Study on identification of end-point of radiation contamination in sediment in a bay and evaluation of its relative risk

2016 Fiscal Year Final Research Report

• Project/Area Number: 25630206
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Hydraulic engineering
• Research Institution: The University of Tokyo
• Principal Investigator: Sasaki Jun 東京大学, 大学院新領域創成科学研究科, 教授 (50292884)
• Research Collaborator: O Hechon
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 海岸工学 / 沿岸環境 / 放射能 / 底質 / 東京湾 / 内湾 / リスク評価 / 水工学

Outline of Final Research Achievements

Radiation contamination in the sediment of Tokyo Bay was identified on the basis of measurement of Cs137 after taking sediment core samples at the head of Tokyo Bay. End-point of the radiation contamination was then identified, followed by evaluation of its relative risk in terms of loss life expectancy through comparison with other risks, including traffic accident. It was found that the risk of radiation contamination of the sediment is basically considered as low but when concrete information is provided, the concern tends to increase and willingness to pay for countermeasures also tends to increase.

Free Research Field

環境水工学，海岸工学，沿岸環境学，国際開発学