Sevostian Bechta

Sevostian Bechta is a Professor in the Department of Nuclear Science & Engineering at KTH Royal Institute of Technology. His research focuses on severe accident management, corium behavior, and thermal-hydraulic phenomena in nuclear reactors. He has contributed to international projects like SAFEST, investigating corium interactions and in-vessel retention strategies.

Key roles include examiner and course leader for nuclear safety courses such as Nuclear Safety (SH2612) and Nuclear Power Safety Engineering Project (FSH3001). His work spans experimental and computational studies of melt behavior, steam explosions, and debris bed coolability. Collaborations include OECD/ROSAU and QUENCH-20 experiments, with publications in journals like Annals of Nuclear Energy and Nuclear Engineering and Design.

Research highlights include developing numerical methods (MPS, MELCOR coupling) for simulating severe accident progression and validating safety guidelines. His team explores material interactions, oxidation effects, and ex-vessel core catcher designs.