K. Foraz - Machine Advisory Committee 1

Overall planning, consolidation, stops, time line

K. ForazMAC – April 27th 2010

April 27th 2010

Contents

• 2 years cycles– Technical stops– Xmas breaks

• Shut-down 2012– LHC– Injector chain

• Overall timeline & conclusions

April 27th 2010 2K. Foraz - Machine Advisory Committee

2 years cycle: Global strategy

• Operate machines on a 2 year basis

• Technical stops to solve N.Cs and anticipate preventive maintenance

• Mid-period: Xmas break to perform minimum maintenance activities

April 27th 2010 3K. Foraz - Machine Advisory Committee

2 years cycle: LHC monthly technical stops

• 3 days each month:– to anticipate preventive maintenance

• started: ventilation, fire, gas, access, sniffer…

– to perform minor consolidation works:• Heaters on current leads, QPS

– To solve non conformities encountered during operation: • Cryogenics, ventilation, leaks, instrumentation…

• 3 days during which ~ 1day is dedicated to RP survey, electrical lock-out and unlock-out– In late summer, we have to analyze if it would be more

efficient to increase the periodicity and the length of the technical stops (ex: 1 week each 7 weeks)

April 27th 2010 4K. Foraz - Machine Advisory Committee

2 years cycle: Injectors Technical Stops

Technical stops•3 days/quarter•Resources shared with LHC !!!

Observation of a rise in the number of faults occurring during operation, which might be attributed to the fact that only the “bare minimum” work was carried out in January, (example: interlocks being activated because drifting values reach the permitted limit levels)But reliability still high

April 27th 2010 5K. Foraz - Machine Advisory Committee

2 years cycle: Maintenance activities (1/3)

• Preventive maintenance activities have been sorted out by priorities

• Priority 1 corresponds to the minimum maintenance of the systems linked to legal or security requirements (personal / machine) : Cooling-towers, pumps, ventilation, AUG, UPS, cryogenics, fire-evacuation, ODH, gas. In addition for injectors: magnets replacement, LINAC2 source, PC Siemens (rotating machine) …

• Most of these activities can be performed in 4 weeks…but

April 27th 2010 6K. Foraz - Machine Advisory Committee

2 years cycle: Maintenance activities (2/3)

Example of duration drivers

LHC Cryogenic (part)Restricted preventive maintenance on LHC cryogenic

plants• Last full preventive maint. in winter 2008-2009 • Oil pumps exch.(former LEP compression stations plants ,

Compressors alignment, Tests of instrumentation sensors linked to security chains, Electrical insulation test on motors, Vacuum pumps maintenance , Calibration of the sensible analogical instrumentation, Cleaning of the water circuits between SF and cryogenic equipment, Surface main absorber replacement (charcoal)

2 weeks/points

Restricted preventive maintenance on LHC detectors (ATLAS & CMS) cryogenic plants

Lhe empting before and cool-down after maintenance(see next slide)

System given for 8’000 hours by firms12’000 hours shall be OKDecember 2011: 23’000 hours

Difficult to estimate the breakdown rates on these systems

April 27th 2010 7K. Foraz - Machine Advisory Committee

2 years cycle: Maintenance activities (3/3)

Cooling & ventilation (part)Cooling towers:

Cleaning only 3d / cooling towers = 5weeks

Pumping stations (LHC & injectors) Injectors not in parallel with LHC

1wk/ station = 6weeks

Last maintenance performed before February 2009 , Compensatory measures are being put in place

Fire-ODHFire-Evacuation•1 team for SPS (equipment DEF) 2 weeks •1 team for LHC and injectors (Sécuriton equipment) PS: 2 weeks + LHC-EVAC: 2weeks (Xmas) + LHC-fire (3weeks) + Experimental racks (3weeks)

S= 10weeksunder study: additionnal resources ,anticipation during technical stops

Gaz-ODH (1 équipe)•SPS : 3 weeks + LHC: 3weeks + LHC-Flash: 2weeks (Xmas)

= 8 weeksunder study: additionnal resources ,anticipation during technical stops

April 27th 2010 8K. Foraz - Machine Advisory Committee

2 years cycle: Xmas breaks

Subject of the Xmas breaks is being studied with 2 options:7 weeks break 11 weeks break

Minimal lengthSkip of cleaning of the cooling towers, maintenance of cryogenics compressors

Additional resources to be found for gas, fire, access, electricity…

Risks of breakdown during operation increased

Minimal maintenance

Additional resources to be found for gas, fire, access (seems feasible)

Mitigation of risks of breakdown during operation

Request from Hiradmat project: 8 weeks

April 27th 2010 9K. Foraz - Machine Advisory Committee

Availability of the machine during operation versus

Xmas break length (mimimum maint.)

