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Evaluation of models for assessing compliance with environmental radiation regulations

Description: The use of environmental transport and dosimetry models to predict the consequences of radionuclide releases from nuclear facilities is discussed. It is pointed out that many input parameters, and hence the predictions, of these models have a high degree of variability. The determination of the uncertainties of the predictions of these models is essential for assessing the adequacy of their use to ensure compliance with radiation protection standards. Estimation of the depletion of an airborne … more
Date: January 1, 1977
Creator: Hoffman, F. O.; Shaeffer, D. L.; Miller, C. W. & Garten C. T. Jr.
Partner: UNT Libraries Government Documents Department
open access

Radionuclide content of an exhumed canyon tank and neighboring soil

Description: To assess the long-term hazard potential associated with the burial of partially decontaminated process equipment, burial emplacements of equipment from an irradiated-fuel separations building (canyon) are being exhumed and examined. One piece of equipment, a Purex feed adjustment tank that was retired in 1957 from service in a hot canyon at the Savannah River Plant, has been exhumed and studied. This paper describes sampling of neighboring soil, tank exhumation, results of assay of soil and ta… more
Date: January 1, 1977
Creator: Holcomb, H. P.
Partner: UNT Libraries Government Documents Department
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Locating giant resonances with photoneutrons

Description: Recent studies of collective magnetic dipole resonances in heavy nuclei are reviewed with an emphasis on photoneutron experiments. In particular, the nuclear mass regions of 120, 140, and 208 are discussed in detail. New very-high-resolution photoneutron studies of /sup 208/Pb are presented. Applications of the photoneutron polarization method to the /sup 208/Pb(..gamma..,n/sub 0/)/sup 207/Pb and /sup 119/Sn(..gamma..,n/sub 0/)/sup 118/Sn reactions are reviewed. 12 figures, 2 tables)
Date: January 1, 1978
Creator: Holt, R.J.
Partner: UNT Libraries Government Documents Department
open access

Use of fluorescent screens for isotope radiography

Description: Radiographic examination can be performed on items beyond the limitation of conventional isotope radiography without a great loss of resolution. With proper film and screen selection and scatter radiation control, fluorescent screens can be a valuable additional tool for radiography.
Date: January 1, 1979
Creator: Hubbard, S. K.
Partner: UNT Libraries Government Documents Department
open access

Hanford waste encapsulation: strontium and cesium. [SrF/sub 2/ encapsulated in Hastelloy C-276 and CsCl in stainless steel 316L]

Description: The strontium and cesium fractions separated from high radiation level wastes at Hanford are converted to the solid strontium fluoride and cesium chloride salts, doubly encapsulated, and stored underwater in the Waste Encapsulation and Storage Facility (WESF). A capsule contains approximately 70,000 Ci of /sup 137/Cs or 70,000 to 140,000 Ci of /sup 90/Sr. Materials for fabrication of process equipment and capsules must withstand a combination of corrosive chemicals, high radiation dosages and f… more
Date: June 1, 1976
Creator: Jackson, R. R.
Partner: UNT Libraries Government Documents Department
open access

Light water reactor fuel reprocessing: dissolution studies of voloxidized fuel

Description: Voloxidation is a proposed head-end process to remove tritium from irradiated LWR fuel by roasting the fuel in the presence of oxygen. The process oxidizes UO/sub 2/ to a fine U/sub 3/O/sub 8/ powder with high surface area for dissolution. Small-scale tests with irradiated Robinson, Oconee, and Saxton reactor fuels have been made to determine the dissolution behavior of both voloxidized and nonvoloxidized (UO/sub 2/) fuel. No significant technical problems were encountered in batch-dissolving o… more
Date: January 1, 1977
Creator: Johnson, D. R. & Stone, J. A.
Partner: UNT Libraries Government Documents Department
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Tellurium interference in /sup 129/I activation analysis

Description: Measurement of /sup 129/I at low levels is required for effluent control, environmental assessment and tracer studies in the natural environment. Low level /sup 129/I analysis has also been used for measurement of natural-fission-produced /sup 129/I in minerals and ores as well as meteorites. The most sensitive method for /sup 129/I measurements is neutron activation analysis of iodine separated from a suitable sample. Minimum sample processing prior to neutron activation is desirable in order … more
Date: September 20, 1979
Creator: Kaye, J. H.; Brauer, F. P. & Strebin, Jr., R. S.
Partner: UNT Libraries Government Documents Department
open access

Environmentally important radionuclides in nonproliferative fuel cycles. [/sup 3/H, /sup 14/C, /sup 99/Tc, and /sup 232/U]

Description: Our analyses indicate that more in-depth research should be done on /sup 3/H, /sup 14/C, /sup 99/Tc, and /sup 232/U, especially because of their presence in nonproliferative fuel cycles. For increased /sup 3/H production by fast reactors, we can only speculate that such research could show that environmental releases might be significantly greater than for LWRs. Carbon-14 will likely not be a problem if a suitable decontamination factor can be agreed upon for reprocessing facilities and if a sa… more
Date: January 1, 1978
Creator: Kaye, S. V. & Till, J. E.
Partner: UNT Libraries Government Documents Department
open access

