The Calibration and Stability of a 1200°F Permanent Magnet In-Core Sodium Flowmeter

A previously described, permanent magnet (PM), in-core flowmeter for use in sodium cooled reactors has been fabricated and installed in the Argonne National Laboratory (ANL) Sodium Flowmeter Calibration Loop. The calibration test facility and procedures are described and a typical family of flowmeter calibration curves are presented. The measured sensitivity is compared to that theoretically predicted and the discrepancies are discussed. Long term performance of the flowmeter is discussed.