[10a-Z14-1~13] 2.3 Application, radiation generators, new technology

△ [10a-Z14-7] Development of a portable radioactive inspection system for measuring radioactivity concentration of trees for log cultivation

〇Mika Kagaya¹, Hideaki Katagiri³, Ryoji Enomoto², Miyuu Kindaichi⁴, Hiroishi Muraishi⁵, Saki Ishikawa⁵, Takara Watanabe⁶ (1.NIT, Sendai Col., 2.Univ. of Tokyo, 3.Ibaraki Univ., 4.Ibaraki PFRI, 5.Kitasato Univ., 6.NCCHE)

Keywords:scintillation detector, radioactive inspection system, 32-keV characteristic X-ray

Log cultivation of shiitake mushroom production has been declining because of the Fukushima Daiichi Nuclear Power Plant accident. We need the selection of a safe tree less than the limit of 50 Bq/kg to restart the shiitake mushroom production. For the current test methods, we need the extra manpower and cost to fell trees and carry them to an inspection site. In this study, we focused on the detection of 32-keV characteristic X-ray and developed a portable inspection system that can detect a small amount of radioactivity concentration even at a low-level contaminated area (~0.1 μSv/h).