Transient 3D Methods Validation for cycle specific BWR reload analysis at TVO

The paper describes the application of the SIMULATE-3K code to a class of fast operational BWR transients, that are typically analyzed as part of the core reload design licensing process. The models and methods of the code are presented. Validation results are shown for two recorded fast transient events in the Olkihioto-1 and -2 reactors. It is concluded that the code adequately captures the complicated interaction between physical processes in the reactor as well as the essential reactor protection and control systems, which qualifies it for applications to this class of fast transients.