Determination of melting point of mixed-oxide fuel irradiated in fast breeder reactor.

概要

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For UO2 and (U, Pu)O2, many workers(1) have determined melting points by use of a filament in situ measurement. However, it is indicated that temperature measurement for this technique may be influenced by the high vapor pressure of the specimen at high temperature and the oxygen-to-metal ratio may also change during heating of the filament(2)(4). Thereafter, a thermal arrest technique has been newly developed(2) using specimen enclosed in a sealed tungsten capsule to maintain the stoichiometric composition at the melting.
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