Device for storing fissile material

If fissile materials, e.g. nuclear reactor fuel elements are stored attention is to be paid that there is always enough distance so that no critical or supercritical mass will arise, even in case of an earthquake moving the store. It is therefore proposed to provide containers of neutron-absorbing material subdivided in such a way that the individual stored masses are separated from each other by a shielding wall. The containers for each mass are connected with each other by spacers, the distance corresponding to a minimum neutron stopping length. Stainless steel with a thickness of about 6.35 mm is mentioned as shielding material. (UWI)