Earticle

초록

영어

Background: One of the most urgent issues following the accident at the Fukushima Daiichi nuclear power plant (FDNPP) was the remediation of the land, in particular, for residential area contaminated by the radioactive materials discharged. In this study, the effect of decontamination on reduction of ambient dose equivalent outdoors and indoors was evaluated. The latter is essential for residents as most individuals spend a large portion of their time indoors. Materials and Methods: From December 2012 to November 2014, thirty-seven Japanese single- family detached wooden houses were investigated before and after decontamination in evacuation zones. Outdoor and indoor dose measurements (n = 84 and 114, respectively) were collected based on in situ measurements using the NaI (Tl) scintillation surveymeter. Results and Discussion: The outdoor ambient dose equivalents [H*(10)out] ranged from 0.61 to 3.71 μSv h-1 and from 0.23 to 1.32 μSv h-1 before and after decontamination, respectively. The indoor ambient dose equivalents [H*(10)in] ranged from 0.29 to 2.53 μSv h-1 and from 0.16 to 1.22 μSv h-1 before and after decontamination, respectively. The values of reduction efficiency (RE), defined as the ratio by which the radiation dose has been reduced via decontamination, were evaluated as 0.47 ± 0.13, 0.51 ± 0.13, and 0.58 ± 0.08 (average ± σ) when H*(10)out < 1.0 μSv h- 1, 1.0 μSv h-1

목차

ABSTRACT
 Introduction
 Materials and Methods
  1. Measures for Decontamination of Radioactive Materials Discharged by TEPCO’s Fukushima Daiichi NPP accident
  2. Locations of Measurements
  3. Outdoor and Indoor Measurements
 Results and Discussions
  1. Dose Rates due to Natural Radiation Sources in the Environment
  2. Outdoor and Indoor Ambient dose equivalent before decontamination
  3. Reduction Efficiency
 Conclusion
 References

키워드

저자

• Hiroko Yoshida-Ohuchi [ Graduate School of Pharmaceutical Sciences, Tohoku University, Miyagi, Japan ] Corresponding author
• Takashi Kanagami [ Graduate School of Pharmaceutical Sciences, Tohoku University, Miyagi, Japan ]
• Yutaka Naitoh [ Japan Environment Research Co., Ltd., Miyagi, Japan ]
• Mizuki Kameyama [ Japan Environment Research Co., Ltd., Miyagi, Japan ]
• Masahiro Hosoda [ Department of Radiological Life Sciences, Hirosaki University Graduate School of Health Sciences, Aomori, 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