The large-scale experiments CometPC-H4 and -H5 investigate cooling of simulated corium melts by flooding the melt from the bottom through layers of porous, water filled concrete. Both experiments use 800 kg of oxidic and metallic melts, initial temperature from 1800 to 1900 C, with simulation of nuclear decay heat by inductive heating with 300 KW t...
Germany
Germany
The MEGAPIE target is being developed as liquid metal target for the Spallation Neutro Source SINQ at the Paul Scherrer Institute at Villigen, Switzerland. The present report analyses the hypothetical accident 'failure of the beam windows of target and safety hull.' During such an accident, the liquid potassium-bismuth alloy from the target would c...
Germany
The DISCO-H Test Facility at Forschungszentrum Karlsruhe was set up to perform scaled experiments that simulate melt ejection scenarios under low system pressure in Severe Accidents in Pressurized Water Reactors (PWR). These experiments are designed to investigate the fluid-dynamic, thermal and chemical processes during melt ejection out of a breac...
Standard turbomolecular pumps show typically one annular active intake area on the high vacuum flange side (single-flow pumps). The central circular part of the inlet of the compressor turbine is blind for pumping. The new design proposes a central opening of a turbomolecular pump all along the axis. This central bore can be used e.g. for mounting ...
Germany
The transition temperature to superconductivity, T_c, of the high-temperature superconductor R_1_-_yCa_yBa_2Cu_3O_x (R=Y, Nd) can easily be changed by variation of oxygen or calcium content. Exposing the sample to hydrostatic pressure leads to additional T_c changes depending on the oxygen and calcium content. In this work possible origins of the T...
Germany
