Fundamental study of fuel debris treatment by the use of mechanochemical method

机械化学法处理燃料碎片的基础研究

• 批准号: 24656564
• 负责人: SATO Nobuaki
• 金额: $ 2.5万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-24656564/
• 关键词: 燃料デブリ; ウラン酸化物; ジルコニウム酸化物; メカノケミカル処理; 二硫化炭素; 選択硫化; 核燃料; 硫化処理; 原子炉事故; メカノケミカル

In nuclear reactor accident at Fukushima NPP, the reactor core was damaged by the severe conditions such as very high temperature and sea water injection, forming a huge amount of nuclear fuel waste so called debris fuel. Since UO2 fuel pellets are packed in the zircaloy cladding, the fuel debris consists of the mixture of nuclear fuel and structural materials. In this paper, sulfuization behavior of uranium oxides, zirconium oxide and metal as fuel and structural materials was studied by using carbon disulfide for the sulfurization treatment of fuel debris components. No reaction was observed for Uranium oxides in the presence of CS2 at T<773 K, while metal components, such as zirconium metal shows sulfurization at lower temperature. When the mixture of simulated fuel debris was mechanochemically treated, the interaction of zirconium with UO2 seems to occur forming the UO2-ZrO2 solid solution.

在Fukushima NPP的核反应堆事故中，反应堆芯受到严重的条件（例如非常高温和海水喷射）的破坏，形成了大量所谓的碎屑燃料的核燃料废料。由于UO2燃料颗粒被包装在锆层中，因此燃料碎片由核燃料和结构材料的混合物组成。在本文中，通过使用二硫化碳对燃料碎片组件的硫化处理来研究铀氧化物，氧化锆和金属作为燃料和结构材料的硫化行为。在t <773 K处的CS2存在下，未观察到氧化铀的反应，而金属金属等金属成分在较低温度下显示出硫化。 当对模拟燃料碎屑的混合物进行机械化处理时，锆与UO2的相互作用似乎形成UO2-ZRO2固体溶液。

项目成果

Apprication of sulfide process to fuel debris treatment

硫化工艺在燃料残渣处理中的应用

• DOI: 10.1016/j.egypro.2013.07.196
• 发表时间: 2013
• 期刊: Energy Procedia
• 作者: N. Sato;A. Kirishima
• 通讯作者: A. Kirishima

Sulfurization behavior of uranium and zirconium oxides with CS2

铀和锆的氧化物与 CS2 的硫化行为

• 发表时间: 2013
• 作者: Y. Fukuda;N. SAato;A. Kirishima,
• 通讯作者: A. Kirishima,

Phase Relations of uranium and zirconium oxides at high temperature for fuel debris treatment

用于燃料碎片处理的高温铀和锆氧化物的相关系

• 发表时间: 2013
• 作者: N. Sato;Y. Fukuda;A. Kirishima;T. Sasaki
• 通讯作者: T. Sasaki