Contactless Flowrate Sensors for NA, PBBI and PB Flows
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
F5-1 Instrumentation Technique

Dominique Buchenau (HZDR)
Gunter Gerbeth (Helmholtz-Zentrum Dresden-Rossendorf)
Janis Priede (Coventry University)


Accurate and reliable flow rate measurements are required for various liquid metal systems such as the Na or Lead-flows in fast reactors, the PbBi-flows in transmutation systems, or the flows in liquid metal targets. For liquid metal flows, a contactless measurement is preferable. In this paper we report on the recent development of two types of such flow meters. The former operates by detecting the flow-induced disturbance in the phase distribution of an externally applied AC magnetic field. Such a phase-shift flow meter was developed with an emitting coil at one side of the duct and two sensing coils at the opposite side. The second approach uses a rotatable single cylindrical permanent magnet, which is placed close to the liquid metal duct. The rotation rate of this magnet is proportional to the flow rate.

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