Analysis of thermal detonation experiments by means of a transient multiphase detonation code
In discussions on thermal detonation descriptions of molten fuel/coolant interactions, thermal detonation codes developed at the IKE are applied to a recent experiment performed at the JRC Ispra. In this experiment, 7.5 kg of molten tin at 1348 K were released into a vertical tube of diameter 9.5 cm with a water column of 109 cm height, preheated to 360 K. After triggering from the bottom, pressure waves were propagated upwards through the premixture. The calculations demonstrate that in principle the observed effects can be explained by the theory. A strong, dominating contribution of thermal fragmentation mechanisms had however to be introduced in addition to hydrodynamic breakup. With this a stable detonation wave as well as a quasi-steady case, overdriven due to triggering effects, have been obtained as possible explanations of the experimental results. For the latter case, effects of locally varying premixture data have been studied because of remaining uncertainties in the experimental data.
Bibliographic Reference: Paper presented: Fourth International Topical Meeting on Nuclear Reactor Thermal-Hydraulic, Karlsruhe (DE), Oct. 11-13, 1989
Availability: Available from (1) as Paper EN 34914 ORA
Record Number: 198911140 / Last updated on: 1994-12-01
Original language: en
Available languages: en