Safety Organization
and Safety Measures
for the Installation of
LHC Experiments at CERN
Marc Tavlet, GLIMOS / ALICE
CERN, Switzerland, Europe
☺
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Safety Organization
and Safety Measures
for the Installation of
LHC Experiments at CERN
Outline:
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Safety Organization
Safety Teams
Procedures for personnel (and visitors)
Procedures for the work
However, accidents do happen…
Conclusions ?
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
5 International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
http://alice.web.cern.ch/Alice/Engineering/pictures/alices2.gif
th
5 International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
http://maridor.home.cern.ch/maridor/pic_alice/LAYOUT_2K/lay_out.html
th
Safety Organization at CERN,
according to SAPOCO/42
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Safety responsibilities follow the
managerial lines :
DG / CEO
PH Dept Head
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This scheme will be follow when the
detectors are commissioned and the
experiments are put into operation.
This scheme is valid outside LHC worksites. Ex: Test beam areas.
Tech. Coord. /
GLIMOS
Project Leader
Project Engineer
SAPOCO/42 = CERN’s law in mater of safety
http://safety-commission.web.cern.ch/safetycommission/sapoco42/index.html
Draftsmen,
technicians,
users…
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
BUT, Safety Organisation
for LHC Experiment Installations
Overall responsibility
of the Experiment
( PH Department )
Installation under
the responsibility of
TS Department
Experimental Area
Manager (EAM) = TSO
Technical Coordinator
/ GLIMOS
Project Leaders
Project Engineers
Designers,
technicians,
users…
+ RSO,
FGSO
Work-Package Eng.
+ Safety
Coordinator
Work-Package
Supervisors
Workers,
technicians,
users…
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Safety Team / Design
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GLIMOS = Group Leader in Matter of Safety,
accountable to the PH Department Head,
responsible for the overall safety of the Expt.
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FGSO = Flammable Gas Safety Officer
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RSO = Radiation Safety Officer
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INB link-person (French legislation / Nuclear Installations)
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Safety Coordinators = professionals who help the
Glimos, EAM and any supervisor
+ Experts of the Safety Commission
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Examples of Engineering Designs
for better Safety in the Detector
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Use of halogen-free flame-retardant cables (IS-23)
Use of halogen-free flame-retardant materials (IS-41)
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Halogen-free Printed Circuit Boards wherever possible
Avoid Polystyrene, Nylon… (PVC is forbidden !)
Metallic pipes for cooling instead of plastic ones
Silicone rubber to replace EPDM …
Non-flammable gas mixtures
Sniffer + N2 inertion systems
Safe switch-off of LV-PS in case of power failure
Grounding of all LV- and HV-PS
Fix ladders and platforms for better access
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Safety Team / Installation
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GLIMOS = Group Leader in Matter of Safety
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TSOs = Territorial Safety Officers
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EAM = Experimental-Area Manager
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Safety Coordinators = professionals who help the
Glimos and the EAM
+ Team for First-Aid (in any building)
+ Fire-Fighters of the Safety Commission
+ Inspectors of the Safety Commission
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Examples of measures taken for
better Safety during Installation
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Fire detection already operational
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Escape routes identified
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Priority to collective equipment vs personal ones
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Enforce wearing personal protective equipment as well
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Use scaffoldings (mounted by trained people) instead of ladders
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Any platform higher than 80cm must have protection
barriers + plinths
Adapted ladders and platforms to access ‘strange’ devices
…
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5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Procedure for Staff-Members
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Safety Training for any new-comer
+ specific training on the spot by Glimos + supervisor
+ specific training according to activities (welding, lifting,
work at height, …)
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Access rights (for specific areas - ?)
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Safety equipment
- standard
+ specific
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Rules for Visitors
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Visitors must be accompanied by a trained guide
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Max 12 visitors/guide on surface
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Max 7 visitors/guide underground
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Visitors must wear comfortable shoes + helmet
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Specific training (incl. Safety) for guides
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Dedicated visit circuits for guided tours
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Procedure prior the start of work
at experimental areas
W-P. Eng.
A.O.C
.
Safety
Coordinator
PPSPS
( + Fire Permit )
E.A.M.
W-P. A.M.
initiates
V.I.C.
Glimos
check
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Display of safety documents
+ procedure at the place of work
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Review of Accidents
during ALICE installation
Place
Dept
SXL2
SXL2
SXL2
Event
Victim
Damage
PH
Machining in the workshop (2 X)
hands
0
PH
Fall from a 80 cm platform
bassin
PH
Fall against a machine
lip
0
Break and fall of a hinge from a high door
no
hinge
0
SXL2
TS
SX-2
TS
Overhead crane
no
major
UX-25
TS
Overhead cranes (2 X)
no
minor
UX-25
PH+TS
Break of a tie-rod of dipole
no
tie-rod
UX-25
PH+TS
Scaffolding into the dipole
no
scaffolding
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
The overhead-crane accident:
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No precise written
procedure;
+ Procedure not
followed:
- Modification of
attachment point.
+ Modification of safety
switches.
- Crane hook went into
crane frame.
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
The scaffolding accident:
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Precise procedure was
written;
+ Procedure exclude the
use of the steel
scaffolding
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Staff ignored the
interdiction.
Consequence 
(fortunately, no one injured)
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005
Conclusions
We do have
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a safety plan, a safety team,
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safety procedures for personnel,
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safety training adapted to places and activities,
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safety procedures, including safety visits for work.
However, accident do happen !
Ways to reduce accident occurrence :
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More supervision on the spot,
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TALK to people (team spirit)
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…any good idea ?
5th International High-Energy Physics Technical Safety Forum at SLAC. April 11-15, 2005