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Report No.

Experimental study on fragmentation behavior of molten core material during core disruptive accident for sodium-cooled fast reactors; Discussion on the fragmentation mechanism

Matsuba, Kenichi  ; Kamiyama, Kenji ; Tobita, Yoshiharu; Toyoka, Junichi  ; Zuev, V.*; Kolodeshnikov, A.*; Vasilyev, Y.*

In order to obtain experimental knowledge on fragmentation behavior of molten core material discharged into the lower sodium plenum in the reactor vessel during core disruptive accidents of sodium cooled fast reactors, a series of fragmentation experiments have been carried out with a molten oxide. Based on the experimental results, dominant mechanisms for the fragmentation behavior was discussed.



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