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DPA damage analysis for 14-MeV neutrons on PFC materials

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Abstract

The dpa (displacement per atom) damage for 14-MeV neutron in a pfc materials was simulated using MCNPX/SPECTER code. The dpa values in the main components of the structural material SS316L, Fe, Cr and Ni, were calculated to analyze the effect of nuclear damage. According to the neutron wall load for ITER design base, a neutron flux of 3.5 × 1013 neutrons/cm2·sec was applied. The simulated dpa values were found to be as 3.0 dpa/fpy for Fe, 2.9 dpa/fpy for Cr and 3.1 dpa/fpy for Ni. For practical experiments, the simulated dpa values due to the irradiation damage of 17-MeV protons were found to be as 0.67 dpa at the peak and 0.05 at the surface for SS316L using by SRIM code at the same fluence. For the 17-MeV proton irradiation, the Bragg peak appears at a 0.64-mm depth. Also, SS316L specimens irradiated by a 17-MeV proton beam with a fluence of 1016 protons/cm2 were analyzed by using transmission electron microscopy.

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Authors and Affiliations

  1. Department of Physics, University of Ulsan, Ulsan, 680-749, Korea

    Dong-woo Kim, Bo-young Lee & Seung-kook Ko

  2. Department of Applied Physics, DanKook University, Yongin, 448-701, Korea

    Hee-soo Kim & Seung-jung Noh

Authors
  1. Dong-woo Kim
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  2. Bo-young Lee
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  3. Seung-kook Ko
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  4. Hee-soo Kim
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  5. Seung-jung Noh
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Correspondence to Seung-kook Ko.

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Kim, Dw., Lee, By., Ko, Sk. et al. DPA damage analysis for 14-MeV neutrons on PFC materials. Journal of the Korean Physical Society 66, 1841–1844 (2015). https://doi.org/10.3938/jkps.66.1841

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  • DOI: https://doi.org/10.3938/jkps.66.1841

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