Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−x

IF 2.3 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Materials and Energy Pub Date : 2025-02-20 DOI:10.1016/j.nme.2025.101908

Keisuke Yokoyama , Masashi Watanabe , Akane Usui , Takayuki Seki , Takashi Onishi , Masato Kato

引用次数: 0

Abstract

Oxygen potential measurement was conducted at 1273 K, 1473 K, 1573 K, and 1623 K for (U_0.55Pu_0.3Am_0.15)O_2−x using a thermogravimeter and oxygen sensors. Adding 15% Am instead of U increased the oxygen potential of (U_0.7Pu_0.3)O_2−x by 100 – 150 kJ/mol. The measured oxygen potentials were analyzed by the defect chemistry method. This analysis showed that the oxygen potential of (U_0.55Pu_0.3Am_0.15)O_2−x was formulated as a function of O/M ratio and temperature, and that the calculated results were consistent with the measured data. The cation valence is estimated to be (U⁴⁺_0.4U⁵⁺_0.15Pu⁴⁺_0.3Am³⁺_0.15)O_2.00 in the stoichiometric composition.

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使用热重计和氧传感器在 1273 K、1473 K、1573 K 和 1623 K 对（U0.55Pu0.3Am0.15）O2-x 进行了氧电势测量。添加 15%的 Am 而不是 U 会使（U0.7Pu0.3）O2-x 的氧电势增加 100 - 150 kJ/mol。测量到的氧电势用缺陷化学法进行了分析。该分析表明，(U0.55Pu0.3Am0.15)O2-x 的氧电势是作为 O/M 比和温度的函数制定的，计算结果与测量数据一致。据估计，在化学计量组成中，阳离子价为 (U4+0.4U5+0.15Pu4+0.3Am3+0.15)O2.00。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.