Michael I. Ojovan's Books

Cementitious Materials for Nuclear Waste Immobilization

By: Rehab O. Abdel Rahman,Ravil Z. Rakhimov,Nailia R. Rakhimova,Michael I. Ojovan

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Cementitious Materials for Nuclear Waste Immobilization

By: Rehab O. Abdel Rahman,Ravil Z. Rakhimov,Nailia R. Rakhimova,Michael I. Ojovan

Cementitious materials are an essential part in any radioactive waste disposal facility. Conditioning processes such as cementation are used to convert waste into a stable solid form that is insoluble and will prevent dispersion to the surrounding environment. It is incredibly important to understand the long-term behavior of these materials. This book summarises approaches and current practices in use of cementitious materials for nuclear waste immobilisation. It gives a unique description of the most important aspects of cements as nuclear waste forms: starting with a description of wastes, analyzing the cementitious systems used for immobilization and describing the technologies used, and ending with analysis of cementitious waste forms and their long term behavior in an envisaged disposal environment. Extensive research has been devoted to study the feasibility of using cement or cement based materials in immobilizing and solidifying different radioactive wastes. However, these research results are scattered. This work provides the reader with both the science and technology of the immobilization process, and the cementitious materials used to immobilize nuclear waste. It summarizes current knowledge in the field, and highlights important areas that need more investigation. The chapters include: Introduction, Portland cement, Alternative cements, Cement characterization and testing, Radioactive waste cementation, Waste cementation technology, Cementitious wasteform durability and performance assessment.

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Page Count

245

Publisher

John Wiley & Sons

Published Date

ISBN 10

1118512006

ISBN 13

9781118512005

Crystalline Materials for Actinide Immobilisation

By: Boris E. Burakov,Michael I. Ojovan,W. E. Lee

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Crystalline Materials for Actinide Immobilisation

By: Boris E. Burakov,Michael I. Ojovan,W. E. Lee

This book summarises approaches and current practices in actinide immobilisation using chemically-durable crystalline materials e.g. ceramics and monocrystals. Durable actinide-containing materials including crystalline ceramics and single crystals are attractive for various applications such as nuclear fuel to burn excess Pu, chemically inert sources of irradiation for use in unmanned space vehicles or producing electricity for microelectronic devices, and nuclear waste disposal. Long-lived -emitting actinides such as Pu, Np, Am and Cm are currently of serious concern has a result of increased worldwide growth in the nuclear industry. Actinide-bearing wastes have also accumulated in different countries as a result of nuclear weapons production. Excess weapon and civil Pu from commercial spent fuel is waiting for environmentally-safe immobilisation. As actinides are chemical elements with unique features, they could be beneficially used in different areas of human life including medicine although currently there is no appropriate balance between safe actinide disposal and use. Both use and disposal of actinides require their immobilisation in a durable host material. The choice of an optimal actinide immobilisation route is often a great challenge for specialists. There is a wealth of information about actinide properties in many publications although little is published to summarise the currently accepted approaches and practices on actinide immobilisation. This book intends to provide such information based on the authors' experience and studies in nuclear material management and actinide immobilisation.

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Page Count

215

Publisher

World Scientific

Published Date

ISBN 10

1848164181

ISBN 13

9781848164185

An Introduction to Nuclear Waste Immobilisation

By: Michael I. Ojovan,William E Lee,William E. Lee

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An Introduction to Nuclear Waste Immobilisation

By: Michael I. Ojovan,William E Lee,William E. Lee

Safety and environmental impact is of uppermost concern when dealing with the movement and storage of nuclear waste. The 20 chapters in 'An Introduction to Nuclear Waste Immobilisation' cover all important aspects of immobilisation, from nuclear decay, to regulations, to new technologies and methods. Significant focus is given to the analysis of the various matrices used in transport: cement, bitumen and glass, with the greatest attention being given to glass. The last chapter concentrates on the performance assessment of each matrix, and on new developments of ceramics and glass composite materials, thermochemical methods and in-situ metal matrix immobilisation. The book thoroughly covers all issues surrounding nuclear waste: from where to locate nuclear waste in the environment, through nuclear waste generation and sources, treatment schemes and technologies, immobilisation technologies and waste forms, disposal and long term behaviour. Particular attention is paid to internationally approved and worldwide-applied approaches and technologies.* Each chapter focuses on a different matrix used in nuclear waste immobilisation: Cement, bitumen, glass and new materials.* Keeps the most important issues surrounding nuclear waste – such as treatment schemes and technologies, and disposal - at the forefront.

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Page Count

334

Publisher

Elsevier

Published Date

ISBN 10

0080455719

ISBN 13

9780080455716

New Developments in Glassy Nuclear Wasteforms

By: Michael I. Ojovan,W. E. Lee

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New Developments in Glassy Nuclear Wasteforms

By: Michael I. Ojovan,W. E. Lee

Based on the authors' recent investigations, this book describes the application of glassy and polyphase composite materials for nuclear waste immobilisation. It introduces immobilisation issues beginning with a short description of nuclear waste types and compositions. Sources of nuclear waste are described including the nuclear fuel cycle, operational and spent nuclear fuel reprocessing waste streams. The glassy waste forms currently being used for high-, intermediate- and low level radioactive waste immobilisation are described. Problems related to immobilisation capacity, process efficiency and long-term radionucleide retention are highlighted. Scientific and technical problems in nuclear waste immobilisation are emphasised in particular long-term waste form stability and durability. Recent developments in advanced nuclear waste forms are described such as glass composite materials (GCM) with higher versatility and waste loading. New immobilisation approaches and technologies are described including advanced cold crucible induction melting (CCM), self sustaining thermochemical immobilisation (SSI), and in-situ self-sintering in deep underground repositories. Long-term durability tests of nuclear waste glasses are outlined and the role of ion-exchange phase in glass corrosion is described in detail.

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Page Count

152

Publisher

Nova Publishers

Published Date

ISBN 10

1600217834

ISBN 13

9781600217838

Book's by Michael I. Ojovan

Cementitious Materials for Nuclear Waste Immobilization

Cementitious Materials for Nuclear Waste Immobilization

Crystalline Materials for Actinide Immobilisation

Crystalline Materials for Actinide Immobilisation

An Introduction to Nuclear Waste Immobilisation

An Introduction to Nuclear Waste Immobilisation

New Developments in Glassy Nuclear Wasteforms

New Developments in Glassy Nuclear Wasteforms

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