Michael Ojovan | The University of Sheffield (original) (raw)
Michael I. Ojovan is Chief Editor of journal “Science and Technology of Nuclear Installations”. He has been Nuclear Engineer of International Atomic Energy Agency (IAEA), works as Professor of Imperial College London and Associate Reader at the University of Sheffield, UK, Leading Scientist of Lomonosov Moscow State University and Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry (IGEM) of Russian Academy of Sciences. He has published 14 monographs including the “Handbook of Advanced Radioactive Waste Conditioning Technologies” by Woodhead and three editions of “An Introduction to Nuclear Waste Immobilisation” by Elsevier. He has founded and led the IAEA International Predisposal Network (IPN) and the IAEA International Project on Irradiated Graphite Processing (GRAPA).
M. Ojovan is known for the connectivity-percolation theory of glass transition, Sheffield model of viscosity of glasses and melts, theoretical bases of condensed Rydberg matter, metallic and glass-composite materials for nuclear waste immobilisation, and self-sinking capsules to investigate Earth’ deep interior.
Web page: http://www.imperial.ac.uk/people/m.ojovan
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Papers by Michael Ojovan
Elsevier eBooks, 2005
Publisher Summary This chapter discusses migration and redistribution of elements in the Earth... more Publisher Summary This chapter discusses migration and redistribution of elements in the Earth's environment. Volcanic activity, atmospheric factors; and anthropogenic because of the action of living species lead to migration and redistribution of elements in the Earth's environment. Migration and redistribution of elements by atmospheric factors induces rock failure and extraction of elements into water sources. The majority of radwaste repository designs are designed to operate deep underground where eventual water ingress is expected. Further redistribution of elements is caused by living species. Different elements have varying importance and involvement in the life cycles of living organisms. The discussion concludes with the potential hazards of certain elements in the environment. Values of maximum permissible concentrations (MPC) or intervention levels (IL) are used to describe this quantity for every potential contaminant including radionuclides. These are given in regulatory documents both for air and drinking water. The index of potential hazard gives the maximum necessary dilution ratio to obtain drinking water. Dilution of contaminants to obtain noncontaminated media is the oldest and simplest disposal option. Waste contaminants do not necessarily dissolve completely in water, so the real or residual hazard of materials H(t) is much less than the potential one Hp(t). If the contaminants are in the form of aqueous solutions or readily soluble salts, the real hazard will equal the potential hazard.
An Introduction to Nuclear Waste Immobilisation
An Introduction to Nuclear Waste Immobilisation, 2019
An Introduction to Nuclear Waste Immobilisation
The IAEA Coordinated Research Project (CRP) on cementitious materials for radioactive waste manag... more The IAEA Coordinated Research Project (CRP) on cementitious materials for radioactive waste management involved many research organizations aiming to investigate the behaviour and performance of cementitious materials used in radioactive waste management system with various purposes and included waste packages, wasteforms and backfills as well as investigation of interactions and interdependencies of these individual elements during long-term storage and disposal. The IAEA CRP has facilitated the exchange of information and research co-operation in resolving similar problems between different institutions and contributed towards improving waste management practices, their efficiency and general enhancement of safety.
Elsevier eBooks, 2005
Publisher Summary This chapter discusses migration and redistribution of elements in the Earth... more Publisher Summary This chapter discusses migration and redistribution of elements in the Earth's environment. Volcanic activity, atmospheric factors; and anthropogenic because of the action of living species lead to migration and redistribution of elements in the Earth's environment. Migration and redistribution of elements by atmospheric factors induces rock failure and extraction of elements into water sources. The majority of radwaste repository designs are designed to operate deep underground where eventual water ingress is expected. Further redistribution of elements is caused by living species. Different elements have varying importance and involvement in the life cycles of living organisms. The discussion concludes with the potential hazards of certain elements in the environment. Values of maximum permissible concentrations (MPC) or intervention levels (IL) are used to describe this quantity for every potential contaminant including radionuclides. These are given in regulatory documents both for air and drinking water. The index of potential hazard gives the maximum necessary dilution ratio to obtain drinking water. Dilution of contaminants to obtain noncontaminated media is the oldest and simplest disposal option. Waste contaminants do not necessarily dissolve completely in water, so the real or residual hazard of materials H(t) is much less than the potential one Hp(t). If the contaminants are in the form of aqueous solutions or readily soluble salts, the real hazard will equal the potential hazard.
An Introduction to Nuclear Waste Immobilisation
An Introduction to Nuclear Waste Immobilisation, 2019
An Introduction to Nuclear Waste Immobilisation
The IAEA Coordinated Research Project (CRP) on cementitious materials for radioactive waste manag... more The IAEA Coordinated Research Project (CRP) on cementitious materials for radioactive waste management involved many research organizations aiming to investigate the behaviour and performance of cementitious materials used in radioactive waste management system with various purposes and included waste packages, wasteforms and backfills as well as investigation of interactions and interdependencies of these individual elements during long-term storage and disposal. The IAEA CRP has facilitated the exchange of information and research co-operation in resolving similar problems between different institutions and contributed towards improving waste management practices, their efficiency and general enhancement of safety.