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in subjects: "Thorium"

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Aerial radiometric and magnetic survey, San Angelo National Topographic Map: Texas, West Texas Project. Final report

The results of analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the San Angelo National Topographic Map NH14-1 are presented. The airborne data gathered are reduced by ground computer facilities to yield profile plots of the basic uranium, thorium, and potassium equivalent gamma radiation intensities, ratios of these intensities, aircraft altitude above the earth's surface, total gamma ray and earth's magnetic field intensity, correlate… more

Date: May 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Price 1/sup 0/ x 2/sup 0/ NTMS area, Utah. Data report (abbreviated)

Surface sediment samples were collected at 1444 sites, at a target sampling density of one site per 13 square kilometers. Ground water samples were collected at 137 sites. Neutron activation analysis results are given for uranium and 16 other elements in sediments, and for uranium and 9 other elements in ground water. Mass spectrometry results are given for helium in ground water. Field measurements and observations are reported for each site. Analytical data and field measurements are presente… more

Date: July 1, 1980

Creator: Cook, J. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Stream sediment detailed geochemical survey for Marysvale, Utah

Results of the Marysvale detailed geochemical survey are reported. Field and laboratory data are presented for 397 stream sediment samples and 160 radiometric readings. Statistical and areal distributions of uranium and possible uranium-related variables are displayed. A generalized geologic map of the area is provided, and pertinent geologic factors which may be of significance in evaluating the potential for uranium mineralization are briefly discussed. Stream sediments containing significant… more

Date: July 31, 1980

Creator: Butz, T. R.; Vreeland, J. L.; Bard, C. S.; Helgerson, R. N.; Grimes, J. G. & Pritz, P. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Investigations of the Natural Fission Reactor Program. Progress report, October 1976--September 1977

During Fiscal Year 1977, efforts of the Natural Fission Reactor Program have been directed toward (1) further measurements and predictions of reactor product migration at Oklo, (2) uraninite solubility studies, (3) radiogenic equilibria studies of natural Pu, Ra, and Th in U ores, (4) search for evidence of other natural fission reactors, and (5) supportive analytical measurements and procedures development.

Date: November 1, 1977

Creator: Apt, K.E. (ed.)

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Wells 1/sup 0/ x 2/sup 0/ NTMS area, Nevada. Data report (abbreviated)

Surface sediment samples were collected at 1336 sites, at a target sampling density of one site per 13 square kilometers. Ground water samples were collected at 112 sites. Neutron activation analysis results are given for uranium and 16 other elements in sediments, and for uranium and 9 other elements in ground water and surface water. Mass spectrometry results are given for helium in ground water. Field measurements and observations are reported for each site. Data from ground water and surfac… more

Date: July 1, 1980

Creator: Cook, J. R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Calculated and experimental studies of nonequilibrium solvent extraction of uranium-thorium and uranium-zirconium

The nonequilibrium simultaneous transfer of ions in solvent extraction has been examined experimentally and these results have been compared with the calculated behavior determined using transfer rate constants. In the Th-U system when transferring from 2 M HNO/sub 3/ into 30% tributyl phosphate (TBP) in normal hydrocarbon diluent (NPH), the thorium approaches equilibrium faster than uranium over much of the transfer region. Thus, nonequilibrium operation will not increase the separation factor… more

Date: January 1, 1980

Creator: Mailen, J. C. & Horner, D. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Consolidated fuel-reprocessing program. Progress report, April 1-June 30, 1982

Highlights of progress accomplished during the quarter ending June 30, 1982 are summarized. Discussion is presented under the headings: Process development; Laboratory R and D; Engineering research; Engineering systems; Integrated equipment test facility operation; Instrument development; and HTGR fuel reprocessing.

Date: September 1, 1982

Creator: Burch, W D

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Elko 1/sup 0/ x 2/sup 0/ NTMS area: Nevada and Utah. Data report

Results of ground water and surface sediment reconnaissance in the National Topographic Map Series (NTMS) Elko 1/sup 0/ x 2/sup 0/ quadrangle are presented. The target sampling density was one site per 12 square kilometers. This resulted in 1713 sediment samples being collected; however, dry conditions and sparce population contributed to the relatively small number of ground water (154) samples collected. Neutron activation analysis (NAA) results are given for uranium and 16 other elements in … more

Date: July 1, 1980

Creator: Fay, W.M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Auger study of surface carbon and oxygen on thorium following ion bombardment

The composition of a thorium metal surface has been monitored using Auger electron spectroscopy following Ar/sup +/ bombardment at different temperatures. After extended Ar/sup +/ bombardment, enough contaminated overlayers were removed to expose a surface region containing only thorium, bulk impurities, and imbedded argon. The main impurities, carbon and oxygen, differed in their behavior when the sample was annealed following bombardment. The amount of surface carbon either increased or remai… more

