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Sugiyama, Daisuke*; Nakabayashi, Ryo*; Tanaka, Shingo*; Koma, Yoshikazu; Takahatake, Yoko
Journal of Nuclear Science and Technology, 58(4), p.493 - 506, 2021/04
Times Cited Count:2 Percentile:31.78(Nuclear Science & Technology)Sugiyama, Daisuke*; Nakabayashi, Ryo*; Koma, Yoshikazu; Takahatake, Yoko; Tsukamoto, Masaki*
Journal of Nuclear Science and Technology, 56(9-10), p.881 - 890, 2019/09
Times Cited Count:4 Percentile:41.24(Nuclear Science & Technology)Furuno, Akiko; Terada, Hiroaki; Chino, Masamichi; Yamazawa, Hiromi*
Atmospheric Environment, 38(40), p.6989 - 6998, 2004/12
Times Cited Count:20 Percentile:41.46(Environmental Sciences)We have been developing the computer-based emergency response system WSPEEDI which predicts long-range atmospheric dispersion of radionuclides discharged into the atmosphere due to a nuclear accident. The first version of WSPEEDI has a shortage that the spatial and temporal variation of the atmospheric boundary layer was very simply parameterized. Therefore we have developed the new version accomplished with the atmospheric dynamic model, in which the turbulent diffusivity in the mixing layer is calculated with a turbulence closure model. This paper describes the results of performance evaluation of the new version of WSPEEDI by comparing the simulation results with the European Tracer Experiment data. As a result of the verification, it was shown that the increase in the horizontal resolution largely improved the accuracy of the model prediction. The use of the turbulence closure model instead of the simple parameterization largely contributed to improve reproducibility of horizontal distribution of plumes.
Hatae, Takaki; Osborne, T. H.*; Kamada, Yutaka; Groebner, R. J.*; Takizuka, Tomonori; Fukuda, Takeshi; Lao, L. L.*
Plasma Physics and Controlled Fusion, 42(suppl.5A), p.A283 - A288, 2000/05
Times Cited Count:9 Percentile:29.51(Physics, Fluids & Plasmas)no abstracts in English
M.Elert*; A.Butler*; J.Chen*; C.Dovlete*; A.Konoplev*; A.Golubenkov*; M.Sheppard*; Togawa, Orihiko; T.Zeevaert*
Journal of Environmental Radioactivity, 42, p.255 - 270, 1999/00
Times Cited Count:8 Percentile:23.86(Environmental Sciences)no abstracts in English
Takeda, Seiji; Moltyaner, G. L.*
JAERI-Research 98-031, 28 Pages, 1998/06
no abstracts in English
; Matsuzuru, Hideo; *
JAERI-M 88-089, 36 Pages, 1988/05
no abstracts in English
Sasamoto, Hiroshi; Arthur, R. C.*; Alt-Epping, P.*; Tachi, Yukio
no journal, ,
The present study performed an interpretation of natural tracers (non or weakly sorption elements) profiles of groundwater observed in the boreholes drilled from the surface around the Horonobe Underground Laboratory based on the transport processes of advection and diffusion. In the interpretation, due to several uncertainty ranges for transport parameters in initial and boundary conditions, sensitivity analyses considering the relevant model parameters defined uncertainty limits were also conducted to evaluate the plausible parameter sets and conditions to be compatible with observations.