Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Dose analysis of nearby residents and workers due to the emission accident of gaseous radioactive material at the spent resin mixture treatment facility

  • Jaehoon Byun (Department of Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST)) ;
  • Seungbin Yoon (Department of Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST)) ;
  • Hee Reyoung Kim (Department of Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST))
  • Received : 2023.05.08
  • Accepted : 2023.08.21
  • Published : 2023.12.25
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Abstract

The dose from a possible accident at a microwave-based spent resin mixture treatment facility that was to be installed and operated at the Wolsong nuclear power plant was analyzed to evaluate the radiological safety prior to its installation and operation. The dose to which workers and nearby residents are likely to be exposed was calculated based on the atmospheric dispersion and deposition factors using the XOQDOQ code. The highest atmospheric dispersion factors were 1.349E-05 s/m3 (workers) and 1.534E-06 s/m3 (residents). The highest doses due to emissions from the mock-up tank before operation were 1.91E-06 mSv (workers) and 1.78E-07 mSv (residents). Even after 3 h of operation, emissions from the mock-up tank had the greatest impact ranging from 4.63E-08 to 1.24E-06 mSv (workers) and 2.74E-10 to 1.16E-07 mSv (residents), respectively. The doses were 7.09E-09-4.55E-07 mSv and 4.18E-11-4.25E-08 mSv at 4-5 h of operation, and the maximum doses after operation reached 5.69E-07 mSv and 5.31E-08 mSv for the workers and residents, respectively. Even at the exclusion area boundary (EAB), 4.76E-08-9.51E-07 mSv (annual dose:9.52E-05–1.90E-03 mSv/y) was below the dose limit of the EAB, and the safety of the facility installation inside the NPP was confirmed.

Keywords

Acknowledgement

This work was supported by the Korea Institute of Energy Technology Evaluation and Planning and the Ministry of Trade, Industry, and Energy (MOTIE) of the Republic of Korea (grant nos. 20191510301110 and 20214000000410).

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