Glass Corrosion Theories a Tool for Understanding the Past, Designing for the Present and Predicting the Future

1988 ◽  
Vol 125 ◽  
Author(s):  
P. B. Adams
Keyword(s):  
Nuclear Waste ◽  
Optical Waveguides ◽  
Nuclear Waste Management ◽  
Present Level ◽  
Corrosion Performance ◽  
The Past ◽  
Glass Corrosion ◽  
The Future ◽  
Corrosion Mechanisms ◽  
Level Of Understanding

ABSTRACTThere is renewed appreciation for understanding glass corrosion mechanisms due in large part to the urgency of nuclear waste management. Although the ultimate goal - to predict specific corrosion performance - has not yet been reached, theories continue to be fine tuned so that this objective now appears attainable.However, even at our present level of understanding, chemical durability theory is a vital tool in reading the secrets of the past as contained in both ancient and natural glasses, designing products such as optical waveguides for a new technological age and predicting how those products, such as nuclear waste glass, will perform - far into the future.

Theory of Corrosion of Alkali-Borosilicate Glass

1982 ◽  
Vol 15 ◽  
Author(s):  
David E. Clark ◽  
Larry L. Hench
Keyword(s):  
Nuclear Waste ◽  
Film Formation ◽  
Surface Film ◽  
Soda Lime ◽  
Surface Films ◽  
Glass Corrosion ◽  
Commercially Important ◽  
Corrosion Mechanisms ◽  
Exchange Network ◽  
Dissolution And Precipitation

ABSTRACTThe alkali-borosilicate (ABS) system provides the basis for a wide variety of commercially important products among which are the nuclear waste glasses. Although a large number of investigations have been undertaken in the last five years, the corrosion mechanisms of the ABS glasses have not been characterized nearly as well as for the soda-lime-silicate (NCS) glasses commonly used for containers. It is well known that the corrosion of the latter glasses involves ion exchange, network dissolution, and precipitation mechanisms resulting in the development of one of five types of surface films. In the present paper we compare the corrosion behavior to the ABS and NCS glasses and discuss our current understanding of ABS glass corrosion in terms of mechanisms, kinetics, surface film formation and thermodynamics.

Materials Research in Nuclear Waste Management: Reflections on Twenty-Five MRS Symposia

2002 ◽  
Vol 713 ◽  
Author(s):  
Rodney C. Ewing
Keyword(s):  
Waste Management ◽  
Nuclear Waste ◽  
Scientific Basis ◽  
Nuclear Waste Management ◽  
The Past ◽  
Materials Research ◽  
Long Term Performance ◽  
Term Performance ◽  
Selection Of

ABSTRACTThe MRS symposium, “Scientific Basis for Nuclear Waste Management” was first held in Boston, November 28th to December 1st, 1978. This symposium marks the twenty-fifth in a series that now rotate to meeting sites around the world. During the past 24 years, there has been considerable progress in the development and understanding of the behavior of materials that are used in the processing, transport, containment and disposal of radioactive waste. The design and selection of materials for long-term performance has required a uniquely interdisciplinary effort. Over the same period, there have been important developments in the regulatory framework that guides the scientific and engineering needs of nuclear waste management. This paper provides a subjective commentary on the major developments and innovations during the past 25 symposia. The future challenge will be the proper and constructive integration of the science into the development of nuclear waste disposal strategies.

Tailoring the selectivity of phenanthroline derivatives for the partitioning of trivalent Am/Eu ions - A relativistic DFT study

2021 ◽  
Author(s):  
Cheriyan Ebenezer ◽  
Vijay Solomon Rajadurai
Keyword(s):  
Waste Management ◽  
Nuclear Waste ◽  
Dft Study ◽  
Nuclear Waste Management ◽  
The Past ◽  
Relativistic Dft ◽  
Trivalent Actinides

In the past few years, phenanthroline based ligands have become an attractive target for the partitioning of trivalent Actinides (Ac) from Lanthanides (Ln) in nuclear waste management. However, designing efficient...

Research Priorities in Nuclear Waste Management: A View From the Far Field

1997 ◽  
Vol 506 ◽  
Author(s):  
Philip J. Richardson
Keyword(s):  
Waste Management ◽  
Nuclear Waste ◽  
Research Priorities ◽  
Nuclear Waste Management ◽  
Far Field ◽  
The Past

ABSTRACTFirst of all I would like to express my appreciation to the MRS for the opportunity to address this symposium. I am especially pleased to be speaking alongside Charles McCombie and Soren Norrby, who have both made me feel welcome whenever we have met in the past. I have been more active in Sweden over the last few years, as Soren will know. Perhaps it is now time I turned my attentions to Switzerland as well.

scholarly journals Can We Distinguish between Inflammatory and Neuropathic Pain?

2006 ◽  
Vol 11 (suppl a) ◽  
pp. 11A-15A ◽  
Author(s):  
Gary J Bennett
Keyword(s):  
Neuropathic Pain ◽  
Present Level ◽  
Analgesic Drugs ◽  
The Past ◽  
Number Of Patients ◽  
Definition Of ◽  
Level Of Understanding

Inflammatory and neuropathic pain were once considered to be distinct entities. However, research over the past decade or so has brought to light many shared mechanisms, and the distinction between the two is no longer clear. Consideration of mechanisms, symptoms and the effects of analgesic drugs does not reveal any definitive or universally applicable differentiating factors. Given the present level of understanding, it may not be possible to distinguish between inflammatory and neuropathic pain in a large number of patients, and a satisfying definition of neuropathic pain may not be possible.

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