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in subjects: "Gadolinium Compounds"

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Heat-Flux Gage thermophosphor system

This document describes the installation, hardware requirements, and application of the Heat-Flux Gage (Version 1.0) software package developed by the Oak Ridge National Laboratory, Applied Technology Division. The developed software is a single component of a thermographic phosphor-based temperature and heat-flux measurement system. The heat-flux transducer was developed by EG G Energy Measurements Systems and consists of a 1- by 1-in. polymethylpentene sheet coated on the front and back with … more

Date: August 1, 1991

Creator: Tobin, K.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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A toxicological study of gadolinium nitrate

The sensitization study in the guinea pig did not show gadolinium nitrate to have potential sensitizing properties. Skin application studies in the rabbit demonstrated that it was cutaneously a severe irritant. This material was considered an irritant in the rabbit eye application studies. 3 refs., 1 tab.

Date: May 1, 1988

Creator: London, J.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Preparation of oxide superconductors

Preparation of bulk superconductors by cold pressing and sintering of metal oxides has been optimized in this study. A knowledge of phase behavior was used in developing a flux method for growing superconducting single crystals of yttrium and gadolinium based superconductors. Means of achieving single-phase, high-density samples of (Rare Earth)-Ba/sub 2/Cu/sub 3/O/sub 7/ with optimal electronic properties are reviewed. 2 refs., 2 figs.

Date: January 1, 1988

Creator: Peterson, D.E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Radiation damage studies related to nuclear waste forms

Much of the previously reported work on alpha radiation effects on crystalline phases of importance to nuclear waste forms has been derived from radiation effects studies of composite waste forms. In the present work, two single-phase crystalline materials, Gd/sub 2/Ti/sub 2/O/sub 7/ (pyrochlore) and CaZrTi/sub 2/O/sub 7/ (zirconolite), of relative importance to current waste forms were studied independently by doping with /sup 244/Cm at the 3 wt % level. Changes in the crystalline structure me… more

Date: December 1, 1981

Creator: Gray, W.J.; Wald, J.W. & Turcotte, R.P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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A 2-D imaging heat-flux gauge

This report describes a new leadless two-dimensional imaging optical heat-flux gauge. The gauge is made by depositing arrays of thermorgraphic-phosphor (TP) spots onto the faces of a polymethylpentene is insulator. In the first section of the report, we describe several gauge configurations and their prototype realizations. A satisfactory configuration is an array of right triangles on each face that overlay to form squares when the gauge is viewed normal to the surface. The next section of the… more

Date: July 1, 1991

Creator: Noel, B.W.; Borella, H.M. (Los Alamos National Lab., NM (United States)); Beshears, D.L.; Sartory, W.K.; Tobin, K.W.; Williams, R.K. (Oak Ridge National Lab., TN (United States)) et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Thermoelectric materials evaluation program. Quarterly technical task report No. 46. [Minnesota Mining and Manufacturing Company, Technical Ceramic Products Div. , St. Paul, 10/1 to 12/31/1975]

This forty-sixth Technical Task Report prepared under contract E(11-1)-2331 with the U.S. AEC and U.S. ERDA covers the performance period from October 1, 1975, to December 31, 1975. Highlights include the following tasks: N-type material development (material synthesis--gadolinium selenide compositions; material analyses; material processing; element contacting; ingradient compatibility and life testing; mechanical property characterization), TPM-217 P-type characterization (material preparatio… more

Date: February 1976

Creator: Hampl, E. F., Jr.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Corrosion of 304L and 316 in gadolinium nitrate neutron poison solutions

Pitting corrosion has occurred on AISI Type 304L stainless steel (304L) conductivity probes used to monitor liquid levels of gadolinium nitrate neutron poison solutions (GPS). An electrochemical and immersion test program has led to a better understanding of the cause of corrosion of 304L probes. Results indicate that the alternating voltage applied to the probes to monitor contact with solution is the primary factor in the corrosion of the probes. A chloride-containing dye and low pH also cont… more

Date: January 1, 1991

Creator: Chandler, G. T. & Anderson, M. H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Thermoelectric Materials Evaluation Program. Annual technical report for fiscal year 1979

Optimization was initiated with respect to performance, operating temperatures, and thermoelectric properties of an N-type material based on rare earth (neodymium and gadolinium) selenide technology. Effort was expanded to experimentally describe the chemical, electrical and physical behavior of P-type thermoelectric material over a range of temperatures. Emphasis was changed in P-type material research from basic properties to sublimation suppression by wrapping, and to the understanding of co… more

Date: October 1979

Creator: Hinderman, J.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Fuel performance annual report for 1983. Volume 1

This annual report, the sixth in a series, provides a brief description of fuel performance during 1983 in commercial nuclear power plants. Brief summaries of fuel design changes, fuel surveillance programs, fuel operating experience, fuel problems, high-burnup fuel experience, and items of general significance are provided. References to additional, more detailed information and related NRC evaluations are included.

