Abstract
The phenomenon and mechanism of Fuel Coolant Interaction (FCI) has been widely studied around the world in the past few decades. A series of experiments were performed and several FCI models were developed based on these experiments. However, there are still large uncertainties in the models of FCI and limitations to predict FCI process, especially the reactor scale process. A new FCI experimental facility is designed and further experiments are performed by Shanghai Jiao Tong University, China. The photography of FCI process are obtained by two high-speed cameras, recording from two different directions vertical to each other. Water level changed can also be get from images of FCI process. Pressure peak produced by intense interaction can also be recorded. To discuss the influence of different factors for FCI, numbers of variables are considered in these experiments, including jet material, melt temperature, coolant type, coolant subcooled temperature, release height, break size and interaction pool size. A series of tests in low melt temperature (400℃ to 1600℃) has been performed and a batch of results are obtained. Primary analysis is carried out based on these latest experimental results. The phenomenon of quenching and steam explosion are shown in this paper. Influence of melt temperature and material are discussed. Further and deeper study about kinds of influence factors to FCI needed to be carried out later.
