MELCOR-To-MELCOR Coupling Method in Severe Accident Analysis Involving Core and Spent Fuel Pool

A lot of effort has been spent to prevent the occurrence SA in nuclear plant and develop Severe Accidents (SA) Management mitigate consequences a SA. Those are mainly related limit release fission product environment. The core vessel is not only source products as Spent Fuel Pool (SFP) hosting fuel removed by is, some NPP, inside containment conditions can also occur. This especially important reactors having proximity between RPV SFP such VVER-1200. close implies that any occurring potentially affects vice-versa. potential combination might cause unexpected evolution progression whom safety systems able contain. MELCOR code widely used, flexible powerful but it incapable (due uniqueness COR package use same input) reproduce situation which both SFP, containment, going experience severe accident scenario. current study presents MELCOR-to-MELCOR coupling method simulate simultaneously scenarios with both, sources capable H2 generation, damage FP VVER-1200 NPP. performed running two simulations parallel data exchange supervised managed dedicated Python supervising script developed at NINE.