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Matsuba, Kenichi; Isozaki, Mikio; Kamiyama, Kenji; Suzuki, Toru; Tobita, Yoshiharu
Proceedings of 11th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Operation and Safety (NUTHOS-11) (USB Flash Drive), 8 Pages, 2016/10
In order to evaluate the distance for fragmentation of molten core material discharged into the lower sodium plenum during core disruptive accidents in sodium-cooled fast reactors, experiments with simulated molten materials and coolants (water, sodium) was carried out, where an empirical correlation of the distance for fragmentation was developed. The empirical correlation developed by this study showed a good agreement with the measurement results obtained by the present experiments. It was found that in order to well-predict the distance for fragmentation in sodium, thermal phenomena, such as sodium boiling and resultant vapor expansion, needed to be considered.
; Koizumi, Yasuo; ; Osakabe, Masahiro; Tasaka, Kanji
Nucl.Eng.Des., 96, p.81 - 94, 1986/00
Times Cited Count：3 Percentile：40.87(Nuclear Science & Technology)no abstracts in English
Son, E.*; Sheikh, Md. A. R.*; Matsumoto, Tatsuya*; Morita, Koji*; Matsuba, Kenichi; Toyooka, Junichi; Tagami, Hirotaka; Kamiyama, Kenji
no journal, ,
To clarify the sedimentation behavior of fuel debris particles formed by molten fuel-coolant interaction in core disruptive accidents of sodium-cooled fast reactors, experiments pouring mixed particles simulating fuel debris into a water pool were conducted. In the experiments, effects of experimental parameters on the characteristics of particle bed formation were investigated. Based on the results of the experiments, an empirical correlation to predict quantitatively the center height of the bed composed of mixed particles with different sizes was developed. Bed height predicted using the correlation agreed well with the experimental results. Applicability of the developed correlation to the prediction of the center height of the bed composed of mixed particles with different sizes was confirmed.
