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Brear, D. J.*; Kondo, Satoru; Sogabe, Joji; Tobita, Yoshiharu*; Kamiyama, Kenji
JAEA-Research 2024-009, 134 Pages, 2024/10
JAEA-Research-2024-009.pdf:2.45MB
The SIMMER-III/SIMMER-IV computer codes are being used for liquid-metal fast reactor (LMFR) core disruptive accident (CDA) analysis. The sequence of events predicted in a CDA is often influenced by the heat exchanges between LMFR materials, which are controlled by heat transfer coefficients (HTCs) in the respective materials. The mass transfer processes of melting and freezing, and vaporization and condensation are also controlled by HTCs. The complexities in determining HTCs in a multi-component and multi-phase system are the number of HTCs to be defined at binary contact areas of a fluid with other fluids and structure surfaces, and the modes of heat transfer taking into account different flow topologies representing flow regimes with and without structure. As a result, dozens of HTCs are evaluated in each mesh cell for the heat and mass transfer calculations. This report describes the role of HTCs in SIMMER-III/SIMMER-IV, the heat transfer correlations implemented and the calculation of HTCs in all topologies in multi-component, multi-phase flows. A complete description of the physical basis of HTCs and available experimental correlations is contained in Appendices to this report. The major achievement of the code assessment program conducted in parallel with code development is summarized with respect to HTC modeling to demonstrate that the coding is reliable and that the model is applicable to various multi-phase problems with and without reactor materials.
Mori, Yuki*; Kato, Sayuri*; Mori, Hiroko*; Katayama, Yoshinori; Tsuji, Kazuhiko*
Review of High Pressure Science and Technology, 7, p.353 - 355, 1998/03
The temperature dependence of phase transitions in GaSb, AlSb, GaAs, GaP, InAs, ZnSe, and CdTe are studied by X-ray diffraction measurements under pressure upto 30 GPa at temperatures of 90-300K. The phase transitions depend on paths in a pressure-temperature phase diagram. The structure of the recovered phase after decompression depends on the ionicity in bonding: amorphous for small ionicity, the stable zincblende structure for large ionicity, and microcrystalline or moderate ionicity. These results are discussed by using a configuration-coordinate model.
Konno, Chikara; Oyama, Yukio; Ikeda, Yujiro; Kosako, Kazuaki*; Maekawa, Hiroshi; Nakamura, Tomoo; A.Kumar*; M.Z.Youssef*; M.A.Abdou*; Bennett, E. F.*
Fusion Technology, 19(3), p.1885 - 1890, 1991/05
no abstracts in English
Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Maekawa, Hiroshi; Kosako, Kazuaki*; Nakamura, Tomoo; A.Kumar*; M.Youssef*; M.Abdou*; E.Bennett*
Fusion Technology, 19(3), p.1879 - 1884, 1991/05
no abstracts in English
Oyama, Yukio; Kosako, Kazuaki*; Nakagawa, Masayuki; Nakamura, Tomoo
Fusion Engineering and Design, 18, p.281 - 286, 1991/00
Times Cited Count：5 Percentile：53.27(Nuclear Science & Technology)no abstracts in English
Oyama, Yukio; Konno, Chikara; Ikeda, Yujiro; Maekawa, Hiroshi; Maekawa, Fujio; Kosako, Kazuaki*; Nakamura, Tomoo; A.Kumar*; M.Z.Youssef*; M.A.Abdou*; et al.
Fusion Engineering and Design, 18, p.203 - 208, 1991/00
Times Cited Count：17 Percentile：83.57(Nuclear Science & Technology)no abstracts in English
; ; ; Tasaka, Kanji
Journal of Nuclear Science and Technology, 25(2), p.143 - 152, 1988/02
no abstracts in English
; ; Tasaka, Kanji
JAERI-M 9621, 116 Pages, 1981/08
no abstracts in English
; Tasaka, Kanji
JAERI-M 9476, 60 Pages, 1981/05
no abstracts in English
