Summary report on the DFR-Ml (287/6)/DN 5 irradiation experiment

Automatic translation: In the development of fuel elements for high-temperature reactors the transport of the heat generated in the individual fuel particles (coated particles) to the coolant is one of the main problems. With the required high power densities required, the thermal conductivity of a loose bed of fuel particles is not sufficient to prevent the fuel cores from overheating. For this reason, it is necessary to embed the fuel fuel particles into a so-called matrix whose thermal conductivity is high enough to maintain the permissible fuel temperatures. The matrix has a second important task to fulfill for safety reasons to fulfill. It forms a stable ''composite body'' with the fuel particles, which prevents the fuel particles from scattering in the reactor, especially in the case of defective fuel elements. in the reactor.