EFFECT OF COATING PROPERTIES ON HEAT TRANSFER DURING COOLING OF HIGH-TEMPERATURE CYLINDRICAL BODIES

PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. SERIES: NUCLEAR AND REACTOR CONSTANTS Pub Date : 2021-12-26 DOI:10.55176/2414-1038-2021-4-195-202

I. Molotova, A. Zabirov, M. Vinogradov, V. Yagov, A. Sorokin

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Abstract

The process of cooling high-temperature bodies in liquids is an important physical process, in particular, for the safety of nuclear plants. After the accident at the Fukushima-1 nuclear power plant in 2011, large-scale research was launched to find a new accident tolerant fuel. Studying the effect of the properties of new materials on heat transfer during cooling in the case of repeated flooding of the active zone and the possibility of accurately predicting the transition temperature to the intensive cooling regime will allow substantiating the choice of a new type of tolerant fuel from the standpoint of thermophysics. The aim of this work was an experimental study of the cooling processes of high-temperature cylindrical bodies made of various metals in liquids, as well as determining the effect of coating properties on heat transfer during cooling. A large experimental data array was obtained on the cooling of cylindrical samples; experiments were carried out on smooth cylinders made of various metals, as well as on copper cylinders with various coatings and different degrees of roughness (gold coating, stainless steel coatings).

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涂层性能对高温圆柱体冷却传热的影响

高温物体在液体中的冷却过程是一个重要的物理过程，特别是对核电站的安全。2011年福岛第一核电站发生事故后，为寻找一种新的耐事故燃料展开了大规模研究。研究新材料的性质对活跃区反复淹水冷却过程中传热的影响，以及准确预测向强化冷却状态转变温度的可能性，将从热物理学的角度证实一种新型耐受性燃料的选择。本工作的目的是对各种金属制成的高温圆柱体在液体中的冷却过程进行实验研究，并确定冷却过程中涂层性能对传热的影响。获得了大量圆柱形试样冷却实验数据;实验在各种金属制成的光滑圆柱体上进行，也在不同涂层和不同粗糙度程度(金涂层、不锈钢涂层)的铜圆柱体上进行。

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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PROBLEMS OF ATOMIC SCIENCE AND TECHNOLOGY. SERIES: NUCLEAR AND REACTOR CONSTANTS

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