Development of dynamic neutron computer tomography for the thermal-hydrauric evaluation of liquid metal, 2; Velocity measurement

Kureta, Masatoshi   ; Kumada, Hiroaki; Kume, Etsuo ; Someya, Satoshi*; Okamoto, Koji*

Development of the Dynamic Neutron Computer Tomography (DNCT) technique is conducted as the new 4D thermal-hydraulic measurement technique in order to provide the detailed database for thermal-hydraulic evaluation methods on liquid metal cooled FBR core. We studied the data analysis method to be realized a velocity measurement by the DNCT, and developed the velocity and locus measurement techniques by expanding the spring model particle trace velocimetry. In this presentation, velocity measurement technique installed in the DNCT analysis system and test results taken at the JRR-4 are reported.