Paul Cruikshank on behalf of TEVSC colleagues amp AL4030 Consortium S133 1 Paul Cruikshank TEVSC VSC SMACC Status Report LSC ID: 437830
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Slide1
VSC SMACC Status Report
Paul Cruikshank on behalf of TE-VSC colleagues & AL4030 Consortium (S133)
1
Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014
W
bellows leaks
i
nternal
leaks
k
flexibles
leaks
i
nsulation
vacuum leaks
- LEAKS teamSlide2
VSC SMACC Status Report- ContentsSMACC DashboardsVSC Insulation Vacuum StatusM leak testW leak testVSC Cold Vacuum OverviewSIT & DFBAPumping pipesk flexibles
Known leaks & QRLLeak overviewSummary
2
Paul Cruikshank
TE/VSC - VSC SMACC Status Report -
LSC, 11/04/2014Slide3
LS1 arc splices dashboard - simplified Status table for Splice train3Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014Slide4
LHC Insulation Vacuum Status - 11/04/20144Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014Slide5
M Leak Test> 1400 M welds leak testedLeak testing rate follows M weld delivery rate13 leaks identified in 6.5 sectorsMME analysis of each case – reported LSC by Said
Several needs are often combined –
eg
QRL validations with SMACC works - Evacuation and backfilling of line C or line D headers for QRL repair validation,- Evacuation and backfilling of cold mass volumes in case of SMACC NC repairs (M line, diode,
etc),-
Evacuation and backfilling of cold mass volumes for M lines series tests- Evacuation
and backfilling for specific circuits related to special intervention repairs (eg line k, Q5L8, DFBAK, DFBAO, SSS replaced in S3-4, etc.).- Local actuation of service module valves if remote actuation is not possible.- (0.5 x design pressure) configuration following the pressure test.- Pressurization/evacuation of headers during post PT leak localization and repair.
Without this help leak testing would be slower – VSC acknowledges the support & flexibility of CRG team
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Paul Cruikshank
TE/VSC - VSC SMACC Status Report -
LSC, 11/04/2014
Cryo
AssistanceSlide6
W Leak Test1001 W bellows leak tested.A few issues with W tightnessO-rings out of placeO-ring flatteningO-ring cleanliness
Excellent reactivity/pro-activity of W coordination to resolve problems.Many W reopenings required:
W leaks, internal leak search, diode repairs, magnet alignment,
Other ventings – DN200, vac inst
, BPM, flap valve, etc
So far, 74% of pumped volumes needed venting and re-pumping
6
Paul Cruikshank
TE/VSC - VSC SMACC Status Report -
LSC, 11/04/2014
Flattening of
o-ring
observed in a few interconnects,
make statistics and use spare
o-ringSlide7
LHC Cold Vacuum - Activities Overview Status table for overall activities7
Many VSC activities in parallel‘M leak tests’ & ‘W leak test’ progressing well.Strategy to treat some NC until after PTest
eg W leaks, internal leaks…..
Other VSC consolidation activities in shadow. Paul Cruikshank
TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014
2 air leaks at foot cradles to solveSlide8
SIT Leak Test SupportSignificant leak test support effort, > 730 leak tests so farLarge flexibility to deal with planning – mainly NC follow-up nowVery good collaboration with MSC teams 8
Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014
Test type
QuantitySlide9
DFBA Leak Test SupportDFBA activities coming to an endMain activities to do : DFBAO, DFBAK….Helium leak to IV near to DFBAK in subsector A8L6 ?? 9
Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014
DFBAO
SHM-HCM
c
lamshell
test Slide10
BV Pumping Pipe Damage10
Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014
5-6
6-7
7-8
8-1
1-2
2-3
3-4
4-5
Damage
0
0
4
3
6
2
9
0
Consolidated or changed
-
-
4
3
4
2
5
-
Status of non-conformities, courtesy
C.Garion
Typical damages on pumping hoses
Consolidation with a reinforcement sleeve Slide11
k Flexible IssuesRecall:Braid damage – > use-as-is, proceed to W closure and perform global leak test at 1 bar heliumShocks, compression, – > exchange preventatively before W closureWhere are we:k & M2N flexibles
procured52 NC opened before W closure – of which 29 exchanged – of which 2 leaking (18 of 29 tested)Additionally, 7 have been found leaking after W closure – not part of 52 NC (on 4.5 sectors)
ICIT support – detailed inspection and NC opening
EN/MME support - analysis by Alexandre Gerardin.
11
Paul Cruikshank
TE/VSC - VSC SMACC Status Report -
LSC, 11/04/2014Slide12
Insulation Vacuum Leaks pre-SMACC12Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014
‘Known’ and ‘LS1 start’ helium leaks eliminated, except…..
Triplet 5L – use-as-is
23R8.M – 2 leaks already eliminated in subsector – signal still present – on-goingDFBAK – awaiting re-closure to measure.
Hugh work by VSC, MSC, CRG, MME, MEF teams.Slide13
Helium leak elimination & status13Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014
1 E-7 mbarl/s
Cryosorption
pumpingContinuous turbo pumping
Additional turbo pumping
Cannot be pumped
1 E-5
mbarl
/s
1 E-2
mbarl
/s
1 E-4
mbarl
/s
Helium Leak
rate
i
n subsector
(Cold
,
RT)
5
QRL leaks
1
cryomagnet
leak( S34)
1
QRL leak
17
cryomagnet
leaks
Triplet
5L – use-as-is
DFBAK – to do
(DFBA CL
flexibles
in 2009)
A8R6.M
QRL
ssH
7-8
Several others pre-LS1
Created
in
thermal
transients
1
QRL
leak (S45)
A23R8.M
– on-goingSlide14
SummaryVSC SMACC progress is close to baseline planningSIT & DFBA vac support is coming to the endLS1 leaks have to be dealt with in parallel to series workCollateral damage to k flexibles still persists
Collateral damage to pumping pipes solvedW leaks are understoodReactivity to NC remains good
Known and QRL leaks (almost) eliminated
Risk of helium leaks after P.Test or cooldown
cannot be excludedExcellent support from all – MSC, CRG, EN/MME & MEF, BE-OP….
The work goes on…………
14
Paul Cruikshank
TE/VSC - VSC SMACC Status Report -
LSC, 11/04/2014Slide15
Other issues - back-up slides15Paul Cruikshank TE/VSC - VSC SMACC Status Report - LSC, 11/04/2014Slide16
Phase 1 – Air to IV leaks0-ring16
MB vessel
a
t central foot
x 3
F
oot flange
o-ring
Connector
feedthrough
Jumper
weld/material
Q7L2
Q29R2
Q21L3
Q21R3
Q33R7
Status for LHC arcs
S5-6
S4-5
S6-7
S7-8
S1-2
S8-1
S3-4
S2-3
Air
leaks (identified to component)
4
5
4
4
8
5
3
6
Paul Cruikshank
TE/VSC - VSC SMACC Status Report -
LSC, 11/04/2014Slide17
LT Phase 1 – internal leak types 17
M weld or collar (x3)
M2N flexible (x3)
K collector (x4)
QBBI.8L7, QQBI.22L7, QBBI.B34L7, QBBI.B21R6
K flexible (x3)
QBBI.B26L3, QBQI.9R2, QBEI.11R3
QQS current leads (x1)
QBQI.9L2 (Q8)
QQBI.13L6 (M3)
QQBI.7R5 (M2)
QBBI.A29L4(M3)
QBQI.18R5
QBQI.26R7
QBQI.33R3
Paul Cruikshank
TE/VSC - VSC SMACC Status Report -
LSC, 11/04/2014