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Tritium and Helium-3 in Metals

Author: Rainer Lässer

Publisher: Springer Science & Business Media

Published: 2013-03-13

Total Pages: 167

ISBN-13: 364273510X

Hydrogen can behave as an alkaline metal or a halogen and can react with nearly all elements of the periodic table. This explains the large number of metal hydrides. Since T. Graham's first observation of the absorption of hydrogen in palladium in 1866 the behaviour of hydrogen in metals has been studied very extensively. The interest was motivated by the possible application of metal-hydrogen systems in new technologies (e.g., moderator material in nuclear fission reactors, reversible storage material for thermal energy and large amounts of hydrogen) and by the fact that metal hydrides show very exciting physical properties (e.g., superconductivity, quantum diffusion, order-disorder transitions, phase diagrams, etc.). Many of these properties have been determined for the stable hydrogen isotopes Hand D in various metals. In comparison, very little is known about the behaviour of the ra dioactive isotope tritium in metals. This book is a first attempt to summarize part of the knowledge of tritium gained in the last few years. In addition to the task of presenting the properties of tritium in metals, I have tried to compare these data with those of protium and deuterium. Furthermore, helium-3 is connected inse parably with tritium via the tritium decay. Therefore one chapter of this book is solely devoted to the curious properties of helium in metals caused mainly by its negligible solubility.

Tritium

Author: Marija M. Janković

Publisher:

Published: 2018

Total Pages: 295

ISBN-13: 9781536135077

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Tritium, 3H (T), is a radioactive isotope of hydrogen. Naturally occurring tritium is rare on Earth, where trace amounts are formed by the interaction of the atmosphere with cosmic rays. Once formed in the stratosphere, the tritium atoms have a large amount of kinetic energy. At a pressure lower than atmospheric, they react with the oxygen, creating a stable radical HO2. This radical reacts with ozone, following the photochemical reaction of decomposition TO2 to HTO. Once tritium is incorporated into the water molecule, then it falls to the Earth's surface as precipitation or snow, thus entering into the natural hydrological cycle.With a half-life of 12.32 years and a maximum energy of 18 keV beta radiation, this radioisotope is not dangerous externally, but it can be a radiation hazard when inhaled, ingested via food or water, or absorbed through the skin. The biological half-life ranges from around 7 to 14 days, so bioaccumulation of tritium is not a significant concern.Tritium is a very useful hydro-geological tracer and can be successfully applied in assessing the age of groundwater and residence times of continental hydrologic systems or as an oceanic transient tracer. Tritium releases from nuclear installations may be useful for some applications as a powerful local tracer, but on the other hand such releases may affect the reliability and accuracy of tritium use as a global tracer. For this reason, measuring of the activity concentrations of tritium is regularly a part of every national and/or international monitoring programme. Tritium is also used in radio luminescent light sources for watches and various instruments, and, along with deuterium, as a fuel for nuclear fusion reactors with applications in energy generation and weapons.The amount of tritium that appears in the atmosphere as a product of human activity comes from: nuclear reactors, production of nuclear weapons, atmospheric and above ground nuclear explosions, heavy water and tritium plants, and plants for tritium separation. The use of tritium labeled compounds for medical and research purposes is also a possible source of contamination by tritium.Knowledge of the tritium concentration distribution in the environment, awareness of various anthropogenic sources of tritium, and optimization of measurement conditions are of great importance in various applications and in preserving human health.

Preparation of Compounds Labeled with Tritium and Carbon-14

Author: Rolf Voges

Publisher: John Wiley & Sons

Published: 2009-03-12

Total Pages: 682

ISBN-13: 9780470743430

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Compounds labeled with carbon-14 and tritium are indispensable tools for research in biomedical sciences, discovery and development of pharmaceuticals and agrochemicals. Preparation of Compounds Labeled with Tritium and Carbon-14 is a comprehensive, authoritative and up-to-date discussion of the strategies, synthetic approaches, reactions techniques, and resources for the preparation of compounds labeled with either of these isotopes. A large number of examples are presented for the use of isotopic sources and building blocks in the preparation of labeled target compounds, illustrating the range of possibilities for embedding isotopic labels in selected moieties of complex structures. Topics include: Formulation of synthetic strategies for preparing labeled compounds Isotope exchange methods and synthetic alternatives for preparing tritiated compounds In-depth discussion of carbon-14 building blocks and their utility in synthesis Preparation of enantiomerically pure isotopically labeled compounds Applications of biotransformations Preparation of Compounds Labeled with Tritium and Carbon-14 is an essential guide to the specialist strategies and tactics used by chemists to prepare compounds tagged with theradioactive atoms carbon-14 and tritium.

