KINE—A One-Dimensional Dynamics Program for Pressurized Water Reactors with Partial Boiling in the Core

A short description of the reactor dynamics program KINE is given. The KINE code is a one-dimensional code solving the time-dependent neutron diffusion equations in a two-group representation, taking into account six groups of delayed neutron precursors, one heating channel composed of fuel, canning, and a coolant region in which boiling may occur. Special attention is given to radial averaging of coolant density and fuel temperature in a core in which partial boiling can exist. The method of solution is a modified backward extrapolation procedure. Stationary starting conditions are achieved by adjustment of control rod position or liquid poison concentration.