This is a prevention plan put in place by the French government for people living within 20km of a nuclear power plant. These residents are therefore the most aware of the risk they face and what to do in the event of an accident.
In the case of the Cattenom power plant, some municipalities in the south of the country are included in the SIP. Nevertheless, all residents of the country are encouraged to learn about the following preventive measures.
You can go out as soon as the warning is lifted, but don't touch your car, or any food and water that may have been contaminated.