EN-CV interventions during YETS 2015-201622-09-2015

Maintenance

Cooling: yearly maintenance• 3 weeks of stop for the SF, SU, UW

• Mechanical cleaning of the cooling towers

• Mechanical and electrical maintenance

• Bugs fixing

SF

UW

SU

Ventilation: yearly maintenance• No stop but redundancy affected during the maintenance.

• Intervention mostly on the surface.• Tunnel air handling units• Accessible areas (US, UA) air handling units

• Experimental cavern UX air handling units

• Yearly maintenance of the 174 underground units should be finished by TS3 (corrective actions could be needed during YETS)

Planning for EN-CV maintenance - tbc • LHC points Stop Restart

Point 1 14th of December 15 15th of January 16

Point 18 tbd

Point 2 1st of February 16 19th of February 16

Point 3 22th of February 16 26th of February 16

Point 4 11th of January 16 29th of January 16

Point 5 14th of December 15 15th of January 16

Point 6 1st of February 16 19th of February 16

Point 7 22th of February 16 26th of February 16

Point 8 11th of January 16 29th of January 16

Additional works

Point 1 – additional works• ALFA cooled cables in RR13 and RR17• Installation of by-pass on the ATLAS US15 mixed water circuit

• Qualification of the compressed air vessel in SH1 + installation of valve. (stop needed)

• SF1: dismantle and repair cooling towers silencers

• Modification of the firefighting water circuit in SUX1

• USA15: replacement of the ED pumps, filling circuits and installation of additional valve.

Point 18 – additional works• Full replacement of the cryo underground cooling plant in PM18• 4 weeks of stop

• Tbc by the Consolidation for the budget

• Tbc by the cryo and MEF for the time window

Point 2 – additional works• SX2: modification of the pipework to install an Eletta for TE/EPC

• Replacement of the leaking valve in point 3 requesting to stop and empty the sector 2-3

• Work in UW25 to replace flexible sleeves and modify pipework

• Replacement of the raw water blocked valve in UL26

• Replacement of the ventilation unit for ITS in SX2

• Preparatory works for the replacement of the SR2 ventilation system (foreseen during EYETS). Intervention in the false floor: lockout required.

Point 3 – additional works• PM32 consolidation phase two

• Tbc by the Consolidation (budget)• 6 weeks of work. Most of it in surface.

• Preparatory works for the replacement of the SR3 ventilation system (foreseen during EYETS). Intervention in the false floor: lockout required

Point 4 – additional works• SU4 migration of the cooling control system → Unicos• 4 weeks of stop (+maintenance)

• SH 4 migration of the ventilation control system → Unicos (3 weeks)

• SHM 4 migration of the ventilation control system → Unicos (3 weeks)

Point 5 – additional works• SUX5 migration of the cooling control system →

Unicos (tbc by CMS) • 3 weeks of stop (+maintenance)

• Mechanical maintenance on the ventilation in RR53 and RR57

• Modifications and repair of point 5 raw water in SD5. Raw water stopped and compensatory measure to discuss.

• Maintenance of Totem cooling plants in R532 and R571.

• Preparatory works for the replacement of the SR5 ventilation system (foreseen during EYETS). Intervention in the false floor: lockout required

• Fixed non-conformities in water connections on the cooled cables in RR53

Point 6 – additional works• SH 6 migration of the ventilation control system → Unicos (3 weeks)

• SHM 6 migration of the ventilation control system → Unicos (3 weeks)

• Work in UW65 to replace flexible sleeves and modify pipework

• Preparatory works for the replacement of the SR6 ventilation system (foreseen during EYETS). Intervention in the false floor: lockout required

Point 7 – additional works• Preparatory works for the replacement of the SR7 ventilation system (foreseen during EYETS). Intervention in the false floor: lockout required

Point 8 – additional works• Cooling test plant for future datacenter• Modification for a backup of the LHCb control room racks

• Modification of the UAPE-831 and 832 installation of VSD.

• Point bas: replacement of the pumps.• UW85 : replacement of the flexibles sleeves and additional support

• SH 8 migration of the ventilation control system → Unicos (3 weeks)

• SHM 8 migration of the ventilation control system → Unicos (3 weeks)

• Work in UW85 to replace flexible sleeves and modify pipework