lmc 08 april 2009 consolidations related to pressure protection on dfbs and dsls
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A. Perin TE-CRG, 06 April 2009 1
LMC 08 April 2009
Consolidations related to pressure protection on
DFBs and DSLs
A. Perin, TE-CRG
A. Perin TE-CRG, 06 April 2009 2
Pressure relief devices to be installed on DFBs and DSLs
Equipment Protection Remarks #
DFBM (1) 1 DN100 + 1 DN200 (link) All DFBMs but DFBMD/H 19
DFBM (2) 1 DN100 + 1 DN100 (link) DFBMD / DFBMH 4
DFBL 1 DN200 5
DFBA HCM 4 DN230 32
DFBA LCM 1 DN200 (+ 1 DN200 on link when powering Q6) 12-15
DSL (P1, P5) / Covered by DFBL and SAM/Semi-SAM /
DSLC (P3) 3 DN 200 3
L. Tavian
A. Perin TE-CRG, 06 April 2009 3
Pressure relief for the DFBM / DFBA LCM links
• 1 x DN 200 valve on interconnection sleeve
• relief of DFBM box: 1 x DN100 valve
• special cases: DFBMH & DFBMD, DFBAD, DFBAC/O
Interface to Quadrupole
Busbar interconnection
1 x DN200
1 x DN100
A. Perin TE-CRG, 06 April 2009 4
Pressure relief device DFBM / DFBA LCM link
Hydraulic plug Pipe diam 54 mm
Link with spacer
Spacers
Spacers
Pipe int diameter 213 mmCross section of BB duct: 23 cm2
Cross section of link with spacers: approx. 80 cm2
MCI: 4.5 K, DP = 1.3 bar, Mass flow (MCI): 10 kg/s @ 4.5 K
1 x DN200
Busbar interconnection
A. Perin TE-CRG, 06 April 2009 5
Pressure relief for the DFBM / DFBA LCM links: "standard" and special cases
"standard" DFBM link (19) DFBMD/H link (4)
DFBAC/O/D links (3+3)
A. Perin TE-CRG, 06 April 2009 6
Practical implementation
Reuse existing flanges / springs• DN 200 : same as the ones installed on the dipoles• DN 100 : same as used on the rest of LHC (ISO K + springs)
Installation on the link• rectangular cut in the interconnecion sleeve • saddle "patch" with DN200 port welded onto the interconnection sleeve. Validated on prototype.
Helium discharge direction• for DN100 on DFBM CL module: horizontal discharge will need a deflector. Installation of elbow is impractical and would require demounting of the service chimney.• for DN200: two possibilities (see next slide): short duct with deflector
Relief valve installed on link of DFBMM.5L6
A. Perin TE-CRG, 06 April 2009 7
Pressure relief for the DFBM / DFBA LCM "standard" links
DN200 valve
DN100 valve
DN200 valve
DN100 valve
Short duct + deflector Long duct
Deflector for DN100 valve Deflector for
DN100 valve
Deflector for DN200 valve
Short duct + deflector Long duct
+ - Reduced risk of interference with other equipment / survey- applicable with small variants to all DFBMs- better access during welding- no mechanical risk to the link
- No need of deflector on DN200- More defined flow during discharge- Only one item. Cannot be demounted.
- - Needs an additional deflector (but can be done later)- flow of helium less controled- deflector can be demounted
- possible interference with other equipment. Needs to be checked for each DFBM. Possible variants. (time !!!)- not applicable for DFBMD & DFBMH- reduced access during welding- momentum on link if bad handling
Preferred solution
A. Perin TE-CRG, 06 April 2009 8
Pressure relief devices for a DFBA
1 x DN100 High current module (HCM)
SHM-HCMInterconnectionShuffling module (SHM)
Low current module (LCM)
HCM - LCMInterconnection
4 x DN230
1 x DN200
Prototype valve under test
A. Perin TE-CRG, 06 April 2009 9
Deflectors in front of the relief valves
• Objective: avoid jet of cold helium below approx. 1.5m from ground
75 mm
400 mm
1500 mm
200 mm
With deflector
A. Perin TE-CRG, 06 April 2009 10
Work distribution: work on the vacuum tanks for equipment at atm. pressure
Equipmentatm. pressure
Protection Responsible of production / installation # in 2009
DFBM + DFBA LCM link DN100 + DN200 / DN 100 (link)
TE-CRG: tunnel operationsTE-VSC: springs for DN100EN-MME: supply of componentsTE-MSC: DN200 valves
23 (DFBM)6 (DFBA LCM)
DFBL 1 x DN200 TE-CRG: tunnel operations + logisticsTE-VSC: springs for DN200EN-MME: workshop operation + componentsTE-MSC: DN200 valves
5
DFBA HCM 4 x DN230 TE-CRG: tunnel operationsEN-MME: workshop machining + supply of all components
32 (8 DFBA)
DFBA LCM 1 x DN200 on chimney TE-CRG: tunnel operationsTE-VSC: springs for DN200TE-CRG: tunnel operations + logisticsEN-MME (to be confirmed)
6
DSL (P1, P5) magnet Covered by DFBL and SAM/Semi-SAM /
DSLC (P3) 3 x DN 200 TE-CRG: tunnel operation EN-MME: possible supply of components
3
A. Perin TE-CRG, 06 April 2009 11
Work distribution: work on deflectors and supports
Equipment at atm. pressure
Protection measures Responsible of production / installation
# in 2009
DFBA HCM Deflector for DN230 EN-MME 8
DFBA LCM Deflector on DN200 TE-CRG 6
DFBL Deflector for DN200 EN-MME 5
DFBM Deflector for DN200Deflector on DN100
TE-CRG 29
Equipment under vacuum
Protection measures Responsible of production / installation
# in 2009
DFBA HCM Reinforcement of supports
EN-MME 8
DFBA HCM Deflector for Chimney? EN-MME 8
DFBA LCM Deflector for DN100 TE-CRG 6
A. Perin TE-CRG, 06 April 2009 12
Estimation of durations for work on cryostats
Equipment Protection Estimated duration / DFB or DSL # in 2009
DFBM + DFBA LCM link DN100 + DN200 / DN 100 (link)
0.5 day tunnel operation (confirmed)+ production of components
23 (DFBM)6 (DFBA LCM)
DFBL 1 x DN200 6 days - demounting : 1 day- machining (workshop): 1 day- remounting: 1 day- logistics: 3 days
5
DFBA HCM 4 x DN230 7 days - demounting : 1 day- machining (workshop): 2 days- remounting: 1 day- logistics: 3 days
32 (8 DFBA)
DFBA LCM 1 x DN200 on chimney 2 days- machining (workshop): 1 day- demounting / remounting: 1 day
6
DSL (P1, P5) magnet n.a. /
DSLC (P3) 3 x DN 200 10 days 3
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