Hardware Commissioning Day
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Europe/Zurich
AT Auditorium (CERN)
AT Auditorium
CERN
Roger Bailey,
Rüdiger Schmidt
Description
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Forum for discussion to improve strategies and safety of the 2009 superconducting circuits commissioning campaign
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Support
Participants
100
View full list
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Session 1: General Overview
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1
Scenario for commissioning of the powering system•Scenarios: commissioning to 450 GeV and 4…5 TeV, high currents only to 4TeV initially •How to decide to go to 5 TeV? •What about circuits with “small” current? 4 TeV- 5 TeV? •Key dates in preparation and outlook to planning •LHC operation during the winter 2009/10Speaker: Rüdiger Schmidt
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2
Consolidation and major changes that have impact on the powering circuits•Overview: what changed during the shut-down? Modification to the powering system? •Impact of sector 34 repair on ELQA, inductance tables, ….. •Parameters, ramp speed and acceleration •Update of installation of nQPS, UPS •Other modification: DN200, othersSpeaker: Reyes Alemany Fernandez
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3
Powering Test Overview•Organisation of hardware commissioning, meetings, … •What happens before powering tests after cooldown •Commissioning of Warm sectors, Cold sectors and sector 34: what needs to be done? What can be dropped? •When should we work: 2 shifts during 5 days versus 3 shifts during 7 days, MPP analysis, what can be done in a nightshift – WE? Bottlenecks in manpower •Rules for patrols during powering testsSpeaker: Boris Bellesia
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1
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Session 2: Safety and access
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4
First Outcomes of the Safety Task Force (the RULES)•Tunnel access during powering – what areas can be accessed during powering as a function of current / energy in the different circuits? Clear and transparent rules •Matrix between powering and access (where not to go when?) •Document to be providedSpeaker: Ralf Trant
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10:15
COFFEE break
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5
How to ensure safety during powering? (ENFORCING the RULES)•Powering phase I at low current: How to ensure that the current does not exceed the “safe” value? •Powering phase II: How can we be sure that nobody is in when we power? •Underground access during powering phase I and II for interventions: How to ensure that we do not power a circuit during such intervention (such as with the PIC)? •Underground access during commissioning of the powering system? Is it required? (EE switches, cut water, triplet…) •Hardware commissioning using the access system •Set the rules for access, different modes, transition from shutdown to commissioning/operationSpeaker: Matteo SOLFAROLI
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6
Safety issues related to commissioning and operation of the powering system•Changes in safety procedures (ADI, …)? •Recall consignation •Who does it? Gerard Pastor for commissioning? Interventions during night and weekend? •Setting hardware limits for the current of power converters during powering •Tests of UPS – working as expected?Speaker: Hugues Thiesen
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4
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Session 3a: Cryogenics, DFBs and current leads
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7
Cryo Performance & Operation•Cryogenic calorimetric measurements: view for 2009, automation? Can we increase the accuracy? •Operation overnight and over the weekend: any constraints? Presence of operators and experts in the CCC? •Consolidation: impact on re-commissioning and operation (DSLC, stand alone magnets, inner triplets, Y-lines, …)Speaker: Serge CLAUDET
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7
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Session 3b: Powering, Power Converters, QPS&EnergyExtraction
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8
ELQA•What is new? •What needs to be repeated? Warm sectors, cold sectors, sector 34? •ELQA for 5 TeV: problems to go to 1.9 kV? Better to reduce the tests to 1.6 kV? •Monitoring during cool-down, what circuits, what sectors in parallel? •HV tests in case of late symmetric Q-detector installation? To be discussed with QPS experts. •Planning ELQA: One sector at the time? Stand alone first, arc later?Speaker: Nuria Catalan Lasheras
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12:30
LUNCH break
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9
Exceptional conditions during powering tests – the rules•Can we force signals to provide CryoStart and CryoMaintain – when is it permitted? How to ensure that no equipment will be at risk? •Can we mask CryoStart and CryoMaintain? Under what conditions? How to ensure that no equipment will be at risk? •When to block / unblock circuits? •What are the rules? Notification, approval, who is authorised to do it, ….. •How to document such exceptional conditions?Speaker: Laurette Ponce
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11
How does it look altogether•When can we start? •How long will it take? •Before nQPS: early measurements of bad splices with Cryogenic calorimetric measurements in sector 23 and 45 – when and how? •How long from 4 TeV to 5 TeV? How many steps to be done? Impact on commissioning?Speaker: Antonio Vergara Fernandez
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8
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Session 4: Powering tests and procedures
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15:55
COFFEE break
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13
How to detect bad splices?•Bad splices in magnets and interconnects •What methods, what accuracy? •What is a “bad” splice? Repair is required if the resistance is larger than… for 450 GeV, 4 TeV and 5 TeV. To be defined before the start of tests •Procedures for other circuitsSpeaker: Mike Koratzinos (Unknown)
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Final Session
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15
Summary and discussionsSpeaker: Roger Bailey
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15
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