Characterization of the Radiological Environment at J-Village during Operation Tomodachi

Abstract

Abstract : This report presents a characterization of the radiological environment during Operation Tomodachi at J-Village, a facility located 12.5 mi (20 km) south of the Tokyo Electric Power Company's (TEPCO) Fukushima Daiichi Nuclear Power Station (FDNPS). The accident at FDNPS following the earthquake and tsunami on March 11, 2011 in Japan resulted in releases of radioactive materials into the environment. TEPCO used J-Village as a staging area for emergency response and cleanup. Individuals affiliated with the U.S. Department of Defense visited J-Village during Operation Tomodachi. The data presented in this report include personal dosimetry and internal monitoring results for DOD-affiliated individuals who visited J-Village, as well as external exposure rate measurements and the results of air, soil, and vegetation sampling at or nearby the site. Guidelines for use of the data in future radiation dose assessments are also provided.