Abstract
A number of studies of the radiological consequences of notional accidental releases from Fast Breeder Reactors (FBR) and their sensitivity to variation in the values of several important parameters have recently been undertaken in the United Kingdom. The basic features of these studies and their main conclusions are summarized in this article. Several aspects were considered including the influence of: an enhanced release of the less volatile elements (e.g., plutonium, americium) relative to those for a release from molten fuel; the physical and chemical forms of the released aerosol and in particular the release of a mixed sodium-element aerosol; the dose-effect relationships for early biological effects and the meteorological conditions at the time of the release. The possibility of significantly increased consequences (relative to those for a release from molten fuel) has been suggested for circumstances in which there is an enhanced release of the less volatile elements and release of a sodium-element aerosol; the results of this work do not substantiate these suggestions.
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