Displacement of Atoms in Fusion Neutron Irradiated Fe and W

Authors

  • Troyo Troev Bulgarian Academy of Sciences
  • Vladimir Angelov Bulgarian Academy of Sciences
  • Stela Peneva Bulgarian Academy of Sciences
  • Valentina Semkova Bulgarian Academy of Sciences

DOI:

https://doi.org/10.7546/CRABS.2025.05.03

Keywords:

damage energy, displacement per atom, primary knock-on atoms, plasma facing materials, fusion neutrons

Abstract

FLUKA code has been applied to calculate displacement per atom (DPA) distributions in irradiated Fe and W targets by 2.45 MeV and 14 MeV neutrons. The variations in DPA spectra of Fe and W as a function of target radius, depths and neutron energy are explored. It has been found that DPA depends not only on the depths but also on the size of radius of irradiated targets and neutron energy. FLUKA calculations show that DPA for 14 MeV neutrons in Fe for 1 MW/m2 will be 1.49 × 10–7 DPA/s and for full power year (FPY) will be 4.67 DPA/FPY per 1 MW/m2. DPA in W for 14 MeV neutrons for 1 MW/m2 will be 8.62 × 10–8 DPA/s and for DPA/FPY will be equal to 2.73 DPA/FPY per 1 MW/m2, respectively.

Author Biographies

Troyo Troev, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

E-mail: troev@inrne.bas.bg

Vladimir Angelov, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

E-mail: angelovv@inrne.bas.bg

Stela Peneva, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

E-mail: stela@inrne.bas.bg

Valentina Semkova, Bulgarian Academy of Sciences

Mailing Address:
Institute for Nuclear Research and Nuclear Energy
Bulgarian Academy of Sciences
72 Tsarigradsko Shosse
1784 Sofia, Bulgaria

E-mail: semkovav@inrne.bas.bg

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Published

28-05-2025

How to Cite

[1]
T. Troev, V. Angelov, S. Peneva, and V. Semkova, “Displacement of Atoms in Fusion Neutron Irradiated Fe and W”, C. R. Acad. Bulg. Sci., vol. 78, no. 5, pp. 663–669, May 2025.

Issue

Vol. 78 No. 5 (2025)

Section

Physics

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