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Integral experiment of induced radioactivity in D-T fusion neutron environment and validation of activation cross section library

Y. Kasugai, Y. Ikeda, F. Maekawa, C. Konno, M.A. Abdou1998年Fusion Engineering and DesignIF 1.7出版社

AbstractUnder ITER/EDA R&D Task T-218, an integral experiment on the induced radioactivity was conducted at the Fusion Neutronics Source (FNS) facility in JAERI. The objective was to provide experimental data for validating the inventory calculation codes and relevant activation cross section libraries to be used in the ITER nuclear design. Sample materials investigated were Al, Mg, Ti, V, Mn, Fe, Ni, SS-316LN, Cu, Zn, Nb, Mo, Ag, In, Sn, Hf, Ta, W and Pb. The corresponding neutron spectra at two locations were calculated by MCNP4A with JENDL-Fusion File based nuclear data library by modeling the experimental assembly precisely. The calculations with currently updated activation cross sections, JENDL-ACT96, FENDL-A1 and FENDL-A2, were carried out to compare the results with the experiment. The results for the comparison between the measurement and calculation of radioactivity are discussed in terms of the adequacy of calculation as far as the D-T neutron dominated neutron field is concerned.

日本語訳

ITER/EDA タスク T-218 の下で、原研の核融合中性子源施設(FNS)において、誘導放射能に関する積分実験を実施した。その目的は、ITER 核設計に使用されるインベントリ計算コードと関連する放射化断面積ライブラリを検証するための実験データを提供することであった。調査対象の試料材料は、Al、Mg、Ti、V、Mn、Fe、Ni、SS-316LN、Cu、Zn、Nb、Mo、Ag、In、Sn、Hf、Ta、W であった。対応する中性子スペクトルは、実験体系を精密にモデル化し、JENDL-Fusion File に基づく核データライブラリを用いた MCNP4A により、2 箇所で計算された。最新の放射化断面積ライブラリ(JENDL-ACT96、FENDL-A1、FENDL-A2)を用いた計算を実施し、実験結果と比較した。D-T 中性子が支配的な中性子場における放射能の測定値と計算値の比較結果に基づき、各ライブラリの計算妥当性について考察した。

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