Monte Carlo dosimetry for a EURADOS WG 10 and RENEB field test of retrospective dosimetry techniques in realistic exposure scenarios

IF 1.6 3区物理与天体物理 Q2 NUCLEAR SCIENCE & TECHNOLOGY

Radiation Measurements Pub Date : 2024-11-09 DOI:10.1016/j.radmeas.2024.107329

Hyoungtaek Kim , Min Chae Kim , Olivier Van Hoey , Jonathan Simon Eakins , Hyungjoon Yu , Hanjin Lee , Michael Discher , Jungil Lee , Lovisa Waldner , Clemens Woda , Francois Trompier , Céline Bassinet , Sergey Sholom , S.W.S. McKeever , Elizabeth A. Ainsbury

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Abstract

Computational dosimetry using Monte Carlo radiation transport simulations was applied for the 2019 European Radiation Dosimetry Group (EURADOS) and Running the European Network of Biological and retrospective Physical dosimetry (RENEB) field test, an exercise of retrospective dosimetry techniques for a realistic small-scale radiological accident. The simulations were performed at four institutes, using different codes and computerized anthropomorphic phantoms. Four exposure scenarios using Ir-192 were modeled: relatively homogeneous in a predominantly AP direction, heterogeneous in a predominantly anterior-posterior (AP) and left-lateral (LLAT) direction, and partially shielded. The items for dosimetry, such as mobile phones, blood tubes, and surface dosimeters, were designed and located based on the experimental pictures. Absorbed doses of dosimeters, such as thermoluminescence dosimeter (TLD), optically stimulated luminescence dosimeters (OSLD), radio-photoluminescence dosimeters (RPLD), and display glasses, inside and outside the phantoms were calculated and compared to the measured doses. In addition, photon energy spectra were calculated at different locations to correct the energy responses of the materials. The simulation results from the four institutes showed agreement with each other, showing an average relative difference of less than 14%. The Pearson's R-values for the linear fitting of the measured and calculated data ranged from 0.95965 to 0.68714, depending on the exposure scenario and institutes. Finally, the accuracy and limitations of the calculation techniques for the given exposure structures are discussed.

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为欧洲放射剂量评估系统第 10 工作组和 RENEB 在实际照射情况下对追溯剂量测定技术进行的蒙特卡洛剂量测定实地测试

利用蒙特卡洛辐射传输模拟进行的计算剂量学应用于 2019 年欧洲辐射剂量学小组（EURADOS）和运行欧洲生物和回顾性物理剂量学网络（RENEB）的实地测试，这是一次针对真实小规模辐射事故的回顾性剂量学技术演习。模拟在四个机构进行，使用不同的代码和计算机化的拟人化模型。模拟了四种使用 Ir-192 的照射情况：以 AP 方向为主的相对均质照射、以前后（AP）和左侧（LLAT）方向为主的异质照射以及部分屏蔽照射。手机、血管和表面剂量计等剂量测定物品是根据实验图片设计和定位的。计算了热释光剂量计（TLD）、光刺激发光剂量计（OSLD）、无线电-光致发光剂量计（RPLD）和显示眼镜等剂量计在模型内外的吸收剂量，并与测量剂量进行了比较。此外，还计算了不同位置的光子能量谱，以校正材料的能量响应。四个研究所的模拟结果显示彼此一致，平均相对差异小于 14%。测量数据和计算数据线性拟合的皮尔逊 R 值介于 0.95965 到 0.68714 之间，具体取决于暴露情况和研究所。最后，讨论了针对特定暴露结构的计算技术的准确性和局限性。

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 Measurements 工程技术-核科学技术

CiteScore

4.10

自引率

20.00%

发文量

116

审稿时长

48 days

期刊介绍： The journal seeks to publish papers that present advances in the following areas: spontaneous and stimulated luminescence (including scintillating materials, thermoluminescence, and optically stimulated luminescence); electron spin resonance of natural and synthetic materials; the physics, design and performance of radiation measurements (including computational modelling such as electronic transport simulations); the novel basic aspects of radiation measurement in medical physics. Studies of energy-transfer phenomena, track physics and microdosimetry are also of interest to the journal. Applications relevant to the journal, particularly where they present novel detection techniques, novel analytical approaches or novel materials, include: personal dosimetry (including dosimetric quantities, active/electronic and passive monitoring techniques for photon, neutron and charged-particle exposures); environmental dosimetry (including methodological advances and predictive models related to radon, but generally excluding local survey results of radon where the main aim is to establish the radiation risk to populations); cosmic and high-energy radiation measurements (including dosimetry, space radiation effects, and single event upsets); dosimetry-based archaeological and Quaternary dating; dosimetry-based approaches to thermochronometry; accident and retrospective dosimetry (including activation detectors), and dosimetry and measurements related to medical applications.