Thermal Cycling Of Plutonium
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Thermal Cycling Of Plutonium
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Author : R. D. Nelson
language : en
Publisher:
Release Date : 1959
Thermal Cycling Of Plutonium written by R. D. Nelson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Nuclear reactors categories.
Thermal Cycling Of Plutonium Part I Observations Of The Physical Damage Resulting From Thermal Cycling Plutonium Through Its Low Temperature Phase Transformations
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Author :
language : en
Publisher:
Release Date : 1959
Thermal Cycling Of Plutonium Part I Observations Of The Physical Damage Resulting From Thermal Cycling Plutonium Through Its Low Temperature Phase Transformations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with categories.
Plutonium, thermally cycled through the low-temperature allotropic transformations, exhibited extensive physical damage. The physical damage was greater than that reported for any other metal or alloy. The extent of physical damage was determined by measurements of fluid displacement and the dimensional changes. The internal porosity was examined metallographically. Physical damage varied considerably, depending on the cycling conditions and the characteristics of the metal (particularly inclusions and casting imperfections). Observations showed that increasing the specimen size produced a greater decrease in density as a function of the number of cycles. The degree of void formation was directly proportional to volume change associated with the phase transformation. Other variables such as the length-diameter ratio (constant diameter) had little or no influence on the amount of physical damage. The dimensional growth was both radial and longitudinal. The tensile strength and the yield strength of tensile specimens cycled ten times between the gamnna and alpha phases were decreased to an average of 30,000 and 26,000 psi, respectively. (auth).
Effect Of Thermal Cycling On The Alpha Beta Transformation Temperature Of Plutonium
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Author :
language : en
Publisher:
Release Date : 1964
Effect Of Thermal Cycling On The Alpha Beta Transformation Temperature Of Plutonium written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.
Effects On The Long Term Storage Container By Thermal Cycling Alpha Plutonium
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Author :
language : en
Publisher:
Release Date : 1998
Effects On The Long Term Storage Container By Thermal Cycling Alpha Plutonium written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.
Experiments were conducted to determine the validity of the steady state temperature limit of 100 C established by the DOE-STD-3013-96 for storing alpha plutonium metal. Studies with an alpha plutonium ingot combined with strain gauge measurements indicate that the stainless steel storage container, yields very little (0.005 in.) to the expanding plutonium metal as it undergoes alpha beta phase transformation at temperatures above 112 C. Another experiment using an alpha plutonium rod for point loading of the container wall showed no measured deformation of the container. The results of strain measurements for alpha beta and beta alpha transformations for twenty five thermal cycles are reported. Finite element modeling using the measured data predicts that the compressive yield strength is 3,500 psi versus the literature value of 13,000 psi.
Thermal Cycling On Fatigue Failure Of The Plutonium Vitrification Melter
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Author :
language : en
Publisher:
Release Date : 2009
Thermal Cycling On Fatigue Failure Of The Plutonium Vitrification Melter written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
One method for disposition of excess plutonium is vitrification into cylindrical wasteforms. Due to the hazards of working with plutonium, the vitrification process must be carried out remotely in a shielded environment. Thus, the equipment must be easily maintained. With their simple design, induction melters satisfy this criterion, making them ideal candidates for plutonium vitrification. However, due to repeated heating and cooling cycles and differences in coefficients of thermal expansion of contacting materials fatigue failure of the induction melter is of concern. Due to the cost of the melter, the number of cycles to failure is critical. This paper presents a method for determining the cycles to failure for an induction melter by using the results from thermal and structural analyses as input to a fatigue failure model.
Plutonium Abstracts
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Author :
language : en
Publisher:
Release Date : 1964
Plutonium Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Plutonium categories.
Transformation Kinetics Of Plutonium
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Author :
language : en
Publisher:
Release Date : 1961
Transformation Kinetics Of Plutonium written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1961 with categories.
Isothermal reaction curves and T-T-T curves showing the effect of different variables on the beta-alpha transformations in plutonium are presented. Impurity content, stresses, beta heat-treating time and temperature, hydrostatic pressing, specimen size, and thermal cycling influenced the kinetics of the beta- alpha transformation. Decreasing the impurlty content increased the rate of transformation. High tensile stress retarded the beta-alpha transformation. Increasing the beta heat-treating time and temperature markedly decreased the rate of transformation. Hydrostatic pressing at 90,000 psi accelerated the beta- alpha transformation under pressure but decreased any subsequent beta-alpha transformations by as much as two orders of magnitude. Specimen size had no effect on the start of the transformation but increasing the specimen size from 0.010 to 0.37 inch decreased the rate of completion of transformation several orders of magnitude. Thermal cycling less than 15 cycles did not affect the rate of transformation. The density of high purity plutonium during hydrostatic pressing at l80 deg C and cooling under pressure increased from 19.60 to 19.65 g/ cm3to 19.70 to 19.75 g/cm3. This increase was shown to be attributed to decreasing the volume of microcracks rather than transformation of any metastable beta phase. A T-T-T curve of the alpha-beta transformation is given which shows the start of the transformation is 16 hours at 116.5 deg C with the rate decreasing extremely rapidly with decreasing temperature. The times for the start and completion of the transformation were significantly shorter than the early work reported. The faster rate was attributed to less impurities, The gamma-beta-alpha and alpha-beta-gamma transformations are discussed also. Isothermal reaction curves and T-T-T curves for these transformation are included. (auth).
Program Study Report Plutonium Fuel Cycle
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Author : F. W. Albaugh
language : en
Publisher:
Release Date : 1956
Program Study Report Plutonium Fuel Cycle written by F. W. Albaugh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1956 with Nuclear reactors categories.
Safety Issues Associated With Plutonium Involvement In The Nuclear Fuel Cycle
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Author : Theodore A. Parish
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Safety Issues Associated With Plutonium Involvement In The Nuclear Fuel Cycle written by Theodore A. Parish and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
The "VOLGA" conferences, hosted in odd-numbered years by the Department of Theoretical and Experimental Reactor Physics of the Moscow Engineering Physics Institute (MEPhI), are some of the most prestigious technical meetings held in Russia. Traditionally, these conferences present the opportunity for reactor physicists from around the world to gather at MEPhI's holiday camp on the banks of the Volga river (near Tver) to exchange ideas and explore innovative concepts related to nuclear power development. In 1997, NATO became involved in the "VOLGA" meetings for the first time by co-sponsoring "VOLGA97" as an advanced research workshop. This workshop broke with tradition a bit in that the venue was moved from MEPhI's holiday camp to a location nearer Moscow. The workshop program was effectively organized in order to cover a broad range of topics relating to the theme of the meeting. Generally, the papers concerned safety related questions associated with utilizing both weapons-grade and reactor-grade plutonium in the nuclear fuel cycle, including facility requirements, licensing issues, proliferation risks, and a variety of advanced concepts for alternative fuel cycles. The program contained a total of ninety-nine papers presented in five days of sessions.
The Thermal Expansion Of Plutonium Metal Below 300 K
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Author : Thomas A. Sandenaw
language : en
Publisher:
Release Date : 1960
The Thermal Expansion Of Plutonium Metal Below 300 K written by Thomas A. Sandenaw and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Expansion (Heat) categories.