Dynamic behavior of rapsodie in exceptional transient experiments

In March and April, 1983, a series of experiments on large transients was performed on the sodium cooled fast reactor RAPSODIE at Cadarache. The main objectives of this program are an increase of existing knowledge on physical phenomena under transient conditions providing additional elements concerning verification of physical models and validation of codes relevant to analysis of incidental and accidental fast reactor behavior. The interpretation of these experiments, covering a wide range from full power and flow down to decay power and natural circulation conditions, has been applied to core dynamic behavior and transient thermohydraulics in primary and secondary circuits of the installation