Nuclear Engineering and Technology

  • 제54권7호
  • /
  • Pages.2690-2701
  • /
  • 2022
  • /
  • 1738-5733(pISSN)
  • /
  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Numerical studies on the important fission products for estimating the source term during a severe accident

  • Lee, Yoonhee (Department of Nuclear Safety Research, Korea Institute of Nuclear Safety) ;
  • Cho, Yong Jin (Department of Nuclear Safety Research, Korea Institute of Nuclear Safety) ;
  • Lim, Kukhee (Department of Nuclear Safety Research, Korea Institute of Nuclear Safety)
  • 투고 : 2021.09.13
  • 심사 : 2022.02.25
  • 발행 : 2022.07.25
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초록

In this paper, we select important fission products for the estimation of the source term during a severe accident of a PWR. The selection is based on the numerical results obtained from depletion calculations for the typical PWR fuel via the in-house code named DEGETION (Depletion, Generation, and Transmutation of Isotopes on Nuclear Application), release fractions of the fission products derived from NUREG-1465, and effective dose conversion coefficients from ICRP 119. Then, for the selected fission products, we obtain the adjoint solutions of the Bateman equations for radioactive decay in order to determine the importance of precursors producing the aforementioned fission products via radioactive decay, which would provide insights into the assumption used in MACCS 2 for a level 3 PSA analysis in which up to six precursors are considered in the calculations of radioactive decays for the fission product after release from the reactor.

키워드

과제정보

This work was supported by the Nuclear Safety Research Program through the Korea Foundation Of Nuclear Safety (KoFONS) using financial resources granted by the Nuclear Safety and Security Commission (NSSC) of the Republic of Korea (No. 2106007). The authors also would like to thank the reviewers for giving very detailed and useful reviews to strengthening the paper.

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