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LHC Critical Areas EN-EL equipment

LHC Critical Areas EN-EL equipment. Critical Locations. Safe rooms, US%, UA%, UJ56, UJ76, RE% Experiment Caverns. Dry transformers, LV Switchboards, UPS, batteries 48VDC sources General Emergency Stop Racks RTU, DAU, PLC. RadWG – M. Munoz. 18 May 2010. Other Locations.

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LHC Critical Areas EN-EL equipment

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  1. LHC Critical AreasEN-EL equipment RadWG – M. Munoz

  2. Critical Locations Safe rooms, US%, UA%, UJ56, UJ76, RE% Experiment Caverns Dry transformers, LV Switchboards, UPS, batteries 48VDC sources General Emergency Stop Racks RTU, DAU, PLC RadWG – M. Munoz 18 May 2010

  3. Other Locations RR%, UPS% UJ14, UJ16, UJ23 UW85 Tunnel: Emergency Stop Buttons Lighting Safety lighting F1, F2, F3, F4 distribution boxes Dry transformers, LV Switchboards, Emergency Stop Buttons Lighting RadWG – M. Munoz 18 May 2010 3

  4. EN-EL Safe Rooms Main equipment: • General Emergency Stop Racks • 48VDC sources, batteries and distribution crates • UPS and UPS battery cubicles (except in UJ56, UJ76, US85) • Low voltage distribution switchboards • Racks with the equipment necessary to control and monitor the electrical equipment. • Other services: • GSM • Fire detection • Red téléphone network… RadWG – M. Munoz 18 May 2010

  5. US85-0 options Additional shielding UL86 RadWG – M. Munoz 18 May 2010

  6. US85-1 relocation • Four UPS units (machine and cryogenics)  UA. • Sensible to radiation since their logic depends on transistors, CMOS, IGBTs, microprocessors and other electronics. • EYQ% rack with cryogenics 24VDC generation. • 24VDC PROMEC modules with electronic components sensible to radiation (EPROMs, diodes, MOS, microprocessors, transistors…) powering cryogenics control PLCs. RadWG – M. Munoz 18 May 2010

  7. Shielding: 1.5 m UJ56 options EBD1/56 EAD1/56 EBD2/56 EAD2/56 Tfo ESD2/56 RMU Solution 1: If equipment can stay EOD1/56 ESD1/56 48V AUG Rack, LV Switchboards, 48VDC Distribution EN-EL/ICL du 5 mai 2010 18 May 2010

  8. UJ56 options Racks de stockage des spares convertisseurs UJ561 EN-EL/ICL du 5 mai 2010 8 18 May 2010

  9. UJ76 relocation • UPS’ relocated to TZ76. • Fenced Safe room: EBD, EAD, RMU, Transformer • Concrete Safe room: AUG, 48VDC, EOD, ESD. RadWG – M. Munoz 18 May 2010

  10. General Emergency Stop Racks PCBs with the logic for the AUG safety functions. I/O cards, capacitors, diodes and integrated circuits. The safety logic is done via contacts and relays that in principle should not be affected by radiation (LEP equipment). Determine behaviour in presence of radiation  Monitoring? RadWG – M. Munoz 18 May 2010 10

  11. 48VDC Sources Placed in safe rooms + RE%. Ackermann manufaturer. Redundant chargers. Power electronics and sensible components such as zener diodes, transistors, PCBs with integrated circuits, thyristor bridge and PLC. If charger fails  battery backup. Lost of 48VDC  AUG, ENS, HV protections, LV distribution, safety lighting Determine behaviour in presence of radiation.  Monitoring? RadWG – M. Munoz 18 May 2010 11

  12. LV Distribution Switchboards Power general services, CV, cryogenics, power converters, and LV distribution. Fuses, bornes, switch breakers… Electronics existing in some protections tripping devices. Micrologic in the tripping devices. Radiation effects either make the protections to switch off randomly or not to switch off at all, which might have important consequences in case of short-circuit or overload. Monitoring equipment and displays (DIRIS). No safety function, not right measurements or temporary supervision lost. RadWG – M. Munoz 18 May 2010 12

  13. Electrical Network Supervisor They are vital for our monitoring systems. These racks could be very sensible to radiation. Racks contain all of the equipment necessary to control and monitor the electrical equipment: DAUs (data acquisition units) RTUs (remote computers), microcontrollers, switches, ethernet… Possible radiation tests. RadWG – M. Munoz 18 May 2010 13

  14. Radiation deterioration ? Medium voltage transformers whose isolation “resine” (organic material) might decompose in the long term with radiation. Battery racks. Not affected by SEE. Deterioration? General Emergency Buttons. Plastic component that is deteriorated by radiation  button might set an AU safety function off. Safety of people is ensured. Annual tests of the AU system are carried out and campaigns of replacement of these AU buttons are foreseen. RadWG – M. Munoz 18 May 2010 14

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