[1E06-11] Simulation and Measurement

[1E09] Production of scattered radiation contribution measurement device with position information

*Hideo Hirayama^1,2, Kenjiro Kondo^1,2, Seishiro Suzuki², Kohei Iwanaga², Yoshihiko Tanimua³ (1. High Energy Accelerator Reserach Organization, 2. Nuclear Regulation Authority, 3. Japan Atomic Energy Agency)

Keywords:Cs-137, Scattered radiation, Position information

Cs - 137 is the main source at Fukushima Daiichi Nuclear Power Station. However, it is known that the portions of scattered photons are high at many places. It is presumed that the situation is similar in the reactor building as well. Grasping the portion of scattered photons is important for decreasing radiation exposure. We have produced a device that can record the portion of scattered photon of 200 keV or less with the position information by walking even in places where GPS signals can not be received. Outline of the device and examples of the measurement result will be given.