Whole-body counter surveys of Miharu-town school children for four consecutive years after the Fukushima NPP accident

Proceedings of the Japan Academy. Series B, Physical and Biological Sciences
Ryugo HayanoYu Sakuma

Abstract

Comprehensive whole-body counter surveys of Miharu-town school children have been conducted for four consecutive years, in 2011-2014. This represents the only long-term sampling-bias-free study of its type conducted after the Fukushima Dai-ichi accident. For the first time in 2014, a new device called the Babyscan, which has a low (134/137)Cs MDA of <50 Bq/body, was used to screen the children shorter than 130 cm. No child in this group was found to have detectable level of radiocesium. Using the MDAs, upper limits of daily intake of radiocesium were estimated for each child. For those screened with the Babyscan, the upper intake limits were found to be ≲1 Bq/day for (137)Cs. Analysis of a questionnaire filled out by the children's parents regarding their food and water consumption shows that the majority of Miharu children regularly consume local and/or home-grown rice and vegetables. This however does not increase the body burden.

References

Jul 16, 2004·Radiation Protection Dosimetry·N IshigureH Enomoto
Nov 10, 2012·Proceedings of the Japan Academy. Series B, Physical and Biological Sciences·Shun-ichi Tanaka
Apr 12, 2013·Proceedings of the Japan Academy. Series B, Physical and Biological Sciences·Ryugo S HayanoYu Sakuma
Jun 13, 2014·Proceedings of the Japan Academy. Series B, Physical and Biological Sciences·Ryugo S HayanoYu Sakuma
Aug 15, 2014·Journal of Radiological Protection : Official Journal of the Society for Radiological Protection·Ryugo S HayanoIsamu Muramatsu

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Methods Mentioned

BETA
MDAs
MDA

Software Mentioned

Babyscan
Mondal3
Fastscan

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