Vapor explosions

A vapor explosion results from the rapid and intense heat transfer that may follow contact between a hot liquid and a cold, more volatile one. Because it can happen during severe-accident sequences of a nuclear power plan, th at is, when a large part of the core is molten, vapor explosions have been widely studied. The different sequences of a vapor explosion are presented, including premixing, triggering, propagation, and expansion. Typical exper imental results are also analyzed to understand the involved physics. Then the different physics involved in the sequences are addressed, as well as t he present experimental program.