Date: March 1, 1985

Creator: Bailey, W.J. & Dunenfeld, M.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Program of thermoelectric generator testing and RTG degradation mechanisms evaluation. Progress report No. 38

The n-type gadolinium selenide legs after 17,500 hours continue to show reasonable agreement with the 3M Co. published thermal conductivity data. Weight loss for both coated and uncoated Si-Ge material produced by G.E. are reported. No significant discrepancies with the results previously obtained on R.C.A. material from the MHW program have been found. Thermal conductivity measurements are also in agreement. The remaining MHW generator on test, Q1-A, has accumulated 26,800 hours and performanc… more

Date: November 1, 1980

Creator: Lockwood, A. & Shields, V.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Magnetic interactions in ternary superconductors

Numerous ternary superconductors containing rare-earth atoms have recently been studied in order to investigate the magnetic interactions between the conduction electrons and local magnetic moments. These investigations range from the evaluation of the strength of spin-flip scattering of the conduction electrons off the rare-earth moments to the problem of the coexistence of superconductivity and magnetic order. Results are presented of studies on (Eu,Sn)Mo/sub 6/S/sub 8/, ErRh/sub 4/B/sub 4/, … more

Date: January 1, 1978

Creator: Shenoy, G. K.; Dunlap, B. D.; Fradin, F. Y.; Kimball, C. W.; Potzel, W.; Proebst, F. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Absorption spectrophotometric and x-ray diffraction studies of NdI/sub 3/, NdOI, and SmI/sub 3/

Results are described of the examination of anhydrous tri-iodides of neodymium and samarium and the oxy-iodide of neodymium, by x-ray powder diffraction and spectrophotometry. Lattice parameters are given LaI/sub 3/, PrI/sub 3/, NdI/sub 3/, SmI/sub 3/, GdI/sub 3/, TbI/sub 3/, and NdOI. (FS)

Date: January 1, 1979

Creator: Haire, R. G.; Young, J. P. & Bourges, J. Y.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Crystal Field Interaction and Magnetic Order in GdBa/sub 2/Cu/sub 3/O/sub 7/

We report experimental data on the crystal field interaction of Gd ions with their environment in Gd/sub x/Eu/1-x/Ba/sub 2/Cu/sub 3/O/sub 7/. The ESR spectrum and a Schotiky anomaly in the specific heat of dilute samples indicate the existence of a crystal field splitting of the /sup 8/S/sub 7/2/ ground state of the Gd/sup 3 +/ ions of about 1.5K. Since the single ion energies involved are of the same order of magnitude as the energies associated with the magnetic ordering of the Gd moments in … more

Date: January 1, 1988

Creator: Causa, M. T.; Fainstein, C.; Nieva, G.; Sanchez, R.; Steren, L. B.; Tovar, M. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Fabrication of selenide segmented elements

Processes are described for the fabrication of P- and N-type elements with high-efficiency selenide segments. Bonded hot and cold caps were attached to these elements with techniques based on processes developed in successful TRANSIT and Ring converter programs. An iron barrier was introduced in the segmented P-type element between the (Cu,Ag)/sub 2/Se and (Bi,Sb)/sub 2/Te/sub 3/ layers. This was made necessary by the known degradation in thermoelectric properties of (Bi,Sb)/sub 2/Te/sub 3/ con… more

Date: March 1, 1980

Creator: Elsner, N.B.; Chin, J. & Reynolds, G.H.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Paraconductivity measurements and comparative studies of fluctuations in BiSrCaCuO, YBaCuO and YBaCuO with Gd substitution

Information concerning the dimensionality of the superconductive fluctuations in the new high temperature superconductors can be derived from the excess conductivity (or paraconductivity) near the transition temperature. Here the lowering'' of the sample resistance in the same temperature regions is used for extraction of dimensionality and generally for comparative studies of the critical behaviour of three different samples such as YBa{sub 2}Cu{sub 3}O{sub 7}, Y{sub 0.8}Gd{sub 0.2}Ba{sub 2}Cu… more

Date: January 1, 1991

Creator: Patapis, S. K.; Sideridis, L.; Apostolopoulos, G.; Ausloos, M.; Luo, H. L.; Politis, C. (Kernforschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Nukleare Festkoerperphysik) et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Flux pinning and flux creep in neutron irradiated (Y,Gd)Ba sub 2 Cu sub 3 O sub x

Powder samples of Y{sub 0.9}Gd{sub 0.1}Ba{sub 2}Cu{sub 3}O{sub x} were irradiated with mixed spectrum ({approximately}50% E<0.5eV, 50% E>0.5eV) neutrons with most interactions expected to occur at the Gd site. As a function of fluence the samples showed increased ({approximately}X3-X8) magnetically measured critical current densities J{sub c} at low fluences, falling off at the highest values. An analysis of magnetic relaxation data, which allows for a nonlinear pinning potential U vs J relatio… more

Date: January 1, 1991

Creator: Willis, J.O. (Los Alamos Scientific Lab., NM (United States) Superconductivity Research Lab., Tokyo (Japan)); Sickafus, K.E. & Peterson, D.E. (Los Alamos National Lab., NM (United States))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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SIG technology and converter-hardware schedule status as applicable to Galileo flight program. [Selenide Isotope Generator]

