1. EN-CV activities for LHC during LS2

2. Maintenance

3. Impact of the maintenance on the CV services
2019
2 months(*)
2020
3 weeks (*)
2019
1 month
2020
3 weeks
2019
1 month
2020
3 weeks
2019
1 week
2020
1 day
(*) except for the cryo if needed

4. Maintenance Mechanical and/or chemical cleaning of heat exchangers
Safety requirements (vessels,..)
Mechanical revision of valves, pumps, ..replacement of piping component (flexible sleeves)
Maintenance of busbar for power cubicles.
Instrumentation calibrations
Bugs fixing and functionnal tests.

5. Projects and consolidation

6. Chilled water production consolidation at SU4 and SU6
What
Removal of existing chillers and installation of new ones, modification of the piping network
Handling of the chillers
New slabs
New power supplies
When
SU4 : January-March 2019
SU6 : October-Novembre 2019
Impact on process
No chilled water available

7. New HVAC system for SR1 What Removal of the exisitng AHUs
Installation of the new ones
New power supplies
Handling of AHUs
Co-activities during the dismantling and installation phase in the surrounding area
When
Decembre 2019-March 2020
Impact on process
No HVAC (installation of a provisionnal heating system)
No smoke extraction
Possible compensatory measures (based on past experience)
Avoid unecessary storage of flammable material
Notify the firebrigade
Install a mobile CO2 fire extinguisher (optional)

8. Projects and consolidation
New control system for SPS loop (bldg. 863) providing water to cryo point 18 (4 weeks);
SIG pumping stations (WSNET, WSSPS and WSLHC): replacement of control system;
New control system for for SEQ cooling plants (2 months);
HL LHC:
Installation of 4 airlocks ventilation in Pt 1 and 5- Planning TBD with HL works;
Modificiation in point 4 – TBC;
New control system for ATLAS and CMS ventilation system. For CMS 2019 Q1 and Q2, for ATLAS 2019 Q2 and Q3;
Migration of control for USC55 cooling system;
New cooling tower in point 18. Stop for 3 months;
CMS increase of cooling capacity. Stops to be foreseen;
LHCb and ALICE: installation of containers for data acquisition. Stops to be foreseen on demineralised water supply circuit.