European Radiation Dosimetry Group e.V. (EURADOS) survey on individual monitoring data and dose assessment has been carried out for 550 foreigners returning home after being exposed in Japan to intakes of radionuclides (mainly (131)I, (132)I, (132)Te, (134)Cs and (137)Cs) as a consequence of the Fukushima Daiichi NPP accident. In vivo and in vitro measurements were performed in their respective countries at an early stage after that accident. Intakes of radionuclides were detected in 208 persons from Europe and Canada, but the committed effective dose E(50) was below the annual dose limit for the public (<1 mSv) in all the cases. Lessons learned from this EURADOS survey are presented here regarding not only internal dosimetry issues, but also the management of the emergency situation, the perception of the risk of health effects due to radiation and the communication with exposed persons who showed anxiety and lack of trust in monitoring data and dose assessments.

BfS Bundesamt für Strahlenschutz Ingolstädter Landstraße 1 Neuherberg 85764 Germany

CIEMAT Centro de Investigaciones Energéticas Medioambientales y Tecnologicas Avda Complutense 40 Madrid 28040 Spain

IRSN Institut de Radioprotection et de Sûreté Nucléaire IRSN PRP HOM SDI LEDI BP 17 Fontenay aux Roses 92262 France

KIT Karlsruhe Institute of Technology Hermann von Helmholtz Platz 1 Eggenstein Leopoldshafen 76344 Germany

LIA NRW Ulenbergstr 127 131 Düsseldorf 40225 Germany

NCBJ National Centre for Nuclear Research Rad Prot Measurement Lab A Sołtana Otwock 705 400 Poland

SCK CEN Belgian Nuclear Research Centre Boeretang 200 Mol 2400 Belgium

SSM Strålsäkerhetsmyndigheten Stockholm Sweden

SÚRO Bartoškova 28 Prague 4 140 00 Czech Republic

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