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Prediction of the migration of several radionuclides in ocean sediment with the computer code IONMIG: a preliminary report

Description: A computer code, IONMIG, which is used to calculate the far-field transport of radionuclides through ocean sediment by diffusion and convection is described. The code uses a two-dimensional, axisymmetric, explicit finite difference formulation. Preliminary results for several species (Cs, Pu, I, Tc) are given.
Date: May 1, 1980
Creator: Russo, A.J.
Partner: UNT Libraries Government Documents Department
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Transuranium Processing Plant semiannual report of production, status, and plans for period ending June 30, 1977

Description: During the period January 1, 1977, through June 30, 1977, the following amounts of transuranium elements were recovered from 12 irradiated HFIR targets: 0.1g /sup 243/Am, 21g /sup 244/Cm, 29.5 mg /sup 249/Bk, 288 mg /sup 252/Cf, 1.48 mg /sup 253/Es, and 0.7 pg /sup 257/Fm. One batch of high-purity /sup 248/Cm (approximately 50 mg) was separated from /sup 252/Cf. Twenty-three shipments were made from TRU during the period; recipients and the amounts of nuclides are tabulated. Five HFIR targets, … more
Date: December 1, 1977
Creator: King, L. J.; Bigelow, J. E. & Collins, E. D.
Partner: UNT Libraries Government Documents Department
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The Isotopes of Americium

Description: Three new americium activities (Am{sup 238}?, Am{sup 243}, and Am{sup 244?}, the latter two formed by n,{gamma} reactions) are described and some additional information is given on previously reported americium isotopes.
Date: April 11, 1950
Creator: Street, K.; Ghiroso, A. & Seaborg, G. T.
Partner: UNT Libraries Government Documents Department
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Airborne radioactive effluent study at the Savannah River Plant

Description: Under the Clean Air Act, Sections 112 and 122 as amended in 1977, the Office of Radiation Programs (OPR) of the United States Environmental Protection Agency is currently developing standards for radionuclides emitted to the air by several source categories. In order to confirm source-term measurements and pathway calculations for radiation exposures to humans offsite, the ORP performs field studies at selected facilities that emit radionuclides. This report describes the field study conducted … more
Date: July 1, 1984
Creator: Blanchard, R.L.; Broadway, J.A.; Sensintaffar, E.L.; Kirk, W.P.; Kahn, B. & Garrett, A.J.
Partner: UNT Libraries Government Documents Department
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Transuranium processing plant report of production, status, and plans for the period January 1, 1978--September 30, 1978

Description: During this period transuranium elements were obtained from 13 irradiated HFIR targets. The final purifications of three batches of /sup 248/Cm were completed. Forty-two product shipments were made from TRU. Six HFIR targets were fabricated; each contained approximately 2 g of /sup 243/Am and 7.5 g of cerium. The precision of the fast-neutron counting system in the TURF Californium Facility was improved sufficiently to permit assay of the /sup 252/Cf content in pellets, sources, and shipping pa… more
Date: June 1, 1979
Creator: King, L. J.; Bigelow, J. E. & Collins, E. D.
Partner: UNT Libraries Government Documents Department
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Transuranium processing plant semiannual report of production, status, and plans for period ending December 31, 1977

Description: Transuranium elements were obtained from 13 irradiated HFIR targets. One batch of high-purity /sup 248/Cm (approximately 75 mg) was separated from /sup 252/Cf. Eighteen shipments were made from TRU during the period. Seven HFIR targets, each containing 8 to 9 g of curium, were fabricated. A new scrubber system was installed in the dissolver off-gas (DOG) stream to remove the bulk of the /sup 131/I and to reduce the amount sorbed in the Hopcalite--charcoal system. During TRU target Campaign 53, … more
Date: August 1, 1978
Creator: King, L. J.; Bigelow, J. E. & Collins, E. D.
Partner: UNT Libraries Government Documents Department
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Solubility of AmOHCO sub 3 in aqueous solution under atmospheric conditions

