Study on the Delayed Neutron Nuclear Data for Analysis of Accelerator-Driven Reactor Dynamics

用于加速器驱动反应堆动力学分析的延迟中子核数据研究

• 批准号: 23561016
• 负责人: OHSAWA Takaaki
• 金额: $ 2.58万
• 依托单位: Kinki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23561016/
• 关键词: 加速器駆動未臨界炉; 遅発中性子; 核データ; アクチニド核種; 核分裂収率; 遅発中性子放出確率; 先行核; 加速器駆動炉; 遅発中性子収率; 入射エネルギー依存性; 原子力エネルギー; 動特性

Evaluation methods for the delayed neutron yield (DNY) data for actinides for use in the analysis of dynamics of an accelerator-driven system were studied. The findings are the following: (1) The DNY calculated with summation method showed an exponential decrease similar to the one observed in experiments as we go to heavier actinides; (2) Two different sets of DN emission probability led to calculated results several times discrepant in magnitude; (3) More than 90% of contribution to the total DNY comes from major 20 precursors. This implies importance of improving accuracy of DN emission probability for these precursors; (4)At higher energies the DNY tends to decrease, the degree of which depends on prompt neutron multiplicity and proton even-odd effects of precursors.

研究了用于加速器驱动系统动力学分析的锕系元素延迟中子产额（DNY）数据的评估方法。研究结果如下：（1）当我们使用较重的锕系元素时，用求和法计算的 DNY 显示出与实验中观察到的类似的指数下降； (2)两组不同的DN排放概率导致计算结果多次出现幅度差异； （3）DNY总量的90%以上贡献来自于20个主要前体。这意味着提高这些前体的 DN 排放概率的准确性非常重要； (4)在较高能量下，DNY趋于降低，其程度取决于前驱体的瞬发中子多重性和质子奇偶效应。

项目成果

Measurement of large negative reactivity of an accelerator-driven system in the Kyoto University Critical Assembly

京都大学批判大会中加速器驱动系统的大负反应性测量

• 发表时间: 2013
• 期刊: Journal of Nuclear Science and Technology
• 影响因子: 1.2
• 作者: Atsushi Sakon;Kengo Hashimoto;Muhammad Aiman bin Maarov;Masahiro Kawasaki;Wataru Sugiyama;Cheol-Ho Pyeon;Tadafumi Sano;Takaaki Ohsawa
• 通讯作者: Takaaki Ohsawa

Power spectral analysis for a thermal subcritical reactor system driven by a pulsed 14 MeV neutron source

由脉冲 14 MeV 中子源驱动的热亚临界反应堆系统的功率谱分析

• 发表时间: 2013
• 期刊: Journal of Nuclear Science and Technology
• 影响因子: 1.2
• 作者: Atsushi Sakon;Kengo Hashimoto;Wataru Sugiyama;Hiroshi Taninaka;Cheol-Ho Pyeon;Tadafumi Sano;Tsuyoshi Misawa;Hironobu Unesaki;Takaaki Ohsawa
• 通讯作者: Takaaki Ohsawa

Thサイクル核種およびMA核種の核分裂即発中性子スペクトル計算方法の精密化

Th周期核素和MA核素裂变瞬发中子能谱计算方法的细化

• 发表时间: 2014
• 作者: 有澤公一;大澤孝明
• 通讯作者: 大澤孝明