Tichý Miloš, Huml Ondřej, Bílý Tomáš, Losa Evžen, Novák Evžen, Jánský Bohumil, Rejchrt Jiří
Department of Nuclear Reactors, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, V Holešovičkách 747/2, 180 00, Prague 8, Czech Republic.
Department of Laboratory Operation, Research Centre Řež, Hlavní 130, 250 68, Řež, Czech Republic.
Appl Radiat Isot. 2024 Dec;214:111552. doi: 10.1016/j.apradiso.2024.111552. Epub 2024 Oct 18.
The neutron spectrum was measured at two locations in the spent fuel storage facility of the Temelín nuclear power plant. The measurement had two primary objectives: to map the neutron -γ field by quantifying the ambient dose equivalent H∗(10) and to identify methods that could improve the quality of the adjusted neutron spectrum using a Bonner Sphere Spectrometer (BSS). Three spectrometers were used: a BSS and two proton recoil spectrometers. Hydrogen-filled proportional counters and an EJ309 scintillator were used to construct the a priori spectrum for BSS adjustment. The details of this process and its results are discussed. The a posteriori spectrum was used to calculate the ambient dose equivalent H∗(10). The resulting spectrum is highly thermalised, but the predominant contribution to H∗(10) was in the 100 keV-1.3 MeV range. The use of hydrogen-proportional counters in combination with the BSS is recommended.
在特梅林核电站乏燃料储存设施的两个位置测量了中子能谱。该测量有两个主要目标：通过量化环境剂量当量H∗(10)来绘制中子 - γ场图，并确定使用邦纳球谱仪（BSS）可以提高调整后的中子能谱质量的方法。使用了三台谱仪：一台BSS和两台质子反冲谱仪。充氢正比计数器和一个EJ309闪烁体用于构建用于BSS调整的先验能谱。讨论了该过程的细节及其结果。后验能谱用于计算环境剂量当量H∗(10)。所得能谱高度热化，但对H∗(10)的主要贡献在100 keV - 1.3 MeV范围内。建议将氢正比计数器与BSS结合使用。
