Operation TCR

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

• Niels.Schionnemann_at_Cern.ch

2
Electrical events

• 19/08 1842 Electrical disturbance of 400 kV EDF
  due to storm, main PS magnet tripped. No
  electrical equipment switched off.
• 1915 PS running again
• 19/08 2108 Compensator 1 BE tripped due to
  storm. SPS and PS stopped.
• 2121 PS running again
• 2140 Meyrin filters fall out. PS still ok
• 2214 Compensator in BE ok, SPS running
• 2229 Meyrin filters ok
• 20/08 0034 Compensator 1 BE tripped due to
  storm. PS and SPS stopped
• 130 PS and SPS running again

Niels Schionneman ST/MO/TCR
3
Electrical events

• 20/8 0648 Short circuit in transformer EHT3 BE
• Transfo was idling but the short circuit caused
  an unbalance in the network and made the
  compensators trip.
• Demi water off Prevessin and Meyrin
• PS and SPS stopped
• Electrical problem solved at 720
• Cooling PS ok at 920
• Cooling SPS ok at 1020

Niels Schionneman ST/MO/TCR
4
Electrical events

• 29/8 1847 Explosion in 18kV breaker sub-station
  7
• 7 18kV breakers in the PS loop trip
• The 66kV supply for the transfo SEH1 tripped.
  Meyrin off tension
• Auto transfer switched to EOS after 5 sec
• The 18kV trips due to malfunction of protection
  equipment/selectivity problem
• PS and SPS stopped for 24h

Niels Schionneman ST/MO/TCR
5
CV events concerning PS

• 3/7 1420 Water leak alarm in PS
• Demanded access but found no leak. Drains were
  blocked and condense water from air condition
  caused the water level to raise
• 1533 PS running again
• 4/7 2143 Cooling problem in 361
• MCR can not switch on main magnet due to high
  temperature in 361
• Ventilator in cooling tower not running on max
  speed
• 2343 PS running again

Niels Schionneman ST/MO/TCR
6
CV events concerning PS

• 15/7 901 PS demi water stopped
• A UPS supplying the PLCs for the demi water
  stations had tripped due to water infiltration
• UPS bypassed and PLCs and water stations started
• 1125 PS running again
• 19/8 243 and 719 Demi water station 359
  stopped. PS stopped
• Station stopped twice due to heavy storms.
  Started station manually
• 305 and 739 Cooling ok

Niels Schionneman ST/MO/TCR
7
CV events concerning PS

• 20/8 1900 Demi water for TT2 stopped
• No beam for SPS
• No alarms received in TCR
• Magnet in TT2 supplied from TOF line. To be
  changed
• 2020 Cooling station in 378 started again
• 23/8 2015 Demi water temperature too high in
  East area
• Pumping station running on max
• Primary water temperature at 25 degrees due to
  very warm weather.
• Informing MCR. Situation unchanged all night

Niels Schionneman ST/MO/TCR
8
CV events concerning PS

• 25/8 1510 Pump in cooling circuit for ISOLDE
  exploded
• ISOLDE stopped
• No fluid alarms in TCR, only electrical alarm
• Isolated pump and started spare pump
• 1540 Cooling ok

Niels Schionneman ST/MO/TCR
9
CV events concerning SPS

• 6/7 1745 Temperature interlock on main magnet in
  BA3. SPS stopped
• Supply valve closed on primary side of heat
  exchanger
• 1938 SPS running again
• 9/7 1145 Temperature interlock on septum magnet
  in BA6. SPS stopped
• Pump stopped by faulty pressure sensor
• 1230 SPS running again
• 27/7 1025 BA6 cooling off. SPS stopped
• CV working on PLC for BA6 cooling. A faulty
  Siemens module caused the station to stop
• 1055 SPS running again

Niels Schionneman ST/MO/TCR
10
CV events concerning SPS

• 2/8 1427 Demi water BA81 stopped due to water
  leak. No beam for North area
• Access to machine given but leak is not found
• Manages to start pumps and refill continuously
• 1539 North area beam back on
• 5/8 Compensator tripped due to missing cooling in
  BA3. SPS Stopped
• No alarms in TCR
• Cooling stopped due to problem with the PLC
• 1940 SPS running again
• 10/8 2040 Same problem as above
• 2130 SPS running again

Niels Schionneman ST/MO/TCR
11
CV events concerning SPS

• 27/8 420 Cooling for septum magnet BA2 stopped.
  SPS stopped
• No alarms in the TCR. Pump restarted from TCR
• 422 SPS running again

Niels Schionneman ST/MO/TCR
12
CV events concerning SPS

• 2/9 431 3/9 456 Demi water BA3 stopped. No
  alarms in TCR
• Problem seen when compensator in BB3 tripped
• SPS stopped for 1h each time
• Cooling stopped due to error in PLC
• 3/9 2359 Demi water for CAV2RF1 BB3 stopped
• SPS stopped for 3.5h
• Cooling stopped due to electrical problem on pump
  for CAV2 circuit. Pumps started in forced mode.

Niels Schionneman ST/MO/TCR
13
Various events

• 14/7-15/7 RTserver crashes several times
• Different zones at Meyrin without supervision for
  various periods.
• Fire brigade instructed to do rounds and keep a
  close eye on the synoptic.
• 16/7 Bugs found and fixed by IN. Situation back
  to normal.
• 27/8 355 Vacuum sector valve closed TS1 and TS2.
  SPS stopped.
• 400 Valve in TS1 opened. OK for SPS
• 410 Valve in TS2 closes
• 412 Valve in TS2 opened. OK for SPS

Niels Schionneman ST/MO/TCR