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工大环保讲座(五十)—中国广核集团有限公司贺鹤鸣博士学术报告

2017-05-16 16:26:36人浏览

报告题目:Permanent Disposal of Spent Nuclear Fuel---- Experimental Assessment of the UO2Dissolution Rates over 104years

时间:2017年5月22日下午2:00

地点:大学城广东工业大学工学三号馆209

报告人:中国广核集团有限公司贺鹤鸣博士

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贺鹤鸣,男,博士、教授、博士导师。核燃料首席专家,十一批“千人计划”(创新A类)国家特聘专家,第六批广东省珠江领军人才。曾任职于最富盛名的美国国家实验室、法国原子能委员会(CEA:马库研究中心)等国立研究机构以及石油化工科学技术研究院等工业研发单位。在研发提高裂变材料利用效率的MOX核燃料、以及环境友好绿色石化工艺和催化材料等方面均取得大规模工程化应用的成果。

现作为负责人承担国家重大专项课题旨在为我国现有大型商用压水堆核电站,研发自主化的、具有抵抗严重核事故能力的、与世界同步的高性能抗事故核燃料及相应的先进制造技术和关键设备。

此外在乏燃料的永久处置环境安全研究方面,发展出了众多独创性的方法和理论。首次实现对数千年后,(假如)乏燃料容器发生破坏的情况下,UO2燃料的腐蚀速度和放射核素的释放速率的实验预测。对建立乏燃料在永久处置条件下的安全评估理论模型做出了独有的贡献。

Abstract

Nuclear power generation offers a reliable, low-impact and large-scale alternative to fossil fuels.A key, nearly unique, characteristic of nuclear energy is that during the operation of the reactors, part of fissionable isotope (235U) is burned via fission reactions and at the same time produced radiotoxic fission products. Moreover, higher actinides, some of their radiotoxicity can last over 105years, are formed in the fuel matrix via neutron capture by the fertile isotopes.The Fukushima nuclear crisisadds to the urgency needed in dealing with radioactive spent fuel.

All of the spent fuel in USA, Canada, Finland and Sweden have currently opted a one-through fuel cycle, in which the spent fuels are sealed in a corrosion-resistant metal container and buried in a stable deep geologic repository. The prospects for containment are good, though;it is judicious to investigate the consequences, if the integrity of the container finally breaks down. Under permanent disposal conditions,the true challenge is to predict the corrosion and the release rate of radionuclides, when the fuel exposed to ground water possibly for thousands of years. Here,I will demonstrate for the first time for the development of unique methodologies to experimentally determine the most probable dissolution rate of uranium dioxide after a time scale of104years.