standard cell pair Return module
Electricalfeed box
Cryogenics– Current leads operation in 4.5 K saturated LHe bath– Controls: liquid helium and helium gas flow for the current leads– Max. pressure for DFBs current lead modules 0.35 MPa– DFBA supply/exit of GHe for E line
Electrical– Concentration of all types of busbars in very small space– Significant quantity of electrical interconnects: 1200 current leads to busbars, 1800 busbar to busbar,
ranging from 120A to 13’000A Insulation vacuum
– No vacuum barrier: DFB share the vacuum of the magnets they power Beam vacuum (DFBAs only)
– Actively cooled beam pipes with beam screens– Cold-warm transitions
HC review, A. Perin, 12-MAY-2005 8
DFB ProjectDFB Project
Installation of the DFBs: the dates
Sector IR Code N chim.
Inst.
Date Sector IR Code N chim.
Inst.
Date
7-8 60 Sep 05 5-6 69 Jun 067R DFBAN 13 Jan 06 5R DFBAJ 21 Jun 068L DFBAO 34 Nov 05 6L DFBAK 29 Jun 068L DFBMA 7 Sep 05 5R DFBLE 13 Jun 068L DFBMC 5 Sep 05 6L DFBMM 3 Jun 067R DFBMH 1 Jan 06 6L DFBMM 3 Jun 06
8-1 80 Jan 06 6-7 49 Jul 061L DFBAA 21 Jan 06 6R DFBAL 29 Jul 068R DFBAP 31 Jan 06 7L DFBAM 13 Jul 061L DFBLA 13 Jan 06 6R DFBMM 3 Jul 068R DFBMB 7 Jan 06 6R DFBMM 3 Jul 068R DFBMI 5 Jan 06 7L DFBMH 1 Jul 068R DFBMJ 3 Jan 06 1-2 80 Sep 06
4-5 77 Mar 06 1R DFBAB 21 Sep 064R DFBAH 32 Mar 06 2L DFBAC 34 Sep 065L DFBAI 21 Mar 06 1R DFBLB 13 Sep 065L DFBLD 13 Mar 06 2L DFBMA 7 Sep 064R DFBMG 3 Mar 06 2L DFBMC 5 Sep 064R DFBMK 3 Mar 06 2-3 60 Nov 064R DFBML 5 Mar 06 2R DFBAD 34 Nov 06
–DFBs will be installed during the interconnection period of the corresponding sector– on average 1 sector / 6 weeks (2 DFBA and 3 to 5 DFBM/L)
HC review, A. Perin, 12-MAY-2005 9
DFB ProjectDFB Project
DFBs from workshop to operation
Global strategy– Test as much as possible before installation in order to limit tunnel time– 31 variants: no spare unit
Ancillary equipment – The DFBs will be produced and validated as complete systems including, all instrumentation, proximity
piping and warm control valves, electrical splitting boxes etc.– As far as possible the units will be transported with all accessories installed
Testing– Extensive warm testing will be performed on all DFBs: vacuum, electrical, geometry, pre-alignment, etc.– Warm pressure/ mechanical/ electrical tests will be performed on complete units– All current leads will be cold tested and powered– No test in operational conditions will be performed before commissioning
Warm commissioning Cooldown Cold commissioning
– Specific commissioning for first DFBAs
Pro
du
ctio
n /
te
stin
gC
om
mis
sio
nin
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Installation– Specific tests, ELQA, interconnects etc.
Inst
alla
tion
HC review, A. Perin, 12-MAY-2005 10
DFB ProjectDFB Project
Equipment around the DFBs to be commissioned
DFBAO, IR 8L
HC review, A. Perin, 12-MAY-2005 11
DFB ProjectDFB Project
Equipment around the DFBs to be commissioned
CL control valve600A current lead
CL heaters transformers
CL instrumentation cabling
HC review, A. Perin, 12-MAY-2005 12
DFB ProjectDFB Project
Commissioning the DFBs: global picture
Required commissioning rate will be approx. 1 sector / 6 weeks with parallel commissioning of 2 DFBAs and 3 to 5 DFBMs/L
DFBs are tightly integrated with magnets and powering system: commissioning of the DFBs will be done mostly in parallel with ELQA and powering commissioning. (DFB and DSL must be operational to perform power tests!)
