A Study on boiling water Reactor stability behavior

摘要

In the framework of the Paul Scherrer Institute (PSI) transient analysis project STARS, a boiling water reactor (BWR) stability analysis methodology based on the BWR system code RAMONA3 has been developed. The time se- ries analysis based on parametric mixed autoregressive/ moving average models is conducted by a MATLAB code package using the system identification and the signal- processing toolboxes of MATLAB. A short description of the PSI methodology is presented and two aspects of the stability analysis are discussed. First, the physical mech- anism underlying the BWR power oscillations from the non- linear feedback system point of view is discussed, and second, some experiences collected by the analysis of the regional stability phenomenon are presented.