Safety Instructions implement, in general, existing Safety Codes. These Safety Instructions are called to be replaced by new Safety rules.

  • IS 22

    Rules for the safe use of lasers at CERN (1994)

    The radiation produced by lasers may be hazardous to the human eye and skin. It may also present fire or explosion risks. Lasers have been classified according to their exposure hazards. Conditions for use and warning labels and notices are recorded.

  • IS 23

    Criteria and Standard Test Methods for the Selection of Electric Cables and Wires with Respect to Fire Safety and Radiation Resistance (2005)

    This instruction is based on the latest standards and recommendations to ensure a very high level of safety against hazards associated with smoke, toxicity and corrosivity from burning plastics. It summarizes the required properties for the different materials and cable types and is applicable to all types of cables and wires and other insulated parts to be used in CERN installations.

  • IS 23

    Criteria and Standard Test Methods for the Selection of Electric Cables and Wires with Respect to Fire Safety and Radiation Resistance (2005)

    This instruction is based on the latest standards and recommendations to ensure a very high level of safety against hazards associated with smoke, toxicity and corrosivity from burning plastics. It summarizes the required properties for the different materials and cable types and is applicable to all types of cables and wires and other insulated parts to be used in CERN installations.

  • IS 24

    Regulations applicable to electrical installations (1990)

    Reference is made to publications on electrical installations.

  • IS 32

    Polychlorinated biphenyls (PCB) (1986)

    Rules for the safe use of PCB and for the elimination from CERN in a controlled and safe manner, to conform to the legislation of the Host-States.

  • IS 36

    Safety Rules for the Use of Static Magnetic Fields at CERN (2005)

    Studies on workers exposed to static magnetic fields have indicated various subjective symptoms and functional disturbances. This instruction recalls some of the technical hazards encountered, and informs on exposure limits and on the safety procedures for operating magnets. Following the publication of Directive 2013/35/EU of the European Parliament and of the Council of 26 June 2013, the exposure limits for occupational exposure defined in paragraphs 5 and 6 of IS36 rev. 2 shall be amended as defined below. All other provisions of IS36 Rev. 2 remain valid including the principle that exposure shall be kept “As Low as Reasonably Achievable (ALARA)”. Occupational exposure limits: Exposure limits under normal working conditions are B = 2 T and B = 8 T for localised limbs exposure, B being the magnetic flux density. Exposure below the above indicated limits does not require a specific medical authorisation or follow-up. (Memo EDMS 1466042)

  • IS 37

    Alarms and alarm systems (2003)

    The object is to define safety alarms and to establish general rules for the installation, maintenance, disabling, and layout of safety alarm systems generating level 3 alarms. The EDH version of the disabling form is now mandatory.

  • IS 4 Rev.

    Safety inspections (2006)

    Definition of responsibilities and organizational aspects concerning safety inspections, with emphasis for buildings.

  • 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 42

    Compressed gas bottles (1995)

    Safety rules for the transport, use and storing of cylinders to avoid fire or explosion hazards.

  • IS 42

    Compressed gas bottles (1995)

    Safety rules for the transport, use and storing of cylinders to avoid fire or explosion hazards.

  • IS 43

    Asbestos - Dangers and precautions (2003)

    The purpose of this safety instruction is to remind the CERN personnel of the safety instructions prohibiting the use of asbestos, of those concerning the management of asbestos in situ and those governing activities entailing a risk of exposure to asbestos.

  • 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.

  • 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.

  • IS 49

    Avoiding chemical pollution of water (2002)

    This instruction gives a definition of chemical pollution and examples of common water pollution hazard. It explains the role of the SC services in matters of the environmental protection, lists the activities and circumstances that may lead to pollution. It outlines practical measures to be obeyed to prevent pollution and instructs how to behave when pollution or leakage of polluting liquids is observed or believed. Finally, it explains legal aspects of water pollution, including INB regulations, and addresses liaisons with the Host States in matters of environmental protection.

  • IS 5

    Emergency stops (2001)

    Description of the two types of emergency stops (general and local emergency stops), the definition of the buildings or areas to be equipped, and effects due to these emergency stops on power supplies or accelerators. Exceptions and rules for safety equipment.

  • IS 5

    Emergency stops (2001)

    Description of the two types of emergency stops (general and local emergency stops), definition of the buildings or areas to be equipped, and effects due to these emergency stops on power supplies or accelerators. Exceptions and rules for safety equipment.

  • IS 51

    Operational and Information Procedures in Reponse to Accidents (2005)

    The scope of this Safety Instruction is to describe operational procedures in response to accidents, to assure coordination of interventions, both at CERN and with outside emergency services as well as the transmission of information within CERN and in case of need to the Host States Authorities and media. The adopted procedures depend on the seriousness level assigned to the event.

  • IS 7

    Individual protection (1993)

    This instruction is based on the European Directive 89/656/CEE concerning minimal safety and health requirements for the use of individual protective equipment when hazards cannot be prevented or adequately limited by collective technical protective measures. Specific requirements for Individual Protective Equipment for a given hazard can be found in the concerned Safety Rules (for example Chemical Safety rules)