Warning the population
In a nuclear emergency, the population is alerted by an alarm signal triggered by the Emergency Call Centre (112).
To avoid confusion with the 'fire alarm', which is a continuous tone lasting three minutes, the 'nuclear alarm' is made up of three types of signals:
the standby signal
Which is triggered when radioactive contamination is possible in one or several areas, but not yet imminent. The signal is a warbling tone lasting one minute.
the nuclear alert signal
Which is triggered when radioactive releases are imminent in one or several areas. The signal is a warbling tone lasting one minute, interrupted by two breaks of 12 seconds.
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