Accelerator driven subcritical system as a future neutron source in Kyoto University Research Reactor Institute (KURRI) - Basic study on neutron multiplication in the accelerator driven subcritical reactor

A basic study on the nuclear characteristics in the accelerator driven subc ritical reactor (ADSR) was performed through a series of neutronics calcula tions in view of a future neutron source in Kyoto University Research React or Institute (KURRI) for the joint use program among researchers of Japanes e universities. In this series of calculations, it was assumed that three k inds of monoenergetic neutrons were isotropically generated at the center o f spherical and homogeneous cores with different moderator-to-fuel volume r atios in order to examine the spectrum mismatching effect between injected neutrons and fission neutrons born in the subcritical core. The results of calculations clearly showed the spectrum mismatching effect on the neutron multiplication in the ADSR. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.