Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) (방사성폐기물학회지)

Korean Radioactive Waste Society (한국방사성폐기물학회)
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Estimation of Effective Dose to Residents Due to Hypothetical Accidents During Dismantling of Steam Generator

  • Received : 2022.09.29
  • Accepted : 2022.11.30
  • Published : 2023.06.30
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Abstract

The potential impact of hypothetical accidents that occur during the immediate and deferred dismantling of the Kori Unit 1 steam generator has been comprehensively evaluated. The evaluation includes determining the inventory of radionuclides in the Steam Generator based on surface contamination measurements, assuming a rate of release for each accident scenario, and applying external and internal exposure dose coefficients to assess the effects of radionuclides on human health. The evaluation also includes calculating the atmospheric dispersion factor using the PAVAN code and analyzing three years of meteorological data from Kori NPP to determine the degree of diffusion of radionuclides in the atmosphere. Overall, the effective dose for residents living in the Exclusion Area Boundary (EAB) of Kori NPP is predicted, an it is found that the maximum level of the dose is 0.034% compared to the annual dose limit of 1 mSv for the general public. This implies that the potential impact of hypothetical accidents on human health discussed above is within acceptable limits.

Keywords

Acknowledgement

This research was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP Project No. 20204010600130) and the Ministry of Trade, Industry of Energy (MOTIE) of the Republic of Korea.

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