Exploring diversion-pathway analysis of a generic molten-salt fast reactor using multiphysics informed signatures

IF 3.2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Progress in Nuclear Energy Pub Date : 2025-09-20 DOI:10.1016/j.pnucene.2025.106047

Samuel Walker , Ryan Stewart , Odera Dim , Emerald Ryan , Carlos Soto , Rodrigo de Oliveira , Parikshit Bajpai , Cihang Lu

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引用次数: 0

Abstract

Multiple commercial ventures are exploring molten-salt reactors due to their inherent safety features, flexibility in fuel sources, high fuel utilization, and thermal efficiency. The continual flow of fuel salt, large quantities of fissile material, and the ability to add or divert material due to the liquid nature of fuel salts introduces new challenges for international safeguards. To understand how international safeguards could most efficiently and effectively be applied, it is important to capture the inherent multiphysics nature of a molten-salt reactor. This work examines a generic molten-salt fast reactor to understand how potential diversion scenarios would affect the concentration of radionuclides in the primary and auxiliary systems. Three types of diversion were examined: protracted uranium diversion of fuel salt, gaseous plutonium extraction, and uranium-metal plating. Five isotopes (with corresponding gamma signatures) were found to be statistically different between the various diversion cases and nominal operations. These isotopes are present during the diversion scenarios and continue to be present during operations afterwards indicating that diversion could be detected throughout operations.

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利用多物理场信息特征对通用熔盐快堆导流路径分析的探索

由于熔盐反应堆固有的安全性、燃料来源的灵活性、高燃料利用率和热效率，许多商业企业正在探索熔盐反应堆。燃料盐的不断流动、大量的裂变材料以及由于燃料盐的液体性质而增加或转移材料的能力给国际保障带来了新的挑战。要了解如何才能最有效地实施国际保障措施，就必须了解熔盐反应堆固有的多物理场性质。这项工作考察了一个通用熔盐快堆，以了解潜在的转移情景如何影响主系统和辅助系统中的放射性核素浓度。研究了三种类型的转移：燃料盐的延期铀转移、气态钚提取和金属铀电镀。五种同位素（具有相应的伽马特征）在各种引水情况和名义操作之间存在统计学差异。这些同位素在导流情景中存在，并在之后的作业中继续存在，这表明在整个作业过程中都可以检测到导流。

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

Progress in Nuclear Energy 工程技术-核科学技术

CiteScore

5.30

自引率

14.80%

发文量

331

审稿时长

3.5 months

期刊介绍： Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.