Horizontal Cold Source: Fluid Dynamics Tests on the Moderator Model in Water and Air Current.

摘要

In addition to the vertical cold source, the high flux reactor is to have another cold source with a deuterium moderator level of 5 liters. At temperature levels of 25 K it produces neutrons in an energy range of < 5 MeV (velocities (approx) 600 m/s, wave lengths 6(angstrom)) for a variety of experiments. The position of the source must of necessity be horizontal. Inside it a quantity of heat of approximately 3 kW is released, a third of which comes from the moderator itself and two-thirds of which from the enclosure wall. It causes evaporation of the moderator fluid. The D(sub 2) vapor released in this way ((approx) 10 g/s) is evacuated from the moderator cell and transported to a helium-cooled condenser, then returned to the source. The condenser is located approximately 4 m above the moderating cell. The D(sub 2) circuit will operate according to the principle of a thermosiphon, which means that the fluid density differences are used to circulate the deuterium. 9 refs., 11 figs.