Increase of the Subthermal Neutron Flux by Using a Cold Neutron Source at the FRG-1. Final Report

摘要

The increase of the subthermal neutron flux (wavelength range 4-6 A) by a cold neutron source (CNS) at a radial beam tube of the FRG-1 reactor is investigated in combination with different reflectors (H sub 2 O, C, Be, D sub 2 O). Advantage factors on the basis of the directed neutron flux, resulting from the use of the CNS, are calculated for various configurations. In addition, the influence of different scattering models (gas, Koppel/Young) for the CNS, group structure, and structural materials are described. Finally, the CNS assembly which is going to be installed at the FRG-1 is treated in detail. For the calculations the transport code NEUTRA and the spectral code GGC-4 are used. With 23 figs., 6 tabs. (ERA citation 11:053962)