(GRS-42) A Nonlinear 3D Real-Time Model For Simulation Of BWR Nuclear Power Plants

A nonlinear transient model for BWR nuclear power plants which consist of a 3D-core (subdivided into a number of superboxes,and with parallel flow and subcooled boiling), a top plenum, steam removal and feed water systems and main coolant recirculation pumps is given. The model describes the local core and global plant transient situation as dependent on both the inherent core dynamics and external control actions, i.e., disturbances such as motions of control rod banks, changes of mass flow rates of coolant, feed water and steam outlet. The case of a pressure- controlled reactor operation is also considered.