1. 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

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

3. 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

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

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

6. Bernard Pirollet TS-CV-EPA
USC ventilation principle
Supply Extraction (m3/h) Gas
Service area
Post treatment
Racks areas
Post treatment /
Bernard Pirollet TS-CV-EPA

7. 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

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

9. 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

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

11. 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
Extraction gaz Argon
Argon gas Extraction M
BLO
MRE
SX 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

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

13. Bernard Pirollet TS-CV-EPA