SMACC Twentieth report [20 min ] 14/03/2014

2. Jean-Philippe Tock (TE-MSC) On behalf of the SMACC project SMACC Twentieth report[20 min]14/03/2014

3. Activities since last LSC (28/02/2014) • Arc splices installation • By Activities • By sectors • SIT • DFBA • Dashboards • Specials • Update on overheated splices • End of project issue • Activities for the next 2 weeks • Conclusions

4. SMACC Main activities for the last 2 weeks From last LSC (28.02.2014) • Sector 56 : • Final leak test and reconnection of DFBAK • Sector 67 : • Complete interventions on NC, recloseinsulation vacuum • Sector 78 • Work on NC, • Reconnection of DFBAO-SHM • Sector 81 (Priority) • Progress on insulation vacuum leak test • Sector 12 • Complete last IC (#1) • Progress on closure of ICs • Sector 23 • Progress on the installation of electricalinsulation • Complete Q diodes consolidation • Complete M line rewelding (but NCs) • Sector 34 • Complete installation of electricalinsulation • Workon overheatedsplices • Start consolidation of Q diodes • Sector 45 • Complete resoldering of splices • Progress on installation of shunts DFBAK SHM reconnection on-going [Splices are resoldered], Only the last subesector remains to be leak tested  Interventions completed, ICs to be reclosed then final LT   > 98% reclosed, 12/14 vac subsectors leak tested  DFBAK SHM reconnection on-going [Splices are resoldered],  Leaks on K hoses repaired, > ½ is finally LT All shunts are installed   > 75% reclosed  >98 % done  Completed  > 95% rewelded  > 90% injected and controlled  1 out of 4 repaired, on-going  > 40% done  Resoldering completed  >95 % of the shunts are installed

5. SEQUENCE AND STATUS Completed Install DN200 Completed Completed Completed Open M sleeves Open ICs OK to open Completed Undo / Redo splices ElQC(new splices) Cancelled ElQC(old splices) Machine Cu ElQCafter Cu mach. Completed > 7.9 sectors > 7.9 sectors Consolidate Q diodes ≈ 6.5 sectors Weld M Leak test M Close IC Final LT Insulate splices ElQCafter shunt Install shunts ≈ 7.9 sectors ≈ 7.9 sectors ≈ 7 sectors ≈ 6 sectors > 4.5 sectors ≈ 3.5 sectors ≈ 5.5 sectors Non-conformities (Before P Test) Non-conformities (After P Test) Almost completed in 1st sector (67) 1 completed ≈ 3.5 sec-eq

6. SMACC Progress report by activity • Resoldering: Completed for the whole LHC • Some desoldering/resoldering will be necessary because of NC Degradation after Cu machining, non-conformities,… • Competence and minimum capacity will be kept up to the end of the project Courtesy H Prin

7. SMACC Progress report by activity • Cu machiningcompleted in > 7.9 sectors-eq • Completed in 3 sectors • Only 11 remaining, mostly linked to overheated splices and DFBA SHM reconnection Courtesy MDumas

8. SMACC Progress report by activity • Shunts are installedin ≈ 7.9 sectors-eq • 2 weeks ahead of schedule • Saturation effect is seen • Completed in 3 sectors (67, 81, 12) • Only 16 ICs remains in the whole LHC (≈1%) Shunt weekly installation rate (4 weeks sliding average) *Estimate for W11 Courtesy H Prin

9. SMACC Progress report by activity • Insulation box: Installed in > 6.5 sectorsequivalent (4 weeks sliding average) *Estimate for W8 • On the baseline • > 3 weeks buffer wrt welding • Only 8 ICs left in 6 first sectors (<1 %) • but it was 12 ICs 2 weeks ago •  Issue with some tooling components (mixer), should be solved next week •  A fall back solution exists Courtesy H Prin / G Maury

10. SMACC Progress report by activity • Consolidation of Q Diodes: in ≈ 6.5 sectorsequivalent • Detailed schedule worked out • Should not interfere with welding activities • NC of un~/badly coated BB • Already decided to “use as is” if on magnet side • Decision extended to diode side [Diodes WG 26.02.2014] was confirmed at TETM 11.03.2014 Courtesy L Grand-Clement,

11. SMACC Progress report by activity • M Welding : Done in ≈ 6 sec-eq: • Routinely 60 ICs/week • Work concentrated in 1 sector, starting in 34 (7th/8) • No major disturbance • Exactly on the baseline presented on 4.10.2013 • Detailed presentation at next LSC 18 weeks @ 51 As presented LSC 4.10.2013 Slightly ahead of revised schedule 11 weeks @ 34 Courtesy S Atieh

12. SMACC Progress report by activity • M sleevesleaktesting : Completed in ≈ 5.5 sec-eq • Following the M lines rewelding, less regular by nature (sectorization) • ≈ 3 weeks behind schedule • Under recovery as for the M welding Courtesy P Cruikshank / L Mourier

13. SMACC Progress report by activity • Reclosure of interconnections : > 4.5 sec equivalent are reclosed • Workmainlyin S12 and starting in S23 • On the baseline • The 1000th IC will be closed this afternoon Courtesy A Chrul / A Musso

