J-STAGE｜保健物理　53 巻 (2018) 2 号｜External Dose Estimation in an Early Stage after the Fukushima Daiichi Nuclear Power Plant Accident

The Basic survey as a part of the Fukushima Health Management Survey was a self-administered questionnaire that asked subjects to record and send back information on their behavior in the 4 months after the Fukushima disaster. These behavior records were then digitalized, and individual estimates of external radiation exposure were made using daily ambient dose rate maps. Several issues arose in the process from receiving the completed questionnaires, estimating doses, and informing residents of the results. After sending out the questionnaires, a large number (8,000 responses per day at its peak) were returned over a short period, and these needed to be processed.