scholarly journals Vertical motion of ground water in bed rock induced by earth tide and its influence on a repository for burnt nuclear fuel: a theoretical calculation

2005 ◽  
Vol 36 (2) ◽  
pp. 137-162 ◽  
Author(s):  
G. Rehbinder
Keyword(s):  
Ground Water ◽  
Nuclear Waste ◽  
Earth Tide ◽  
Vertical Motion ◽  
Field Measurements ◽  
Flow Equation ◽  
Phreatic Surface ◽  
Diffusive Flow ◽  
Water Move ◽  
Tide Effect

Earth tide induced by the Moon and the Sun makes the volume of pores or the apertures of fractures of the bed rock vary, which in turn makes the ground water move. The flow equation of ground water, complete with the tide effect, and its solution, shows that the diffusive propagation of pore pressure is decisive for the response of the perturbation of gravity. Moreover the solution shows that diffusive flow dominates in the Fennoscandian Precambrian rock. The analysis shows that a constitutive coefficient relating the varying perturbation gravity and porosity of bed rock can be determined by field measurements of the level of water in boreholes. Water in a cavity in the bed rock is exposed to an oscillatory interaction with the surrounding pore water. If the cavity is a repository for nuclear waste, this interaction deserves attention. The analysis shows that the magnitude of the oscillatory motion of water between a repository for nuclear waste and its. surrounding groundwater is much less than the vertical motion of the phreatic surface.

The Role of Colloids in Nuclear Waste Disposal

1983 ◽  
Vol 26 ◽  
Author(s):  
A. Avogadro ◽  
G.De Marsily
Keyword(s):  
Ground Water ◽  
Nuclear Waste ◽  
Waste Disposal ◽  
Column Experiments ◽  
Colloidal Transport ◽  
Container Material ◽  
Colloidal Fraction ◽  
Filtration Model

ABSTRACTAspects of formation and characterization of a radioactive colloidal fraction released by the waste form or produced by association with microcolloids naturally existing in ground water or produced either by corrosion of container material or by degradation of backfill material are discussed. A filtration model has been developed in order to describe colloidal transport under field conditions. Comparison between data obtained with laboratory column experiments and theoretical evaluations is presented.

scholarly journals Utilizing Temperature and Brine Inflow Measurements to Constrain Reservoir Parameters During a Salt Heater Test

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1025
Author(s):  
Richard S. Jayne ◽  
Kristopher L. Kuhlman
Keyword(s):  
Nuclear Waste ◽  
Field Measurements ◽  
Chemical Processes ◽  
Nuclear Waste Storage ◽  
One Dimensional ◽  
Waste Storage ◽  
Dimensional Modeling ◽  
Damaged Zone ◽  
The One ◽  
Best Fit

Brine availability in salt has multiple implications for the safety and design of a nuclear waste storage facility. Brine availability includes both the distribution and transport of brine through a damaged zone around boreholes or drifts excavated into the salt. Coupled thermal, hydrological, mechanical, and chemical processes taking place within heated bedded salt are complex; as part of DECOVALEX 2023 Task E this study takes a parsimonious modeling approach utilizing analytical and numerical one-dimensional simulations to match field measurements of temperature and brine inflow around a heater. The one-dimensional modeling results presented arrive at best-fit thermal conductivity of intact salt, and the permeability and porosity of damaged salt of 5.74 W/m·K, 10−17 m2, and ≈ 0.02, respectively.

scholarly journals Mathematical Modeling of the Distribution of Natural 14C, 234U, and 238U in a Regional Ground-Water System

Radiocarbon ◽  
1983 ◽  
Vol 25 (2) ◽  
pp. 291-300 ◽  
Author(s):  
F J Pearson ◽  
C J Noronha ◽  
R W Andrews
Keyword(s):  
Ground Water ◽  
Nuclear Waste ◽  
Site Selection ◽  
Selection Process ◽  
Natural Radionuclides ◽  
Water System ◽  
Residence Times ◽  
Naturally Occurring ◽  
Hydrologic Data ◽  
Regional Hydrology

Increasing concern with nuclear waste isolation technology is leading to additional studies of naturally occurring isotopes in ground water. Such studies provide information on 1) the use of radionuclides to estimate ground-water travel times and/or residence times. This information can he an extremely useful adjunct to conventional hydrologic data in developing the understanding of regional hydrology needed in the site selection process, and 2) the use of natural radionuclides as analogues to the behavior of radionuclides of concern in nuclear waste.

