Computational analysis of the dose rates at JSI TRIGA reactor irradiation facilities
Computational analysis of the dose rates at JSI TRIGA reactor irradiation facilities
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DOI：
10.1016/j.apradiso.2017.09.022
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发表时间：
2017-12-01
影响因子：
1.6
通讯作者：
Snoj, L.
中科院分区：
文献类型：
--
作者：
Ambrozic, K.;Zerovnik, G.;Snoj, L.
JSI TRIGA Mark II，IJS研究反应堆配备了许多辐照位置，在那里样品可以被中子和伽马射线辐照。辐照位置的选择取决于其属性，如物理尺寸和可获得性，以及中子和伽马射线能谱、通量和剂量强度。本文介绍了利用蒙特卡罗MCNP软件和ENDF/B-VII.0核数据库计算中子和伽马射线通量、能谱和剂量强度的概况。剂量率以环境剂量当量、空气比释动能和硅剂量当量的形式给出。在全堆功率下，中子环境剂量当量范围为5.5×10(3)Sv h(-1)至6×10(6)Svh(-1)，硅剂量当量范围为6×10(2)Gyh(Si)至3×10(5)Gyh(Si)，中子气比释动能为4.3×10(3)Gyh(-1)至2×10(5)Gyh(-1)，快中子(1 MeV<；E；E)与热中子(E<；)之比为1 MeV<；0.625 eV)范围为1.5x10(-2)至8.4x10(-2)，全堆功率下伽马射线环境剂量当量为3.4x10(3)Syh(-1)至3.6x10(5)Sv h(-1)，伽马空气比释动能范围为3.1x10(3)Gyh(-1)至2.9x10(5)Gyh(-1)。
The JSI TRIGA Mark II, IJS research reactor is equipped with numerous irradiation positions, where samples can be irradiated by neutrons and gamma-rays. Irradiation position selection is based on its properties, such as physical size and accessibility, as well as neutron and gamma-ray spectra, flux and dose intensities. This paper presents an overview on the neutron and gamma-ray fluxes, spectra and dose intensities calculations using Monte Carlo MCNP software and ENDF/B-VII.0 nuclear data libraries.The dose-rates are presented in terms of ambient dose equivalents, air kerma, and silicon dose equivalent. At full reactor power the neutron ambient dose equivalent ranges from 5.5 x 10(3)Sv h(-1) to 6 x 10(6)Svh(-1), silicon dose equivalent from 6 x 10(2)Gy/h(si) to 3 x 10(5)Gy/h(si), and neutron air kerma from 4.3 x 10(3)Gy h(-1) to 2 x 10(5)Gy h(-1) Ratio of fast (1 MeV < E) vs. thermal neutrons (E < 0.625 eV) ranges from 1.5 to 8.4 x 10(-2), gamma ray ambient dose equivalent at full reactor power from 3.4 x 10(3)Sy h(-1) to 3.6 x 10(5)Sv h(-1) and gamma air kerma range 3.1 x 10(3)Gy h(-1) to 2.9 x 10(5)Gy h(-1).