[2N08-13] Photon Measurement 1

[2N08] Measurement of Cs-137 contamination density at Unit-2 of Fukushima Daiichi with the pinhole gamma camera

*Hirayama Hideo^1,2, Katsumi Hayashi², Kohei Iwanaga², Kenjiro Kondo^1,2, Seishiro Suzuki² (1. High Energy Accelerator Research Organization, 2. Nuclear Regulation Authority)

Keywords:Cs-137 contamination density , gamma camera , Fukushima Daiichi Nuclear Power Station

The Cs-137 radioactivity measurement method using the Cs-137 total energy absorption peak count rate of the pinhole gamma camera devised by speakers was applied to the operation floor of Fukushima Daiichi Nuclear Power Station Unit 2. Cs-137 contamination density on the wall and floor was measured. We will report obtained results together with the comparison with the results of smear measurements made by TEPCO.