Description: Modeling calculations on the solubility of americium have indicated that basic americium carbonate, and not americium trihydroxide, is the solubility-controlling solid in the pH range from 6 to 10 under the influence of atmospheric CO{sub 2}. The solubility of crystalline {sup 243}AmOHCO{sup 3} has been investigated in batch experiments in near-neutral and basic solutions as a function of dissolution time in 0.1 M NaClO{sup 4} at room temperature under oxic conditions. After the solutions reach… more
Date: December 1, 1987
Creator: Nitsche, H.
Partner: UNT Libraries Government Documents Department
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Evaluation of low-level waste analysis using the MADAM system

Description: Previously, the important hardware features and capabilities for the Multiple Assay Dual Analysis Measurement (MADAM) system were reported. MADAM is a combined low-level and transuranic waste assay system. The system integrated commercially available Segmented Gamma Scanner (SGS) capability together with multienergy X-ray and gamma-ray analysis to measure these two waste forms. In addition, the system incorporated a small neutron slab detector to satisfy safeguards concerns and high resolution … more
Date: August 1, 1994
Creator: Foster, L. A.; Wachter, J. R. & Hagan, R. C.
Partner: UNT Libraries Government Documents Department
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Estimation of Ni{sup 63}, Pu{sup 241}, Pu{sup 242} and Am{sup 243} from Co{sup 60}, Pu{sup 239}, and Cm{sup 244} activities in groundwater samples

Description: The Part B Permit for F&H Seepage Basins calls for analysis of several constituents of concern in groundwater monitoring wells. Four of these analytes are the radionuclides Ni{sup 63}, Pu{sup 241}, Pu{sup 242}, and Am{sup 243}. These are currently not being analyzed due to their very difficult, tedious analytical schemes coupled with their relatively low activity values. This report demonstrates how the activity value for Ni{sup 63}, a week beta emitter, can be estimated from that of Co{sup 60}… more
Date: May 14, 1993
Creator: Holcomb, H. P.
Partner: UNT Libraries Government Documents Department
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Solubility of AmOHCO{sub 3} in aqueous solution under atmospheric conditions

Description: Modeling calculations on the solubility of americium have indicated that basic americium carbonate, and not americium trihydroxide, is the solubility-controlling solid in the pH range from 6 to 10 under the influence of atmospheric CO{sub 2}. The solubility of crystalline {sup 243}AmOHCO{sup 3} has been investigated in batch experiments in near-neutral and basic solutions as a function of dissolution time in 0.1 M NaClO{sup 4} at room temperature under oxic conditions. After the solutions reach… more
Date: December 1, 1987
Creator: Nitsche, H.
Partner: UNT Libraries Government Documents Department
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Fission Cross Section Calculations of Actinides With EMPIRE Code

Description: The cross sections of the neutron induced reactions on {sup 233,234,236}U, {sup 237}Np, {sup 238,242}Pu, {sup 241,243}Am, {sup 242,246}Cm carried out in the energy range 1 keV-20 MeV with EMPIRE code are presented, emphasizing the fission channel. Beside a consistent, accurate set of evaluations, the paper contains arguments supporting the choice of the reaction models and input parameters. A special attention is paid to the fission parameters and their uncertainties.
Date: April 30, 2010
Creator: Sin, M.; Oblozinsky, P.; Herman,M. & Capote,R.
Partner: UNT Libraries Government Documents Department
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Transuranium Processing Plant semiannual report of production, status, and plans for period ending December 31, 1976

Description: During the period July 1, 1976, through December 31, 1976, transuranium elements were obtained from 11 irradiated HFIR targets; products recovered are 0.3 g /sup 243/Am, 16.6 g /sup 244/Cm, 23 g /sup 249/Bk, 211 g /sup 252/Cf, 1.15 mg /sup 253/Es, and 0.4 pg /sup 247/Fm. Two batches of high-purity /sup 248/Cm were purified chemically for shipment, and another batch containing about 62 mg of /sup 248/Cm was separated from /sup 252/Cf. Thirty shipments were made from TRU during the period; recipi… more
Date: October 1, 1977
Creator: King, L. J.; Bigelow, J. E. & Collins, E. D.
Partner: UNT Libraries Government Documents Department
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Transuranium processing plant semiannual report of production, status, and plans for period ending June 30, 1976

