The characteristic operational features of different flowmeters and devices for measuring the coolant and feedwater flows in the loops of nuclear steam generating facilities (NSGF) currently operating in NPP are analyzed. A new design has been developed for labeled nuclear-magnetic flowmeter-relaxometers with a new flow measuring regime. This regime and other new structural solutions in the new devices have made it possible to perform measurements with accuracy to within <1%. The results of measurements of the flow and the longitudinal and transverse relaxation times for different fl owing media at different temperatures are presented. It is shown that the developed labeled nuclear-magnetic flowmeter-relaxometer is an expedient tool for monitoring the parameters of the coolant and feedwater in the NSGF loops.

中文翻译：

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核磁流量计-松弛计，用于监测 Npp 中的冷却剂和给水流量和状态

分析了目前在核电厂运行的核蒸汽发生设施 (NSGF) 回路中用于测量冷却剂和给水流量的不同流量计和装置的运行特征。已开发出一种新设计，用于带有新流量测量机制的标记核磁流量计-弛豫计。这种机制和新设备中的其他新结构解决方案使得以<1% 的精度进行测量成为可能。给出了不同温度下不同流动介质的流动以及纵向和横向弛豫时间的测量结果。结果表明，开发的标记核磁流量计松弛计是监测 NSGF 回路中冷却剂和给水参数的便利工具。