Date: November 17, 1977

Creator: Bastasz, R. & Colmenares, C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Spectrophotometric determination of uranium(IV) with Arsenazo III

A spectrophotometric procedure was developed for determining U(IV) in the presence of U(VI) by forming a colored complex with Arsenazo III in 4M HCl. The results compare satisfactorily with U(IV) determinations by ceric titration. Total uranium can be determined after reduction of U(VI) with metallic zinc. The concentration range for the absorbance cell solution is 0 to 2 ..mu..g U(IV)/mL. Other tetravalent ions, such as thorium, zirconium, hafnium, plutonium, and neptunium, will interfere.

Date: July 1, 1980

Creator: Baumann, E. W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Data report: Illinois, Indiana, Kentucky, Tennessee, and Ohio. National Uranium Resource Evaluation Program. Hydrogeochemical and stream sediment reconnaissance

This report presents the results of ground water, stream water, and stream sediment reconnaissance in Illinois, Indiana, Kentucky, Tennessee, and Ohio. The following sample types were collected in each state: Illinois - 716 stream sediment, 1046 ground water, 337 stream water; Indiana - 126 stream sediment, 443 ground water, 111 stream water; Kentucky - 4901 stream sediment, 6408 ground water, 3966 stream water; Tennessee - 3309 stream sediment, 3574 ground water, 1584 stream water; Ohio - 1214… more

Date: February 1, 1982

Creator: Sargent, K. A.; Cook, J. R. & Fay, W. M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Uranium hydrogeochemical and stream sediment reconnaissance data release for the Elk City NTMS Quadrangle, Idaho/Montana, including concentrations of forty-five additional elements

Totals of 1580 water and 1720 sediment samples were collected from 1754 locations in the quadrangle. Elemental concentration, field measurement, weather, geologic, and geographic data for each sample location are listed for waters in Appendix I-A and for sediments in Appendix I-B. Uranium/thorium ratios for sediment samples are also included in Appendix I-B. All elemental analyses were performed at the LASL. Water samples were initially analyzed for uranium by fluorometry. All water samples con… more

Date: July 1, 1980

Creator: Broxton, D. E. & Beyth, M.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Klamath falls 1/sup 0/ x 2/sup 0/ NTMS area: Oregon. Data report

Surface sediment samples were collected at 1413 sites, at a target sampling density of one site per 13 square kilometers. Ground water samples were collected at 150 sites. Neutron activation analysis results are given for uranium and 16 other elements in sediments, and for uranium and 9 other elements in ground water. Mass spectrometry results are given for helium in ground water. Field measurements and observations are reported for each site. Analytical data and field measurements are presente… more

Date: August 1, 1980

Creator: Koller, G.R.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Chemical Engineering Division Fuel Cycle Programs. Quarterly progress report, January-March 1979

In the program on pyrochemical and dry processing methods (PDPM) for nuclear fuel, corrosion testing of refractory metals and alloys, graphite, and SiC in PDPM environments was done. A tungsten-metallized Al/sub 2/O/sub 3/-3% Y/sub 2/O/sub 3/ crucible was successfully fabricated. Tungsten microstructure of a plasma-sprayed tungsten crucible was stabilized by nickel infiltration and heat treatment. Solubility measurements of Th in Cd and Cd-Mg alloys were continued, as were experiments to study … more

Date: January 1, 1980

Creator: Steindler, M J; Ader, M & Barletta, R E

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Preliminary analysis of alternative fuel cycles for proliferation evaluation

The ERDA Division of Nuclear Research and Applications proposed 67 nuclear fuel cycles for assessment as to their nonproliferation potential. The object of the assessment was to determine which fuel cycles pose inherently low risk for nuclear weapon proliferation while retaining the major benefits of nuclear energy. This report is a preliminary analysis of these fuel cycles to develop the fuel-recycle data that will complement reactor data, environmental data, and political considerations, whic… more

Date: January 1, 1977

Creator: Steindler, M. J.; Ripfel, H. C.F. & Rainey, R. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Uranium production in thorium/denatured uranium fueled PWRs

Uranium-232 buildup in a thorium/denatured uranium fueled pressurized water reactor, PWR(Th), was studied using a modified version of the spectrum-dependent zero dimensional depletion code, LEOPARD. The generic Combustion Engineering System 80 reactor design was selected as the reactor model for the calculations. Reactors fueled with either enriched natural uranium and self-generated recycled uranium or uranium from a thorium breeder and self-generated recycled uranium were considered. For enri… more

