Risk-communication of exposure to radioacive contaminants after the Great East Japan Earthquake disaster

福岛第一核电站灾难引起了人们对即使在低水平污染地区接触和摄入放射性核素所造成的健康后果的关注。我们进行了调查，以检测母乳和母乳喂养母亲的胎盘以及使用重复饮食法的食物中是否存在放射性物质。监测研究表明，母乳和胎盘中没有检测到污染，食品中也有微量污染。然后，利用监测信息对市民进行风险沟通试验。为评估教育讲座的效果，本研究以问卷调查的方式对听课者进行辐射健康知识、风险认知、健康问题及信任等方面的问卷调查。结果表明，参加讲座可以有效降低学生的焦虑水平。

The Fukushima Dai-ichi nuclear disaster raised concerns about the health consequences by exposure to and an intake of radionuclides even at the low-level contaminated areas. We performed surveys to detect the presence of radioactive substances in breast milk and placenta from breast-feeding mothers, and food using the duplicate diet method. The monitoring study suggests that there were no detectable contamination in breast milk and placenta, and a trace level of contamination in food. Then, a trial of risk communication was performed to the citizen using the monitoring information. To assess the effects of educational lecture, a questionnaire survey regarding the radiation health knowledge, risk perception, health issue, and trust was asked to the lecture attendees. The results suggest that to attend the lectures may effective to reduce the anxiety level.