QRL
cryogenics
WRL
hel
ium
Control &supervision
DC powering & protection
MagnetsBeam pipes
forces
cryogenics
currentcryogenics
alignment
interfaces
interfaces
Supports
DFB
Cold tests in operating conditions will not performed on surface: DFBs will be operated the first time in the tunnel: specific testing will be needed for at least 1 DFB of each type
Commissioning starts when installation is finished, i.e.:– DFB is installed and aligned– all connections (busbar, vacuum, cryogenics, etc.) are closed and leak checked– Pressure test is successfully performed
HC review, A. Perin, 12-MAY-2005 13
DFB ProjectDFB Project
Commissioning the DFBs: warm
Goal: ensure that the the DFBs are ready to start the cooldown
– Testing of local equipment and instrumentation is performed as far as possible in the workshop before installation
operations– Insulation vacuum commissioning: performed in parallel with the corresponding
magnets– Operation of all control valves and instrumentation (see presentation 2 )– Electrical commissioning: continuity and High Voltage (see presentations 9 & 21) – Precise alignment of beam pipes after pumping and pressure tests– Beam vacuum commissioning: cold and warm sides ( see presentations 15 & 16)
HC review, A. Perin, 12-MAY-2005 14
DFB ProjectDFB Project
Commissioning the DFBs: cooldown
Cooldown– Specificities (with respect to arc components)
• Cooldown to 70K cannot be done in parallel with the magnets because of pressure in header D (1 MPa) is not compatible with DFB/current leads design pressure (0.35 MPa)
• Shuffling module cooldown will be the same as the corresponding arc• Sequence shall be defined in coordination with magnet cool down• Cool down time depending on DFB type and local conditions (varying from 2 to 5
days)• Commissioning of the DFBL should be performed in parallel with the
superconducting links
– Control of the alignment of beam pipes after cooldown
HC review, A. Perin, 12-MAY-2005 15
DFB ProjectDFB Project
Type cold commissioning of DFBs
GOALS: – check the functionalities– determine the operational parameters and behavior of each type of DFB– determine the behavior in most probable non nominal cases
Applies to: 1 (at least) DFB for each type DFBA, DFBM, DFBL
Operational parameters: estimated time: min. 3 weeks (possibly in parallel with some other commissioning operations)
• Determine cool down/warm up time and parameters• Determination of PID parameters for all operating conditions • LHe level maximum and minimum• LHe level stability, particularly in case of unbalanced powering• Operational parameters in transient condition
Non nominal operating conditions and interlocks: estimated time: min. 1 week (will required dedicated commissioning time)
• Failure of CL heater & recovery• Loss of liquid level• Loss of cooling gas for CL
Optional: parameters confirming the technical choices: estimated time: possibly in the shadow of the other commissioning operations
• Temperature measurement (shield etc.)• Temperature measurement of GHe leaving CL (icing & condensation – HV test problem)• Stop CL heating and restart with ice on it • Deformation of the beam pipes in case of quench
HC review, A. Perin, 12-MAY-2005 16
DFB ProjectDFB Project
Default cold commissioning of DFBs
Goals:– Apply the operating parameters from type tests– check the proper operation of the equipment and tuning if needed– prepare for normal operation
Commissioning operations will be integrated and dependent on ELQA and powering commissioning operations
Most specific commissioning operations can be performed in parallel with other systems commissioning
Parallel operation of 2 DFBAs and 3 to 5 DFBM/L
Operations Commissioning of instrumentation and control loops (see presentation 2 ) Control of stability of LHe levels and temperatures Electrical commissioning: ELQA (see presentations 9 & 21) Commissioning of DC power system (see presentation 8) Commissioning of beam vacuum (see presentation 15 & 16) Validation of operational parameters during power tests and other transient conditions
HC review, A. Perin, 12-MAY-2005 17
DFB ProjectDFB Project
DSLs: the superconducting links
HC review, A. Perin, 12-MAY-2005 18
DFB ProjectDFB Project
Main characteristics of the DSLs: functionalities
Electrical– Connection of the DFBL to standalone magnets (DSLA, B, D,E), approx. 76m– Connection of the DFBL to the DFBA (DSLC), approx. 517m
Cryogenic (only for DSLC) : Supply of cryogenics to DFBLC, very limited instrumentation, no active components Specificities: long cryogenic lines, in particular at pt3 : very long reaction times (3 to 30 hours)
– No particular tests, except for pressure and leak testing and HV tests during and after in-situ installation.
