Aging Evaluation and Life Time Extension of Nuclear Reactor Pressure Vessel Based on Micromechanics Using Ultra Large-Scale Particle System

基于超大规模粒子系统微力学的核反应堆压力容器老化评估和寿命延长

• 批准号: 05452387
• 负责人: YAGAWA Genki
• 金额: $ 4.67万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452387/
• 关键词: Micromechanics; Nuclear Reactor Pressure Vessel; Aging Evaluation; Molecular Dynamics; Material Database; Radiation Effect

1) Parallel molecular dynamics computations for tackling the large scale problems were carried out. The parallelization was realized by the message passing library PVM based on the concept of spatial decomposition. The cluster computing using 4 workstations attained the parallel efficiency of 90%. It was found out that using Cray T3D,1 million atom problem can be computed.2) Micro defects in the model alloy exposed to the ion radiation were observed by the low-speed positron beam. Micro-structure changes related to the hardening were investigated. Molecular dynamics computations by the MOLDY-CASK,which employs the EAM potential, were performed.3) To construct the fundamental data for the molecular dynamics computations, the atomic potential library and its work bench were designed. Those information is scheduled to load onto the WWW server. Atom cluster computations based on the TBA approximation were carried out.

1）用于解决大规模问题的平行分子动力学计算。通过空间分解的概念传递库PVM的消息通过库来实现并行化。使用4个工作站的集群计算达到了90％的平行效率。发现使用Cray T3D，可以计算100万个原子问题。2）模型合金中暴露于离子辐射的微缺陷通过低速正电子束观察到。研究了与硬化有关的微结构变化。通过使用EAM电位的发霉掩膜计算分子动力学计算。3）为了构建分子动力学计算的基本数据，设计了原子电位库及其工作台。这些信息计划加载到www服务器上。进行了基于TBA近似的原子簇计算。

项目成果

H.OKUDA,T.MATSUNAGA and G.YAGAWA: "On Evaluation of Constitutive Properties of Damaged Materials by Parallel Molecular Dynamics Method" Symposium on Inelasticity and Damage in Solids Subject to Microstructural Change. (to be presented). (1996)

H.OKUDA、T.MATSUNAGA 和 G.YAGAWA：“通过平行分子动力学方法评估受损材料的本构特性”关于受微观结构变化影响的固体的非弹性和损伤研讨会。

K.Morishita, H.L.Heinisch, S.Ishino, N.Sekimura: "The Correlation of Defect Distribution in Collisional Phase with Measured Cascade Collapse Probability" Nuclear Instruments and Methods in Physics Research. B 102. 67-71 (1995)

K.Morishita、H.L.Heinisch、S.Ishino、N.Sekimura：“碰撞阶段缺陷分布与测量的级联崩溃概率的相关性”物理研究中的核仪器和方法。

N.Sekimura,Y.Kanzaki,S.R.Okada,T.Masuda,S.Ishino: "Cascade Damage Formation in Gold Under Self-ion Irradiation" Journal of Nuclear Materials. 212-215. 160-163 (1994)

N.Sekimura、Y.Kanzaki、S.R.Okada、T.Masuda、S.Ishino：“自离子辐照下金中的级联损伤形成”核材料杂志。

S.Iwata: "A Concept of a “Virtual Production Line" Produced by Integrating Databases and Models of Materials" MRS Bulletin. 29-34 (1993)

S.Iwata：“通过集成数据库和材料模型产生的“虚拟生产线”的概念”MRS 公告 29-34 (1993)。

K.Morishita,H.L.Heinisch,S.Ishino,N.Sekimura: "The Correlation of Defect Distribution in Collisional Phase with Measured Cascade Collapse Probability" Nuclear Instruments and Methods in Physics Research. B102. 67-71 (1995)

K.Morishita，H.L.Heinisch，S.Ishino，N.Sekimura：“碰撞阶段缺陷分布与测量的级联崩溃概率的相关性”物理研究中的核仪器和方法。