Experimental study of the hydrodynamic characteristics of the coolant flow at the outlet of the fuel assembly for the RITM nuclear icebreaker reactor

IF 0.4 4区工程技术 Q4 NUCLEAR SCIENCE & TECHNOLOGY

Atomic Energy Pub Date : 2024-09-16 DOI:10.1007/s10512-024-01130-7

S. M. Dmitriev, T. D. Demkina, A. A. Dobrov, D. V. Doronkov, D. S. Doronkova, D. D. Kuritsin, A. N. Pronin, A. V. Ryazanov

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Abstract

The paper presents experimentally determined hydrodynamic characteristics of the coolant flow at the outlet of the RITM nuclear icebreaker reactor fuel assembly. The studies were carried out according to Pitot tube measurements based on the theory of hydrodynamic similarity using a model of the fuel assembly outlet with an air working medium. Friction factors were determined for several sections located at the outlet of the fuel assembly. The distribution of the hydrodynamic characteristics of the coolant flow is visualized by cartograms of the axial velocity at the outlet of the fuel rod bundle, in the wide and narrow parts of the nozzle, as well as in the fragments of drain windows in the upper base plate. The flow of the coolant through the central displacer and pipe for conducting the coolant to the resistance thermometer is determined. According to the performed studies, the asymmetric nozzle, coolant sampling pipe of the resistance thermometer, and upper base plate are the essential parameters affecting the formation of the field structure for the axial flow velocity.

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RITM 破冰船核反应堆燃料组件出口冷却剂流体力学特性实验研究

本文介绍了通过实验确定的 RITM 核破冰船反应堆燃料组件出口处冷却剂流的流体力学特性。研究是根据皮托管测量结果进行的，以流体力学相似性理论为基础，使用带有空气工作介质的燃料组件出口模型。对位于燃料组件出口的几个部分的摩擦系数进行了测定。通过燃料棒束出口处、喷嘴的宽窄部分以及上底板排水窗口碎片的轴向速度制图，可以直观地看出冷却剂流的流体力学分布特征。还测定了冷却剂流经中央置换器和用于将冷却剂导入电阻温度计的管道的情况。根据研究结果，非对称喷嘴、电阻温度计的冷却剂取样管和上底板是影响轴向流速场结构形成的重要参数。

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

Atomic Energy 工程技术-核科学技术

CiteScore

1.00

自引率

20.00%

发文量

100

审稿时长

4-8 weeks

期刊介绍： Atomic Energy publishes papers and review articles dealing with the latest developments in the peaceful uses of atomic energy. Topics include nuclear chemistry and physics, plasma physics, accelerator characteristics, reactor economics and engineering, applications of isotopes, and radiation monitoring and safety.