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An Analytical Study of the Feasibility of Irradiating U233/Th232 Metal Fuel Experiments in EBR-II

Description: Recent concerns about the proliferation and diversion of plutonium have lead to reconsideration of Uranium-233/Thorium-232 fuel cycles. Although thorium fuels have been studied earlier, much of that work is incomplete; consequently, additional irradiation studies will be necessary.
Date: 1979?
Creator: Foltman, A. J. & Meneghetti, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Migration of Uranium Process Wastes from the Uranium-233--Thorium-232 Cycle

Description: With the advent of fuel loadings of uranium-233 in the Shippingport Reactor, it has become important to understand the migratory behavior of uranium. The purpose of this study is the determination of the parameters influencing the migration of uranium(VI), the most likely chemical form of uranium to be mobilized from a repository. Samples of rhyolite tuff were used to measure the absorption coefficients of solutions of uranium (VI) in ground waters. In addition, columns of tuff were used to mea… more
Date: 1979?
Creator: Fried, Sherman; Sabau, Carmen; Hines, John & Friedman, Arnold
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary Study, Isotopic Safeguards Techniques (IST), LMFBR Fuel Cycles

Description: This memorandum presents the preliminary results of the effort to investigate the applicability of isotope correlation techniques (ICT), formulated for the LWR system, to the LMFBR fuel cycle. The detailed isotopic compositional changes with burnup developed for the CRBR was utilized as the reference case. This differs from the usual LMFBR design studies in that the core uranium is natural uranium rather than depleted. Nevertheless, the general isotopic behavior should not differ significantly … more
Date: June 1980
Creator: Persiani, P. J. & Kroc, T. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Final Report for the Light Water Breeder Reactor Proof-of-Breeding Analytical Support Project

Description: The technology of breeding uranium-233 from thorium-232 in a light water reactor is being developed and evaluated by the Westinghouse Bettis Atomic Power Laboratory (BAPL) through operation and examination of the Shippingport Light Water Breeder Reactor (LWBR). Bettis is determining the end-of-life (EOL) inventory of fissile uranium in the LWBR core by nondestructive assay of a statistical sample comprising approximately 500 EOL fuel rods. This determination is being made with an irradiated-fue… more
Date: May 1987
Creator: Graczyk, D. G.; Hoh, J. C.; Martino, F. J.; Nelson, R. E.; Osudar, John & Levitz, Norman M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Leakage Neutron Spectrum of U²³³ Critical Assembly

Description: Abstract: "The leakage neutron spectrum of a U²³³ spherical critical assembly (Jezebel) has been measured using nuclear emulsions as radiator and detector. The spectrum obtained is compared with similar measurements on the U-235 and Pu-239 analogues of Jezebel U²³³; it is found to agree closely with that of the Pu-239 assembly and to be harder than that of the U-235 assembly. All three spectra are compared with theoretical spectra obtained from a numerical approximation to the neutron transport… more
Date: September 1962
Creator: Bobisud, Larry E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Safety Tests on Hand Stacking of U-235 Cubes

Description: From abstract: "Critical assembly tests have been made on the Pajarito Universal Machine to determine the safety limits of handstacking cubes of 95% U-235 in spherical geometries preparatory to making critical assemblies of U-235 in an "infinite" tuballoy tamper. The U-235 cubes were stacked as pseudospheres in a cavity at the top of a tuballoy block 12" high and 8" on a side, and the assembly tamped by locating it inside a doughnut shaped water tank whose tamping effect is equivalent to the ta… more
Date: October 11, 1948
Creator: Josephson, V.; Young, D. S. & Dike, R. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Critical Mass Measurements on Graphite U²³⁵ Systems

Description: Abstract: "Measurements have been made on pseudo-cylindrical graphite-enriched uranium unreflected systems. These measurements include both critical mass determinations and time dependent measurements using a pulsed neutron source to drive the assemblies."
Date: April 11, 1957
Creator: Carothers, James Edward
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Proceedings of the NEANDC/NEACRP Specialists Meeting on Fast Neutron Fission Cross Sections of U-233, U-235, U-238, and Pu-239, June 28-30, 1976, at Argonne National Laboratory

Description: Compilation of papers presented during the meeting of NEANDC/NEACRP specialists to discuss fast neutron fission cross sections of U-233, U-235, U-238, and Pu-239.
Date: 1976?
Creator: Poenitz, W. P. & Smith, A. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Isotopic Anomalies in High Z Elements : Uranium?

