Chemical Aspects Governing the Choice of Backfill Materials for Nuclear Waste Repositories

1982 ◽  
Vol 59 (3) ◽  
pp. 405-408 ◽  
Author(s):  
Gary W. Beall ◽  
Bert Allard
Keyword(s):  
Nuclear Waste ◽  
Backfill Materials ◽  
Waste Repositories

Changes of Selected Structural and Mechanical Properties of the Strzelin Granites As Induced By Thermal Loads / Wpływ Obciążeń Termicznych Na Zmiany Niektórych Strukturalnych I Mechanicznych Właściwości Granitów Strzelińskich

2012 ◽  
Vol 57 (4) ◽  
pp. 951-974 ◽  
Author(s):  
Andrzej Nowakowski ◽  
Mariusz Młynarczuk
Keyword(s):  
Mechanical Properties ◽  
Nuclear Waste ◽  
Structural Changes ◽  
Structural Parameters ◽  
Total Porosity ◽  
Fracture Network ◽  
Qualitative Description ◽  
Temperature Changes ◽  
Heating And Cooling ◽  
Waste Repositories

Abstract Temperature is one of the basic factors influencing physical and structural properties of rocks. A quantitative and qualitative description of this influence becomes essential in underground construction and, in particular, in the construction of various underground storage facilities, including nuclear waste repositories. The present paper discusses the effects of temperature changes on selected mechanical and structural parameters of the Strzelin granites. Its authors focused on analyzing the changes of granite properties that accompany rapid temperature changes, for temperatures lower than 573ºC, which is the value at which the β - α phase transition in quartz occurs. Some of the criteria for selecting the temperature range were the results of measurements carried out at nuclear waste repositories. It was demonstrated that, as a result of the adopted procedure of heating and cooling of samples, the examined rock starts to reveal measurable structural changes, which, in turn, induces vital changes of its selected mechanical properties. In particular, it was shown that one of the quantities describing the structure of the rock - namely, the fracture network - grew significantly. As a consequence, vital changes could be observed in the following physical quantities characterizing the rock: primary wave velocity (vp), permeability coefficient (k), total porosity (n) and fracture porosity (η), limit of compressive strength (Rσ1) and the accompanying deformation (Rε1), Young’s modulus (E), and Poisson’s ratio (ν).

Experimental study and modeling of uranium (VI) transport through ferrous olivine rock columns

2000 ◽  
Vol 88 (9-11) ◽  
Author(s):  
M. Rovira ◽  
F.Z. El Aamrani ◽  
L. Duro ◽  
Ignasi Casas ◽  
Joan de Pablo ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Reactive Transport ◽  
Calculated Data ◽  
Buffering Capacity ◽  
Retardation Factor ◽  
Reactive Transport Modeling ◽  
Redox Active ◽  
Different Types ◽  
Free Media ◽  
Waste Repositories

The Lovasjärvi intrusion (SE-Finland) contents a high percentage of ferrous olivine (> 65%). This material has been suggested as a redox-active backfill-additive in deep nuclear waste repositories, due to the large Fe(II) proportion in its mineral composition. In order to understand the processes involved in the redox buffering capacity of this material the transport of uranium (VI) through olivine columns was studied. The results showed considerable retardation factor for the U(VI), particularly in carbonate-free media. The experimental data were simulated by means of reactive transport modeling. The best agreement between the experimental and calculated data was obtained considering that the interaction of U(VI) with the olivine surface occurred at two different types of sorption sites. One type accounts for the sorption capacity of the olivine mineral, and a second type accounts for the sorption on amorphous Fe(OH)

scholarly journals Geologic environments for nuclear waste repositories

2017 ◽  
Vol 120 ◽  
pp. 06003 ◽  
Author(s):  
Evan K. Paleologos ◽  
Abdel-Mohsen O. Mohamed ◽  
Kosmas Pavlopoulos
Keyword(s):  
Nuclear Waste ◽  
Waste Repositories

Perceived Risk and Benefit of Nuclear Waste Repositories: Four Opinion Clusters

Risk Analysis ◽  
2012 ◽  
Vol 33 (6) ◽  
pp. 1038-1048 ◽  
Author(s):  
Roman Seidl ◽  
Corinne Moser ◽  
Michael Stauffacher ◽  
Pius Krütli
Keyword(s):  
Nuclear Waste ◽  
Perceived Risk ◽  
Risk And Benefit ◽  
Waste Repositories

Speciation of actinides in groundwater samples collected near deep nuclear waste repositories

2018 ◽  
Vol 192 ◽  
pp. 334-341 ◽  
Author(s):  
A.P. Novikov ◽  
I.E. Vlasova ◽  
A.V. Safonov ◽  
V.M. Ermolaev ◽  
E.V. Zakharova ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Groundwater Samples ◽  
Waste Repositories

Introduction

2020 ◽  
pp. 1-19
Author(s):  
Rosemary A. Joyce
Keyword(s):  
Nuclear Waste ◽  
Common Sense ◽  
Planning Process ◽  
Pilot Project ◽  
The United States ◽  
Nuclear Waste Repository ◽  
Alternative Futures ◽  
Us Government ◽  
Marker Design ◽  
Waste Repositories

Providing an introduction to the planning process for the Waste Isolation Pilot Project and the marker design that continues to be the basis of nuclear waste repository proposals in the United States, including for Yucca Mountain, this chapter lays the groundwork for consideration of the contradictions between opinions produced through expert consultation and the expertise of archaeologists. US government efforts described enlisted a variety of “experts” to propose alternative futures, identify models for communication over long spans of time, and assess the likely durability of proposed designs for a marker over nuclear waste repositories. To understand these expert reports, this chapter introduces the concept of an anthropology of common sense as a way to understand how government experts understood the archaeological sites that they offered as models.

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