Hermetic penetration of feeders and instrumentation leads

The invention has been directed at a hermetic penetration of feeders and instrumentation leads through the containment of nuclear power plants. This penetration is sealed against media and radiation also at high temperature and radiation exposures. It ensures an economical mounting and a non-destructive dismounting as well as a minimum expense of failed component exchange and has a longevity. The penetration consists of a fixed flanged pipe with a radiation protective device which has some cylinder plates with bores. The bores take up insulating tubes for guiding the bare and axially parallel staggered feeders and instrumentation leads