Description: During the period January 1, 1976, through June 30, 1976, the following amounts of transuranium elements were recovered from ten irradiated HFIR targets: 2 g /sup 243/Am, 50 g /sup 244/Cm, 29 mg /sup 249/Bk, 277 mg /sup 252/Cf, 1.7 mg /sup 253/Es, and 0.5 pg /sup 257/Fm. About 50 mg of high-purity /sup 248/Cm was purified chemically for shipment, and another 75 mg of /sup 248/Cm was separated from /sup 252/Cf. Nineteen HFIR targets, each containing approximately 9 g of curium, were fabricated. … more
Date: February 1, 1977
Creator: King, L. J.; Bigelow, J. E. & Collins, E. D.
Partner: UNT Libraries Government Documents Department
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324 Building Baseline Radiological Characterization

Description: This report documents the analysis of radiological data collected as part of the characterization study performed in 1998. The study was performed to create a baseline of the radiological conditions in the 324 Building.
Date: June 24, 2010
Creator: R.J. Reeder, J.C. Cooper
Partner: UNT Libraries Government Documents Department
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Transuranium Processing Plant semiannual report of production, status, and plans for period ending June 30, 1975

Description: During the period January 1, 1975, through June 30, 1975, the following amounts of transuranium elements were recovered from 22 irradiated HFIR targets: 2g /sup 243/Am, 59 g /sup 244/Cm, 51 mg /sup 249/Bk, 465 mg /sup 252/Cf, 2.5 mg /sup 253/Es, and 1.4 pg /sup 257/Fm. In addition, 45 mg of high-purity /sup 248/Cm was operated from /sup 252/Cf which had been recovered and purified during earlier periods, and 56 mg of a lower-quality /sup 248/Cm was separated from californium purification rework… more
Date: March 1, 1976
Creator: King, L. J.; Bigelow, J. E. & Collins, E. D.
Partner: UNT Libraries Government Documents Department
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Report on 241,242Am(n,x) surrogate cross section measurement

Description: The main goal of this measurement is to determine the {sup 242}Am(n,f) and {sup 241}Am(n,f) cross sections via the surrogate {sup 243}Am. Gamma-ray data was also collected for the purpose of measuring the (n,2n) cross-sections. The experiment was conducted using the STARS/LIBERACE experimental facility located at the 88 Inch Cyclotron at Lawrence Berkeley National Laboratory the first week of February 2011. A description of the experiment and status of the data analysis follow.
Date: February 16, 2011
Creator: Burke, J. T.; Ressler, J. J.; Gostic, J.; Henderson, R. A.; Bernstein, L. A.; Escher, J. E. et al.
Partner: UNT Libraries Government Documents Department
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Measurements of delayed neutron emission from Np-237, Am-241, and Am-243

Description: Isotopes of transuranic elements are produced as a result of successive radiative capture reactions in the fuel of a nuclear reactor. Typically, these transuranic isotopes decay through long chains, have long half lives and dominate the long term toxicity of the spent reactor fuel. One of the options for waste management is to remove the transuranic from spent fuel by chemical processing, to load them into new special fuel elements, and to transmute them by neutron induced fission into shorter-… more
Date: December 1995
Creator: Saleh, H. H.; Parish, T. A. & Raman, S.
Partner: UNT Libraries Government Documents Department
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Alpha-Gamma Angular Correlation Measurements With Liquid Sources

Description: Alpha-gamma angular correlation measurements were made with solid sources of Am/sup 243/ and with liquid sources containing either Am/sup 243/ or an even-even alpha emitter in dilute perchloric acid solutions. Even-even alpha emitters studied are U/sup 232/, Th/sup 230/, and Ra/sup 226/ . Thicknesses of the soli d sources were controlled so that the neptunium recoils from one source were stopped in Am/sub 2/O/sub 3/, while recoils from the other sources were stopped in the aluminum, gold, or mi… more
Date: February 1, 1963
Creator: Murphy, E.S. Jr.
Partner: UNT Libraries Government Documents Department
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