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Report No.
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Mechanism of transient boiling phenomena generated by microwave heating

Suzuki, Shota*; Kaneko, Akiko*; Abe, Yutaka*; Suzuki, Masahiro ; Segawa, Tomoomi ; Fujii, Kanichi

The influences of vessel, solution and heating properties for boiling behavior were evaluated to clear them in the electro-magnetic wave (microwave) heating of the de-nitrate conversion process of nuclear fuel cycle. Boiling and fluid behavior of solution were observed by the high speed video camera, the temperature of solution level were measured by radiation thermography, and the temperature of the vessel surface was measured by thermography. The temperature of solution level was 103.2 degree, which showed that the solution was overheated. The corrected temperature on the vessel surface measured by thermography was 105.8 degree. It is expected that the inner temperature of solution is higher than that of vessel surface. It is considered that the energy of microwave concentrates at the core of solution, and flushing is leaded by generating the uniform nucleation according to overheating.

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