Experiment and analysis on natural convection characteristics in the experimental fast reactor joyo

Development of natural circulation analysis methods for a sodium cooled fast reactor

“…One-dimensional flow network analysis models have widely been used for safety analyses of SFR plants because of simplicity and easiness of handling, and one has been applied to the safety analysis for licensing of the Japanese prototype SFR, MONJU [2]. Therefore the one-dimensional flow network model is expected to be applied to future licensing of the SFR with NC-DHRS, but applicability of existing one-dimensional flow network analysis models has not been sufficiently confirmed for the SFR.…”

“…The three-dimensional fluid flow analysis method can also evaluate the scale effect due to the difference of dimensions between the SFR and the validation test, because it can exactly deal with the geometry and has the turbulent models as well. The one-dimensional safety analysis method is planned to be incorporated into statistical safety evaluation [2,4] because of its fast running time. Moreover, both the one-dimensional safety analysis method and three-dimensional fluid flow analysis method have been validated using the test results of a 1/10-scale water test [5] and a 1/7-scale sodium test [6] for five typical transient events selected from the design basis events (DBE) of the SFR.…”