A detailed description of the status of the design, fabrication, and testing of the Selenide Isotope Generator for the Galileo program is presented. (WHK)

Date: December 29, 1978

Creator: Hinderman, J.D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Correlation of waterside corrosion and cladding microstructure in high-burnup fuel and gadolinia rods

Waterside corrosion of the Zircaloy cladding has been examined in high-burnup fuel rods from several BWRs and PWRs, as well as in 3 wt % gadolinia burnable poison rods obtained from a BWR. The corrosion behavior of the high-burnup rods was then correlated with results from a microstructural characterization of the cladding by optical, scanning-electron, and transmission-electron microscopy (OM, SEM, and TEM). OM and SEM examination of the BWR fuel cladding showed both uniform and nodular oxide … more

Date: September 1, 1989

Creator: Chung, H.M. (Argonne National Lab., IL (USA))

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Physical characteristics of GE (General Electric) BWR (boiling-water reactor) fuel assemblies

The physical characteristics of fuel assemblies manufactured by the General Electric Company for boiling-water reactors are classified and described. The classification into assembly types is based on the GE reactor product line, the Characteristics Data Base (CDB) assembly class, and the GE fuel design. Thirty production assembly types are identified. Detailed physical data are presented for each assembly type in an appendix. Descriptions of special (nonstandard) fuels are also reported. 52 re… more

Date: June 1, 1989

Creator: Moore, R.S. & Notz, K.J.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Thermoelectric generator testing and RTG degradation mechanisms evaluation. Progress report No. 35

The n-type selenide legs after 14,000 hours continue to show reasonable agreement with the 3M Co. published data. In the ingradient testing after 14,700 hours the n-legs show serious degradation in power to load. Weight loss measurements on the first samples of material produced by G.E. match the results previously obtained on R.C.A. material from the MHW program. The remaining MHW generator on test Q1-A has accumulated 22,519 hours and performance remains stable. The 18 couple modules S/N-1 an… more

Date: May 1, 1980

Creator: Lockwood, A. & Shields, V.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Ordered structures in YBa/sub 2/Cu/sub 3/O/sub 7-y/, La/sub 2-x/Sr/sub x/CuO/sub 4-par. delta/ and related perovskites

Electron microscopy and electron diffraction studies have been performed on the superconducting oxides YBa/sub 2/Cu/sub 3/O/sub 7-y/, GdBa/sub 2/Cu/sub 3/O/sub 7-y/ and La/sub 2-x/Sr/sub x/CuO/sub 4-par. delta/ as well as the related perovskites La/sub 2/CuO/sub 4/, Eu/sub 2/CuO/sub 4/ and Gd/sub 2/CuO/sub 4/. Extra reflections are commonly observed in all the cases. For example, in the 123 compounds, in situ heating leads to transformations from orthorhombic to tetragonal with a loss of twin s… more

Date: January 1, 1988

Creator: Mitchell, T.E.; Roy, T.; Fisk, Z. & Smith, J.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Progress report No. 31 for a program of thermoelectric generator testing and RTG degradation mechanisms evaluation

Thermal conductivity measurements of the p-type and n-type selenide alloys after 19,800 hours and 6,500 hours, respectively, continue to show good agreement with the 3M Co. published data. Ingradient testing of n-legs after 8900 hours show comparable performance to the reported 3M data. Ingradient testing of p-legs at accelerated test conditions has completed 5432 hours and performance shows reasonable correlation with accelerated temperature and current gradients. This test has been discontinu… more

Date: July 1, 1979

Creator: Stapfer, G. & Garvey, L.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Gadolinium as an Element for Neutron Capture Therapy

At BNL, preparations are being made to test in vitro compounds containing Gd and compare their response to the response of GD-DTPA to determine if one or several compounds can be located that enter the cells and enhance the Auger effect. Two similar rotators with positions for cell vials that have been constructed for these tests. The first rotator is made of only paraffin which simulates healthy tissue and provides control curves. The second rotator has 135 ppM of Gd-157 in the paraffin to sim… more

Date: January 1, 1992

Creator: Brugger, Robert M.; Liu, Hungyuan B.; Laster, Brenda H.; Gordon, Christopher R.; Greenberg, Dennis D. & Warkentien, Lynne S.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Chemical aspects of gadolinium nitrate as soluble nuclear poison in Savannah River Plant reactors

The aqueous solution chemistry of gadolinium nitrate was studied to identify conditions that interfere with successful cleanup of gadolinium in Savannah River Plant reactor systems. Injecting a gadolinium nitrate solution into the D/sub 2/O coolant-moderator constitutes a supplementary mode of reactor shutdown. The resulting approximately 0.001M gadolinium nitrate solution is then deionized by recirculation through mixed-bed ion exchange resins before reactor operation is resumed.

Date: January 1, 1978

Creator: Baumann, E. W.

Item Type: Article

Partner: UNT Libraries Government Documents Department