@article{oai:repo.qst.go.jp:00049361,
 author = {Yajima, Kazuaki and Kim, Eunjoo and Tani, Kotaro and Tatsuzaki, Hideo and Li, Chunsheng and Kurihara, Osamu and Yajima, Kazuaki and Eunjoo, Kim and Tani, Kotaro and Tatsuzaki, Hideo and Kurihara, Osamu},
 issue = {4},
 journal = {Radiation Protection Dosimetry},
 month = {Oct},
 note = {In the aftermath of the 2011 Fukushima nuclear disaster, a screening survey for thyroid internal exposure from intake of radioiodine was performed on 1080 children using handheld NaI(Tl) survey meters. This article presents the design and results of a practical exercise conducted to develop the skills of personnel who would be potentially engaged in such a survey. Participants of this exercise were asked to measure manikin heads in which point sources were installed under normal (~0.05 μSv h−1) and elevated (~0.5 μSv h−1) background conditions. The results demonstrated that the measurements were less dependent on the background radiation level, and the deviation of net signals obtained by the participants were within 10–20% for dose rates above 0.2 μSv h−1. This result suggests that dose rates can be reliably obtained above a provisional operational intervention level for the device, 0.5 μSv h−1 under a real nuclear accident situation.},
 pages = {483--488},
 title = {A screening survey exercise for thyroid internal exposure from radioiodine after a nuclear accident},
 volume = {183},
 year = {2018}
}