Radiological impact of two hypothetical severe accidents at Arak research reactor

IF 2.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2025-09-02 DOI:10.1016/j.anucene.2025.111844

Hamed Abdollahnejad , Seyyed Sajjad Mousavi , Dariush Rezaei Ochbelagh

引用次数: 0

Abstract

In the context of nuclear safety and emergency preparedness, evaluating the potential radiological consequences of severe reactor accidents is essential. This study assesses the radiological impact of two hypothetical severe accident scenarios at the Arak Research Reactor using the ORIGEN code for source term calculations and the Hotspot model for atmospheric dispersion. The Total Effective Dose Equivalent, accounting for internal and external radiation exposure, was evaluated. Results show that with the reactor building intact, the maximum radiation dose is 2.0E-06 Sv at 350 m, decreasing to 3.0E-09 Sv at 100 km. However, if the building is compromised, the dose increases significantly to 5.0E + 02 Sv under stability class F, with safety thresholds set at 30 km for the public and 4 km for workers. These findings highlight the importance of containment integrity and inform the development of site-specific emergency response strategies for research reactors.

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阿拉克研究反应堆两起假想严重事故的辐射影响

在核安全和应急准备方面，评估严重反应堆事故的潜在辐射后果至关重要。本研究使用ORIGEN代码进行源项计算，使用Hotspot模型进行大气弥散，评估了阿拉克研究堆两种假设的严重事故情景的辐射影响。计算了内照射和外照射的总有效剂量当量。结果表明：在反应堆建筑完好的情况下，350 m处最大辐射剂量为2.0E-06 Sv， 100 km处最大辐射剂量为3.0E-09 Sv；然而，如果建筑物受到破坏，剂量将显著增加到5.0E + 02西沃特（稳定等级F），公众安全阈值为30公里，工作人员安全阈值为4公里。这些发现突出了安全壳完整性的重要性，并为研究堆特定场址应急响应策略的制定提供了信息。

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

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.