Highly dispersed nuclear fuel using spherical powder of uranium alloy rapidly solidified by spraying method as a dispersing material and its manufacturing method

摘要

The present invention relates to a high-density dispersed fuel using a spherical powder of uranium alloy rapidly solidified by a spraying method and a method of producing the same, and its object is to produce a fine spherical fuel powder directly from an alloy melt by atomization rapid solidification,$-U$Aluminum that reduces the volume expansion of high-temperature reaction due to reduction of interfacial area and thermal conductivity in heat flow direction, reduces pore, improves purity, improves purity, formability, And a method of manufacturing the same.;In the present invention, uranium and a metal raw material are weighed and charged into a heat-resistant crucible having a nozzle attached thereto. The heat-resistant crucible is installed in a spraying apparatus, and then the inside of the chamber of the atomizing apparatus provided with the heat-^-3torr or higher, and the uranium and the metal raw material charged into the heat-resistant crucible are dissolved by using a high-frequency current generator. While supplying the dissolved alloy capacity, a centrifugal force or a high-pressure gas such as a rotating disk or an electrode is used In addition to producing a droplet, fine nuclear fuel particles are rapidly solidified in an inert atmosphere such as argon or helium cooling gas (10⁴C / sec or more) and a method of manufacturing the spherical powder dispersed fuel.