RADIATION MEASUREMENT DEVICE AND RADIATION MEASUREMENT METHOD

• Main Authors: YONETANI YUTAKA, UENO KATSUNOBU, NAGUMO YASUSHI, YOSHIHARA YURI
• Format: Patent
• Language: English; Japanese
• Published: 18.01.2022
• Subjects: MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS; TESTING

To provide a radiation measurement device and a radiation measurement method that can discriminate between neutrons derived from a measurement object and neutrons derived from a peripheral background.SOLUTION: A radiation measurement device 100 includes: two or more neutron detectors 101; a movement mechanism 102 for moving the neutron detectors; a coincidence counting signal measurement device 103 for simultaneously counting a plurality of neutrons emitted at the same time in one reaction, in the neutron detectors 101; a position information device 104 for acquiring positional information of the neutron detectors; a coincidence count value processing device 105 for processing a coincidence count value obtained by the coincidence counting signal measurement device 103 at a position acquired by the position information device; and a coincidence counting value curve calculation device 106 for calculating a coincidence count value derived from a measurement object, from a position dependency curve of a coincidence count value processed by the coincidence count value processing device 105.SELECTED DRAWING: Figure 1 【課題】測定対象物由来の中性子と周辺バックグラウンド由来の中性子とを弁別可能な放射線計測装置および放射線計測方法を提供する。【解決手段】放射線計測装置１００は、２台以上の中性子検出器１０１と、中性子検出器を移動させる移動機構１０２と、１回の反応で同時に放出した複数の中性子を中性子検出器１０１で同時に計数する同時計数信号計測装置１０３と、中性子検出器の位置情報を取得する位置情報装置１０４と、位置情報装置で取得した位置における同時計数信号計測装置１０３で得られた同時計数値を処理する同時計数値処理装置１０５と、同時計数値処理装置１０５で処理された同時計数値の位置依存性曲線から測定対象物由来の同時計数値を演算する同時計数値曲線演算装置１０６と、を備える。【選択図】図１