抄録
This paper deals with the liquid film dryout and re-wetting behavior under BWR (Boiling Water Reactor) condition. The re-wetting behavior has not been made fully clear. Therefore, the transient BT (Boiling Transition) tests performed with BWR fuel moke-up bundle. 12 thermo-couples were installed in one of heater rods at same radial direction. The test results showed that the BT firstly occurred at just upstream of the spacer, then, BT propagates to upstream, and finally rewetting occurred from upstream at each interval of the spacers. It was also found that the re-wetting propagation velocity depends on the wall super heat temperature.
