Specific Safety Instructions (SSI)

  • SSI-FS-2-1

    Fire Safety and Radiation Resistance requirements for Cables

    The purpose of this Specific Safety Instruction is to define the minimum Safety requirements with respect to fire performance and resistance to ionising radiation of insulation and sheathing materials of Cables used in CERN Installations.

Safety Notes (NS)

  • NS 28

    CERN exhibition fire precautions (2002)

    This Safety Note is intended to lay down the safety precautions to be respected by exhibitors to ensure the safety of persons present in a CERN building where a temporary exhibition is being arranged.

  • NS 29

    Prévention des incendies dans le cas des structures de panneaux sandwich à âme isolante pour utilisation en intérieur Directives pour la sélection, l’installation et l’utilisation (2004)

    La présente note donne les prescriptions de sécurité pour la conception, la construction et l'utilisation de structures de panneaux sandwich à âme isolante. Elle fournit également des mesures complémentaires pour l'adoption, en tant qu'âme isolante, de matériaux dont l'utilisation est soumise à l'Instruction de Sécurité IS 41.

  • NS 3

    Fire prevention for enclosed spaces in large halls (2001)

    Recommendations for the choice of materials, installations and use of these large halls, and reminder of fire prevention actions to be taken.

Safety Instructions (IS)

  • IS 41

    The use of plastic and other non-metallic materials at CERN with respect to fire safety and radiation resistance (2005)

    This instruction is intended to ensure a very high level of safety and must be applied to all new installations at CERN, including modifications to existing installations. CERN attaches great importance to the hazards associated with the density, toxicity and corrosiveness of smoke from burning plastics. The document is complemented by tables of standards and specifications for the selection of plastics, and guidelines for their use.

  • IS 48

    Fire prevention for cables, cable trays and conduits (2001)

    This Safety Instruction defines rules and other preventive measures for cable fires. It lists the most common fire risks for cables and conduits. Mandatory precautions are specifically aimed at preventing cable fires in physics experiments where confined spaces, higher vicinity risks and lack of effective electrical protections add up to an increased risk of ignition.

Safety Codes

  • E

    Fire protection (1995)

    This code sets out the fire prevention and protection rules and procedures to be followed in order to ensure primarily the safety and well-being of anyone and to protect the property on CERN's premises. It lays down the procedures to be observed concerning the construction, alteration and use of buildings or installations, the safety standards for furniture and contents of buildings and the procedure applicable to the fire permit for work with "hot" tools. It gives information on fire-detection and extinguishing appliances and provides essential information in the event of a fire.



    Amendment to Safety Code E: Fire protection

    This amendment entered into force on 6 December 2022 and can be consulted here. It does not apply to CERN buildings open to the public, for which article 6.2.3 of Safety Code E continues to apply.

Safety Guidelines

  • SG FS-0-0-1

    Office buildings fire protection

    Safety Guideline under revision. For any questions please contact the HSE Unit: safety-rules.secretariat@cern.ch.

  • SG FS-0-0-2

    Smoke extraction systems

    To provide guidance for compliance with Fire Safety requirements for smoke extraction systems installed in surface buildings located in French territory.

  • SG-FS-2-1-1

    Fire Safety and Radiation Resistance requirements for Cables

    This Safety Guideline provides guidance as to the implementation of Safety Rule
    SSI-FS-2-1 “Fire Safety and Radiation Resistance Requirements for Cables” (hereafter “SSI-FS-2-1”) in particular with regard to the certification and selection of Cable materials.

Safety Forms (SF)

Safety procedures

  • Evacuation procedure and principles for CERN sites on French territory

    In some cases the regulatory framework of a certain domain can be exhaustive and challenging to implement. This document provides further interpretation on CERN safety requirements, related to evacuation procedure and principles on the French territory of the CERN site, as well as recommendations on best practices to be used on CERN sites.