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Journal Articles

A Comparative CFD exercise on bubble hydrodynamics using Euler-Euler and interface tracking approaches

Dehbi, A.*; Cheng, X.*; Liao, Y.*; Okagaki, Yuria; Pellegrini, M.*

Proceedings of 19th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-19) (Internet), 15 Pages, 2022/03

Journal Articles

A New comparison of marine dispersion model performances for Fukushima Dai-ichi releases in the frame of IAEA MODARIA program

Peri$'a$$~n$ez, R.*; Brovchenko, I.*; Duffa, C.*; Jung, K.-T.*; Kobayashi, Takuya; Lamego, F.*; Maderich, V.*; Min, B.-I.*; Nies, H.*; Osvath, I.*; et al.

Journal of Environmental Radioactivity, 150, p.247 - 269, 2015/12

 Times Cited Count:25 Percentile:67.25(Environmental Sciences)

A detailed intercomparison of marine dispersion models applied to the releases from Fukushima Dai-ichi Nuclear Power Plant has been carried out in the frame of MODARIA program, of the IAEA. Models have been compared in such a way that the reasons of the discrepancies between them can be assessed. The overall idea is to harmonize models, making them run with the same forcing in a step-by-step procedure, in such a way that the main agent in producing discrepancy between models can be found. It has been found that the main reason of discrepancies between models is due to the description of the hydrodynamics. However, once this has been suppressed, some variability between model outputs remains due to intrinsic differences between models. The numerical experiments have been carried out for a perfectly conservative radionuclide and for $$^{137}$$Cs. Model outputs for this radionuclide have also been compared with measurements in water and sediments.

Journal Articles

Orbit-based analysis of resonant excitations of Alfv$'e$n waves in tokamaks

Bierwage, A.; Shinohara, Koji

Physics of Plasmas, 21(11), p.112116_1 - 112116_21, 2014/11

 Times Cited Count:20 Percentile:72.04(Physics, Fluids & Plasmas)

Journal Articles

A Model equation for ballooning modes in toroidally rotating tokamaks

Furukawa, Masaru; Tokuda, Shinji

Journal of Plasma and Fusion Research SERIES, Vol.6, p.210 - 213, 2004/00

A model equation for ballooning modes in toroidally rotating tokamaks is derived. It is confirmed that the model equation is appropriate for analyzing the stabilization mechanism of the ballooning modes by comparing the numerical solutions of the model equation with those of the original ballooning equations.

JAEA Reports

Development of a kinetics analysis code for fuel solution combined with thermal-hydraulics analysis code PHOENICS and analysis of natural-cooling characteristic test of TRACY (Contract research)

Watanabe, Shoichi; Yamane, Yuichi; Miyoshi, Yoshinori

JAERI-Tech 2003-045, 73 Pages, 2003/03

JAERI-Tech-2003-045.pdf:4.96MB

Since exact information is not always acquired in the criticality accident of fuel-solution, parametric survey calculations are required for grasping behaviors of the thermal-hydraulics. On the other hand, the practical methods of the calculation which can reduce the computation time with allowable accuracy will be also required, since the conventional method takes a long calculation time. In order to fulfill the requirement, a three-dimensional nuclear-kinetics analysis code considering thermal-hydraulic based on the multi-region kinetic equations with one-group neutron energy was created by incorporating the thermal-hydraulics analysis code PHOENICS as a subroutine. The computation time of the code was shortened by separating time mesh intervals of the nuclear- and heat-calculations from that of the hydraulics calculation, and by regulating automatically the time mesh intervals in proportion to power change rate. A series of analysis were performed for the natural-cooling characteristic test using TRACY in which the power changed slowly for 5 hours after the transient power resulting from the reactivity insertion of a 0.5 dollar. It was found that the code system was able to calculate within the limit of practical time, and acquired the prospect of reproducing the experimental values considerably for the power and temperature change.

