Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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New skeletal dose coefficients of the ICRP-110 reference phantoms for idealized external fields to photons and neutrons using dose response functions (DRFs)

  • Bangho Shin (Department of Nuclear Engineering, Hanyang University) ;
  • Yumi Lee (Department of Radiation Convergence Engineering, Yonsei University) ;
  • Ji Won Choi (Department of Radiation Convergence Engineering, Yonsei University) ;
  • Soo Min Lee (Department of Radiation Convergence Engineering, Yonsei University) ;
  • Hyun Joon Choi (Department of Radiation Oncology, Yonsei University Wonju College of Medicine) ;
  • Yeon Soo Yeom (Department of Radiation Convergence Engineering, Yonsei University)
  • Received : 2022.06.08
  • Accepted : 2023.03.09
  • Published : 2023.06.25
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Abstract

The International Commission on Radiological Protection (ICRP) Publication 116 was released to provide a comprehensive dataset of the dose coefficients (DCs) for external exposures produced with the adult reference voxel phantoms of ICRP Publication 110. Although an advanced skeletal dosimetry method for photons and neutrons using fluence-to-dose response functions (DRFs) was introduced in ICRP Publication 116, the ICRP-116 skeletal DCs were calculated by using the simple method conventionally used (i.e., doses to red bone marrow and endosteum approximated by doses to spongiosa and/or medullary cavities). In the present study, the photon and neutron DRFs were used to produce skeletal DCs of the ICRP-110 reference phantoms, which were then compared with the ICRP-116 DCs. For photons, there were significant differences by up to ~2.8 times especially at energies <0.3 MeV. For neutrons, the differences were generally small over the entire energy region (mostly <20%). The general impact of the DRF-based skeletal DCs on the effective dose calculations was negligibly small, supporting the validity of the ICRP-116 effective DCs despite their skeletal DCs derived from the simple method. Meanwhile, we believe that the DRF-based skeletal DCs could be beneficial in better estimates of skeletal doses of individuals for risk assessments.

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Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean government (No. 2022R1C1C100809311), Regional Innovation Stratege (RIS) through NRF funded by the Ministry of Education (MOE) (No. 2022RIS-005) and Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government (MOTIE) (No. 20214000000070).

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