title: Changes in ambient dose equivalent rates around roads at Kawamata town after the Fukushima accident.
abstract: Changes in ambient dose equivalent rates noted through vehicle-borne surveys have elucidated ecological half-lives of radioactive caesium in the environment. To confirm that the ecological half-lives are appropriate for predicting ambient dose equivalent rates within living areas, it is important to ascertain ambient dose equivalent rates on/around roads. In this study, radiation monitoring on/around roads at Kawamata town, located about 37 km northwest of the Fukushima Daiichi Nuclear Power Plant, was performed using monitoring vehicles and survey meters. It was found that the ambient dose equivalent rates around roads were higher than those on roads as of October 2012. And withal the ecological half-lives on roads were essentially consistent with those around roads. With dose predictions using ecological half-lives on roads, it is necessary to make corrections to ambient dose equivalent rates through the vehicle-borne surveys against those within living areas.
authors.affiliation: Japan Atomic Energy Agency, 2-4 Shirakata-Shirane, Tokai-mura, Ibaraki 319-1195, Japan kinase.sakae@jaea.go.jp.
authors.forename: Sakae
authors.initials: S
authors.lastname: Kinase
authors.affiliation: Japan Atomic Energy Agency, 2-4 Shirakata-Shirane, Tokai-mura, Ibaraki 319-1195, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Sato
authors.affiliation: Institute of Radiation Measurements, 2-4 Shirakata-Shirane, Tokai-mura, Ibaraki 319-1106, Japan.
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Sakamoto
authors.affiliation: Japan Atomic Energy Agency, 2-4 Shirakata-Shirane, Tokai-mura, Ibaraki 319-1195, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Yamamoto
authors.affiliation: Japan Atomic Energy Agency, 2-4 Shirakata-Shirane, Tokai-mura, Ibaraki 319-1195, Japan.
authors.forename: Kimiaki
authors.initials: K
authors.lastname: Saito
mesh_terms: D001336:Automobiles / Q000706:statistics & numerical data*; D002588:Cesium Radioisotopes / Q000032:analysis*; D003198:Computer Simulation; D062406:Fukushima Nuclear Accident; D006207:Half-Life; D007564:Japan; D015233:Models, Statistical; D000069079:Radiation Exposure / Q000706:statistics & numerical data*; D011834:Radiation Monitoring / Q000379:methods*; D011847:Radioactive Fallout / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D002588:Cesium Radioisotopes; D011847:Radioactive Fallout