N. Takenaka et al., 3-DIMENSIONAL VOID FRACTION MEASUREMENT OF 2-PHASE FLOW IN A ROD BUNDLE BY NEUTRON RADIOGRAPHY, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 377(1), 1996, pp. 115-118
Three-dimensional void fraction distribution and one-dimensional cross
-sectional averaged void fraction distribution of air-water two-phase
flow in a 4 x 4 rod bundle near a spacer was measured by neutron radio
graphy using a CT method. Two-phase flow behavior in the rod bundle ne
ar the spacer, which is important to study from the safety considerati
ons of nuclear reactors and which is difficult to observe by other met
hods, was clearly visualized.