Aluminium fast neutron leakage spectrum validation

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry Pub Date : 2025-06-07 DOI:10.1016/j.radphyschem.2025.113063

Martin Schulc , Tomáš Czakoj , Evžen Novák , Alena Krechlerová , Adam Greš , Jan Šimon , Bohumil Jánský , Jiří Rejchrt , Zdeněk Matěj , Michal Košťál

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Abstract

Aluminium is a crucial material in the nuclear industry, valued for its reliability over long periods of irradiation. The manuscript focuses on validating aluminium neutron transport libraries. Validation experiments were performed on an aluminium block with a central hole. The block was assembled from smaller aluminium plates. The experiment involved activating samples at different positions and measuring the fast neutron spectrum in the energy range of 0.1 MeV–1.3 MeV by means of a hydrogen-filled proportional detector and in the energy range of 1 MeV–12 MeV using a stilbene scintillation detector. The dosimetric reactions studied for validation included ⁵⁸Ni(n,p)⁵⁸Co, ⁶³Cu(n,γ)⁶⁴Cu, ¹⁸¹Ta(n,γ)¹⁸²Ta, ⁹²Mo(n,p)^92mNb, ^natTi(n,X)⁴⁶Sc, and ^natTi(n,X)⁴⁷Sc. All experimental data were compared with MCNP6.2 simulations using the ENDF/B-VIII.0, JEFF-3.3, and JENDL-5 neutron transport libraries. Activation cross sections were taken from the IRDFF-II library. Regarding activation reactions, the results are in good agreement with simulations, independent on the library. The JEFF-3.3 and ENDF/B-VIII.0 fast neutron flux calculations are similar. All libraries provided results within two sigma uncertainty, except for JENDL-5 in the energy range of 1.8–3.4 MeV, and ENDF/B-VIII.0 (JEFF-3.3) in the region of 1.06–1.3 MeV.

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铝快中子泄漏谱验证

铝是核工业的关键材料，因其在长时间辐照下的可靠性而受到重视。手稿的重点是验证铝中子输运库。在带中心孔的铝块上进行了验证实验。积木是由较小的铝板组装而成的。实验包括在不同位置活化样品，用充氢比例探测器测量0.1 MeV - 1.3 MeV能量范围内的快中子能谱，用二苯乙烯闪烁探测器测量1 MeV - 12 MeV能量范围内的快中子能谱。用于验证的剂量学反应包括58Ni(n,p)58Co、63Cu(n,γ)64Cu、181Ta(n,γ)182Ta、92Mo(n,p)92mNb、natTi(n，X)46Sc和natTi(n，X)47Sc。使用ENDF/B-VIII将所有实验数据与MCNP6.2模拟结果进行比较。0、JEFF-3.3和JENDL-5中子输运库。激活截面取自IRDFF-II文库。对于活化反应，结果与模拟结果吻合较好，与库无关。JEFF-3.3和ENDF/B-VIII。快中子通量的计算是类似的。除了JENDL-5在1.8-3.4 MeV的能量范围内和ENDF/B-VIII.0之外，所有文库的结果都在2西格玛不确定度内（JEFF-3.3）在1.06 ~ 1.3 MeV范围内。

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来源期刊

Radiation Physics and Chemistry 化学-核科学技术

CiteScore

5.60

自引率

17.20%

发文量

574

审稿时长

12 weeks

期刊介绍： Radiation Physics and Chemistry is a multidisciplinary journal that provides a medium for publication of substantial and original papers, reviews, and short communications which focus on research and developments involving ionizing radiation in radiation physics, radiation chemistry and radiation processing. The journal aims to publish papers with significance to an international audience, containing substantial novelty and scientific impact. The Editors reserve the rights to reject, with or without external review, papers that do not meet these criteria. This could include papers that are very similar to previous publications, only with changed target substrates, employed materials, analyzed sites and experimental methods, report results without presenting new insights and/or hypothesis testing, or do not focus on the radiation effects.