RADIOACTIVE MATERIAL MOVING PATH ESTIMATION METHOD AND DECONTAMINATION METHOD

• Main Authors: OKAZAKI NORIAKI, YOKOZUKA SUSUMU, TANABE DAIJIRO
• Format: Patent
• Language: English; Japanese
• Published: 02.03.2015
• Subjects: DECONTAMINATION ARRANGEMENTS THEREFOR; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; TESTING; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

PROBLEM TO BE SOLVED: To enable the estimation of moving paths of radioactive materials in areas contaminated with radioactive materials.SOLUTION: A radioactive material moving path estimation method comprises: a data acquisition step of acquiring radiation dose rate time-series data at a plurality of spots contaminated with radioactive materials; and a correlation determination step of determining a correlation between one radiation dose rate time-series data acquired in one spot and other radiation dose rate time-series data acquired in other spots. In the data acquisition step, radiation dose rate time-series data is acquired: at the plurality of spots after they have been decontaminated; or at the plurality of spots after they have had rainfall or after water has been sprinkled on them. 【課題】放射性物質で汚染された地域において、放射線物質の移動経路を推定できるようにすることを目的とする。【解決手段】本発明に係る放射線物質移動経路推定方法は、放射線物質により汚染された複数の地点で線量率時系列データを取得するデータ取得ステップと、一の地点で取得された一方の線量率時系列データと他の地点で取得された他方の線量率時系列データとの相関関係を判定する相関判定ステップと、を備えた。また、データ取得ステップにおいては、除染後の前記複数の地点又は降雨後又は散水後の前記複数の地点で線量率時系列データを取得するようにした。【選択図】図４