1. 1 ) Infrastructure consolidation (TS/FM and TS/CE groups)
2) Equipment operation related problems
(TS/CV group)
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

2. Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007
TS/FM : Total or partial repair work of roofs;
reinforcement work on travelling cranes supports
TS/CE : Corrective maintenance work
on underground infrastructures
TS/CV : Major Events on CV equipment
(PS and SPS machines);
corrective measures and global analysis
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

3. Roofs consolidation programme 2006 – 1/2
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
Roofs consolidation programme 2006 – 1/2
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

4. Roofs consolidation programme 2006 – 2/2
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
Roofs consolidation programme 2006 – 2/2
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

5. BA80 TOT 320 kCHF Construction year 1977 Tot SURFACE 3660
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
BA80
Construction year 1977
Tot SURFACE 3660
Partial repair on 200m2 in June 2006
Total repair in July-October 2006
TOT 320 kCHF
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

6. BA2 TOT 340 kCHF Contruction year 1973
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
BA2
Contruction year 1973
Tot SURFACE 2285 m2
Total repair in January-March 2006
TOT 340 kCHF
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

7. BB4 (+BHA4) TOT 160 kCHF Construction year 1981 Tot SURFACE 680 m2
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
BB4 (+BHA4)
Construction year 1981
Tot SURFACE 680 m2
Total repair in September-November 2006
TOT 160 kCHF
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

8. BA6 TOT 350 kCHF Construction year 1975 Tot SURFACE ~2170 m2
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
BA6
Construction year 1975
Tot SURFACE ~2170 m2
Total repair
in November 2006 – March 2007
TOT 350 kCHF
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

9. BA7 TOT 170 kCHF Construction year 1976 Tot SURFACE 1726 m2
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
BA7
Construction year 1976
Tot SURFACE 1726 m2
Total repair in October-December 2006
TOT 170 kCHF
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

10. Consolidation of machine buildings roofs -> TOT 1’180 kCHF
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
BA80
BA2
BB4
BA7
BA6
Consolidation of machine buildings roofs
-> TOT 1’180 kCHF
= 70% of TS expenditures
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

11. BB4 Global campagne LHC + SPS TOT 40 kCHF
TS/FM : ROOFS, TRAVELLING CRANES CONSOLIDATION
BB4
Global campagne LHC + SPS
TOT 40 kCHF
Travelling crane supports reinforcement
June – October 2006
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

12. LSS3 TOT 70 kCHF Water leakages treatment with an umbrella solution
TS/CE : MAINTENANCE WORK ON TUNNELS
LSS3
Water leakages treatment with an umbrella solution
and repair of the concrete vault
shut-down
TOT 70 kCHF
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

13. TT2 TOT 200 kCHF Water leakages treatment
TS/CE : MAINTENANCE WORK ON TUNNELS
TT2
Water leakages treatment
To be partially realised during shut-down
TOT 200 kCHF
(hors changement de câbles)
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

14. TS/CE : MAINTENANCE WORK ON TUNNELS
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

15. SPS TOT 250 kCHF Water leakages treatment
TS/CE : MAINTENANCE WORK ON TUNNELS
SPS
Water leakages treatment
To be partially realised during shut-down
TOT 250 kCHF
Secteur BA2- BA3
Secteur BA2- BA1
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

16. Secteur BA4-BA5 LSS6 TS/CE : MAINTENANCE WORK ON TUNNELS
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

17. TT10 TT20 TS/CE : MAINTENANCE WORK ON TUNNELS
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

18. Generation of false flow interlock
TS/CV : MAJOR EVENTS
BA2
SPS stopped due to equipment interlock on BA2 (30-Jun-2006)
Failure Mode
Failure Effect
Failure Cause
Failure Remedy
General Remarks
Generation of false flow interlock
Flow interlock sent towards the 4 primary power supplies for SPS, stopping the accelerator (12’)
Intermittent flow interlock generated by IM (multiplexer) unit via demineralised water circuit 211 (Main Magnet)
Several actions undertaken in order to resolve the problem, i.e. I/O card in question changed, as well as power supply and cabling. Signal delay generating interlock between demineralised water station and power supplies (rectifiers) increased from 10” to 60” in accordance with AB-PO, in order avoid further stops due to temporary nature of fault. Also, the pressure transmitter of the demineralised water circuit 211 was investigated. An intermittent 30 ms power glitch was observed via oscilloscope
Due to the temporary nature of the generation of the interlock, several stops took place before understanding the cause of the problem, which was then resolved.
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

