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Furuhashi, Ichiro*; ; Imazu, Akira
PNC TN9410 87-158, 231 Pages, 1987/11
Simplified analyses of discontinuity thermal stresses were performed using axisymmetrical shell theory for the purpose of saving cost and time of thermal stress calculations in the design of FBR's components. By these analyses, steady and unsteady thermal stresses are to be calculated easily and quickly for the following regions (1)edge of cylinder, (2)discontinuity of material properties and thickness, dissimilar metal pipe joint, (3)axial temperature distribution, cylinder near the liquid surface level, (4)junction of vessel & flange, (5)junction of nozzle and vessel, (6)skirt structures, nozzle safe end, and (7)ring reinforcement. Also, simple formulae were proposed for estimating thermal stresses caused by (9)circumferential temperature distribution of cylinder, (10)thermal striping near the structural wall. By using these results, one can easily evaluate thermal stresses for various shapes and dimensions, and saving of cost and time should be accomplished in the design of FBR's components.
; Furuhashi, Ichiro*; Imazu, Akira
PNC TN9410 87-094, 402 Pages, 1987/06
This report describes flexibility, simplified stress calculation method and simple axisymmetrical modelling method for nozzles which were designed for large EBRs based on the IHX floating support concept. Stress analyses of nozzles were conducted with 3-dimensional solid model etc. under piping reaction force, internal pressure and thermal transient loadings by finite element FINAS code. The results of analyses are as follows; (1)Spring constants representing nozzle flexibility were prepared for piping analyses from the results of 3-dimensional shell analyses, (2)For internal pressure, an equivalent axial force was applicable in piping analyses, (3)Thermal transient loadings of 1 C/sec temperature change caused higher stress than allowable limit, so more discussion is needed in thermal design of the FBRs, (4)Simplified stress calculation methods for each loading were developed, (5)Analytical modelling of 3-dimensional nozzle shapes to axisymmetrical shapes was developed for each loading.
; Furuhashi, Ichiro*; Imazu, Akira
PNC TN9410 87-028, 209 Pages, 1987/02
The thermal stresses are generated in the walls of chemical plants, thermal power plants, and fast breeder reactors, etc. during start-up or shut-down of plants or during emergency shut-down. Parametric structural analyses will be required in the structural design of these plants to demonstrate that these thermal stresses are lower than allowable values. This report gives diagrams for calculating thermal stresses due to temperature distribution in wall thickness for various thermal parameters. We can get thermal stresses quickly by these diagrams without parameteric structural analyses. These diagrams can be most effectively applied for choosing the most desirable geometries at the initial stage of the design, even though they are not recommended to be used for the different types of thermal stresses caused by temperature distribution in axial direction of pipings and vessels.
Furuhashi, Akira;
JAERI 1080, 61 Pages, 1965/07
no abstracts in English
Furuhashi, Akira
Journal of Nuclear Science and Technology, 1(4), p.120 - 129, 1964/00
no abstracts in English
; Furuhashi, Akira
Nihon Genshiryoku Gakkai-Shi, 5(2), p.119 - 126, 1963/00
no abstracts in English
Hirota, Jitsuya; Kuroi, Hideo; Goto, Yorio; Furuhashi, Akira; Yasuno, Takehiko; Yamamoto, Ken; Mitani, Hiroshi; Obu, Makoto; Ichimori, Toshihiro; Koyama, Kinji; et al.
JAERI 1034, 50 Pages, 1962/08
no abstracts in English
Furuhashi, Akira
Nihon Genshiryoku Gakkai-Shi, 4(10), p.677 - 684, 1962/00
no abstracts in English
Furuhashi, Akira
Nihon Genshiryoku Gakkai-Shi, 4(11), p.797 - 807, 1962/00
no abstracts in English
Sugimoto, Asao; Takeda; Furuhashi, Akira; Katsuragi, Satoru; Hirota, Jitsuya; Naito, Keiji; Kondo, Yasuko; Nagasaki, Ryukichi; Yamazaki, Yasaburo; Kuroi, Hideo; et al.
JAERI 4018, 52 Pages, 1961/06
no abstracts in English
Furuhashi, Akira; *;
Nihon Genshiryoku Gakkai-Shi, 2(7), P. 394, 1960/00
no abstracts in English
; Furuhashi, Akira; ; ; ;
Dai-3-Kai Genshiryoku Shimpojiumu Hobunshu, 1, P. 88, 1959/00
no abstracts in English
Furuhashi, Akira;
Dai-3-Kai Genshiryoku Shimpojiumu Hobunshu, 2, P. 249, 1959/00
no abstracts in English
; Furuhashi, Akira
Dai-2-Kai Genshiryoku Shimpojiumu Hobunshu, P. 80, 1958/00
no abstracts in English