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

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

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.

Language	:	English
Journal	:	Journal of Nuclear Materials
Volume	:	400
Number	:	1
Pages	:	p.32 - 36
Publication Year/Month	:	2010/05
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Paper URL	:	https://doi.org/10.1016/j.jnucmat.2010.02.006
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Keywords	:	no keyword
Research Facility	:	AGF(照射燃料試験施設)
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Registration No. : AA20090495
JAEA Abstracts No. : 38000860
Paper Submission No. : 7498

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