The Influence of Preoxidation on the Corrosion of Copper Nuclear Waste Canisters in Aqueous Anoxic Sulphide Solutions

2006 ◽  
Vol 985 ◽  
Author(s):  
Jared M. Smith ◽  
Z. Qin ◽  
J. C. Wren ◽  
D. W. Shoesmith
Keyword(s):  
Nuclear Waste ◽  
Analytical Techniques ◽  
Corrosion Damage ◽  
Nuclear Waste Repository ◽  
In Situ Raman Spectroscopy ◽  
Sulphide Concentration ◽  
High Level Nuclear Waste ◽  
Kinetics Of Reaction ◽  
High Level

AbstractScandinavian/Canadian high-level nuclear waste repository conditions are expected to evolve from initially warm and oxic to eventually cool and anoxic. During the warm oxic period, corrosion products will accumulate on the container surface. These deposits could impede the reaction of Cu with aqueous sulphide, the only reaction that could lead to the significant accumulation of additional corrosion damage under the long-term anoxic conditions. The kinetics of reaction of Cu with aqueous sulphide solutions have been studied using electrochemical and surface analytical techniques. Corrosion potential measurements were used to follow the evolution of the surface as oxides/hydroxides were converted to sulphides in the sulphide concentration range 10-5 to 10-3 mol/L. Changes in composition were followed by in-situ Raman spectroscopy. Of critical importance is whether or not a period of preoxidation of a Cu container surface can prevent subsequent reaction of the surface with remotely produced sulphide

Comparison of Granite, Tuff, and Basalt as Geologic Media for Long-Term Storage of High-Level Nuclear Waste

1990 ◽  
Vol 212 ◽  
Author(s):  
D. E. Grandstaff ◽  
V. J. Grassi ◽  
A. C. Lee ◽  
G. C. Ulmer
Keyword(s):  
Nuclear Waste ◽  
Nuclear Waste Repository ◽  
Long Term Storage ◽  
Hydrothermal Experiments ◽  
Ion Activity ◽  
Activity Ratios ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Term Storage

ABSTRACTSystematic differences in pH, cation/proton ion activity ratios, and redox have been observed between solutions produced in rock-water hydrothermal experiments with tuff, granite, and basalt. Stable pH values in tuff-water experiments may be as much as 1.5 pH units more acidic than basalt-water experiments at the same temperature and ionic strength. Redox (log fO2) values in 300°C tuff experiments are 4–7 orders of magnitude more oxidizing than basalt experiments and ca. 4 log units more oxidizing than the magnetite-hematite buffer. Such fluid differences could significantly affect the performance of a high-level nuclear waste repository and should be considered in repository design and siting.

scholarly journals Effects of long-term exposure of tuffs to high-level nuclear waste repository conditions. Final report

10.2172/59938 ◽  
1986 ◽  
Author(s):  
J.D. Blacic ◽  
D.T. Vaniman ◽  
D.L. Bish ◽  
C.J. Duffy ◽  
R.C. Gooley
Keyword(s):  
Nuclear Waste ◽  
Nuclear Waste Repository ◽  
Final Report ◽  
High Level Nuclear Waste ◽  
Waste Repository ◽  
High Level

Environmental Remediation of High-Level Nuclear Waste in Geological Repository: Modified Computer Code Creates Ultimate Benchmark in Natural Systems

2010 ◽  
Author(s):  
Geoffrey J. Peter
Keyword(s):  
Nuclear Waste ◽  
Environmental Remediation ◽  
Computer Code ◽  
Nuclear Waste Repository ◽  
Natural Systems ◽  
Permanent Storage ◽  
High Level Nuclear Waste ◽  
High Level ◽  
Waste Repositories

Isolation of high-level nuclear waste in permanent geological repositories has been a major concern for over 30 years due to the migration of dissolved radio nuclides reaching the water table (10,000-year compliance period) as water moves through the repository and the surrounding area. Repositories based on mathematical models allow for long-term geological phenomena and involve many approximations; however, experimental verification of long-term processes is impossible. Countries must determine if geological disposal is adequate for permanent storage. Many countries have extensively studied different aspects of safely confining the highly radioactive waste in an underground repository based on the unique geological composition at their selected repository location. This paper discusses two computer codes developed by various countries to study the coupled thermal, mechanical, and chemical process in these environments, and the migration of radionuclide. Further, this paper presents the results of a case study of the Magma-hydrothermal (MH) computer code, modified by the author, applied to nuclear waste repository analysis. The MH code verified by simulating natural systems thus, creating the ultimate benchmark. This approach based on processes similar to those expected near waste repositories currently occurring in natural systems.

scholarly journals Effects of long-term exposure of tuffs to high-level nuclear waste-repository conditions. Preliminary report

10.2172/59135 ◽  
1982 ◽  
Author(s):  
J. Blacic ◽  
J. Carter ◽  
P. Halleck ◽  
P. Johnson ◽  
T. Shankland ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Preliminary Report ◽  
Nuclear Waste Repository ◽  
High Level Nuclear Waste ◽  
Waste Repository ◽  
High Level

A Review of the High-Level Nuclear Waste Repository Siting Analysis

Risk Analysis ◽  
1987 ◽  
Vol 7 (2) ◽  
pp. 219-223 ◽  
Author(s):  
Robin Gregory ◽  
Sarah Lichtenstein
Keyword(s):  
Nuclear Waste ◽  
Nuclear Waste Repository ◽  
High Level Nuclear Waste ◽  
Waste Repository ◽  
High Level
Sign in / Sign up

Export Citation Format

Share Document