Abstract
In the course of fast reactor safety studies various problems associated with the transient boiling of liquid metals have arisen. Some of these of general interest, associated with nucleation, bubble growth and channel voiding, are discussed here. The differences between the behaviour of liquid metals and water are emphasized, and in particular the effects of dissolved gas and ionizing radiation are dealt with. An approximate method of calculating the rate of growth of a vapour bubble is described, which includes the effects of inertia, heat transfer and surface tension. This is applied to the voiding by boiling of a blocked reactor coolant channel.
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