Capture of 2 and 24 keV neutrons by the zirconium isotopes. [Cascade energies, J,. pi. ]

Description: The Zr isotopes were studied with the capture of 2- and 24-keV neutrons from the Brookhaven High Flux Reactor tailored beam facility. The binding energies of /sup 91/, /sup 92/ /sup 94/Zr were measured. The intensities of the primary ..gamma..-ray intensities for /sup 91/ /sup 92/ /sup 94/Zr are given and compared with previous experimental evidence. 9 references.
Date: January 1, 1978
Creator: Kenny, M J; Stelts, M L & Chrien, R E
Partner: UNT Libraries Government Documents Department
open access

Moessbauer studies of ternary superconductors

Description: Moessbauer studies of the ternary Chevrel phase and rare earth rhodium boride superconductors have been made. Anomalous phonon properties at the Sn site in SnMo/sub 6/S/sub 8/, SnMo/sub 6/Se/sub 8/, and La/sub 0/ /sub 98/Sn/sub 0/ /sub 02/Mo/sub 6/Se/sub 8/ have been investigated. Studies of polarization of conduction electrons at the site of the magnetic ion have been made by means of the /sup 151/Eu Moessbauer effect in Eu/sub x/Sn/sub 1-x/Mo/sub 6/S/sub 8/ and the effects of such polarizatio… more
Date: January 1, 1978
Creator: Kimball, C. W.; Van Landuyt, G. L.; Barnet, C. D.; Shenoy, G. K.; Dunlap, B. D. & Fradin, F. Y.
Partner: UNT Libraries Government Documents Department
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The (n,p) reaction at 60 MeV on ND-2 targets. [M1 Strength, Angular Distribution, Transitions, Giant Resonance, Cross Sections]

Description: Various results are presented on energy levels of the isobaric analog resonances produced in the (n,p) reaction on /sup 7/Li, /sup 9/Be, /sup 27/Al, /sup 58/ /sup 60/ /sup 62/ /sup 64/Ni, /sup 90/Zr, and /sup 209/Bi targets. The emphasis is on qualitative features of the data through a comparison with existing results from other nuclear probes as well as observed properties of the isovector transitions anticipated from known isospin selection rules. 21 references. (JFP)
Date: January 1, 1979
Creator: King, N. S. P. & Ullmann, J. L.
Partner: UNT Libraries Government Documents Department
open access

Telluro amino acids-synthesis, characterization and properties of a new and potentially useful class of compounds. [Chemical preparation of /sup 123 mm/Te-labeled amino acids for use in nuclear medicine]

Description: The Te-123m nuclide emits 159 keV photons suggesting that agents labeled with this nuclide would be attractive candidates for tissue imaging. Amino acids labeled with Te-123m are of particular interest since some of these compounds would be isosteric with the sulfur analogs and might behave similarly in vivo. Such agents could possibly be useful for pancreatic imaging and for other biomedical applications. The goal of this investigation was to develop a general chemical method for the preparati… more
Date: January 1, 1978
Creator: Knapp, Furn F., Jr.; Ambrose, K. R. & Callahan, A. P.
Partner: UNT Libraries Government Documents Department
open access

Tellurium-123m-labeled isosteres of palmitoleic and oleic acids show high myocardial uptake

Description: These studies were directed at determining if the telluro fatty acids prepared by the isosteric replacement of the ..delta../sup 9/-double bonds of oleic and palmitoleic acids with /sup 123m/Te would show heart uptake in rats. The isostere of palmitoleic acid, 9-tellurapentadecanoic acid(II), was prepared by basic hydrolysis of the product formed by the coupling of /sup 123m/Te-sodium hexyl tellurol with methyl-8-bromooctadecanoate. Similarly, the isostere of oleic acid, 9-telluraheptadecanoic … more
Date: 1979~
Creator: Knapp, Furn F., Jr.; Ambrose, Kathleen R.; Callahan, Alvin P.; Grigsby, Robert A. & Irgolic, Kurt J.
Partner: UNT Libraries Government Documents Department
open access

Strategy analysis for krypton-85 waste management

Description: Krypton-85 is a chemically inert, radioactive gas produced by fission of uranium or plutonium isotopes. Depending on the fuel cycle, krypton-85 production in nuclear reactors may range from approx. 200 to approx. 600 kCi/GW/sub e/-year. However, the EPA has published a standard restricting krypton-85 release to 50 kCi/GW/sub e/-year for fuel irradiated after January 1, 1983. To conform with the federal standard, recovery and storage of krypton-85 will be required in some nuclear fuel cycle proc… more
Date: January 1, 1979
Creator: Knecht, D.A. & Brown, R.A.
Partner: UNT Libraries Government Documents Department
open access