Ceramic coatings for a corrosion-resistant nuclear waste container evaluated in simulated ground water at 90 °C

2005 ◽  
Vol 36 (5) ◽  
pp. 1085-1095 ◽  
Author(s):  
Jeffery J. Haslam ◽  
Joseph C. Farmer ◽  
Robert W. Hopper ◽  
Keith R. Wilfinger
Keyword(s):  
Ground Water ◽  
Nuclear Waste ◽  
Ceramic Coatings ◽  
Corrosion Resistant ◽  
Waste Container

Corrosion of Simulated Nuclear Waste Glass in a Gamma Radiation Field

1984 ◽  
Vol 44 ◽  
Author(s):  
H Yokoyama ◽  
H-P Hermansson ◽  
H Christensen ◽  
I-K Björner ◽  
L Werme
Keyword(s):  
Surface Morphology ◽  
Gamma Radiation ◽  
Ground Water ◽  
Radiation Field ◽  
Nuclear Waste ◽  
Room Temperature ◽  
Buffering Effect ◽  
Nuclear Waste Glass ◽  
Gamma Irradiated ◽  
Glass Leaching

AbstractTwo types of simulated nuclear waste glasses were leached and simultaneously gamma-irradiated. The leachate pH was reduced through irradiation, which enhanced glass leaching at room temperature. In contrast, the pH was maintained almost neutral in the experiment at 90°C and the leach rates were about five times lower than those for the glass leached at 90°C but out of the radiation field. Most of the leach rates correlated with the final pH of the leachate. Ground water, granite and bentonite moderates the effect of gammairradiation, probably because of a buffering effect. Simultaneous weathering and irradiation could greatly change the surface morphology of the glass.

scholarly journals Spatial and temporal variation in pH, alkalinity and conductivity in surface runoff and groundwater for the Upper River Severn catchment

1997 ◽  
Vol 1 (3) ◽  
pp. 697-715 ◽  
Author(s):  
T. Hill ◽  
C. Neal
Keyword(s):  
Temporal Variation ◽  
Ground Water ◽  
Field Measurements ◽  
Temporal Variations ◽  
Spatial And Temporal Variation ◽  
Flow Conditions ◽  
Land Usage ◽  
Load Analysis ◽  
Stream Waters ◽  
Upland Catchments

Abstract. Measurements of pH, alkalinity and electrical conductivity are used to examine the extent of the spatial and temporal variation in stream and ground water chemistry for the Upper Severn catchment, Plynlimon. Wide temporal variations in stream waters broadly reflect flow conditions and complex soil and ground water interactions but not soil type, land usage or geology. The results have major implications for the use of critical load analysis and the development and application of models in upland catchments. They point to the value of field measurements for assessing the environmental management of upland catchments, rather than the present use of over simplistic or inappropriate models.

Modelling of the Near-Field Chemical Environment

1987 ◽  
Vol 112 ◽  
Author(s):  
Ingmar Grenthe
Keyword(s):  
Ground Water ◽  
Nuclear Waste ◽  
Near Field ◽  
Chemical Processes ◽  
Thermodynamic Modelling ◽  
Chemical Environment ◽  
Field Modelling ◽  
Waste Repositories

AbstractA review of chemical phenomena of importance for the conceptual near-field modelling of nuclear waste repositories is given. The emphasis is on thermodynamic modelling and the coupling of chemical processes mediated through ground water.

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