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RAPID SEPARATION METHOD FOR ACTINIDES IN EMERGENCY SOIL SAMPLES

Description: A new rapid method for the determination of actinides in soil and sediment samples has been developed at the Savannah River Site Environmental Lab (Aiken, SC, USA) that can be used for samples up to 2 grams in emergency response situations. The actinides in soil method utilizes a rapid sodium hydroxide fusion method, a lanthanum fluoride soil matrix removal step, and a streamlined column separation process with stacked TEVA, TRU and DGA Resin cartridges. Lanthanum was separated rapidly and effe… more
Date: November 9, 2009
Creator: Maxwell, S.; Culligan, B. & Noyes, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Strategic Design and Optimization of Inorganic Sorbents for Cesium, Strontium and Actinides

Description: The primary objective of the Notre Dame component of the project was computational in nature. The goal was to provide a design tool for the synthesis of optimized sorbents for the removal of cesium, strontium and actinides from nuclear waste solutions. Molecular modeling enables us to observe and better understand the molecular level interactions that govern the selectivity of specific radionuclides in a particular sorbent. The research focused on the development and validation of a suitable an… more
Date: November 9, 2009
Creator: Maginn, Edward J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radionuclide Partitioning in an Underground Nuclear Test Cavity

Description: In 2004, a borehole was drilled into the 1983 Chancellor underground nuclear test cavity to investigate the distribution of radionuclides within the cavity. Sidewall core samples were collected from a range of depths within the re-entry hole and two sidetrack holes. Upon completion of drilling, casing was installed and a submersible pump was used to collect groundwater samples. Test debris and groundwater samples were analyzed for a variety of radionuclides including the fission products {sup 9… more
Date: January 9, 2009
Creator: Rose, T. P.; Hu, Q.; Zhao, P.; Conrado, C. L.; Dickerson, R.; Eaton, G. F. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Acquisition of Single Crystal Growth and Characterization Equipment

Description: Final Report for DOE Grant No. DE-FG02-04ER46178 'Acquisition of Single Crystal Growth and Characterization Equipment'. There is growing concern in the condensed matter community that the need for quality crystal growth and materials preparation laboratories is not being met in the United States. It has been suggested that there are too many researchers performing measurements on too few materials. As a result, many user facilities are not being used optimally. The number of proficient crystal … more
Date: December 9, 2008
Creator: Maple, M. Brian & Zocco, Diego A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Surrogate Method: Past, Present and Future

Description: The STARS/LiBerACE collaboration has been exploring the surrogate technique with success in the actinide region. This method uses a direct reaction to measure the decay probability of the same compound nucleus produced via a neutron-induced channel. This paper serves as an overview of these activities. Using the STARS array at 88-inch Cyclotron at Lawrence Berkeley National Laboratory we have explored the following surrogate reactions: {sup 234}U({alpha}, {alpha}{prime}f), {sup 235}U({sup 3}He,… more
Date: January 9, 2008
Creator: Lesher, S. R.; Bernstein, L. A.; Burke, J. T.; Lyles, B. F.; Clark, R. M.; Fallon, P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Characterization of a mixed salt of 1-hydroxy-pyridin-2-one Pu(IV)complexes

Description: Most expert analyses of the projected world energy needs show utilization of nuclear energy will be essential for the next few decades, and hence the need to support this technology grows. But as one measure of the supporting science base of this field, as of December 2006, only 25 Pu containing structures were in the Cambridge Structural Database, as compared to 21,807 for Fe. A comparison of the rate of addition to this knowledge base reveals that approximately 500 Fe structures are registere… more
Date: January 9, 2007
Creator: Gorden, Anne E.V.; Xu, Jide; Szigethy, Geza; Oliver, Allen; Shuh,David K. & Raymond, Kenneth N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radioanalytical Chemistry for Automated Nuclear Waste Process Monitoring

Description: This research program is directed toward rapid, sensitive, and selective determination of beta and alpha-emitting radionuclides such as 99Tc, 90Sr, and trans-uranium (TRU) elements in low activity waste (LAW) processing streams. The overall technical approach is based on automated radiochemical measurement principles. Nuclear waste process streams are particularly challenging for rapid analytical methods due to the complex, high- ionic-strength, caustic brine sample matrix, the presence of inte… more
Date: June 9, 2003
Creator: Egorov, Oleg B.; Grate, Jay W. & DeVol, Timothy A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical aspects of actinides in the geosphere: towards a rational nuclear materials management

Description: A complete understanding of actinide interactions in the geosphere is paramount for developing a rational Nuclear and Environmental Materials Management Policy. One of the key challenges towards understanding the fate and transport of actinides is determining their speciation (i.e., oxidation state and structure). Since an element's speciation directly dictates physical properties such as toxicity and solubility, this information is critical for evaluating and controlling the evolution of an ac… more
Date: February 9, 2001
Creator: Allen, P & Sylwester, E
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Uranium in the Savannah River Site environment

Description: The purpose of this report is to consolidate the history of environmental uranium studies conducted by SRS and to describe the status of uranium in the environment. The report is intended to be a living document'' that will be updated periodically. This draft issue, February 1992, documents studies that occurred from 1954 to 1989. Data in this report are taken primarily from annual and semiannual environmental reports for SRS. Semiannual reports were published from 1954 through 1962. Annual rep… more
Date: December 9, 1992
Creator: Evans, A. G.; Bauer, L. R.; Haselow, J. S.; Hayes, D. W.; Martin, H. L.; McDowell, W. L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Steam explosion analysis in support of the SRS reactor safety assessment

