Application of release starting time classification for planning emergency preparedness and response to the hypothetical accident scenario of iPWR-SMR in Thailand

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-10-05 DOI:10.1016/j.nucengdes.2024.113629

Wasin Vechgama , Piyawan Krisanangkura , Kampanart Silva

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引用次数: 0

Abstract

Due to the interest in SMR reactors in newcomer countries, the understanding of the risk of source term release and dose exposure of SMR technology is important scientific data for communicating between the government and people. This study aims to extend the application of release starting time classification of level 2 PSA in SMR technology to inform strategic planning for nuclear consequences and determine size requirements for the emergency planning zones in level 3 PSA. The SBO accident scenario of iPWR at the location in the Ubon Ratchathani province, Thailand, was investigated in this study. The GMM is used to classify the probability density of uneven distributions of release starting times into the two groups. The higher probability density and maximum radioactive release in Group (1) were used to suggest the main plan for emergency response. In the main plan, the local government needs to evacuate the people outside 6 km to avoid dose exposure if source term release is monitored within 8–21 h. The impact of source term release in Group (2) was set as a backup plan for considering an emergency planning extension if the time delay to later than 21 h. Finally, the nuclear consequences of SMRs are compared with large NPPs in the same accident scenarios. SMR technology has the potential to support flexible emergency planning zones for sheltering and evacuation without significant dose exposure to neighboring countries.

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在泰国 iPWR-SMR 假设事故情景中应用释放起始时间分级来制定应急准备和响应计划

由于新兴国家对 SMR 反应堆的兴趣，了解 SMR 技术的源释放风险和剂量暴露是政府与民众沟通的重要科学数据。本研究旨在扩展 2 级 PSA 释放起始时间分类在 SMR 技术中的应用，为核后果战略规划提供依据，并确定 3 级 PSA 应急规划区的规模要求。本研究调查了位于泰国乌汶叻差他尼府的 iPWR 的 SBO 事故情景。利用 GMM 将释放开始时间不均匀分布的概率密度分为两组。第（1）组的概率密度和最大放射性释放量较高，因此被用来建议应急响应的主要计划。在主要方案中，如果监测到源项释放时间在 8-21 h 内，当地政府需要疏散 6 km 以外的人群，以避免剂量照射。最后，将 SMR 与大型核电厂在相同事故情景下的核后果进行了比较。SMR技术有潜力支持灵活的应急规划区，用于掩蔽和疏散，而不会对邻国造成严重的剂量照射。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.