Japan Atomic Energy Agency, 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan.
J Radiol Prot. 2021 Aug 18;41(3). doi: 10.1088/1361-6498/abfbc1.
An enormous amount of environmental monitoring data has been acquired by various organisations for the evaluation and implementation of countermeasures to mitigate the effects of the accident at the Fukushima Daiichi Nuclear Power Plant. However, it is difficult to collate, compare, and analyse this data because it was published in different formats at different sites according to the respective objectives of the publishing organisations. Moreover, these organisations have been accumulating data in large volumes for over nine years after the accident. We established procedures to collect this data, convert them into a unified format, classify them according to categories, and make the data accessible on a web-based database system. The database contains environmental monitoring data on air dose rates, ground deposition densities, and concentrations in various environmental samples such as soil, water, and food. This data is being provided not only in numerical format for quantitative analysis but also as distribution maps and time-series graphs for visual understanding. The database system enabled us to spatially and temporally compare large volumes of monitoring data. By using the database functions, characteristics of some representative data in the database was clarified.
大量的环境监测数据已被各组织获取，用于评估和实施应对福岛第一核电站事故影响的措施。然而，由于这些数据是根据发布组织的各自目标，以不同的格式在不同的地点发布的，因此很难对其进行整理、比较和分析。此外，这些组织在事故发生后九年多的时间里一直在大量积累数据。我们建立了程序来收集这些数据，将其转换为统一的格式，根据类别对其进行分类，并在基于网络的数据库系统上提供这些数据。该数据库包含了空气剂量率、地面沉积密度以及土壤、水和食品等各种环境样本中的浓度等环境监测数据。这些数据不仅以数字格式提供，用于定量分析，还以分布地图和时间序列图的形式提供，便于直观理解。该数据库系统使我们能够对大量监测数据进行时空比较。通过使用数据库功能，我们还阐明了数据库中一些代表性数据的特征。
