Visualization and measurement of subcooled water jet injection into high-temperature melt by using high-frame -rate neutron radiography

摘要

The dynamic plunging behavior of a subcooled water jet into a pool of molten lead-bismuth alloy, visu- alized and measured using high-frame-rate neutron ra- diography, is described. It is shown that the interactions between water and heavy melt in this geometry differ in several aspects form those in melt injection into water investigated extensively in relation to fuel-coolant inter- actions. The maximum depth of jet penetration is limited by the buoyancy on and the onset of bulk boiling in the water which has collected in a "cavity".