MAS 2012 Proceeding

Investigating spatial nuclear power effects using 3D real-time model

Authors:   Janos Sebestyen Janosy


Fuel assemblies were used in our nuclear power plant initially for 3 years, now for 4 years and soon they will stay in the core for 5 years. Each year only 1/3rd, 1/4th later 1/5th of them is replaced; therefore the change of the fuel type is a lengthy process, with mixed cores used in between. The full-scope simulator is upgraded to simulate the exact behavior of these mixed cores. The RETINA is a 3D thermo-hydraulic code (Hazi, 2001), the KIKO3D is a 3D neutron-kinetics code (Kereszturi, 2003), are operating parallel in real-time. Models were presented on WAMS2010 workshop in Buzios, Brasil (Janosy, 2010). Verification and validation of these models are extremely difficult because the lack of experimental data. Since the Chernobyl accident no experiments with nuclear power are encouraged. The paper describes the experience gained during the V&V process ? driving these coupled 3D models up to extreme conditions.

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