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Report No.

Demonstration of eddy current type flow meter in Monju

Aizawa, Kosuke ; Chikazawa, Yoshitaka  ; Morohashi, Yuko 

Temperature and flow rate measurement of each fuel subassembly outlet is effective to detect loss of coolant accident (LOCA) and reactivity initiated accident (RIA) early and to understand a thermal hydrodynamic performance in liquid metal fast breeder reactor (LMFBR). This report shows the data of eddy current type flow meters in Monju. High linearity between the signal intensity of each eddy current type flow meter and flow rate of primary sodium was obtained in the flow rate condition of 10$$sim$$100%. In addition, the linearity was also demonstrated in the low velocity region, approx. 0.25 m/s. Fluctuation shown on each eddy current type flow meter was below 0.2 m/s, which is 5 % of the time averaged velocity at the rated condition. Those experimental results show that the eddy current type flow meter can detect the change of relative flow rate.



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