RADIOACTIVE CONCENTRATION MEASUREMENT DEVICE, SPATIAL DOSE RATE MEASUREMENT DEVICE AND RADIOACTIVE CONCENTRATION MEASUREMENT METHOD

• Main Authors: HIRANO HIROYUKI, MATSUO YOSHIMI, OTA YUJI, TANAKA MAYUMI, SUYAMA YASUHIRO, KAWABATA JUNICHI, MIYAUCHI YOSHIKAZU
• Format: Patent
• Language: English
• Published: 09.06.2014
• Subjects: MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To easily measure a radioactive concentration of a measured object, while suppressing an influence of a background.SOLUTION: A radioactive concentration measurement device 1 comprises: a storage container 21; a γ-ray detection part 27; a radioactive concentration identification part 31; and an output device 4. The storage container 21 stores a measured object (for example, sediment). The γ-ray detection part 27 is disposed in the storage container 21 so as to be surrounded by the measured object stored in the storage container 21, detects the γ-ray to be discharged from the measured object and outputs an electric signal. The radioactive concentration identification part 31 identifies a spatial dose rate DL (in-container spatial dose rate) within the storage container 21 on the basis of the electric signal from the γ-ray detection part 27, and identifies a radioactive concentration RC of the measured object on the basis of the identified in-container spatial dose rate DL. The output device 4 performs a screen display and the like of the in-container spatial dose rate DL and the radioactive concentration RC of the measured object.