Characteristics of permanent magnet type small-size sodium flow meters

not registered; not registered; Takeda, Kunio; not registered; Atsumo, Hideo

Three permanent magnet type small-size sodium flow meters which were installed in General Purpose Sodium Test Loop have been used in sodium for about ten thousand hours. Based on the data obtained in this periods, the characteristics of these flow meters were checked about the effect of sodium tamperature and elapsed time. Flowing results were obtained. (1)Good linearity was observed between output voltage and flow rate. (2)The output voltage of these flow meters were from 77% to 92% of the designed value. (3)The output voltage decreased as sodium temperature increased and the rate was nearly equal to the calculated value (-0.009 %/C). (4)Output voltage decrease with elapsed time was not observed.