纯钚在辐照条件下相稳定性的热力学研究
TL273; Pu(钚)是一种十分重要的核工业原料,随温度变化会有不同的结构,并且辐照对其有着重要的影响.为了探究辐照强度、辐照时间对钚的相变化的影响,本研究在纯Pu的吉布斯(Gibbs)自由能计算基础上,通过考虑辐照条件下空位产生的过剩自由能,建立了纯Pu在辐照条件下的热力学模型.计算不同辐照条件下的温度-吉布斯自由能函数,得到了不同辐照强度下纯Pu的相图,分析不同辐照强度、辐照时间对其6个同素异构体相稳定性的影响.研究结果表明:辐照对较低温度下纯Pu的相稳定性影响较大,接近室温时出现了γ-Pu的相区,其稳定存在的温度范围会随着辐照的强度增强、辐照时间加长而扩大,而且辐照使α-Pu趋于稳定....
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| Published in | 核技术 Vol. 41; no. 6; pp. 13 - 21 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
厦门大学材料学院 厦门 361005
10.06.2018
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| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-3219 |
| DOI | 10.11889/j.0253-3219.2018.hjs.41.060203 |
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| Abstract | TL273; Pu(钚)是一种十分重要的核工业原料,随温度变化会有不同的结构,并且辐照对其有着重要的影响.为了探究辐照强度、辐照时间对钚的相变化的影响,本研究在纯Pu的吉布斯(Gibbs)自由能计算基础上,通过考虑辐照条件下空位产生的过剩自由能,建立了纯Pu在辐照条件下的热力学模型.计算不同辐照条件下的温度-吉布斯自由能函数,得到了不同辐照强度下纯Pu的相图,分析不同辐照强度、辐照时间对其6个同素异构体相稳定性的影响.研究结果表明:辐照对较低温度下纯Pu的相稳定性影响较大,接近室温时出现了γ-Pu的相区,其稳定存在的温度范围会随着辐照的强度增强、辐照时间加长而扩大,而且辐照使α-Pu趋于稳定.本研究所建立的辐照条件下的纯Pu的相图为Pu基核燃料的设计提供重要的基础理论指导. |
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| AbstractList | TL273; Pu(钚)是一种十分重要的核工业原料,随温度变化会有不同的结构,并且辐照对其有着重要的影响.为了探究辐照强度、辐照时间对钚的相变化的影响,本研究在纯Pu的吉布斯(Gibbs)自由能计算基础上,通过考虑辐照条件下空位产生的过剩自由能,建立了纯Pu在辐照条件下的热力学模型.计算不同辐照条件下的温度-吉布斯自由能函数,得到了不同辐照强度下纯Pu的相图,分析不同辐照强度、辐照时间对其6个同素异构体相稳定性的影响.研究结果表明:辐照对较低温度下纯Pu的相稳定性影响较大,接近室温时出现了γ-Pu的相区,其稳定存在的温度范围会随着辐照的强度增强、辐照时间加长而扩大,而且辐照使α-Pu趋于稳定.本研究所建立的辐照条件下的纯Pu的相图为Pu基核燃料的设计提供重要的基础理论指导. |
| Abstract_FL | [Background] Pu is an important material for nuclear industry, its structure is sensitive to temperature, and irradiation has an important impact on it. [Purpose] In order to explore the thermodynamic effects of irradiation on plutonium, the phase diagram of pure Pu under the irradiation established in this study provides important theoretical guidance for the design of Pu-based nuclear fuels. [Methods] Based on Gibbs free energy of pure Pu, the thermodynamic model of Pu under irradiation was established by considering the excess free energy of vacancies under irradiation conditions. [Results] The Gibbs free energy function under different irradiation was calculated, and the phase diagrams of pure Pu under different irradiation intensities were obtained. The effects of different irradiation conditions and irradiation time on the stability of six allotropic phases were analyzed. [Conclusion] The results indicated that irradiation has great influence on the phase stability of plutonium at lower temperature and the stable phase region of γ-Pu appears near room temperature. Its stable temperature range increased with the increase of the intensity of irradiation and time. |
| Author | 刘兴军 王翠萍 唐巧巧 江政 卢勇 冯翔 |
| AuthorAffiliation | 厦门大学材料学院 厦门 361005 |
| AuthorAffiliation_xml | – name: 厦门大学材料学院 厦门 361005 |
| Author_FL | FENG Xiang JIANG Zheng WANG Cuiping LU Yong LIU Xingjun TANG Qiaoqiao |
| Author_FL_xml | – sequence: 1 fullname: LU Yong – sequence: 2 fullname: TANG Qiaoqiao – sequence: 3 fullname: JIANG Zheng – sequence: 4 fullname: FENG Xiang – sequence: 5 fullname: WANG Cuiping – sequence: 6 fullname: LIU Xingjun |
| Author_xml | – sequence: 1 fullname: 卢勇 – sequence: 2 fullname: 唐巧巧 – sequence: 3 fullname: 江政 – sequence: 4 fullname: 冯翔 – sequence: 5 fullname: 王翠萍 – sequence: 6 fullname: 刘兴军 |
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| DocumentTitle_FL | Thermodynamic study on phase stability of plutonium under irradiation |
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| Keywords | Thermodynamics 相稳定性 纯钚 辐照 Irradiation 热力学 Phase stability Plutonium |
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| Title | 纯钚在辐照条件下相稳定性的热力学研究 |
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