Research on the influence of temperature about the measureing performance of lead–bismuth-eutectic electromagnetic flowmeter.

• This paper analyzes factors affecting LBE-EMFM measurement in high-temperature medium. • As temperature rises, magnetic field and wall velocity gradient grow. • An increase in temperature results in reduced linearity and a non-linear decrease in LBE-EMFM sensitivity. • Research findings provide key insights for instrument optimization & online LBE-EMFM calibration. Lead-bismuth-eutectic (LBE) is one of the preferred transmutation targets and coolants for the fourth-generation nuclear reactors. There are complex and interactive factors affecting the flow control of LBE in high temperature operation, which makes it difficult to trace the quantity-value of a lead–bismuth-eutectic electromagnetic flowmeter (LBE-EMFM). In this paper, the measuring characteristics of LBE-EMFM at high temperature are analyzed and studied. The results show that the magnetic field intensity and flow field distribution are the main factors affecting the performance of the flowmeter. With the increase of temperature, the magnetic field intensity and the flow velocity gradient near the measuring tube wall increase, the linearity of LBE-EMFM decreases, and the sensitivity decreases non-linearly. The research of this paper provides an important reference for detecting the flow parameters of LBE and optimizing the performance of LBE-EMFM in the control process of the nuclear industry. [ABSTRACT FROM AUTHOR]