In the electrical pin burst facility of the GfK, out-of-pile experiments are performed to simulate the in-pile behavior of fuel pins under SNR-300 accident conditions. Preliminary results of the first experimental series indicate that failure phenomena such as cladding meltdown, fuel melting, and fuel motion, and failure times can be studied by the method of the direct electrical heated UO2 pin in a satisfactory and reproducible manner. Theory and experimental results will be compared at a later time with the computer program VESUV.