Earticle

초록

영어

Background: After the Fukushima Daiichi Nuclear Power Station (FDNPS) accident, a model was developed to estimate the external exposure doses for residents who were expected to return to their homes after evacuation orders were lifted. However, the model’s accuracy and uncertainties in parameters used to estimate external doses have not been evaluated. Materials and Methods: The model estimates effective doses based on the integrated ambient dose equivalent (H*(10)) and life patterns, considering a dose reduction factor to estimate the indoor H*(10) and a conversion factor from H*(10) to the effective dose. Because personal dose equivalent (Hp(10)) has been reported to agree well with the effective dose after the FDNPS accident, this study validates the model’s accuracy by comparing the estimated effective doses with Hp(10). The Hp(10) and life pattern data were collected for 36 adult participants who lived or worked near the FDNPS in 2019. Results and Discussion: The estimated effective doses correlated significantly with Hp(10); however, the estimated effective doses were lower than Hp(10) for indoor sites. A comparison with the measured indoor H*(10) showed that the estimated indoor H*(10) was not underestimated. However, the Hp(10) to H*(10) ratio indoors, which corresponds to the practical conversion factor from H*(10) to the effective dose, was significantly larger than the same ratio outdoors, meaning that the conversion factor of 0.6 is not appropriate for indoors due to the changes in irradiation geometry and gamma spectra. This could have led to a lower effective dose than Hp(10). Conclusion: The estimated effective doses correlated significantly with Hp(10), demonstrating the model’s applicability for effective dose estimation. However, the lower value of the effective dose indoors could be because the conversion factor did not reflect the actual environment.

목차

ABSTRACT
Introduction
Materials and Methods
1. Collection of Personal Dose Equivalent and Life Patterns
2. Data Analysis
3. Measurement of Actual Field
Results and Discussion
1. Time Proportion in Life Patterns
2. Relationship between the Estimated Effective Doses and Personal Dose Equivalents
3. Uncertainty in the Indoor Ambient Dose Equivalent
4. Uncertainty in Conversion Factor Indoors
Conclusion
Conflict of Interest
Acknowledgements
Author Contribution
References

키워드

저자

• Rina Sato [ Sector of Fukushima Research and Development, Japan Atomic Energy Agency, Fukushima, Japan ] Corresponding Author
• Kazuya Yoshimura [ Sector of Fukushima Research and Development, Japan Atomic Energy Agency, Fukushima, Japan ]
• Yukihisa Sanada [ Sector of Fukushima Research and Development, Japan Atomic Energy Agency, Fukushima, Japan ]
• Tetsuro Sato [ Public Solution Division, Hitachi Solutions East Japan Ltd., Sendai, Japan ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  방사선방어학회지 [Journal of Radiation Protection and Research]

• 간기

  계간

• pISSN

  2508-1888

• 수록기간

  1976~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 559 DDC 629