Establishment of dose assessment methods based on individual data for high internal exposure due to I-131 intake

2015 Fiscal Year Final Research Report

• Project/Area Number: 26893330
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Radiation science
• Research Institution: National Institute of Radiological Sciences
• Principal Investigator: Tani Kotaro 国立研究開発法人放射線医学総合研究所, 緊急被ばく医療研究センター, 研究員 (40736071)
• Research Collaborator: KURIHARA Osamu ; KIM Eunjoo ; SAKAI Kazuo ; AKASHI Makoto
• Project Period (FY): 2014-08-29 – 2016-03-31
• Keywords: 内部被ばく / 甲状腺 / I-131 / 安定ヨウ素剤

Outline of Final Research Achievements

Dose assessment based on individual data is required in case of high radiation exposure due to such reasons as emergency response following a nuclear accident. In this study, numerical simulations using an anthropomorphic voxel phantom enabled to evaluate thyroid I-131 content providing local internal dose to thyroid, considering tissue thickness overlaying thyroid. Development of a biokinetic analysis code when administering stable iodine tablets also enabled to evaluate thyroid dose considering an individual intake scenario. Availability of the methods were confirmed by applying to the accident at Fukushima Daiichi Nuclear Power Plant as case examples. The results of this study would be useful for dose reconstruction for high internal exposure to I-131.

Free Research Field

放射線防護