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Nuclear heating measurements for SS-316, copper, graphite, tungsten, chromium, beryllium in a copper centered assembly bombarded with 14 MeV neutrons and analysis

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

AbstractUnder ITER/EDA R&D Task T-218, an experiment on nuclear heating was conducted at the Fusion Neutronics Source Facility (FNS) in JAERI in order to provide experimental data of nuclear heating for structural materials and to validate the data and methods relevant to ITER design calculations. Probe materials, SS-316, Cu, W, Zr, Be, Cr and graphite were tested in a copper centered experimental assembly bombarded with 14 MeV neutrons. A calorimetric method and TLDs were employed for total heating and γ-heating measurements, respectively. The measurements were carried out along a central axis of a copper centered experimental assembly. The total heating rate in the probe material was derived from a temperature rise measured by a thermistor attached to the probe. MCNP4A with JENDL-3.2, JENDL-Fusion File and FENDL-1 libraries were used for experimental analyses. Nuclear heating was derived with the use of KERMA factors based on JENDL-3.2 and FENDL-1. The adequacy of the KERMA data is discussed based on nuclear heating ratios of calculation to experiment (C/E).

日本語訳

ITER/EDAタスクT-218の下で、核発熱に関する実験がJAERIの核融合中性子源施設(FNS)において実施され、構造材料の核発熱に関する実験データを提供し、ITER設計計算に関連するデータと手法を検証することを目的とした。プローブ材料として、SS-316、Cu、W、Zr、Be、Cr、およびグラファイトが、14MeV中性子で照射された銅中心実験体系内で試験された。全発熱測定には熱量計法が、γ発熱測定にはTLDがそれぞれ用いられた。測定は銅中心実験体系の中心軸に沿って実施された。プローブ材料における全発熱率は、プローブに取り付けられたサーミスタによる温度上昇から導出された。実験解析には、JENDL-3.2、JENDL融合ファイル、およびFENDLライブラリを用いたMCNP4Aが使用された。核発熱は、JENDL-3.2およびFENDLに基づくKERMA係数を用いて導出された。KERMAデータの妥当性は、核発熱の計算値と実験値の比(C/E)に基づいて考察された。

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