Feasibility study for establishing a linear and wide range neutron dosimetry field based on MNSR neutron radiography beamline

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL Radiation Physics and Chemistry Pub Date : 2025-01-25 DOI:10.1016/j.radphyschem.2025.112562

Afrouz Asgari , Seyed Abolfazl Hosseini , Mohammad Hosein Choopan Dastjerdi , Javad Mokhtari

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Abstract

This study investigated the possibility of establishing a linear neutron dosimetry field by using reactor power changes at the Isfahan miniature neutron source reactor (MNSR). In this way, the linear response of the instrument indicating the reactor power has been assessed using reactor power changes. The linear response of the instrument indicating the reactor power, i.e., the fission chamber (FC) neutron detectors in the reactor core, was investigated experimentally using out-of-core dosimetry by both active and passive dosimeters. The results showed that the FC neutron detectors used in MNSR displayed a linear and consistent response in indicating a power range of 1.5 W–30 kW that is equal to the neutron dose range from 0.5 μSv/h to 9.5 mSv/h at the outlet of the neutron beamline. Consequently, it can be concluded that the MNSR beamline is suitable for establishing a linear and wide dosimetry field.

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基于微核磁共振中子射线照相束线建立线性宽范围中子剂量测量场的可行性研究

本研究探讨了在伊斯法罕微型中子源反应堆（MNSR）上利用反应堆功率变化建立线性中子剂量场的可能性。这样，指示反应堆功率的仪器的线性响应已经使用反应堆功率变化进行了评估。采用主动剂量计和被动剂量计对指示反应堆功率的仪器，即堆芯中的裂变室（FC）中子探测器的线性响应进行了实验研究。结果表明，在中子束线出口0.5 μSv/h ~ 9.5 mSv/h的中子剂量范围内，在1.5 w ~ 30 kW的功率范围内，FC中子探测器表现出线性一致的响应。因此，可以得出结论，小波吸收束线适合于建立线性宽剂量场。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.