Recent Accomplishments in the Irradiation Testing of Engineering-Scale Monolithic Fuel Specimens

Recent Accomplishments in the Irradiation Testing of Engineering-Scale Monolithic Fuel Specimens

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Published: 2012

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The US fuel development team is focused on qualification and demonstration of the uranium-molybdenum monolithic fuel including irradiation testing of engineering-scale specimens. The team has recently accomplished the successful irradiation of the first monolithic multi-plate fuel element assembly within the AFIP-7 campaign. The AFIP-6 MKII campaign, while somewhat truncated by hardware challenges, exhibited successful irradiation of a large-scale monolithic specimen under extreme irradiation conditions. The channel gap and ultrasonic data are presented for AFIP-7 and AFIP-6 MKII, respectively. Finally, design concepts are summarized for future irradiations such as the base fuel demonstration and design demonstration experiment campaigns.


Unmaking the Bomb

Unmaking the Bomb

Author: Harold A. Feiveson

Publisher: MIT Press

Published: 2016-09-02

Total Pages: 293

ISBN-13: 0262529726

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A new approach to nuclear disarmament, nonproliferation, and the prevention of nuclear terrorism that focuses on controlling the production and stockpiling of nuclear materials. Achieving nuclear disarmament, stopping nuclear proliferation, and preventing nuclear terrorism are among the most critical challenges facing the world today. Unmaking the Bomb proposes a new approach to reaching these long-held goals. Rather than considering them as separate issues, the authors—physicists and experts on nuclear security—argue that all three of these goals can be understood and realized together if we focus on the production, stockpiling, and disposal of plutonium and highly enriched uranium—the fissile materials that are the key ingredients used to make nuclear weapons. The authors describe the history, production, national stockpiles, and current military and civilian uses of plutonium and highly enriched uranium, and propose policies aimed at reducing and eventually eliminating these fissile materials worldwide. These include an end to the production of highly enriched uranium and plutonium for weapons, an end to their use as reactor fuels, and the verified elimination of all national stockpiles.


Small-scale Specimen Testing of Monolithic U-Mo Fuel Foils

Small-scale Specimen Testing of Monolithic U-Mo Fuel Foils

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Published: 2008

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The objective of this investigation is to develop a shear punch testing (SPT) procedure and standardize it to evaluate the mechanical properties of irradiated fuels in a hot-cell so that the tensile behavior can be predicted using small volumes of material and at greatly reduced irradiation costs. This is highly important in the development of low-enriched uranium fuels for nuclear research and test reactors. The load-displacement data obtained using SPT can be interpreted in terms of and correlated with uniaxial mechanical properties. In order to establish a correlation between SPT and tensile data, sub-size tensile and microhardness testing were performed on U-Mo alloys. In addition, efforts are ongoing to understand the effect of test parameters (such as specimen thickness, surface finish, punch-die clearance, crosshead velocity and carbon content) on the measured mechanical properties, in order to rationalize the technique, prior to employing it on a material of unknown strength.


Nuclear Terrorism and Global Security

Nuclear Terrorism and Global Security

Author: Alan J. Kuperman

Publisher: Routledge

Published: 2013-04-17

Total Pages: 257

ISBN-13: 1135105863

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This book examines the prospects and challenges of a global phase-out of highly enriched uranium—and the risks of this material otherwise being used by terrorists to make atom bombs. Terrorist groups, such as Al Qaeda, have demonstrated repeatedly that they seek to acquire nuclear weapons. Unbeknownst even to many security specialists, tons of bomb-grade uranium are trafficked legally each year for ostensibly peaceful purposes. If terrorists obtained even a tiny fraction of this bomb-grade uranium they could potentially construct a nuclear weapon like the one dropped on Hiroshima that killed tens of thousands. Nuclear experts and policymakers have long known of this danger but – so far – have taken only marginal steps to address it. This volume begins by highlighting the lessons of past successes where bomb-grade uranium commerce has been eliminated, such as from Argentina’s manufacture of medical isotopes. It then explores the major challenges that still lie ahead: for example, Russia’s continued use of highly enriched uranium (HEU) in dozens of nuclear facilities. Each of the book’s thirteen case studies offers advice for reducing HEU in a specific sector. These insights are then amalgamated into nine concrete policy recommendations for U.S. and world leaders to promote a global phase-out of bomb-grade uranium. This book will be of much interest to students of nuclear proliferation, global governance, international relations and security studies.


The Metallurgy of Zirconium

The Metallurgy of Zirconium

Author: Benjamin Lustman

Publisher:

Published: 2013-05

Total Pages: 794

ISBN-13: 9781258715175

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Contributing Authors Include H. Etherington, R. C. Dalzell, D. W. Lillie And Others.


Bulletin of the Atomic Scientists

Bulletin of the Atomic Scientists

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Published: 1970-06

Total Pages: 116

ISBN-13:

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The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.


Advances in High Temperature Gas Cooled Reactor Fuel Technology

Advances in High Temperature Gas Cooled Reactor Fuel Technology

Author: International Atomic Energy Agency

Publisher:

Published: 2012-06

Total Pages: 639

ISBN-13: 9789201253101

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This publication reports on the results of a coordinated research project on advances in high temperature gas cooled reactor (HTGR) fuel technology and describes the findings of research activities on coated particle developments. These comprise two specific benchmark exercises with the application of HTGR fuel performance and fission product release codes, which helped compare the quality and validity of the computer models against experimental data. The project participants also examined techniques for fuel characterization and advanced quality assessment/quality control. The key exercise included a round-robin experimental study on the measurements of fuel kernel and particle coating properties of recent Korean, South African and US coated particle productions applying the respective qualification measures of each participating Member State. The summary report documents the results and conclusions achieved by the project and underlines the added value to contemporary knowledge on HTGR fuel.