Dose rate evaluation of workers on the operation floor in Fukushima-Daiichi Unit 3 Kaoru Matsushita, Masahiko Kurosawa, Keisuke Shirai, Ippei Matsuoka and Naoki Mukaida EPJ Web Conf., 153 (2017) 05024 Published online: 25 September 2017 DOI: 10.1051/epjconf/201715305024