Advanced CANDU reactors axial xenon oscillation controllability validation

摘要

Advanced CANDU reactor fuel channel assembly MCNP model with top, bottom, and four lattice sides reflecting boundaries is used to generate a conservative flat axial neutron flux distribution for the Xe-135 oscillation controllability analyses. Burnup-dependent neutron Fission Tally and Xe-135 axial profiles are calculated using the Monte Carlo burnup script MCOS. The controllability of the Xe-135 oscillations is validated by the MCOS-calculated xenon reactivity worth swings with respect to the mean. The validated upper bound of the xenon reactivity swing band of 3 mk is well within the zone controller reactivity bank of +/- 7 mk. (C) 2016 Elsevier Ltd. All rights reserved.