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Melting behavior of MgO-based inert matrix fuels containing (Pu,Am)O$$_{2-x}$$

MgOを母材とした(Pu,Am)O$$_{2-x}$$含有イナートマトリックス燃料の溶融挙動

三輪 周平  ; 佐藤 勇; 田中 康介  ; 廣沢 孝志  ; 逢坂 正彦  

Miwa, Shuhei; Sato, Isamu; Tanaka, Kosuke; Hirosawa, Takashi; Osaka, Masahiko

MgOを母材とした(Pu,Am)O$$_{2-x}$$含有イナートマトリックス燃料の溶融挙動を調べた。試料の熱処理は2173K, 2373K及び2573Kで行った。2573Kで共晶反応により試料は溶融した。温度上昇とともに(Pu,Am)O$$_{2-x}$$相,MgO相,ポアが成長した。また、熱処理を行った試料の(Pu,Am)O$$_{2-x}$$相の中にAmが多く含む相が析出した。PuO$$_{2-x}$$-MgO燃料とAmO$$_{2-x}$$-MgO燃料と比較を行うことで、(Pu,Am)O$$_{2-x}$$-MgO燃料の溶融挙動について評価を行った。

The melting behavior of MgO-based inert matrix fuels containing (Pu,Am)O$$_{2-x}$$ ((Pu,Am)O$$_{2-x}$$-MgO fuels) was experimentally investigated. Heat-treatment tests were carried out at 2173 K, 2373 K and 2573 K. The fuel melted at about 2573 K in the eutectic reaction of the Pu-Am-Mg-O system. The (Pu,Am)O$$_{2-x}$$ grains, MgO grains and pores grew with increasing temperature. In addition, Am-rich oxide phases were formed in the (Pu,Am)O$$_{2-x}$$ phase by heat-treatment at high temperatures. The melting behavior was compared with behaviors of PuO$$_{2-x}$$-MgO and AmO$$_{2-x}$$-MgO fuels.

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パーセンタイル:40.42

分野:Materials Science, Multidisciplinary

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