著者
前田 茂貴 井口 哲夫
出版者
Atomic Energy Society of Japan
雑誌
日本原子力学会和文論文誌 (ISSN:13472879)
巻号頁・発行日
vol.10, no.2, pp.63-75, 2011 (Released:2012-03-17)
参考文献数
59
被引用文献数
1 1

Neutron spectrum unfolding is a widely used technique for characterizing neutron fields for various types of reactor dosimetry, where the neutron spectrum is derived from integral measured data such as multiple-foil activation rates and moderated neutron detector counts. Many spectrum unfolding codes have been developed so far and their performances have been compared. However, a standardized metrology for neutron spectrum unfolding has not been satisfactorily established yet from the viewpoints of adequate selection and usage of unfolding codes, response function database and input data set preparation. This article reviews the present status of the neutron spectrum unfolding technique that is mainly related to reactor dosimetry with activation foils and discusses the validity of the solution spectra obtained from different unfolding codes under a typical fast reactor neutron field. The results show that the solution spectrum strongly depends on a priori (i.e., guess) spectrum required for the input data as well as the theoretical assumption in each unfolding code. The issues that must be resolved to improve the accuracy of reactor dosimetry are summarized for the a priori input spectrum, the nuclear database, and the standardization of the unfolding procedure.

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外部データベース (DOI)

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ちょっとこの流れを https://t.co/Udf0USNlgk 原子炉ドシメトリーとは,原子炉の材料や機器に対する放射線(特に,中性子)照射効果を定量的に計測・評価する技術である。 ドシメトリーという言葉は目にしtいましたが、こういう意味だったんですねえ。一度目は通しましたが、難しい用語が多い。
断面積という表現ながらこれも確率の一種 https://t.co/QEff0Q7Qyw 中性子が核と反応する確率に相当する概念「断面積」を導入する。 あれ マルコフ連鎖出てきたぞ https://t.co/Udf0USNlgk 二か所ですが、4ページと8ページ MIEKEというコード

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