Description: Uranium in terrestrial volcanic ejecta from mantle-related sources has been analyzed mass spectrometrically. The objective was to seek supporting evidence for or refutation isotopic variations reported by Fried et al. (1985) for some such samples. The possibility that terrestrial U is not of constant isotopic composition is extraordinary. If true, mechanisms for creating the variation must be sought and the lack of homogenization within the earth addressed. Samples of 100 grams or more were pro… more
Date: March 1989
Creator: Jovanovic, S.; Reed, G. W., Jr.; Essling, A. M.; Rauh, E. G. & Graczyk, D. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Study of the Delayed Neutron Emitter, Br87

Description: Report discussing a study to determine experimentally whether a low neutron binding energy must be assigned to Kr⁸⁷ to explain the neutron emission or whether the beta-decay energy is especially high, as well as to determine the fission yield of Br⁸⁷.
Date: August 1, 1950
Creator: Stehney, Andrew Frank
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The U²²⁷ Collateral Series

Description: The following report describes data from the continuation of investigations which led to the observation and characterization of five artificial radioactive chains collateral to the natural radioactive families that has lead to the partial identification of one additional chain, collateral to the actinium family.
Date: February 21, 1951
Creator: Meinke, W. Wayne; Ghiorso, Albert & Seaborg, Glenn T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Relative Cross Sections for Photo Fission and Photo Neutron Emission

Description: Abstract: The yields of U²³⁷ and a fission product were measured as a function of maximum betatron energy, The ratio of the number of fissions divided by the number of U²³⁷ atoms increases with increasing maximum betatron energy. This is consistent with the picture that the higher-energy gammas leave the U²³⁷ atoms with enough excitation energy (above photofission and photoneutron thresholds) to also decay by fission or neutron emission. This secondary process increases the number of fissions a… more
Date: May 20, 1952
Creator: Duffield, Robert B. & Huizenga, John R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiations of 6.7d U²³⁷

Description: Abstract: The radiations of U²³⁷ have been studied using a magnetic lens beta ray spectrometer and scintillation spectrometers for betas and gammas singly and in coincidence. A beta with an end point energy of 245 keV was found along with evidence for the existence of lower energy components. Gammas of energy 27, 42, 49, 59, 166, 208, 269, 354, 431, and 467 keV were found, and probably a gamma of 102 keV. The decay scheme constructed gives a total decay energy for this isotope of 512 keV.
Date: May 14, 1952
Creator: Wagner, F., Jr.; Freedman, M. S.; Engelkemeir, D. W. & Huizenga, John R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An Influence Function for the Beta Activity of Uranium(235) Fission Products

Description: Abstract: "Computations have been made of the total beta activity of the fission products arising from the slow neutron fission of U-235. A curve is given exhibiting the activity the activity per unit fission, for time intervals after fission ranging from 0.01 second to 10 years. This influence function is compared with some published experimental data and with the statistical curve of Way and Wigner. A curve facilitates estimation of the activity in the particular case where the fission rate h… more
Date: September 1, 1950
Creator: Thornton, J. Kendall & Houghton, William J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary Data on the Phase Equilibrium Systems UO₂ - MgO ; U³O⁸ - MgO ; UO₂ - Nd²O³ ; U³O⁸ - Nd²O³ ; and UO₂ - Al²O³

Description: The following report describes data on the provided phase equilibrium systems that show the general nature of the diagrams and the compounds and solid solutions which occur.
Date: April 8, 1952
Creator: Lambertson, Wingate A. & Mueller, Melvin H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Independent and Relative Yields of I¹³¹, I¹³², I¹³³, I¹³⁴, and I¹³⁵ Formed in Fission of U²³⁵ by 14-Mev and Thermal Neutrons

Description: Abstract: "The following results were derived from experiments in which iodine was quickly separated from irradiated uranium metal at a known time after irradiation. The fractional chain yields are based on the cumulative chain yields at iodine."
Date: 1954
Creator: Wahl, Arthur C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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6.70 EV Resonance in U²³⁸

Description: "Using the Brookhaven fast chopper, transmission curves were obtained for the 6.70 +/- .06 ev resonance in U238 using four different thicknesses of natural uranium metal." The measurements for the transmission curves are summarized in the table provided.
Date: November 9, 1953
Creator: Levin, Jules S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Velocities of Fragments from Fission of U²³³, U²³⁵ and Pu²³⁹

Description: The following report analyzes the velocity distribution of fragments from slow neutron induced fission that have been measured by a time-of-flight method. Data is compared with data from fission fragments stopped in ionization chambers filled with argon and carbon dioxide, and these velocity data indicate that the kinetic energies of the fragments exceed those reported by ionization chamber measurements.
Date: 1952
Creator: Leachman, R. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Self-Shielding Measurements in PPA-20

Description: From Introduction: "The self-shielding characteristics of a number of absorbers and of U-235 and U-238 have been investigated in PPA-20 (66°). Most of the measurements have been made in Ring 3 at the core mid-plane. The foil doubling technique was employed. Particular attention was given to 'thin' foil regions for the purpose of extrapolating the data to zero thickness."
Date: September 9, 1954
Creator: King, J. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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