1 / 22

Update of c ryogenic activities

September 13 th , 2013 LS1 Committee (LSC). Update of c ryogenic activities. L. Tavian TE-CRG. Content. Update on: QRL compensator bellows DFBA gimbal bellows M ajor overhauling Various consolidations. The faulty equipment (QRL Line C). Internal ply damage (S45, 14R4).

dustin-flowers
Télécharger la présentation

Update of c ryogenic activities

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. September 13th, 2013 LS1 Committee (LSC) Update of cryogenic activities L. Tavian TE-CRG

  2. Content • Update on: • QRL compensator bellows • DFBA gimbal bellows • Major overhauling • Various consolidations

  3. The faulty equipment (QRL Line C) Internal ply damage (S45, 14R4) External ply damage (S78, 10R7) Witzenmann DN100 multi-ply bellows compensators (4 plies of 0.3 mm)

  4. QRL Line C compensator x-rays status

  5. Repair plan for QRL compensators Welding of the first compensator started in S81!

  6. Line E and F compensator: FE model C. Garion

  7. Conclusion of FE model C. Garion

  8. The faulty equipment (DFBA) Calorstat DN120 multi-ply gimbal bellows (2 plies of 0.2 mm) DFBAK shuffling module: Internal ply collapsing

  9. DFBA gimbal bellows status for all DFBAs Endoscopic inspection through line M interconnects Thanks to MSC for early opening of M sleeves ! Statistics (total 32 bellows all inspected): 3/32 (9.3 %)

  10. Pictures of the damaged bellows: DFBAF &DFBAI DFBAF lowergimbal DFBAF lowergimbal DFBAI lowergimbal DFBAI lowergimbal

  11. In situ accessby cutting the end door: possible solution Gimbal patching (Rigid assembly) Questions/issues: Very limited space to cut/weld the door Cutting and welding of beam pipes to be done in very difficult position Leak tests of beam pipes? Extreme very difficult work positions Safety to be assessed Thanks for EN-MME contribution!

  12. Repair options *: without 6 kA splice work uncertainty **: spare delivery time (13-14 week)

  13. Repair strategy • 0/ Validate the patching scenario • Done for the DFBAK (upper gimbal)  acceptable force of +/- 500 N for +/- 4 mm of displacement • Still to be done (in the coming days) for DFBAF & DFBAI (lower gimbal) • 1/ Start with one lower gimbal in-situ repair (DFBAF or DFBAI)  “easier” case • 2/ Validate the disconnection & reconnection of 6kA splices • 3/ depending of 1/ and 2/ experience return, decide on DFBAK repair (in-situ or in workshop)

  14. Major overhauling Compressors Motors

  15. LS 1 Major overhaul of LHC compressors Done : 26 % In progress : 42% To be done : 32 %

  16. Major overhauling Scratches on rotors Scratches on sleeve bearings Corrective maintenance within expectation! Scratches on slide valve Recovery of new equipment!

  17. On site maintenance

  18. DFBX current lead controls Flowmeter rack andPiping in UL14 (IP1 L)

  19. Leak on refrigerator cold boxes Cold box P8 : leak on LN2 circuit on the precooler HX Cold box P6 : leak on LP circuit on SS/ALU transition (DN400) Cold box P2 : leak on MP circuit on HX collector Repairs foreseen by end of 2013 !

  20. Conclusion • QRL compensator bellows: • X-ray is progressing well (~4 sectors done)  Statistics are presently encouraging (1 additional damaged bellows found) • Repair of the first compensator (S81) has started. • If statistics remains low, the repair is compatible with the present sector pressure test schedule. • What about Line E/F compensators? X-rays on a sub-sector (~8 compensators) are OK but FE simulation shows a potential risk. • DFBA gimbal bellows: • Endoscopic inspection completed  3 damaged bellows. • In-situ repair via patching could be envisaged for DFBAF and DFBAI (displacement forces to be measured in the coming days) • In-situ repair of the DFBAK is not validated (technical and safety issues). Workshop repair required a risk assessment of the splice disconnection/reconnection operation. • Resource and schedule still to be consolidated. • Major overhauling of compressors and motors is on track. Ramp-up of the on-site maintenance must be carefully followed. • DFBX current lead controls consolidation and cold-box leak repair are progressing well

More Related