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首页> 外文期刊>Thermal engineering >Measuring Flow and Pressure of Lithium Coolant under Developmental Testing of a High-Temperature Cooling System of a Space Nuclear Power Plant
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Measuring Flow and Pressure of Lithium Coolant under Developmental Testing of a High-Temperature Cooling System of a Space Nuclear Power Plant

机译：在太空核电站高温冷却系统的开发测试下测量锂冷却剂的流量和压力

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摘要

Sub-megawatt space NPP use lithium as a coolant and niobium alloy as a structural material. In order to refine the lithium-niobium technology of the material and design engineering, lithium-niobium loops were worked out in RSC Energia, and they were tested at a working temperature of lithium equal to 1070- 1300 K. In order to measure the lithium flow and pressure, special gauges were developed, which made possible the calibration and checkout of the loops without their dismantling. The paper describes the architecture of the electromagnetic flowmeter and the electromagnetic vibrating-wire pressure transducer (gauge) for lithium coolant in the nuclear power plant cooling systems. The operating principles of these meters are presented. Flowmeters have been developed for channel diameters ranging from 10 to 100 mm, which are capable of measuring lithium flows in the range of 0.1 to 30 L/s with the error of 3% for design calibration and 1 % for volume graduation. The temperature error of the pressure transducers does not exceed 0.4% per 100 K; the nonlinearity and hysteresis of the calibration curve do not exceed 0.3 and 0.4%, respectively. The transducer applications are illustrated by the examples of results obtained from tests on the NPP module mockup and heat pipes of a radiation cooler.
机译：亚兆瓦级空间NPP使用锂作为冷却剂，并使用铌合金作为结构材料。为了完善材料和设计工程中的锂铌技术，在RSC Energia中设计了锂铌环，并在等于1070-1300 K的锂工作温度下对它们进行了测试。流量和压力方面，开发了特殊的压力表，从而可以在不拆卸回路的情况下对回路进行校准和检查。本文介绍了用于核电站冷却系统中锂冷却剂的电磁流量计和电磁振弦式压力传感器（仪表）的体系结构。介绍了这些仪表的工作原理。流量计的通道直径范围为10至100 mm，能够测量锂流量，范围为0.1至30 L / s，设计校准误差为3％，体积刻度误差为1％。压力传感器的温度误差每100 K不超过0.4％；校准曲线的非线性和磁滞分别不超过0.3％和0.4％。通过对NPP模块模型和辐射冷却器的热管进行测试获得的结果示例说明了换能器的应用。

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