1. Operation TCR Niels.Schionnemann@Cern.ch 2 nd of July to 10 th of September 2001 More than 20 major events Events grouped by equipment group and zone affected

2. Electrical events z19/08 18:42: Electrical disturbance of 400 kV EDF due to storm, main PS magnet tripped. No electrical equipment switched off. y19:15 PS running again z19/08 21:08: Compensator 1 BE tripped due to storm. SPS and PS stopped. y21:21 PS running again y21:40 Meyrin filters fall out. PS still ok y22:14 Compensator in BE ok, SPS running y22:29 Meyrin filters ok z20/08 00:34: Compensator 1 BE tripped due to storm. PS and SPS stopped y1:30 PS and SPS running again Niels Schionneman ST/MO/TCR

3. Electrical events z20/8 06:48 Short circuit in transformer EHT3 BE yTransfo was idling but the short circuit caused an unbalance in the network and made the compensators trip. yDemi water off Prevessin and Meyrin yPS and SPS stopped xElectrical problem solved at 7:20 xCooling PS ok at 9:20 xCooling SPS ok at 10:20 Niels Schionneman ST/MO/TCR

4. Electrical events z29/8 18:47 Explosion in 18kV breaker sub- station 7 y7 18kV breakers in the PS loop trip yThe 66kV supply for the transfo SEH1 tripped. Meyrin off tension yAuto transfer switched to EOS after 5 sec xThe 18kV trips due to malfunction of protection equipment/selectivity problem yPS and SPS stopped for 24h Niels Schionneman ST/MO/TCR

5. CV events concerning PS z3/7 14:20 Water leak alarm in PS yDemanded access but found no leak. Drains were blocked and condense water from air condition caused the water level to raise y15:33 PS running again z4/7 21:43 Cooling problem in 361 yMCR can not switch on main magnet due to high temperature in 361 yVentilator in cooling tower not running on max speed y23:43 PS running again Niels Schionneman ST/MO/TCR

6. CV events concerning PS z15/7 9:01 PS demi water stopped yA UPS supplying the PLCs for the demi water stations had tripped due to water infiltration yUPS bypassed and PLCs and water stations started y11:25 PS running again z19/8 2:43 and 7:19 Demi water station 359 stopped. PS stopped yStation stopped twice due to heavy storms. Started station manually y3:05 and 7:39 Cooling ok Niels Schionneman ST/MO/TCR

7. CV events concerning PS y20/8 19:00 Demi water for TT2 stopped xNo beam for SPS xNo alarms received in TCR xMagnet in TT2 supplied from TOF line. To be changed x20:20 Cooling station in 378 started again y23/8 20:15 Demi water temperature too high in East area xPumping station running on max xPrimary water temperature at 25 degrees due to very warm weather. xInforming MCR. Situation unchanged all night Niels Schionneman ST/MO/TCR

8. CV events concerning PS y25/8 15:10 Pump in cooling circuit for ISOLDE exploded xISOLDE stopped xNo fluid alarms in TCR, only electrical alarm xIsolated pump and started spare pump x15:40 Cooling ok Niels Schionneman ST/MO/TCR

9. CV events concerning SPS y6/7 17:45 Temperature interlock on main magnet in BA3. SPS stopped xSupply valve closed on primary side of heat exchanger x19:38 SPS running again y9/7 11:45 Temperature interlock on septum magnet in BA6. SPS stopped xPump stopped by faulty pressure sensor x12:30 SPS running again y27/7 10:25 BA6 cooling off. SPS stopped xCV working on PLC for BA6 cooling. A faulty Siemens module caused the station to stop x10:55 SPS running again Niels Schionneman ST/MO/TCR

10. CV events concerning SPS y2/8 14:27 Demi water BA81 stopped due to water leak. No beam for North area xAccess to machine given but leak is not found xManages to start pumps and refill continuously x15:39 North area beam back on y5/8 Compensator tripped due to missing cooling in BA3. SPS Stopped xNo alarms in TCR xCooling stopped due to problem with the PLC x19:40 SPS running again y10/8 20:40 Same problem as above x21:30 SPS running again Niels Schionneman ST/MO/TCR

11. CV events concerning SPS y27/8 4:20 Cooling for septum magnet BA2 stopped. SPS stopped xNo alarms in the TCR. Pump restarted from TCR x4:22 SPS running again Niels Schionneman ST/MO/TCR

12. CV events concerning SPS y2/9 4:31 + 3/9 4:56 Demi water BA3 stopped. No alarms in TCR xProblem seen when compensator in BB3 tripped xSPS stopped for 1h each time xCooling stopped due to error in PLC y3/9 23:59 Demi water for CAV2+RF1 BB3 stopped xSPS stopped for 3.5h xCooling stopped due to electrical problem on pump for CAV2 circuit. Pumps started in forced mode. Niels Schionneman ST/MO/TCR

13. Various events y14/7-15/7 RTserver crashes several times xDifferent zones at Meyrin without supervision for various periods. xFire brigade instructed to do rounds and keep a close eye on the synoptic. x16/7 Bugs found and fixed by IN. Situation back to normal. y27/8 3:55 Vacuum sector valve closed TS1 and TS2. SPS stopped. x4:00 Valve in TS1 opened. OK for SPS x4:10 Valve in TS2 closes x4:12 Valve in TS2 opened. OK for SPS Niels Schionneman ST/MO/TCR