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福島第一事故廃棄物のインベントリ評価手法の開発,13; 解析的推算方法への統計論的アプローチ導入の検討

Development of inventory evaluation methods for the radioactive wastes of Fukushima Daiichi Nuclear Power Station, 13; Introduction of stochastic approach to the modelling estimation method

杉山 大輔*; 駒 義和  ; 高畠 容子  ; 青木 義雄*; 中林 亮*; 藤田 智成*

Sugiyama, Daisuke*; Koma, Yoshikazu; Takahatake, Yoko; Aoki, Yoshio*; Nakabayashi, Ryo*; Fujita, Tomonari*

福島第一原子力発電所で発生する廃棄物の核種インベントリを解析的に推算する方法について、蓄積が進んできた実廃棄物や滞留水などの分析データの頻度分布を反映した統計論的アプローチの導入を検討した。核種の移行パラメータを対数正規分布に拠って設定し、推算精度の向上を可能とする見込みを得た。

The introduction of a stochastic approach to the calibration of the radionuclide transport parameters, which processes the frequency distribution of the analytical measured data accumulated progressively on the wastes and contaminated water, into the modelling estimation method of the radioactive waste inventory generated at the Fukushima Daiichi Nuclear Power Station is investigated. It is expected that the accuracy of the modelling estimation of radionuclide composition in wastes will be improved by describing the radionuclide transport parameters as a lognormal distribution.

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