14. SMACC Progress report by activity • Final leak test: > 750 ICsvalidated, > 3.5 sec equivalent • 3 weeks to have results after repumping • S56: only DFBAK subsectorremains • S67: fullyvalidated but subsectors to berevalidatedafter interventions on NC • S78: 12 subsectorsvalidated • S81: 11 subsectorsvalidated, 3undertest, several interventions • S12: 6 subsectorsundertest • About 1 week behind schedule, was 3 weeks at last LSC 

15. SMACC Sector 67 • 2 leaksfixed, one not localised, accepted as is • On-going: • Reclosure and final leak test of insulationvacuum SMACC Sector 81 Remaining : Less than half of W leak test and DN200 (Back on baseline )

16. SMACC Progress report by sector • Main activities are : • Welding of M lines • Leak test of M lines • Start reclosure of Ics (Today) • Main activities are : • Leak test of M lines • Closure of interconnections • 6/14 subsectors are underfinal LT

17. SMACC Progress report by sector • Main activities are : • Work on overheated splices(More info in next slides) • Q diodes consolidation • Rewelding of M lines • Main activities are : • Installation of shunts • Installation of electricalinsulation

18. SMACC Dashboards • Shunting is slowing down (Difficult cases: overheatedsplices, DFBAs,… ) • The installation of insulation boxes is ahead of the baseline • Welding and M leak test rates are recovering the baseline schedule in parallel • Reclosure: On baseline, nominal rate achieved • Insulation vacuum leak test : RECOVERING • Disturbances of leak tests (M lines and insulation vacuum) have to beminimised

19.  Completed New New  Completed

20. SMACC Progress report SIT • SIT • Team isreduced but canberemobilisedveryquickly • Activitieslinked to NC, leaks and overheatedsplices Courtesy N Bourcey, S Le Naour

21. SMACC DFBA 95% of splices are consolidated OK for just in time (New schedule) Many operations are well advanced but not completed 8 DFBAs are completed Courtesy A Perin, E Vergara

22. SMACC Dashboards Baseline: 76.9 % (72.8 %) Completed: 74.9 % (69.0 %) Delay 10 (20) days Baseline: 82.7 % (77.4 %) Completed: 84.2 % (78.9 %) Delay -3 (-3) days • Ahead of schedule  Decreasing delay • Arc splices: Stable but difficult cases ahead • SITDelay decreases, waiting validation • DFBA: Many activities on-goingIn the shadow of the arcs  Recovering Baseline: 85.7 % (81.1 %) Completed: 67.1 % (57.4 %) Delay 3 (4) months

23. SMACC Dashboards Progress: Baseline: 82.5% (77.5 %) Completed: 82.1% (76.6 %) Delay2 (6) days Decreasing ; Δbaseline <≈ Δcompleted

24. SMACC Overheated splices From LSC of 07.02.2014 9 5 1 6 Confirmed as is Within the presentschedule, possible to repair 4 to 5 spliceswith new cables [Forecastismax 6] Courtesy C Scheuerlein, F Savary

25. End of project issue In order to alleviateeffect of the end of workatmosphere, presence in the tunnel isincreased: * One extra staff (Thx TE-VSC) to second worksitesupervisors * Auditors are reinforced and are intensifying audits Courtesy R Ostojic, M Struik

26. SMACC Summary on progress Main 13 kA Splices:  On schedule  Q Diodes consolidation : Almost all components are at CERN and tested  Overheatedsplices: to befollowed up closely  Leak test rate isaccording to forecast,  slightly more needed Special Interventions:  Delay is decreasinng  Almost all planned interventions are completed  Focus on NC DFBA:  Activities are back in the shadow of arc splices (except 56-78) SMACC:  About 2 days of delay, reducingwrt schedule defined one year ago !! Very slightly more than nominal rate achieved these last 24 weeks !

27. SMACC Main activities for the next 2 weeks • Sector 56 : • Final leak test and reconnection of DFBAK • Sector 67 : • Recloseinsulation vacuum and start final leak tests • Sector 78 • Work on NC • Reconnection of DFBAO-SHM • Sector 81 (Priority) • Complete insulation vacuum leak test • Sector 12 (Priority) • Reclose last ICs • Progress on insulation vacuum leak test • Sector 23 • Complete the installation of electricalinsulation • Complete M line rewelding (but NCs) • Progress on M-linesleaktesting • Start reclosure of ICs • Sector 34 • Workon overheatedsplices • Complete consolidation of Q diodes • Sector 45 • Progress on installation of shunts • Progress on electricalinsulation

28. Conclusions • Project isalmost back on schedule (-2 days) • Mind the last X % effect • Leaktestingisreaching the planned rates • DFBA consolidation isprogressingverywell • Overheatedsplices : On the criticalpath • S67 isalmostready for nextstep(ElQAbeforecooldownforeseen end of April) • S81 shouldbeready on time for pressure test (8.04.2014)

29. Advancement is > 80 % …. But