Tritium on Ice

Author: Kenneth D. Bergeron

Publisher: MIT Press

Published: 2004-09-17

Total Pages: 252

ISBN-13: 9780262261722

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The dangers of a United States government plan to abandon its fifty-year policy of keeping civilian and military uses of nuclear technology separate. In December 1998, Energy Secretary Bill Richardson announced that the U.S. planned to begin producing tritium for its nuclear weapons in commercial nuclear power plants. This decision overturned a fifty-year policy of keeping civilian and military nuclear production processes separate. Tritium, a radioactive form of hydrogen, is needed to turn A-bombs into H-bombs, and the commercial nuclear power plants that are to be modified to produce tritium are called ice condensers. This book provides an insider's perspective on how Richardson's decision came about, and why it is dangerous. Kenneth Bergeron shows that the new policy is unwise not only because it undermines the U.S. commitment to curb nuclear weapons proliferation but also because it will exacerbate serious safety problems at these commercial power facilities, which are operated by the Tennessee Valley Authority and are among the most marginal in the United States. The Nuclear Regulatory Commission's review of the TVA's request to modify its plants for the new nuclear weapons mission should attract significant attention and opposition. Tritium on Ice is part expose, part history, part science for the lay reader, and part political science. Bergeron's discussion of how the issues of nuclear weapons proliferation and nuclear reactor safety have become intertwined illuminates larger issues about how the federal government does or does not manage technology in the interests of its citizens and calls into question the integrity of government-funded safety assessments in a deregulated economy.

Tritium: Fuel of Fusion Reactors

Author: Tetsuo Tanabe

Publisher: Springer

Published: 2016-12-05

Total Pages: 365

ISBN-13: 4431564608

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This book focuses on tritium as a fuel for fusion reactors and a next-generation energy source. Following an introduction of tritium as a hydrogen radioisotope, important issues involved in establishing safe and economical tritium fuel cycles including breeding for a fusion reactor are summarized; these include the handling of large amounts of tritium: confinement, leakage, contamination, permeation, regulation and tritium accountancy, and impacts on surrounding areas. Targeting and encouraging the students and technicians who will design and operate fusion reactors in the near future, this book offers a valuable resource on tritium science and technology.

Tritium Isotope Separation

Author: Gheorghe Vasaru

Publisher: CRC Press

Published: 1993-03-25

Total Pages: 330

ISBN-13: 9780849343223

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Tritium Isotope Separation is the first book to present a current overview of the separation processes for tritium isotopes. The book consists of two parts. Part I explores the sources of tritium and the evolution of the world's tritium inventory. Part II describes the processes and plants used for tritium isotope separation, enrichment methods for tritium for analytical purposes, methods for recovering and enriching tritium from nuclear and thermonuclear plants, and the laser method. The book in general emphasizes applications, performance, characterization, laboratory experiments, pilot plants and industrial production, reliability, and cost. An author index, subject index, list of acronyms and abbreviations, and glossary have been included to make the book an even more valuable reference. Tritium Isotope Separation will be an essential book for all nuclear energy engineers, nuclear physicists, and others working with various aspects of isotope separation science.

Tritium in Fusion

Author: Silvano Tosti

Publisher:

Published: 2013

Total Pages: 0

ISBN-13: 9781624172700

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Tritium is a radioactive hydrogen isotope that is of interest for both civil and military applications. Most of tritium is used for the realisation and the maintenance of fission and fusion nuclear weapons while only a minor fraction of tritium is commercially used. Among the non-military uses; medical diagnostic and research in pharmaceutical laboratories are discussed. For research purposes, tritium is also used in fusion power machines and, in particular, the development of processes for tritium recovery in the fusion fuel cycle has been the object of significant technological improvements. This book provides an overview on the processes for the production and treatment of tritium in nuclear fusion machines as well as the aspects of measurement, dose assessment and safety of tritium with a focus on the impact to human health and the environment.

International Control of Tritium for Nuclear Nonproliferation and Disarmament

Author: Martin B. Kalinowski

Publisher: CRC Press

Published: 2004-03-29

Total Pages: 256

ISBN-13: 0203569334

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Tritium is used by all nuclear weapons states to increase the explosive yield of atomic bombs and to miniaturize them. However, this radioactive material has not yet been put under appropriate international control comparable to the nuclear safeguards applied for plutonium and uranium. It is a neglected material in efforts to control the spread and