CMS ventilation system Air handling units Principle LHC status UX ventilation modes USC ventilation principle Fire detection and smoke extraction Pressurization safe areas Gas extraction Other buildings Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA Air handling units SUX 50 units installed SH Bernard Pirollet TS-CV-EPA USC

Bernard Pirollet TS-CV-EPA Air supplied & air extracted Quality Pressurization Temperature Dew point Smoke and gas extraction Principle BRR/T D M N S L - E V P BA6 BAY BFY BTO BT2 BLP MRM BLO MRE BTT BTB BTA + PRB 180 210 M L BAY BA6 BLO MRE Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA Principle LHC status Cap open / Cap closed LHC run / Shut down Purge Emergency Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA UX ventilation modes Supply Extraction (m3/h) Gas Cap open Shut down 22 500 30 000 (SX) 0 Cap closed Shut down 22 500 22 500 5 000 Cap closed LHC run 22 500 22 500 (recycling) 5 000 Purge (fresh air) 22 500 22 500 (RP control) 5 000 Emergency Cap closed 90 000 90 000 5 000 Emergency Cap open 90 000 90 000 (SX) 0 Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA USC ventilation principle Supply Extraction (m3/h) Gas Service area 20 000 20 000 5000 Post treatment 40 000 Racks areas 20 000 20 000 5000 Post treatment 13 000/ 26 000 Bernard Pirollet TS-CV-EPA

All the air handling units of the concerned area are Cold smoke extraction Actions Detection Fire men All the air handling units of the concerned area are automatically stopped (Ts/cv) Smoke extraction mode activated by fire men (fire men cubicle) During extraction mode extraction filters will be by-passed End of fire men action No action with RP Air handling units in normal mode restarted by TS-CV Material design 400°C/2h Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA “Fire cubicle” Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA Pressurization areas 3 separate & independent areas: Experimental caverns (-) (UX pts 1/2/8 & UXC55 pt5) Protected areas- technical caverns (+) (USA 15 pt1,UX 85 pt8 & USC55 pt5) Safe area (++) (PM/PZ) M M M D S L N E L E V M M M D S L N E L E V M M M D S L N E L E V (-) UXC55 Differential pressure (+) PX56 (+ +) Services Racks Bernard Pirollet TS-CV-EPA PM54 USC55

Bernard Pirollet TS-CV-EPA Pressurization safe areas Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA Gas extraction UX USC55 PX56 PM54 UXC55 Cryogénie Racks SUPERVISEUR : J.ROCHE INDICE CERN ORGANISATION EUROPEENNE POUR LA RECHERCHE NUCLEAIRE EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH C.MARTEL 22/02/2000 UAEW-519/520-SX5-UXC55 Extraction mélange gazeux / Mixing gas extraction Schéma de principe - Principle schematic LHCU.3599.1011.4 Extraction gaz Argon Argon gas Extraction M BLO MRE SX5 - 3585 - Espace confié / Confined room 5 000 m3/h A 5 000 m3/h BLO BLO standby BLO MRE BAY BAY BAY MRE MRE BA6 M BAY M M A M M L L L V BD1 5 000 m3/h BT5 UAEW-519-SX5-UXC55 BLO BAY BLO BLO MRE BAY BAY MRE MRE BA6 M BAY M M M L L L V UAEW-520-SX5-UXC55 UIAE UIAN Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA Gas extraction USC Bernard Pirollet TS-CV-EPA

Bernard Pirollet TS-CV-EPA