Liquid entrainment by an expanding core disruptive accident bubble-a Kelvin/Helmholtz phenomenon

摘要

the final stage of a postulated energetic core disruptive accident (CDA) in a liquid metal fast breeder reactor is believed to involve the expansion of a high-pressure core-materials bubble against the overlying pool of sodium. Some of the sodium will be entrained by the CDA bubble which may influence the mechanical energy available for damage to the reactor vessel. The following considerations of liquid surface instability indicate that the Kelvin-Helmholtz (K-H) mechanism is primarily responsible for liquid entrainment by the expanding CDA bubble.