Did you know?

Your first contact during LS3 at CMS Point 5

The LS3 Technical Shifter, based in the CMS Control Room (B.3562/R-005), is your first point of contact for any request relating to training, accesses, key management, and routine operational and facility requests (e.g. broken doors, sanitary installations that aren’t working, etc.).
If a fault affects safe access, evacuation or protection, report it promptly through the safety channel.
For emergencies, call +41 22 767 4444.

Safety is everyone’s responsibility

CMS Safety supports management and individuals through advice, monitoring and assigned safety tasks. This does not transfer their safety responsibilities. HSE also has specific responsibilities, including radiation protection, occupational medicine, fire and rescue, and safety clearance for activities with major safety implications.
Every individual is responsible for their own actions, and the responsibility line runs through your supervisor up to your hierarchical line.

What CFRS actually does

The CERN Fire and Rescue Service is available 24/7 – not just for fires. Among others, they respond to medical emergencies, carry out rope rescues, support confined-space work, maintain fire extinguishers across the site, and help draw up Building Emergency Plans.

Red telephones

Red telephones are a direct landline to the CERN Fire and Rescue Service (CFRS) – picking one up to initiate an emergency alarm (Level 3 Alarm): state your precise location and explain what happened.
They’re installed in strategic areas such as dedicated buildings and underground installations, and are for emergency use only.
If activated accidentally, stay on the line, explain the mistake and follow the operator’s instructions..

Basic PPE

Your supervisor must ensure that suitable PPE is provided under the applicable CERN, home-institution or contractor arrangements.
Check both area requirements and the activity’s risk assessment.
Inspect PPE before and after use, follow its instructions, and ensure required formal inspections are current.
Any doubts or questions, contact the CMS Safety Office.

AUG, AUL, AUE: Know your emergency stops

AUG (Arrêt d’Urgence Général) and AUL (Arrêt d’Urgence Local) emergency stops act on the installation or local they protect; equipment emergency stops act on the equipment concerned. Some safety circuits remain powered, identified by the prescribed orange stripes/markings.
An emergency stop does not make an installation safe for maintenance: electrical and other hazards may remain.
Familiarise yourself with local emergency controls before starting work.
Activate an emergency stop when a dangerous situation is imminent or occurring.

The magnetic field is never really “zero” everywhere

Measurements show that some areas underground at CMS still register a magnetic field above 0.5 mT even when the CMS magnet is switched off – strong enough to affect an active implanted medical device. That’s why anyone with an Active Implanted Medical Device (e.g. pacemaker, defibrillator, infusion pump, etc.) is barred from the underground areas at all times, magnet on or off.
Worker access may require a dedicated risk assessment and medical fitness certification.

Leave field sensitive items on the surface

When the CMS magnet is on (3.8 Tesla in the core), credit cards, car keys, mechanical watches, and anything else with a magnetic strip or other sensitive devices can suffer damages.