Experimental and model development of lead-bismuth eutectic solidification phenomenon flowing inside the tube

IF 3.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Progress in Nuclear Energy Pub Date : 2024-11-29 DOI:10.1016/j.pnucene.2024.105540

Yuan Lanfei, Li Ziang, Wang Chenglong, Qiu Suizheng

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Abstract

Lead-bismuth fast reactor may solidify under accident conditions due to overcooling in components such as steam generators, waste heat exhaust heat exchangers, etc. In order to investigate the impact of the solidified layer adhering to the wall surface on the transient flow heat transfer and pressure drop characteristics of lead-bismuth eutectic, an experimental study of lead-bismuth eutectic solidification phenomenon flowing in a vertical circular tube was conducted. Moreover, a rapid prediction model for lead-bismuth eutectic solidification phenomenon was developed and verified with experimental results. The experimental results demonstrate that the formation of solidification layer results in a reduction in time-averaged Nu by approximately 43%, while concurrently exhibiting a sustained increase in pressure drop of the fluid flow. Additionally, the maximum thickness of the solidification layer on one side is 6.4 mm (inner diameter of the round tube is 20 mm), while the average thickness is 1.97 mm. The findings demonstrate that the formation of the solidification layer not only markedly diminishes the heat transfer efficiency between the lead-bismuth eutectic fluid and the wall but also augments the flow resistance.

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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.