By way of precaution, the operators of nuclear installations have the following tasks: ENSI has the following planning and preparation tasks:

• Deployment of its own stand-by emergency service and provision of its own internal emergency response organisation.
• Operation of a measuring network for automatic dose rate monitoring in the vicinity of the nuclear power plants (MADUK).
• Advising and supporting the cantons in the planning and preparation of their tasks.
• Supervision of the actions to be taken by the operators of the nuclear installations; in particular, it reviews the readiness of the emergency response organisations of the nuclear installations by conducting emergency exercises.
• Regulation of the requirements for the determination of the source term in a guideline.
• Regulation of the requirements for the performance of emergency exercises in a guideline, in cooperation with the emergency preparedness partners.
• Regulation of the tasks of nuclear installation operators in the area of emergency preparedness (in German).
• Collection of the necessary spatial data to define the emergency preparedness zones.