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Radiation damage to Ni-based alloys in Wolsong CANDU reactor environments

  • Kwon, Junhyun (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Jin, Hyung-Ha (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Lee, Gyeong-Geun (Nuclear Materials Research Division, Korea Atomic Energy Research Institute) ;
  • Park, Dong-Hwan (Reactor Core and Fuel Analysis Group, Korea Hydro & Nuclear Power Co. Central Research Institute)
  • Received : 2018.10.03
  • Accepted : 2018.11.27
  • Published : 2019.04.25

Abstract

Radiation damage due to neutrons has been calculated in Ni-based alloys in Wolsong CANDU reactor environments. Two damage parameters are considered: displacement damage, and transmutation gas production. We used the SPECTER and SRIM computer codes in quantifying radiation damage. In addition, damage caused by Ni two-step reactions was considered. Estimations were made for the annulus spacers in a CANDU reactor that are located axially along a fuel channel and made of Inconel X-750. The calculation results indicate that the transmutation gas production from the Ni two-step reactions is predominant as the effective full power year increases. The displacement damage due to recoil atoms produced from Ni two-step reactions accounts for over 30% out of the total displacement damage.

Keywords

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