Neutron Flux Measurements in ITER-TBM Simulating Assemblies by means of Multi-Foil Activation Method
Neutron Flux Measurements in ITER-TBM Simulating Assemblies by means of Multi-Foil Activation Method
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利用多箔激活法测量 ITER-TBM 模拟装置中的中子通量
DOI：
10.15669/pnst.1.142
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
C. Konno
中科院分区：
文献类型：
--
作者：
K. Ochiai;Y. Tatebe;K. Kondo;S. Ohnishi;S. Sato;K. Takakura;C. Konno
利用多箔活化法（MFAM）在日本原子能机构的FNS设备上测量了铍和ITER-TBM模拟组件中的中子能谱，以证实MFAM的适用性。一个展开代码，NEUPAC，被用来确定中子通量谱。用蒙特卡罗程序MCNP4C和核数据库FENDL-2.1计算初始猜测中子能谱。反应率采用JENDL剂量测定文件99作为反应数据。我们用MFAM推导了模拟组件的中子通量谱。实验结果表明，MFAM给出的结果较好，表明MFAM在ITER-TBM中应用中子谱测量具有广阔的前景。但是，也指出了在10 eV以下的慢中子测量中需要改进的地方。
We measured neutron spectra in beryllium and an ITER-TBM simulating assemblies by means of a Multi-Foil Activation Method (MFAM) at the FNS facility of JAEA to confirm applicability of MFAM. An unfolding code, NEUPAC, was used to determine neutron flux spectra. Initial guessed neutron spectra were calculated with the Monte Carlo code MCNP4C and a nuclear data library FENDL-2.1. JENDL Dosimetry File 99 was adopted as response data for reaction rates. We deduced neutron flux spectra in the simulated assemblies with the MFAM. From the experiments, it was found out that MFAM gave appropriate results, which indicated that MFAM was a prospect to the application of neutron spectrum measurement in ITER-TBM. However, it was also pointed out that some improvements for measurement of slow neutron below 10 eV were necessary.