Modeling of Dynamic Operation Modes of IVG.1M Reactor

This paper presents the results of a calculation code approach providing solution to point kinetics problem for IVG.1M research reactor National Nuclear Center Republic Kazakhstan and allowing simulation dynamic processes going on during start-ups, including changes in thermal state all its elements, regulator displacement, accumulation absorbers fuel, beryllium reflector. A mathematical description model is presented, which provides neutron parameters, taking into account dependence reactivity effects temperature, isotopic composition materials, expansion core structural elements. An array data values was formed added by separate elements when changing their other as well an with parameters heat exchange coolant-based These are used process solving directly replace formal eliminating need calculate these at each step. Preliminary calculations form applied temperature were performed using precision model. The validated critical state. ANSYS Fluent software that describes fuel element detail. Validation developed based two start-ups applicability analysis transient emergency modes operation evaluation safe limits confirmed.