58 research outputs found
Initial Results From Dissolution Testing of Spent Fuel Under Acidic Conditions
No full textAbstractFlowthrough dissolution tests using solutions with pH in the range 2 to 7 have been conducted on a moderate burnup Light Water Reactor spent fuel. Such low pH conditions have been modeled as possibly occurring in a failed waste package at the proposed repository at Yucca Mountain. The release oftotal uranium, 99Tc, 90Sr, 137Cs, and 239&240Pu were measured for up to 90% total reaction of the specimens. The reaction rates, determined both from the cumulative release and the release normalized to surface area, were found to decrease with increasing pH and with increasing extent of reaction. The implications to instantaneous release and long-term behavior ina geologic repository are discussed.</jats:p
Brutal Bodies: Exploring transgression through the fiction of Chuck Palahniuk, Poppy Z. Brite, and Bret Easton Ellis
No full textThis thesis explores how American transgressive fiction of the 1990s represents and interrogates transgressive processes in its extra-textual context. It shows in what ways transgressive fiction visualizes how transgression functions, not simply as a counter-cultural phenomenon, but more as a central social mechanism. The thesis makes four contributions. First, it critically assesses existing definitions of transgression as counter-cultural, instead conceptualizing transgression as a mechanism which (re)develops central social ideologies. The project traces how the transgression of ideological boundaries forms a cyclical process which (re)produces ideological frameworks. Second, the thesis uses this re-definition to explore 1990s transgressive fiction in its social context. The study investigates how the late 1980s, characterized by phenomena such as neoliberal politics and the HIV/AIDS epidemic, inspired transgressive fiction produced during the 1990s. Thirdly, the thesis constructs an interdisciplinary methodological approach to dissect how the body came to play a crucial role in this context as a site through which transgression occurred. Drawing from biopolitical and queer theory, the study deepens the understanding of transgression as both a literary phenomenon and a socio-political process. Finally, the thesis compares the work of three transgressive authors whose work has not yet been analysed together in depth. It analyses the fiction of Bret Easton Ellis and Chuck Palahniuk in combination with that of Poppy Z. Brite, an author who has, in comparison, been neglected by academia. The analysis results in an increased understanding of the dynamics of transgression in 1990s American fiction and society, showing that transgression is a cyclical process which reproduces and subsequently dissolves ideological boundaries, a practice which results in a temporary crisis which ultimately enables the (re)development of ideologies. The thesis concludes that transgressive fiction of the period represents, exaggerates and interrogates transgression as a cyclical process which (re)configures ideologies in its extra-textual context
Publisher’s Note: “Probing the oxygen environment in UO22+ by solid-state O17 nuclear magnetic resonance spectroscopy and relativistic density functional calculations” [J. Chem. Phys. 132, 084501 (2010)]
No full textProbing the oxygen environment in UO22+ by solid-state O17 nuclear magnetic resonance spectroscopy and relativistic density functional calculations
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Monitoring bromide effect on radiolytic yields using<i>in situ</i>observations of uranyl oxide precipitation in the electron microscope
No full textDuring electron microscopy observations of uranium-bearing phases and solutions in a liquid cell, the electron beam induced radiolysis causes changes in the chemistry of the system.</p
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Redox-dependent solubility of technetium in low activity waste glass
No full textSequestration of radioactive iodine in silver-palladium phases in commercial spent nuclear fuel
No full textCosmology, Cosmic Dust, and Stellar Dimming
No full textA cosmology model is derived, forming an expanding, curved, unbounded, and finite universe resembling a 3-dimensional hypersphere with positive curvature. Growth, curvature, and the expansion rate are forced by the initial conditions accompanying the emergence of space and time from the “big bang” singularity. The model generates several variables (past and present stellar distance, luminosity distance, time of emission, photon path, recession velocity, radiation temperature, universe circumference, and Hubble parameter) which are sole functions of redshift z (readily measured by spectroscopic or photometric means). The model also presents two concepts which replace the need for cosmic inflation and dark energy.
Equations for luminosity distance d and Hubble parameter H compare extremely well with 28 values of BAO measured data over the redshift range 0.07The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Effect of Technetium-99 sources on its retention in low activity waste glass
No full textSmall-scale crucible melting tests on simulated waste glass were performed with technetium-99 (Tc-99) introduced as different species in a representative low activity waste simulant. The glass saw an increase in Tc-99 retention when TcO2 center dot 2H(2)O and various Tc-minerals containing reduced tetravalent Tc were used compared to tests in which pertechnetate with heptavalent Tc was used. We postulate that the increase of Tc retention is likely caused by different reaction paths for Tc incorporation into glass during early stages of melting, rather than the low volatility of reduced tetravalent Tc compounds, which has been a generally accepted idea. Additional studies are needed to clarify the exact mechanisms relevant to the effect of reduced Tc compounds on Tc incorporation into or volatilization from the glass melt. (c) 2018 Elsevier B.V. All rights reserved.11Nsciescopu
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