scholarly journals The use of naturally occurring helium to estimate groundwater velocities for studies of geologic storage of radioactive waste

1979 ◽  
Vol 15 (5) ◽  
pp. 1130-1136 ◽  
Author(s):  
I. W. Marine
Keyword(s):  
Radioactive Waste ◽  
Geologic Storage ◽  
Naturally Occurring

Laboratory Experiments of Mass Transfer in the London Clay

1988 ◽  
Vol 127 ◽  
Author(s):  
P. J. Bourke ◽  
D. Gilling ◽  
N. L. Jefferies ◽  
D. A. Lever ◽  
T. R. Lineham
Keyword(s):  
Mass Transfer ◽  
Porous Media ◽  
Radioactive Waste ◽  
Mass Transport ◽  
Mathematical Models ◽  
Laboratory Experiments ◽  
Naturally Occurring ◽  
Diffusion And Convection ◽  
Waste Repository ◽  
London Clay

ABSTRACTAqueous phase mass transfer through the rocks surrounding a radioactive waste repository will take place by diffusion and convection. This paper presents a comprehensive set of measurements of the mass transfer characteristics for a single, naturally occurring, clay. These data have been compared with the results predicted by mathematical models of mass transport in porous media, in order to build confidence in these models.

scholarly journals A Natural Analogue Approach for Estimating the Health Risks from Release and Migration of Radionuclides from Radioactive Waste.

1983 ◽  
Vol 26 ◽  
Author(s):  
Thomas L. Gilbert
Keyword(s):  
Radioactive Waste ◽  
Health Risks ◽  
Food Concentration ◽  
Causal Chain ◽  
Transfer Factors ◽  
Naturally Occurring ◽  
Naturally Occurring Radionuclides ◽  
Sum Of Products ◽  
Modeling Transport ◽  
And Migration

ABSTRACTThe health risks from radioactive waste may be expressed as a sum of products of transfer factors that characterize the causal chain of events between disposal of radionuclides in a waste field and the consequent health effects. “Model” estimates for the transfer factors are commonly obtained by modeling transport and other mechanisms in the subsystems that form the links in the causal chain. “Natural” estimates of some transfer factors for naturally occurring radionuclides can be obtained from data on the concentrations of naturally occurring radionuclides in soil, food, and the human body. These “model” and “natural” estimates can be used with scaling procedures to estimate the uncertainties and to obtain better estimates of the transfer factors. The scaling procedures take into account the differences in the source characteristics for radionuclides in a waste field of limited size and for radionuclides generally distributed in the natural environment. The ratios of the natural estimates to the model estimates for several transfer factors and several radionuclides belonging to the U-238 decay series have been determined. These ratios range from 1/8 to 4/1 for food-concentration/sourceconcentration transfer factors for the food pathways and from 1 to 77 for dose-rate/source-concentration transfer factors for the internal radiation dose pathways to various organs.

Sources and extent of pollution

1979 ◽  
Vol 205 (1158) ◽  
pp. 5-15 ◽  
Keyword(s):  
Radioactive Waste ◽  
Polychlorinated Biphenyls ◽  
Chemical Reaction ◽  
Sulphur Dioxide ◽  
Scientific Understanding ◽  
Fluid Mixing ◽  
Residence Times ◽  
Naturally Occurring ◽  
Definition Of ◽  
Natural Cycles

Before the sources and extent of pollution can be identified a definition of pollutants has to be agreed. The degree of disruption of natural cycles in the global ecosystem in terms of residence times and assimilation capacities must be assessed as a prerequisite of any system of control. The sources of man-made and naturally occurring chemicals that fall into this definition can be categorized and these are presented for reference. Specific examples of these categories are discussed in detail, e. g. sulphur dioxide, polychlorinated biphenyls and radioactive waste. Their distribution and dilution in the environment are governed by fluid mixing mechanisms. These can be modelled to allow prediction of effects at specific points taking into account disappearance by decay, chemical reaction and deposition. Reappearance through pathways which involve accumulation and remobilization can only be predicted when a complete scientific understanding of the mechanism has been established.

Numerical Simulation of Flow and Transport in Fractured Tuff

1983 ◽  
Vol 26 ◽  
Author(s):  
B. J. Travis ◽  
S. W. Hodson ◽  
H. E. Nuttall ◽  
T. L. Cook ◽  
R. S. Rundberg
Keyword(s):  
Numerical Simulation ◽  
Heat Flow ◽  
Radioactive Waste ◽  
Numerical Models ◽  
Test Site ◽  
Yucca Mountain ◽  
Nevada Test Site ◽  
Flow And Transport ◽  
Geologic Storage ◽  
High Level

ABSTRACTThe unsaturated, fractured tuff of Yucca Mountain in the Nevada Test Site is one of the potential sites for geologic storage of high-level radioactive waste. A modeling study of flow and transport in this geologically complex site is presented. Numerical models of mass and heat flow in conjunction with analytical solutions are being used for sensitivity and pathway analysis studies and to aid in design and interpretation of laboratory and field flow and transport tests in tuff.

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