Iodine-129 dose to the world population from the nuclear power industry

Description: Because of the 15.7 million-year half life for /sup 129/I and the mobility of iodine in the environment, releases of /sup 129/I result in potential radiological impacts on the entire world population essentially in perpetuity. This paper presents estimates of dose to the world population from releases of /sup 129/I by the world nuclear power industry during the years 1975 to 2020.
Date: January 1, 1979
Creator: Kocher, D. C. & Till, J. E.
Partner: UNT Libraries Government Documents Department
open access

Microscopic-macroscopic features in fusion reactions involving light systems

Description: Experimental results obtained at Argonne and elsewhere for the fusion cross-section energy dependence for light to medium weight systems are presented. The most notable features in these data are the observation of (1) oscillatory structure in the fusion cross section excitation function for those systems involving the most tightly bound nuclei in the 1p shell and (2) sudden increases in the maximum fusion cross section for systems which involved nuclei differing only by one or two nucleons. Co… more
Date: January 1, 1977
Creator: Kovar, D G
Partner: UNT Libraries Government Documents Department
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BLIP production of Fe-52 and the Mn-52m generator

Description: Fe-52 (t 1/2 = 8.275 h) is the only radioisotope of iron with decay properties suitable for imaging applications (100% 169-keV and 112% annihilation gammas). It can also be used in a Fe-52/Mn-52m generator system as a source of Mn-52m (t 1/2 = 21.1m) which is a short-lived positron emitter (192.54% annihilation gammas). Clinically useful quantities of Fe-52 have been prepared at the Brookhaven Linac Isotope Producer (BLIP) by bombarding manganese or nickel targets with medium-energy protons. Af… more
Date: January 1, 1979
Creator: Ku, Thomas H.; Richards, Powell; Stang, Louis G. & Prach, Thomas
Partner: UNT Libraries Government Documents Department
open access

Indocyanine green labeled with /sup 123/I for dynamic studies of the hepato-biliary system. [/sup 131/I, /sup 125/I]

Description: This report summarizes the results to develop an iodine-123 labeled agent for dynamic studies of the hepato-biliary system. Iodine-123 is an ideal nuclide for radiopharmaceuticals, because of its short half-life (T/sub /sup 1///sub 2// = 13.3 hr); its decay with a high abundance (83%) of 159 keV photons; and the reduced patient radiation exposure (a factor of 100 less than iodine-131). Indocyanine green, a tricarbanocyanine dye, was introduced by Heseltine and co-workers in 1956, has several ch… more
Date: January 1, 1975
Creator: Lambrecht, R. M.; Ansari, A. N.; Wolf, A. P. & Atkins, H. L.
Partner: UNT Libraries Government Documents Department
open access

Positron-emitting raionuclides: present and future status

Description: A tabulation of 157 positron-emitting radionuclides that have the physical characteristics deemed appropriate for radiopharmaceutical use in conjunction with positron emission tomography is provided. The most promising radionuclides are within the production capabilities of a variable-energy cyclotron accelerating protons to about 40 MeV and deuterons, helium-3, and helium-4 to compatable energies. To data only 27 positron-emitting radionuclides have been subjected to radiopharmaceutical consid… more
Date: January 1, 1979
Creator: Lambrecht, R.M.
Partner: UNT Libraries Government Documents Department
open access

X-ray monitoring of 230-kV cable potheads for maintenance inspections

Description: A system has been designed by which pothead connections and corresponding components can be radiographically inspected for high mechanical stresses and failure potential. The system, employing a /sup 60/Co source with a special lead collimator, was used to make high-resolution radiographs of 230 kV potheads of cables in the high-pressure oil-filled pipe-type cable system at Grand Coulee Dam. The selection and use of the equipment are discussed. It was concluded from this operation that radiogra… more
Date: January 1, 1979
Creator: Lawrence, R. C.
Partner: UNT Libraries Government Documents Department
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CdTe Ambulatory Ventricular Function Monitor

Description: A prototype device consisting of two arrays of CdTe detectors, ECG amplifiers and gate, microprocessor, and tape recorder was devised to record simultaneous ECG and radionuclide blood pool data from the left ventricle for extended periods during normal activity. The device is intended to record information concerning both normal and abnormal physiology of the heart and to permit the evaluation of new pharmaceuticals under everyday conditions. Preliminary results indicate that the device is capa… more
Date: January 1, 1979
Creator: Lazewatsky, J. L.; Alpert, N. M.; Moore, R. H.; Boucher, C. A. & Strauss, H. W.
Partner: UNT Libraries Government Documents Department
open access

Kinetic model building using advanced nuclear medicine techniques: the kinetics of chromium(III) in the human body. [/sup 51/Cr]

Description: The purpose of this study is to investigate whether a valid index of chromium (III) nutritional status can be determined with satisfaction through in vivo kinetic analysis. Three normal subjects and three patients suffering from hemochromatosis were periodically scanned with the Donner Laboratory computerized whole body scanners, starting seconds after radiochromium(III) was administered intravenously, up to a period of 84 days. The activity in the liver, adipose and muscle tissues, spleen and … more
Date: June 1, 1978
Creator: Lim, T.H.
Partner: UNT Libraries Government Documents Department
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