An adiabatic model for space-dependent boiling water reactor kinetics

This and the companion paper deal with space-dependent boiling water reactor kinetics by the method of adiabatic approximation. In this paper, equations are derived for axially space-dependent BWR feedback kinetics. These equations are coupled to the neutron equations through adiabatic approximation. The reactor is divided into a number of axial regions. Assuming a trapezoidal distribution of the void and the water velocity distributions along the axis, balance equations for energy and mass are integrated to yield the region-exit quantities. With other pertinent equations, a computer code is written. Some numerical results for a sample BWR are presented in the companion paper. (author)