Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−x
Oxygen potential measurement was conducted at 1273 K, 1473 K, 1573 K, and 1623 K for (U0.55Pu0.3Am0.15)O2−x using a thermogravimeter and oxygen sensors. Adding 15% Am instead of U increased the oxygen potential of (U0.7Pu0.3)O2−x by 100 – 150 kJ/mol. The measured oxygen potentials were analyzed by t...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Nuclear Materials and Energy |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179125000481 |
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| author | Keisuke Yokoyama Masashi Watanabe Akane Usui Takayuki Seki Takashi Onishi Masato Kato |
| author_facet | Keisuke Yokoyama Masashi Watanabe Akane Usui Takayuki Seki Takashi Onishi Masato Kato |
| author_sort | Keisuke Yokoyama |
| collection | DOAJ |
| description | Oxygen potential measurement was conducted at 1273 K, 1473 K, 1573 K, and 1623 K for (U0.55Pu0.3Am0.15)O2−x using a thermogravimeter and oxygen sensors. Adding 15% Am instead of U increased the oxygen potential of (U0.7Pu0.3)O2−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 (U0.55Pu0.3Am0.15)O2−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)O2.00 in the stoichiometric composition. |
| format | Article |
| id | doaj-art-d8d461e810b7498a857777ea39a5ec1d |
| institution | OA Journals |
| issn | 2352-1791 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-d8d461e810b7498a857777ea39a5ec1d2025-08-20T02:04:33ZengElsevierNuclear Materials and Energy2352-17912025-03-014210190810.1016/j.nme.2025.101908Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−xKeisuke Yokoyama0Masashi Watanabe1Akane Usui2Takayuki Seki3Takashi Onishi4Masato Kato5Fuels and Materials Department, Japan Atomic Energy Agency, 4002 Narita-cho, Oarai-machi, Ibaraki 311-1393, Japan; Corresponding author.Fuels and Materials Department, Japan Atomic Energy Agency, 4002 Narita-cho, Oarai-machi, Ibaraki 311-1393, JapanFuels and Materials Department, Japan Atomic Energy Agency, 4002 Narita-cho, Oarai-machi, Ibaraki 311-1393, JapanInspection Development Company Ltd., 3129-37 Muramatsu, Tokai-mura, Ibaraki 319-1112, JapanFuels and Materials Department, Japan Atomic Energy Agency, 4002 Narita-cho, Oarai-machi, Ibaraki 311-1393, JapanInspection Development Company Ltd., 3129-37 Muramatsu, Tokai-mura, Ibaraki 319-1112, JapanOxygen potential measurement was conducted at 1273 K, 1473 K, 1573 K, and 1623 K for (U0.55Pu0.3Am0.15)O2−x using a thermogravimeter and oxygen sensors. Adding 15% Am instead of U increased the oxygen potential of (U0.7Pu0.3)O2−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 (U0.55Pu0.3Am0.15)O2−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)O2.00 in the stoichiometric composition.http://www.sciencedirect.com/science/article/pii/S2352179125000481 |
| spellingShingle | Keisuke Yokoyama Masashi Watanabe Akane Usui Takayuki Seki Takashi Onishi Masato Kato Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−x Nuclear Materials and Energy |
| title | Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−x |
| title_full | Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−x |
| title_fullStr | Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−x |
| title_full_unstemmed | Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−x |
| title_short | Effect of Am addition on oxygen potential in (U0.55Pu0.3Am0.15)O2−x |
| title_sort | effect of am addition on oxygen potential in u0 55pu0 3am0 15 o2 x |
| url | http://www.sciencedirect.com/science/article/pii/S2352179125000481 |
| work_keys_str_mv | AT keisukeyokoyama effectofamadditiononoxygenpotentialinu055pu03am015o2x AT masashiwatanabe effectofamadditiononoxygenpotentialinu055pu03am015o2x AT akaneusui effectofamadditiononoxygenpotentialinu055pu03am015o2x AT takayukiseki effectofamadditiononoxygenpotentialinu055pu03am015o2x AT takashionishi effectofamadditiononoxygenpotentialinu055pu03am015o2x AT masatokato effectofamadditiononoxygenpotentialinu055pu03am015o2x |