Numerical study on the melting behavior of annular fuel under accident conditions

IF 3.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Progress in Nuclear Energy Pub Date : 2024-11-20 DOI:10.1016/j.pnucene.2024.105532

Boxue Wang , Mei Huang , Xiangyuan Meng , Xiaoping Ouyang , Yanping Huang , Hiroshi Matsuda , Chihiro Morita

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Abstract

The use of annular fuel in nuclear power plants has been developed to improve their efficiency, safety, and economic viability. Therefore, studying the thermal hydraulic issues of annular fuel is crucial. The melting of annular fuel under accident conditions is equally important. This study uses a novel numerical technique called the Half Boundary Method (HBM) to tackle this issue. With new variables introduced, this method avoids the need for additional continuity equations at the boundary when solving multi-layer composite problems. First, the HBM is used to model a multi-layer composite ring and solve its transient thermal problems, which are then verified. Next, the temperature distribution of annular fuel under operational conditions is calculated, and the results are compared to validate HBM's accuracy. Based on these findings, simulations are conducted to model the melting phase transitions of annular fuel during Loss of Coolant Accidents (LOCAs) and Reactivity Insertion Accidents (RIAs).

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事故条件下环形燃料熔化行为的数值研究

在核电站中使用环形燃料是为了提高核电站的效率、安全性和经济可行性。因此，研究环形燃料的热液压问题至关重要。事故条件下环形燃料的熔化同样重要。本研究采用了一种名为半边界法（HBM）的新型数值技术来解决这一问题。由于引入了新的变量，该方法在解决多层复合问题时避免了在边界建立额外的连续性方程。首先，使用 HBM 对多层复合材料环进行建模，并解决其瞬态热问题，然后对其进行验证。接着，计算了运行条件下环形燃料的温度分布，并对结果进行了比较，以验证 HBM 的准确性。在这些研究成果的基础上，对环形燃料在失去冷却剂事故（LOCA）和反应性插入事故（RIA）期间的熔化相变进行了模拟建模。

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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.