Description: This report describes the application of two steam explosion models in support of the Probabilistic Risk Assessment (PRA) for the Savannah River Reactors. Theoretical models are required to estimate steam explosion yields in terms of kinetic energy, pressure shock and steam generated by the event. These quantities are used in the PRA to determine fission product barrier integrity in the reactor confinement following a hypothetical steam explosion. The basic preconditions for a steam explosion a… more
Date: October 9, 1992
Creator: Vonderfecht, B.E. & Smith, D.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of filter media for clarification of partially dissolved residues containing plutonium

Description: A common process in the chemical industry employs the leaching of a desirable component from an insoluble substrate, followed by filtration to produce a clarified solution of the desirable component and a discardable residue. The work described here involved evaluating sintered metal filter media for separating dissolved plutonium from undissolved residues generated at various locations owned by the Department of Energy throughout the United States. The work was performed during a six-week assi… more
Date: October 9, 1989
Creator: Foley, E.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiation transmission measurements on a small warm ion chamber

Description: Measurements were made on a small warm ion chamber (WIC) to determine if high energy neutrons travelling up the gaps of the SLD end plates may pose a problem during an accident. Measurement results are given through gaps, through the WIC body thickness. Photon and neutron penetration through end caps and the main body of the WIC are then extrapolated to apply to the SLD. (LEW)
Date: October 9, 1986
Creator: Jenkins, T. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Beta-delayed fission calculations for the astrophysical r-process

Description: We discuss RPA calculations of the Gamow-Teller properties of neutron-rich nuclei to study the effect of ..beta..-delayed fission and neutron emission on the production of Th, U and Pu chronometric nuclei in the astrophysical r-process. We find significant differences in the amount of ..beta..-delayed fission when compared with the recent calculations of Thielemann et al. (1983). In the simplest case of a constant abundance along the r-process path, however, the inferred production ratios in bo… more
Date: October 9, 1985
Creator: Meyer, B. S.; Howard, W. M.; Mathews, G. J.; Moeller, P. & Takahashi, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neptunium separations

Description: Two procedures for the separation of Np are presented; the first involves separation of /sup 239/Np from irradiated /sup 238/U, and the second involves separation of /sup 237/Np from a solution representing that from a dissolved fuel element.
Date: May 9, 1983
Creator: Wild, John F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Personnel neutron dosimetry studies at the Lawrence Livermore National Laboratory

Description: A study was conducted to determine the effect of phantom size, shape and composition on the response of an albedo neutron dosimeter. The most important feature was the shape. The dose equivalent rate from a californium neutron source was determined. Ten different dose rates were determined which varied from 2.39 to 3.02 rem/h for the CF source used. (ACR)
Date: June 9, 1981
Creator: Hankins, D.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Computerized mathematical model for the anion exchange processing of plutonium(IV)

Description: A computerized mathematical model for anion exchange processing of plutonium(IV) was adopted from a previously written code. The model was verified to predict, within +-30 percent, a profile of plutonium breakthrough for the sorption process on Dowex 1-X4 anion exchange resin. The program was modified to incorporate column washing and elution logic. Experimental washing and elution data were in satisfactory agreement with predicted data. Provisions for changing the flow rate during the course o… more
Date: May 9, 1977
Creator: Navratil, J. D.; Proctor, S. G. & Kirkby, L. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radioactive liquid wastes discharged to ground in the 200 Areas during 1976

Description: An overall summary is presented giving the radioactive liquid wastes discharged to ground during 1976 and since startup (for both total and decayed depositions) within the Production and Waste Management Division control zone (200 Area plateau). Overall summaries are also presented for 200 East Area and for 200 West Area. The data contain an estimate of the radioactivity discharged to individual ponds, cribs and specific retention sites within the Production and Waste Management Division during… more
Date: May 9, 1977
Creator: Mirabella, J.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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General Chemistry Division quarterly report, October--December 1976

Description: Reported are: determination of imperfections on a laser spatial-filter lens; oxidation of U in O/sub 2/--N/sub 2/ mixtures; use of polarized x-rays to improve detection limits in energy-dispersive x-ray fluorescence analysis; detection of less than 1 ppT of organic compounds by laser-induced molecular fluorescence; a Stark-shift laser spectrometer; photoionization thresholds of Nd, Sm, Eu, Dy, and Er; response tests of chloride ion-selective electrodes; chemical analyses of explosive composites… more
Date: March 9, 1977
Creator: Harrar, J. E. & Lentzner, H. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Is plutonium really necessary

Description: Not all activities associated with nuclear power contribute equally to proliferation potential, but some fuel-cycle activities (i.e., reprocessing) are considered too dangerous to be permitted in non-weapons countries. This paper assesses the feasibility of keeping Pu out of the nuclear fuel cycle. It is pointed out that there is no technical necessity of using Pu as nuclear fuel so long as /sup 235/U is available. Analysis of the economics of recycling spent fuel products in LWRs in the U.S. s… more
Date: September 9, 1976
Creator: Taylor, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mirror hybrid reactor optimization studies

Description: A system model of the mirror hybrid reactor has been developed. The major components of the model include (1) the reactor description, (2) a capital cost analysis, (3) various fuel management schemes, and (4) an economic analysis that includes the hybrid plus its associated fission burner reactors. The results presented describe the optimization of the mirror hybrid reactor, the objective being to minimize the cost of electricity from the hybrid fission-burner reactor complex. We have examined … more
Date: September 9, 1976
Creator: Bender, D. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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