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Morita, Koji*; Guo, L.*; Zhang, B.*; Tagami, Hirotaka; Tobita, Yoshiharu
no journal, ,
no abstracts in English
Ohara, Yohei*; Fujimoto, Takuya*; Nishida, Satoshi*; Morita, Koji*; Guo, L.*; Tagami, Hirotaka; Suzuki, Toru
no journal, ,
In order to assess sedimentation behavior of fuel debris during core disruptive accidents in sodium-cooled fast reactors, a three-dimensional particle-grid coupled method was developed. Through the analyses of basic experiments on the sedimentation behavior of solid particles, fundamental adequacy of the modeling approach was confirmed.
Ogawa, Toru
no journal, ,
Fuel debris after post accident has wide-ranging characters depending on the accident progression paths. Their physical forms should also vary due to retrieval methods. With those changing variables, proper management methods have to be selected. Besides, the long-term alterations of fuel debris have to be considered. In the analytical system, DEM (discrete element method) is applied to simulate water-containing debris of arbitrary particle-size distribution. Monte Carlo particle transportation analysis is applied before and after water draining. The simulation can be made for both experimental