19. TS/CV : MAJOR EVENTS
CTF3
Stopped due to LPI demineralised water cooling problem (03-Jul-2006)
Failure Mode
Failure Effect
Failure Cause
Failure Remedy
General Remarks
High temperature on LPI secondary circuit motor windings
LPI Secondary motor pump units PS3 & PS4 stopped, one after the other, resulting in the stop of the CTF3 accelerator (7’) due to lack of flow
Flow demand on user side (CTF3) has been set to > than the nominal flow capacity of the PS3 & PS4 motor pump units, resulting in the units running outside their rated performance, hence the temperature increase
Demineralised water flow towards CTF3 has been adjusted (limited) in order to enable the motor pump units to work within their rated capacities
Also, the ambient temperature surrounding the LPI pumping station has been lowered
The cooling capacity provided by the LPI demineralised water circuits was and is still sufficient in respect to the user.
The users have to adjust their flow requirements once only, instead of changing the process parameters continuously, in order to avoid this problem.
Measuring and balancing of circuit done by TS-CV
Happened twice on 2006!
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

20. Primary water pump and cooling tower start up failure
TS/CV : MAJOR EVENTS
COMPASS
Stopped due to cooling water problem on North Zone (25-Jul-2006)
Failure Mode
Failure Effect
Failure Cause
Failure Remedy
General Remarks
Primary water pump and cooling tower start up failure
High temperature on North Zone primary water due to lack of cooling, resulting in the stop of the COMPASS experiment (1h 45’)
Faulty configuration of pump and tower start up sequence, as the last pump blocked the start up sequence due to the pump itself having a start up set point > than the trigger signal sent via the basin level meter. The resulting signal eventually sent from the level meter became erroneous, as the water level rose above the sensor itself, effectively contributing to blocking the start up sequence
Set point of the pump start up sequencing for the pump concerned has been lowered to match the trigger signal sent from the level meter in the basin.
A more thorough analysis by the TS-CV maintenance contractor could have resolved the problem, before actually affecting the COMPASS experience.
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

21. Primary water cooling pump PP1 failure
TS/CV : MAJOR EVENTS
PS BOOSTER
Stopped due to Centre Anneau cooling water problem (24-Oct-2006)
Failure Mode
Failure Effect
Failure Cause
Failure Remedy
General Remarks
Primary water cooling pump PP1 failure
High temperature on Centre Anneau demineralised water distribution due to lack of primary water cooling, resulting in the stop of the Booster accelerator (4h 30’)
Several micro power cuts experienced due to weather conditions are supposed to have stopped the primary water pump PP1, as well as other installations in the Booster, PS and SPS accelerators
Primary water pump unit PP2 was put into service instead of PP1, which will be further examined as a consequence of the stop
No alarms received in TI about the Centre Anneau cooling circuit, although alarms were active locally, which did not facilitate the fault finding on the Booster installations.
Software modification in PLC is foreseen in order to eliminate this problem
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

22. Demineralised water flow failure
TS/CV : MAJOR EVENTS
PS HALL EST
Stopped due to Zone Est cooling water problem (09-Nov-2006)
Failure Mode
Failure Effect
Failure Cause
Failure Remedy
General Remarks
Demineralised water flow failure
Lack of demineralised water flow in Zone Est circuit which eventually stopped the circuit and as a result the Hall Est experiment and the PS (4h 50’)
Gradual emptying of the demineralised water expansion tank due to several minor water leaks on different pumping stations, effectively preventing the water make up system to refill the tank, as the volume of the water leaks were > than the volume of the make up water volume
Expansion tank was filled up manually and the make up water system was tested. No faults were found on the system.
This stop could have been prevented as the TS-CV maintenance contractor was alerted to the problem already 24h in advance.
Additional training for the contractor was carried out by TS-CV personnel
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

23. Demineralised water flow failure Repair of faulty tower organized
TS/CV : MAJOR EVENTS PS
Stopped due to Aimant PS cooling water problem (13-Nov-2006) - 1/2
Failure Mode
Failure Effect
Failure Cause
Failure Remedy
General Remarks
Demineralised water flow failure
Increase of demineralised water temperature in Aimant PS circuit, which eventually stopped the circuit and as a result the PS (2h 20’) and SPS accelerators (1h 20’)
One of the two tower fans were stopped due to fan imbalance as the fan blade had been rubbing against tower housing, eventually puncturing it and as a consequence stopping the unit.
Tower unit has been taken out of service and the station has been restarted with only the remaining tower in service.
Demineralised water temperature are being monitored
Repair of faulty tower organized
(febr. 2007)
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

24. PS Stopped due to Aimant PS cooling water problem (13-Nov-2006) - 2/2
TS/CV : MAJOR EVENTS PS
Stopped due to Aimant PS cooling water problem (13-Nov-2006) - 2/2
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007

25. External Error (weather, supply or users)
TS/CV : MAJOR EVENTS
Global overview on majors events causes
Failure Origin 
Human Error
(CV staff or
CV contractor)
External Error (weather, supply or users)
Aging of Equipment
EquipementFault
BA2 X
CFT3
COMPASS
PS BOOSTER
PS HALL EST PS
Cristiana Colloca TS/FM – ATC/ABOC - JANVIER 2007