Jülich irradiation experiments on spherical fuel elements fuel elements, in particular the release behavior of fission products

Automatic translation: In the following, an overview is given of the Jülich irradiation experiments on spherical fuel elements and, in particular, the problem of fission product release of gaseous and solid fission products. First, the objectives of the various experiments are explained and then the post-irradiation investigations are discussed in more detail. In order to achieve technical progress, the method of searching for the weakest part in functioning technical systems is often used Once this has been identified, an attempt is made to replace it by improving the material or the construction parts in such a way that the overall system is no longer determined by it. In the case of nuclear reactors In the case of nuclear reactors, the fuel elements are currently an area where it is essential to improve quality and safety through a wide range of experiments. In the case of helium-cooled high-temperature reactors, such as those being developed at Jülich, one important way of experimenting is to use fuel elements that are expected to be safe, which are expected to represent an improvement on the previous ones, are irradiated in research reactors. These research reactors are usually light or heavy water moderated.