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Corrosion of Materials by Liquid NaK Coolant in a Nuclear Power System

机译:核动力系统中液态NaK冷却剂对材料的腐蚀

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摘要

Corrosion of the primary coolant structural materials in a nuclear power system is a potential concern when liquid metal is used as the coolant. For the current space reactor design, liquid sodium-potassium eutectic (NaK) has been selected as a candidate for the primary coolant and stainless steel as the structural material, so whether or not corrosion is a problem for this system must be determined. This paper documents a first step to understanding the extent of corrosion in the selected candidate design. Data available in the literature have been compiled and are analyzed, factors affecting corrosion are assessed, and a theoretical basis of the corrosion mechanisms by liquid metals is presented. This study provides some useful information for the design of NaK coolant systems and some recommendations for what additional experimental and theoretical work is needed to understand the corrosion mechanisms and limitations of using NaK as a primary coolant.
机译:当使用液态金属作为冷却剂时,核动力系统中主要冷却剂结构材料的腐蚀是一个潜在的问题。对于当前的空间反应堆设计,已选择液态钠钾共晶(NaK)作为主要冷却剂的候选材料,并选择不锈钢作为结构材料,因此必须确定该系统是否存在腐蚀问题。本文记录了了解所选候选设计腐蚀程度的第一步。已汇编并分析了文献中的可用数据,评估了影响腐蚀的因素,并提出了液态金属腐蚀机理的理论基础。这项研究为NaK冷却剂系统的设计提供了一些有用的信息,并为需要更多的实验和理论工作提供一些建议,以了解使用NaK作为主要冷却剂的腐蚀机理和局限性。

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