Current status and some problems of severe accident simulation at NPPs abroad

This paper describes the main goals and achievements of the severe accident research abroad during the last two decades, especially after the Chernobyl accident (1986). Many important safety issues have been studied during that time, while the other were identified as new or as the challenges that still remain. Here are provided some references to the progress made in severe accident research including that, which on we have taken part since 1998