This 18 hour course describes severe accident phenomenology and Chernobyl and TMI accidents.

Topics cover:

• Severe Accident Phenomenology

-Inside and outside the vessel

-Core melting and relocation

-Hydrogen performance

-Fission products release

-Reactor Vessel failure

-Containment failure modes

• TMI and Chernobyl Accidents

-Main aspects to be addressed

-“Learned Lessons”