In the last 10 years, severe accident research programmes have had to address the possibility that an accident may exceed the design basis conditions. This paper describes the current state of the art in safety analysis of the main phenomena involved in a LWR accident. As far as source term is concerned, three main topics arise: core degradation, release and transport of aerosols/fission products, and the chemistry of the fission products. Another area of study concerns threats to the confinement from direct containment heating, vapour explosions, the molten core or hydrogen generation. The objectives of the international Phebus programme are also outlined.
Bibliographic Reference: Paper presented: Training Seminar on Severe Accidents and Accident Management in Light Water Reactors, Lyon (FR), March 23-27, 1992
Availability: Available from (1) as Paper EN 36706 ORA
Record Number: 199210458 / Last updated on: 1994-12-02
Original language: en
Available languages: en