Flow rundown experiments in a seven pin bundle |
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Authors: | A.J. Brook A. Kaiser W. Peppler |
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Affiliation: | United Kingdom Atomic Energy Authority, Risley, Warrington, U.K.;Institut für Reaktorentwicklung, Gesellschaft für Kernforschung mbH, Postfach 3640, D-7500 Karlsruhe, Federal Republic of Germany |
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Abstract: | A series of experiments has been carried out using an electrically heated seven pin bundle to simulate the conditions under which boiling of the sodium coolant could occur in the event of the loss of power to the circulator pumps of a fast reactor, coincident with a failure of the reactor to trip. Although it was not possible to represent the conditions of the reactor exactly, nor to continue the tests far into dryout, the results nevertheless give valuable qualitative information on the course of boiling development as well as useful quantitative information against which the predictions of computer codes can be checked. In particular, data have been obtained relating to the incidence of superheat, the location and time to dryout of the residual liquid films, the void fraction within the boiling region, and the types of flow regimes which may be expected within different parts of the boiling region at various stages of the transient. |
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