Instantaneous　Boiling　of　a　Water　Droplet　on　Molten　Salts and　Vapor　Explosion Characteristics

Abstract

In　order　to　evaluate　the　vapor　explosion　induced　at　the　direct　contact　of　water　with　molten　salts， a systematic experiment of measuring evaporation characteristics of a water droplet dropped on to the free　sufface　of　various　melts　is　conducted　for　a　wide　range　of　temperature　difference　between　both liquids，　The　experiments　show　that　the　droplets　evaporate　instantaneously　on　several　melts，and　the modes of instantaneous boiling，the condition and the rate of occurance of instantaneous boiling are measured.　The　results　of　present　experiment　are　compared　with　those　of　vapor　explosion　tests　carried out for same kinds of melts, It is suggesred that the evapolation characteristics of instantaneous boiling is　compatible　to　evaluate　the　characteristics　of vapor　explosion　for　molten　salt－water　system．