TS3 Scheduled Interventions on InstrumentationQPSEE Equipment by MPEEE with Associated Resource Planning TLE K DahlerupPetersen TEMPEEE 12 September 2012 LHC Machine ID: 313170
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Slide1
TE/MPE/EE
TS#3
:
Scheduled
Interventions on Instrumentation/QPS/EE Equipment by MPE/EE
- with
Associated Resource Planning.TLE
K. Dahlerup-Petersen TE/MPE/EE 12 September 2012
LHC Machine
Task Title Short Description Location Scheduled Time for InterventionResourcesTest RequirementsNeed for circuit condem.Arc Chamber replacement- pilot installation in two LHC sectorsReplacement by a 1kV version of the existing 200V arc chambers for the 4.5 kA extraction switches of the RQF / RQD circuits. S23 & S34(UA27 & UA43) 3 daysMonday p.m.to Thursday a.m.IHEP team of 4 specialists + M. Favre & KDPExtraction tests in both sectors @ inj, 2kA & Inom. Scheduled for Thursday evening (4 hours). Condemnation required.Checking & functional verification of 13 kA extraction switchesFollowing one recent case of spurious release of the RQF EE system in S12. UA231/2 day max Monday a.m.IHEP team (2 engineers)Verification during restart of the machine.Condemnation required.Udump measurement debuggingReplacement of the existing ‘Measurement’ boards of RB EE by upgraded version. Sector 34 and, if successful, rest of the machine. UA43 & UJ33Other 7 sectors 30 minMonday p.m.2 days Tuesday & Wednesday)B. PanevP. DubertAGH -teamRequires power testing up to Inom. Imperatively Monday evening so to upgrade all LHC before restart. No condemnation required.Q10,L2 instrumentation cabling upgrade Insertion of new patch to complete the cable upgrade. L2 (S12) 1 hourMonday p.m. M. FavreRamp test necessary.Scheduled for Thursday eveNo condemnation requiredDYPB: Cable length verificationEstablishing a list of cables to be replaced during LS1. To be performed in S12. Complement to similar list made in S23 in June 2012. 4 hoursFriday a.m.G. CoelinghAGH + IHEP teams, E. Nowak No tests. No circuit condemnation.Quench Heater DiagnosticsTDR (‘Reflecto-metry’) measurements on heater circuit YT121 of dipole A21L3 (NC942550). S23, cell 21.L3 4 hoursG. D’AngeloS. PembertonG. SewerynE. Nowak No powering of RB circuit required.
The below defined tasks have all been entered into IMPACT, have either already been accepted by the TS coordination (EN-MEF) or are in the process of being approved. Slide2
TE/MPE/EE
TS#3
:
Scheduled
Interventions on Instrumentation/QPS/EE Equipment by MPE/EE
- with
Associated Resource Planning.TLE
K. Dahlerup-Petersen TE/MPE/EE 12 September 2012
LHC Machine
Task Title Short Description Location Scheduled Time for InterventionResourcesTest RequirementsNeed for circuit condem.ELQA Diagnostics on RCO.A78.B2Further Investigations following impossibility to power above 55A due to quench (during PCS testing).S784 hoursTuesdayG. D’AngeloG. SewerynM. DominguezR. KulagaRequires new powering test on Thursday evening (CM in S78 needed).Replacement of temporary cableLead-to-proximity equipment cable on DFBXG.L8 will be exchanged by new, pre-manufactured cable.RQX.L81 hour Tuesday/WednS. Pemberton R. MompoR. KulagaG. SewerynTesting required to verify conformity of new cable.Thursday evening.No condemnation required.Replacement of instrumentation cable segment of RQ7.R4Lead-to-proximity equipment cable to be replaced. Located on DFBAH.R4. Tunnel R42 hoursTuesd/Wedn.G. SewerynS. PembertonG. D’AngeloTesting required to verify conformity of new cable.Thursday evening.No condemnation required.Preventive Maintenance of 600A EE switchgear.Functional testing of extraction breakers having shown abnormal behavior. Without circuit current. Point 2, 3, 4 and 83 days minimumG-J. CoelinghM. FavreB. PanevP. DubertIn case of switch replacement powering tests with opening time measurements are required.Thursday evening.No condemnation is required.