Multi-scale modeling of irradiation effects in spallation neutron source materials

T. Yoshiie, T. Ito, H. Iwase, Y. Kaneko, M. Kawai, I. Kishida, S. Kunieda, K. Sato, S. Shimakawa, F. Shimizu, S. Hashimoto, N. Hashimoto, T. Fukahori, Y. Watanabe, Q. Xu, S. Ishino

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Changes in mechanical property of Ni under irradiation by 3 GeV protons were estimated by multi-scale modeling. The code consisted of four parts. The first part was based on the Particle and Heavy-Ion Transport code System (PHITS) code for nuclear reactions, and modeled the interactions between high energy protons and nuclei in the target. The second part covered atomic collisions by particles without nuclear reactions. Because the energy of the particles was high, subcascade analysis was employed. The direct formation of clusters and the number of mobile defects were estimated using molecular dynamics (MD) and kinetic Monte-Carlo (kMC) methods in each subcascade. The third part considered damage structural evolutions estimated by reaction kinetic analysis. The fourth part involved the estimation of mechanical property change using three-dimensional discrete dislocation dynamics (DDD). Using the above four part code, stress-strain curves for high energy proton irradiated Ni were obtained.

Original languageEnglish
Pages (from-to)1740-1743
Number of pages4
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Issue number14
Publication statusPublished - Jul 15 2011

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation


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