One-Dimensional Calculation the Neutron And γ Flows in the Reflector and Carbon Stone Installations of the Process Heat Reactor PR 50

Automatic translation: The permissible power density in the upper core part of the PR 500 is limited, among other things, by lattice disturbances in the graphite too high a fast neutron dose. First indications for the The expected γ and neutron flux distribution in the reflector and carbon stone structures of a PR 500 with a two-zone core is provided by S. Rath-Nagel's diploma thesis at the Chair of Reactor Technology at RWTH Aachen. A modified version of the one at the chair was used for the bill existing one-dimensional diffusion program NOFRETETE used. The shielding effect that can be achieved with different materials, the expected radiation exposure and the accuracy of the calculation are discussed in this work. The following study was created as part of the collaboration between the Institute for Reactor Development at KFA Jülich GmbH and the Chair of Reactor Technology at RWTH Aachen University.