Author: J. MacKenzie
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages :

View

Book Description

Author: R. Atkinson
Publisher:
ISBN: 9780705808781
Category : Groundwater flow
Languages : en
Pages : 32

View

Book Description

Author: Yasuo Onishi
Publisher:
ISBN:
Category : Radioactive pollution of water
Languages : en
Pages : 528

View

Book Description

Author: NEA Project on Radionuclide Migration in Geologic, Heterogeneous Media
Publisher: OECD Publishing
ISBN:
Category : Science
Languages : en
Pages : 324

View

Book Description
ThIS fourth GEOTRAP workshop, Confidence in Models of Radionuclide Transport for Site-specific Performance Assessment held in June 1999, addressed the issue of technical confidence building and provided an overview of current developments in this field.

Author: William W. Sayre
Publisher:
ISBN:
Category : Radioactive tracers in water pollution research
Languages : en
Pages : 44

View

Book Description

Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 962

View

Book Description

Author: D. B. Spalding
Publisher:
ISBN:
Category : Fluid mechanics
Languages : en
Pages :

View

Book Description

Author: Daisuke Kawasaki
Publisher: VDM Publishing
ISBN: 9783836485128
Category : Technology & Engineering
Languages : en
Pages : 136

View

Book Description
Analyses of radionuclide transport in geologic radioactive waste repository are made for a water-saturated repository and an unsaturated repository. To deal with the transport problem at the repository scale with multiple nuclide sources, compartment models are developed. The models allow us to observe the effects of repository layout on the performance of waste disposal system, and thus can be applied for making comparisons among various designs of repository layout. Residence times of radionuclides in individual components are found to be the key parameters in the present analysis, and the peak concentration of the radionuclide in the groundwater is formulated in terms of the residence times. Compartment models are further developed in integration with stochastic processes in order to reflect two- and three-dimensional transport and to incorporate residence time distributions obtained from an analysis at a sub-compartment scale. The models and the analysis should be useful to researchers engaged in performance assessment of radioactive waste repository as well as environmental scientists modeling contaminant transport in groundwater.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 512

View

Book Description
This report describes the results of a detailed literature review of radionuclide transport models applicable to rivers, estuaries, coastal waters, the Great Lakes, and impoundments. Some representatives sediment transport and water quality models were also reviewed to evaluate if they can be readily adapted to radionuclide transport modeling. The review showed that most available transport models were developed for dissolved radionuclide in rivers. These models include the mechanisms of advection, dispersion, and radionuclide decay. Since the models do not include sediment and radionuclide interactions, they are best suited for simulating short-term radionuclide migration where: (1) radionuclides have small distribution coefficients; (2) sediment concentrations in receiving water bodies are very low. Only 5 of the reviewed models include full sediment and radionuclide interactions: CHMSED developed by Fields; FETRA SERATRA, and TODAM developed by Onishi et al, and a model developed by Shull and Gloyna. The 5 models are applicable to cases where: (1) the distribution coefficient is large; (2) sediment concentrations are high; or (3) long-term migration and accumulation are under consideration. The report also discusses radionuclide absorption/desorption distribution ratios and addresses adsorption/desorption mechanisms and their controlling processes for 25 elements under surface water conditions. These elements are: Am, Sb, C, Ce, Cm, Co, Cr, Cs, Eu, I, Fe, Mn, Np, P, Pu, Pm, Ra, Ru, Sr, Tc, Th, 3H, U, Zn and Zr.

Author: British Library. Document Supply Centre
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 608

View

Book Description