Journal Articles

Numerical simulation of solid matter melting by CIP method

*; Kunugi, Tomoaki*; *; Sasaki, Akira; *

CIPUS Annual Report, 4 Pages, 1998/00

no abstracts in English

Journal Articles

Solving wave equations with the differential algebraic-cubic interpolated propagation scheme

*; Kunugi, Tomoaki

Comput. Model. Simul. Eng., 1(4), p.452 - 476, 1996/11

no abstracts in English

Journal Articles

Numerical simulation of thermo-fluid flow of non-equilibrium plasma impinging jet

Kunugi, Tomoaki; *; *

Dai-32-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, 0, p.565 - 566, 1995/05

no abstracts in English

Journal Articles

Thermo-hydrodynamic coupling with coolants

Akiba, Masato; R.D.Watson*

Atomic and Plasma-Material Interaction Processes in Controlled Thermonuclear Fusion, p.455 - 480, 1993/00

no abstracts in English

Journal Articles

Simulation code of extraction contactor for analyzing transient behavior

Maeda, Mitsuru; Fujine, Sachio; Uchiyama, Gunzo; *; *; ; *; *

Solvent Extraction in the Process Industries, Vol. 3, p.1517 - 1523, 1993/00

no abstracts in English

Journal Articles

Simulation code SAFE for analyzing transient solvent extraction behavior

Maeda, Mitsuru; Fujine, Sachio; *; *

Transactions of the American Nuclear Society, 66, p.78 - 80, 1992/11

no abstracts in English

JAEA Reports

Evaluation report on CCTF core-II reflood test C2-15(Run 75); Investigation of FLECHT-SET coupling test results

Okubo, Tsutomu; Iguchi, Tadashi; ; Murao, Yoshio

JAERI-M 91-227, 89 Pages, 1992/01

JAERI-M-91-227.pdf:1.82MB

no abstracts in English

JAEA Reports

Evaluation report on SCTF core-III test S3-9; Investigation of CCTF coupling test results under an evaluation model condition in PWRs with cold-leg-injection-type ECCS

Okubo, Tsutomu; Iguchi, Tadashi; Iwamura, Takamichi; ; Onuki, Akira; Abe, Yutaka; *; Adachi, Hiromichi; Murao, Yoshio

JAERI-M 90-046, 114 Pages, 1990/03

JAERI-M-90-046.pdf:2.26MB

no abstracts in English

JAEA Reports

Evaluation report on SCTF core-III test S3-17; Investigation of thermo-hydrodynamic behavior during reflood phase of LOCA in a PWR with vent valves

Okubo, Tsutomu; Iguchi, Tadashi; Iwamura, Takamichi; ; Onuki, Akira; Abe, Yutaka; *; Adachi, Hiromichi; Murao, Yoshio

JAERI-M 90-036, 120 Pages, 1990/03

JAERI-M-90-036.pdf:2.49MB

no abstracts in English

JAEA Reports

Evaluation report on SCTF core-III tests S3-7 and S3-8; Investigation of tie plate water temperature distribution effects on water break-through and core cooling during reflooding in PWRs with combined-injection-type ECCS

Okubo, Tsutomu; Iguchi, Tadashi; Iwamura, Takamichi; ; Onuki, Akira; Abe, Yutaka; *; *; Adachi, Hiromichi; Murao, Yoshio

JAERI-M 90-035, 143 Pages, 1990/03

JAERI-M-90-035.pdf:3.07MB

no abstracts in English

JAEA Reports

Evaluation report on CCTF core-II reflood test C2-AA2(Run 58); Investigation of downcomer injection effects

Okubo, Tsutomu; Iguchi, Tadashi; Sugimoto, Jun; ; Murao, Yoshio

JAERI-M 89-227, 96 Pages, 1990/01

JAERI-M-89-227.pdf:2.12MB

no abstracts in English

Journal Articles

Hydrodynamic characteristics of a single stage annular type centrifugal extractor

Fujine, Sachio; M.Kluth*; J.Lamla*; H.Goldacker*

Proc. of the Symp. on Solvent Extraction 1989, p.141 - 146, 1989/00

no abstracts in English

Journal Articles

The role of large scale experiments and big scale analysis

Murao, Yoshio

Genshiryoku Kogyo, 32(9), p.25 - 27, 1986/00

no abstracts in English

JAEA Reports

Evaluation Report on CCTF Core-II Reflood Test C2-4(Run62) Investigation of Reproducibility

; ; *; ; ; Murao, Yoshio

JAERI-M 85-026, 89 Pages, 1985/03

JAERI-M-85-026.pdf:1.82MB

no abstracts in English

39 (Records 1-20 displayed on this page)