RADIOACTIVE CONCENTRATION MEASUREMENT DEVICE

PROBLEM TO BE SOLVED: To provide a radioactive concentration measurement device capable of obtaining a more accurate measurement result.SOLUTION: A radioactive concentration measurement device 1 includes: a storage tank 3 for storing measurement water W1; a radioactive concentration sensor 20 for measuring a radioactive concentration of the measurement water W1; an exhaust system flow channel 7 for exhausting the measurement water W1 from the storage tank 3; a jet nozzle 26 for jetting the measurement water W1 from a side wall surface of the storage tank 3 to an inner part side; and a control device 8 for controlling operations of the radioactive concentration sensor 20, the exhaust system flow channel 7, and the jet nozzle 26. The control device 8 performs a control including a first operation for causing the exhaust system flow channel 7 to exhaust the measurement water W1 from the storage tank 3 and a second operation for causing the jet nozzle 26 to operate so as to clean one portion of the storage tank 3 by allowing the measurement water W1 to be jetted.SELECTED DRAWING: Figure 1 【課題】より確かな計測結果を得ることが可能な放射能濃度計測装置を提供する。【解決手段】放射能濃度計測装置１は、計測水Ｗ１を収容する貯留槽３と、計測水Ｗ１の放射能濃度を計測する放射能濃度センサ２０と、計測水Ｗ１を貯留槽３から排出する排出系流路７と、計測水Ｗ１を貯留槽３の側壁面から内部側に噴出する噴出ノズル２６と、放射能濃度センサ２０、排出系流路７及び噴出ノズル２６の動作を制御する制御装置８と、を備える、制御装置８は、貯留槽３から計測水Ｗ１を排出するように排出系流路７を動作させる第１動作と、計測水Ｗ１を噴出させることにより貯留槽３の一部分を洗浄するように噴出ノズル２６を動作させる第２動作と、を含む制御を行う。【選択図】図１