基于福岛核事故监测数据的辐射剂量场重构方法研究

摘要/Abstract

摘要： 辐射剂量场的重构是核事故后开展应急工作的一种重要手段。为了比较不同插值方法用于辐射剂量场重构的优劣,基于日本福岛第一核电站事故后发布的监测数据,分别利用反距离权重插值法、克里金插值法、线性三角网插值法和径向基函数插值法4种方法进行辐射剂量场重构。通过划分不同数量的测试集,以均方根误差、平均绝对误差以及标准偏差为判别依据,将这几种插值方法对辐射剂量场重构的精度进行对比。研究结果表明,径向基函数插值法的均方根误差和标准偏差均保持在1.7以下,平均绝对误差保持在0.41以下,在插值精度上优于其他3种方法,能够更准确地确定福岛核事故后辐射剂量分布,并有望扩展到其他辐射剂量场,为开展后续核应急工作提供有力的剂量评估与辐射剂量场重构工具。

关键词: 辐射剂量场重构, 监测数据, 空间插值, 径向基函数, 福岛核事故

Abstract: The reconstruction of radiation dose field is an important tool for emergency work after nuclear accidents. In order to explore suitable interpolation method for radiation dose field reconstruction, in this article the inverse distance weighted interpolation, kriging interpolation, linear triangulation interpolation, and radial basis function interpolation are used respectively, to interpolate and reconstruct the radiation monitoring data released after the accident at the Fukushima Daiichi Nuclear Power Plant in Japan. By dividing different numbers of test sets, the accuracy of radiation dose field reconstruction through these interpolation methods were compared when taking the root mean square error, average absolute error, and standard deviation as basis. The research results show that the radial basis function interpolation is superior to the other three methods in accuracy of interpolation, and can determine the radiation dose distribution more accurately. It is also expected to be applied to other radiation dose fields and provide powerful dose assessment and radiation dose field reconstruction tools for subsequent nuclear emergency work.

Key words: radiation dose field reconstruction, monitoring data, spatial interpolation, radial basis function, Fukushima nuclear accident

中图分类号:

TL72

徐瑶, 陈晓雷, 黄广伟, 吴涢晖, 陈林. 基于福岛核事故监测数据的辐射剂量场重构方法研究[J]. 辐射防护, 2022, 42(3): 193-200.

XU Yao, CHEN Xiaolei, HUANG Guangwei, WU Yunhui, CHEN Lin. Research on radiation dose field reconstruction method based on monitoring data from Fukushima nuclear accident[J]. RADIATION PROTECTION, 2022, 42(3): 193-200.

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