Date: October 18, 1977

Creator: Arthur, W.B.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Exploration geochemistry: The Los Alamos experience

Los Alamos National Laboratory became actively involved in geochemical exploration in 1975 by conducting a reconnaissance-scale exploration program for uranium as part of the National Uranium Resource Evaluation program. Initially, only uranium and thorium were analyzed. By 1979 Los Alamos was analyzing a multielement suite. The data were presented in histograms and as black and white concentration plots for uranium and thorium only. Data for the remaining elements were presented as hard copy d… more

Date: January 1, 1989

Creator: Maassen, L. W. & Bolivar, S. L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Determination of thorium and uranium at the nanogram per gram level in semiconductor potting plastics by neutron activation analysis

A method was developed to determine thorium and uranium in semiconductor potting plastics. The method is based on neutron activation and subsequent radiochemical separation to isolate and permit measurement of the induced /sup 233/Pa and /sup 239/Np. These plastics typically contain macro amounts of silicon, bromine and antimony and nanogram per gram amounts of thorium and uranium. The radiochemical method provides the necessary sensitivity and makes it possible to easily attain adequate decont… more

Date: January 1, 1985

Creator: Dyer, F.F.; Emery, J.F. & Bate, L.C.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Influence of safeguards and fire protection on criticality safety

There are several positive influences of safeguards and fire protection on criticality safety. Experts in each discipline must be aware of regulations and requirements of the others and work together to ensure a fault-tree design. EG and G Idaho, Inc., routinely uses an Occupancy-Use Readiness Manual to consider all aspects of criticality safety, fire protection, and safeguards. The use of the analytical tree is described.

Date: January 1, 1980

Creator: Six, D E

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Aerial radiometric and magnetic survey: San Antonio National Topographic Map, Texas. Final report

The results of analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the San Antonio National Topographic Map NH14-8 are presented. The airborne data gathered are reduced by ground computer facilities to yield profile plots of the basic uranium, thorium, and potassium equivalent gamma radiation intensities, ratios of these intensities, aircraft altitude above the earth's surface, total gamma ray and earth's magnetic field intensity, correlat… more

Date: May 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Application of the active well coincidence counter to the measurement of uranium

An Active Well Coincidence Counter has been developed to assay uranium fuel material in field inspection applications. The unit is used to measure bulk UO/sub 2/ samples, high enrichment uranium metals, LWR fuel pellets, and /sup 233/U-Th fuel materials which have very high gamma-ray backgrounds.

Date: January 1, 1980

Creator: Menlove, H. O.; Foley, J. E. & Bosler, G. E.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Uranium hydrogeochemical and stream sediment reconnasissance of the Trinidad NTMS Quadrangle, Colorado, including concentrations of forty-two additional elements

Uranium and other elemental data resulting from the Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) of the Trinidad National Topographic Map Series (NTMS) quadrangle, Colorado, by the Los Alamos Scientific Laboratory (LASL) are reported herein. This study was conducted as part of the United States Department of Energy's National Uranium Resource Evaluation (NURE), which is designed to provide improved estimates of the availability and economics of nuclear fuel resources and to make a… more

Date: May 1, 1980

Creator: Shannon, S.S. Jr.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Ion scattering studies of some actinide materials. [E < 650 eV]

Surfaces of polycrystalline U, Th, and single crystalline UO/sub 2/(111) were examined with He/sup +/, Ne/sup +/, and Ar/sup +/ at incident beam energies E/sub i/ less than or equal to 650 eV. A double-pass cylindrical mirror analyzer was used in a custom vacuum system intended primarily for UPS. The approach was to determine if the instrument could serve in a complementary ISS capacity and, if so, what the ion scattering conditions are for detecting surface oxygen and the actinides. Data are p… more

Date: January 1, 1977

Creator: Ellis, W. P. & Taylor, T. N.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Dual mechanism bifunctional polymers for the complexation of lanthanides and actinides. [Phosphinic resins]

Phosphinic acid ion exchange/redox resins are synthesized by the reaction between polystyrene beads and phosphorus trichloride followed by base hydrolysis. The reaction requires a temperature of 73/sup 0/C for full functionalization to occur. The effect of lower functionalization temperatures on resin acid capacity was determined and the concomitant effect on ion exchange investigated. The acid capacity was found to vary from 1.09 mequiv/g to 4.79 mequiv/g in the functionalization temperature r… more

Date: January 1, 1985

Creator: Alexandratos, S.D.; Quillen, D.R. & McDowell, W.J.

Item Type: Article

Partner: UNT Libraries Government Documents Department