MEASUREMENT DEVICE AND METHOD OF TOTAL GAMMA ACTIVITY FOR CLEARANCE

摘要

The present invention relates to a device and a method to measure total gamma radioactivity generated from waste in order to check radioactive contamination. The measurement device of the present invention comprises: a measurement chamber (110) of a hexahedron housing structure capable of shielding radioactivity; a Nal scintillation detector module formed with at least one Nal scintillation detector (120) arranged on each plane in the measurement chamber (110); a plastic scintillation detector module formed with at least two plastic scintillation detectors (130) arranged on each plane in the measurement chamber (110); and an analysis unit which receives a signal detected in the Nal scintillation detector module and the plastic scintillation detector module, calculating a total gamma radioactivity of the waste.