Type-2 DSLs (517m)– Pressure and leak testing and HV tests during and after in-situ installation – Type test by a ~30m long validation model:
• mechanical and LN2 to give production go-ahead to firm (fall 2005)• Optional: Cryogenic+ electrical (summer 2006).
– N.B. DSLC installation of critical cable part 09.07.2006 – 25.08.2006
Warm commissioning Essentially ELQA in parallel with corresponding DFB commissioning Insulation vacuum commissioning in parallel with corresponding DFBs
Cooldown Can be performed in parallel with corresponding DFBs and magnets
Cold commissioning: type testing for DSLA and DSLC ELQA Cryogenics: system characterized by very long reaction time No cold test on real size DSL on surface: 1 extended commissioning for each type:
– Necessary to perform tests to determine the operational parameters– Reaction time in transient conditions, optimization of operating temperature and
flows– Recovery after non-nominal conditions (loss of coolant, re-cooling parameters)– Will require at least 3 weeks of dedicated cold operation (necessitates cold
General 16 LE in DS of LHC Ensure continuity of cold machine
Characteristics Similar hydraulic characteristics as magnets
(pressure drop, free cross section,…) Beam pipes and busbar lines are cooled by adjacent
magnets and by central shuffling module Specially placed thermometer at warmest point to
follow subcooling to 1.9K
Cryogenic test Performed on magnet test bench in SM18 Specially instrumented (40 thermometers) LE Goal: determine the cooldown rates and general
behavior at cold and in transient conditions Electrical insulation
Example: IR 1 leftMechanical Layouts
TT821
l L1 L2
Tmax
1.90 K 1.90 K S1 S2
Central Shuffling Module
Line M
ξ Heat Exchanger
Sketch of a cold bore cooling sleeve (in operation with beam). (document LHC-LE-ES-0002 rev. 1.0)
Illustrations courtesy S. Marque, AT-CRI
HC review, A. Perin, 12-MAY-2005 21
DFB ProjectDFB Project
Commissioning the connection cryostats (LE)
Commissioning Cooldown
– Same time as DS cooldown– Tracking of temperatures and pressures in particular, pressure drop and temperature evolution
Subcooling to 1.9K– Tracking of temperature and comparison with test measurements and numerical estimations– Tracking of adjacent magnet temperatures
HC review, A. Perin, 12-MAY-2005 22
DFB ProjectDFB Project
Conclusions
In order to reduce the commissioning time in the LHC tunnel, all ancillary equipment will be installed on the DFBs and tested before tunnel installation
As no operational cold test can be performed on surface, specific time (approx. 3 weeks) will be needed for the first DFB commissioning
As an integral part of the LHC arcs and of the powering systems, the DFBs will be involved in most commissioning operations. The specific commissioning operations dedicated to series DFB should require a limited dedicated time, most operations can be performed in parallel with other commissioning operations.
The DSLs will require dedicated specific time (approx. 2 weeks) to determine the operational parameters and optimize the control loops.
For the connection cryostats, the commissioning will consist essentially of a careful tracking of the parameters of the LE and of the adjacent magnets