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Preparation Cool-Down Sector 78-RAT 24th Nov

PDF RAT_20061124.pdf:
https://twiki.cern.ch/twiki/pub/HCC/BlogEntryPoint8x2006x11x24x20x25/RAT_20061124.pdf

Comments:

AC non-conformity

21.11.06 Transport and installation of the heater system of the current leads for RR77 and UA83 (P.Chambouvet: about 2 weeks of work starting Mon 27 Nov)

21.11.06 Non-conformity on instrumentation cables (temperature sensors on current leads) (A.Suraci: 4 cables are in repair)

13.11.06 Non-conformity of the crates of cryo instrumentation (inrush current) (A.Suraci: ready next year)

13.11.06 Non-conformity of the AC cabling of the crates under the magnets. This concerns ACR, MEL, orbit corrector power converters & VAC.

DC cabling

23.11.06 Cable temporary positioning on the transport side of the tunnel (A.Vergara: next year)

22.11.06 Pre-connection of 120A cables in LSSR7

20.11.06 Galvanic insulation installation on all DFBs

13.11.06 Non-conformity of the DC cabling of the orbit corrector power converters

13.11.06 6 kA and 13 kA cables positioning at DFBAO, DFBMA and DFBMC

Assembly -

Vacuum -

Cryogenics

22.11.06 Cryo-valves remote control in CCC by AB/CO

22.11.06 Control of quench valve

20.11.06 DFB instrumentation cables to be connected (D.Bozzini: 80% done)

17.11.06 Instrumentation cable HV tests in LSS8L (A.Suraci: 4 cables to be tested)

DFB Commissioning

13.11.06 ElQA-TP4-A for all DFBs between 7 and 8 (D.Bozzini: ongoing according to schedule; next week will begin ElQA-TP4-B, i.e. HV tests)

17.11.06 Pumping of insulation vacuum for all DFBs between 7 and 8 (P.Chambouvet: DFBAN done)

Safety

General remark: written communication in advance to announce operations!!!

23.11.06 Wooden structure for UA access restriction (that will allow transport).

23.11.06 Preparation of a prototype insulating protection (derived from a plastic tube) of the monorail by J.C.Guillaume and approval by J.Etheridge.

23.11.06 Water leak on the tunnel concrete wall to be fixed (33L8).

23.11.06 Planning of consignations/deconsignations

16.11.06 Cool down safety procedure & access conditions

Preparation of powering test

22.11.06 Pretest of 60A converters in sector 78, location C16L8. (B.Bellesia: stopped due to LQA hardware problems; expected end by Tuesday 28 Nov)

22.11.06 Installation of flexible cables by CV (UA83)

16.11.06 Water circulating in UA83 for the Powering Procedure Test: filters need to be checked.

AOB

13.11.06 BPM connection in Q2, Q3, Q4, Q5, Q6, Q7

13.11.06 Quench protection continuity tests and cables assignment LLS7R (DFBMH, DFBAN) and LSS8L (DFBMC, DFBMA and DFBX)

-- Main.BlancaPereaSolano - 24 Nov 2006 - 20:29

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