The defence in depth concept is a central tenet of the safety of nuclear power plants.
The corresponding underlying principles were applied right from the start in the construction of the first nuclear power plants and have been continuously developed on the basis of international operating experience.
With its pipelines, shut-off valves and other components, the cooling circuit, together with the reactor pressure vessel, is the second barrier for trapping radioactive substances.
The reactor pressure vessel, together with the water’s cooling circuit, is the second barrier for trapping radioactive substances.
The fuel pellets are filled into metal tubes. Together with the nuclear fuel matrix, the cladding tubes are the first barrier for trapping radioactive substances in nuclear power plants.