2 years cycle - conclusions

• Technical stops– N.C. solving, anticipation of preventive maintenance,

minor consolidations– LHC: Increase frequency & length or not– Injectors: 3 days/quarter

• Xmas breaks – 7/11weeks– Dilemma between risks & length of operation– Resources– Hiradmat project needs 8 weeks

Do not worsen the situation

April 27th 2010 10K. Foraz - Machine Advisory Committee

2012 Shut-down

• LHC - Main consolidations to be performed– Interconnections (see talk of Francesco Bertinelli)

– R2E (see talk of Roberto Losito)

– Collimators (see talk of Ralph Assman)

• Injector chain

April 27th 2010 11K. Foraz - Machine Advisory Committee

2012 Shut-down – LHC: Interconnections (1/3)

Sector 1

Sector 2

0 5 10 15

InterconnectionsRate = 50 IC/week,14 wks for 1st sector 5 wks later for 2nd sector

From warm-up to powering tests

Powering tests

Warm-up

Pressure test - last leak tests - flushing

ELQA @ warm

Cool=down

Powering tests

Warm-up

Pressure test - last leak tests - flushing

ELQA @ warm

Cool=down

ELQA @ cold

ELQA @ cold

0 5 10 15 20 25 30 35

?

April 27th 2010 12K. Foraz - Machine Advisory Committee

D J F M A M J J A S O N D J F M A

2012 Shut-down – LHC : Interconnections (3/3)Taking into account 15% of margin to absorb additional works, delays…, and postponing cool-down in order to ease access and works --- 16 months shut-down

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

April 27th 2010 13K. Foraz - Machine Advisory Committee

D J F M A M J J A S O N D J F M A

2012 Shut-down – LHC : Maintenance

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

One entire year is enough for the maintenance Schedule maintenance as late as possible / remaintain --- 2 years of operation

April 27th 2010 14K. Foraz - Machine Advisory Committee

2012 Shut-down – LHC : Collimation (1/2)

Success oriented:Readiness for installation (point 3) : 2012Then 13 weeks are needed to close, test, leak test the IC’s afterward

Conservative:Installation (point 3) : shut-down 2015

April 27th 2010 15K. Foraz - Machine Advisory Committee

D J F M A M J J A S O N D J F M A

2012 Shut-down – LHC : Collimation

April 27th 2010 K. Foraz - Machine Advisory Committee 16

Latest collimator: end of December -> end of the shut-down end of June !!

Being ready earlier will have an impact on the end date, because of the interconnection resources. Schedule will be reviewed as soon as a technical solution will be adopted’

Delay the collimation installation in 2014-2015 will certainly increase the length of the 14-15 shut-down (6months)

0 5 10 15 20 25 30 35 40 45 50 55 60 65 70

Sector 23

Sector 34

D J F M A M J J A S O N D J F M A

2012 Shut-down – LHC : R2EAt least 9-10 months are available.Shielding at points 1 & 5 and relocation of equipment at point 7 & 8 are being studied.9-10 months looks OK, but need to check with resources used by other interventions

April 27th 2010 17K. Foraz - Machine Advisory Committee

2012 shut-downs - Injectors

• Ususal maintenance activities: – electricity, cooling & ventilation, fire…

• Usual shut-down works:– RF, magnets, cables, kickers

• Projects (if approved)– Consolidation– PSB @ 2GeV– SPS upgrades (RF,…)

April 27th 2010 18K. Foraz - Machine Advisory Committee

2012 shut-down: conclusions

• 16 months shut-down, driven by interconnection works, taking into consideration 15% margin from strict minimum. – Includes interconnections, R2E, maintenance

• Collimation:– Latest collimators ready in December – 2 additional

months– To be looked at in detail mid 2010

• Maintenance & R2E: OK

April 27th 2010 19K. Foraz - Machine Advisory Committee

2010 2011 2012 2013 2014 2015

Overall timeline & Conclusions

– Xmas breaks & Technical Stops• Lenght of Xmas break to be decided in July: 7 weeks vs 11 weeks

– Dilemma between risks & length of operation– Resources– Hiradmat project - 8 weeks

• Injectors: minimal maintenance & minimal tech. Stops => number of faults

– Shut-down 2012• LHC = 16 months shut-down

– driven by the interconnection project– OK for maintenance & R2E– Re-evaluation after the choice of the technical solution for the collimation project

• Injectors = 2 * 4 months

LHC

Injector chain

April 27th 2010 20K. Foraz - Machine Advisory Committee