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Radioactivity in food crops

Description: Published levels of radioactivity in food crops from 21 countries and 4 island chains of Oceania are listed. The tabulation includes more than 3000 examples of 100 different crops. Data are arranged alphabetically by food crop and geographical origin. The sampling date, nuclide measured, mean radioactivity, range of radioactivities, sample basis, number of samples analyzed, and bibliographic citation are given for each entry, when available. Analyses were reported most frequently for /sup 137/C… more
Date: May 1, 1983
Creator: Drury, J.S.; Baldauf, M.F.; Daniel, E.W.; Fore, C.S. & Uziel, M.S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Single-pass leaching of nuclear melt glass by groundwater, Part I

Description: Melt glass (fused rock containing fission and activation products and actinides) produced by three underground nuclear explosions has been leached at 25/sup 0/C with groundwater obtained from a well near the explosion sites. Leaching was carried out in cells with the groundwater passing over glass particles (size range: 40 to 030 ..mu..) at flow rates of 36 and 6.7 cm/day. With this dynamic flow-through system, the solid sample is continually exposed to fresh leaching solution in an attempt to … more
Date: August 1, 1978
Creator: Coles, D. G.; Weed, H. C.; Jackson, D. D. & Schweiger, J. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hanford Site ground-water monitoring for July through December 1987

Description: The Pacific Northwest Laboratory monitors ground-water quality at the Hanford Site for the US Department of Energy to assess the impact of Site operations on the environment. Work undertaken between July and December 1987 included monitoring ground-water elevations across the Site, monitoring hazardous chemicals and radionuclides in ground water, geochemical evaluations of unconfined ground-water data, and calibration of ground-water flow and transport models. Water levels continued to rise in … more
Date: December 1, 1988
Creator: Evans, J. C.; Dennison, D. I.; Bryce, R. W.; Mitchell, P. J.; Sherwood, D. R.; Krupka, K. M. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Leach rate characterization of solid radioactive waste forms

Description: Leach rates were measured using distilled water on four types of waste forms: spray calcined waste mixed with silica and borosilicate glass and sintered, the same pulverized, the same in a lead matrix, and waste glass containing U. Twenty isotopes ranging from /sup 22/Na to /sup 239/Np were measured using activation analysis. Leach rates were also measured for a variety of matrix materials (Zircaloy, Al, Pb, glass, Pb/sub 3/RE/sub 6/(SiO/sub 4/)/sub 6/), using one isotope each. 2 tables. (DLC)
Date: January 1, 1978
Creator: Flynn, K.F.; Barletta, R.E.; Jardine, L.J. & Steindler, M.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Waste/Rock Interactions Technology Program. Status report on LWR spent-fuel leach tests

Description: Spent fuels with burnups of 9000, 28,000 and 54,500 MWd/MTU have been leach tested at 25/sup 0/C. Three leach-test procedures (Paige, IAEA and static) were used. IAEA and static tests were conducted in five different solutions: deionized water, sodium bicarbonate, sodium chloride, calcium chloride and Waste Isolation Pilot Plant B brine solutions. Elemental leach data are reported based on the release of /sup 90/Sr/sup +90/Y, /sup 106/Ru, /sup 137/Cs, /sup 144/Ce, /sup 154/Eu, /sup 239 +240/Pu,… more
Date: November 1980
Creator: Katayama, Y. B.; Bradley, D. J. & Harvey, C. O.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thorium utilization program. Quarterly progress report for the period ending May 31, 1977

Description: Results of work performed under the National HTGR Fuel Recycle Program (also known as the Thorium Utilization Program) at General Atomic Company are presented. Results of work on this program prior to June 1974 were included in a quarterly series on the HTGR Base Program. The work reported includes the development of unit processes and equipment for reprocessing of High-Temperature Gas-Cooled Reactor (HTGR) fuel, the design and development of an integrated pilot line to demonstrate the head end… more
Date: June 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Closure of the Oak Ridge National Laboratory Hydrofracture Facility: An opportunity to study the fate of radioactive wastes disposed of by subsurface injection

Description: At Oak Ridge National Laboratory, subsurface injection has been used to dispose of liquid low-level nuclear waste for the past two decades. The process consists of mixing the liquid waste with cement and other additives to form a slurry that is injected under pressure through a cased well into a low-permeability shale at a depth of approximately 300 m (1000 ft). The slurry spreads from the well along hydraulic fractures and sets to form irregularly shaped grout sheets of up to 200 m (650 ft) in… more
Date: January 1, 1987
Creator: Haase, C. S.; Von Damm, K. L. & Stow, S. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Vectorially photoinduced electron-transfer processes across water-in-oil interfaces of microemulsions

Description: Artificial photosynthetic devices are potential fuel sources. The basic idea in the design of such devices is a photosensitized electron-transfer that yields chemical species capable of reducing and oxidizing water to hydrogen and oxygen. A fundamental difficulty in effecting this transfer is the thermodynamically favored back reactions of the intermediary redox species. An interfacial model composed of a water-in-oil microemulsion is suggested to provide the separation of these redox species, … more
Date: July 1, 1980
Creator: Willner, I.; Otvos, J. W. & Calvin, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Thermal effects of electrically conductive deposits in melter

Description: The radioactive waste processed by the Defense Waste Processing Facility melter at the Savannah river Site contains noble metal fission-products. Operation of waste-glass melters treating commercial power reactor wastes indicates that accumulation of noble metals on melter floors can lead to distortion of electric heating patterns, loss of power, and possible electrode damage. Changes in melter geometry have been developed in Japan and Germany to minimize these effects. The two existing melters… more
Date: January 1, 1992
Creator: Choi, I.G.; Bickford, D.F. & Carter, J.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radionuclide Migation Project 1984 progress report

Description: The report discusses the hydrogeologic settings and histories of studies associated with the Cheshire (U20n), Cambric (U5e), Nash (UE2ce), Bilby (U3cn), Bourbon (U7n), and Faultless (UC1) Events. Radionuclide and some chemical data are presented for water samples from cavity or chimney wells associated with the Cheshire, Cambric, and Bilby Events, and from satellite wells at the Cambric, Nash, Bibly, Bourbon, and Faultless Event sites. The report also gives the results of studies of specific sa… more
Date: April 1, 1985
Creator: Buddemeier, R.W. & Isherwood, D. (comps.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Separation of gas mixtures by supported complexes

Description: The goal of this program is to determine the feasibility of solvent-dissolved coordination complexes for the separation of gas mixtures under bench-scale conditions. In particular, mixtures such as low-Btu gas are examined for CO and H/sub 2/ separation. Two complexes, Pd/sub 2/(dpm)/sub 2/Br/sub 2/ and Ru(CO)/sub 2/(PPh/sub 3/)/sub 3/, were examined in a bench-scale apparatus for the separation of binary (CO-N/sub 2/ or H/sub 2/-N/sub 2/) and quinary (H/sub 2/, CO, CO/sub 2/, CH/sub 4/, and N/… more
Date: August 1, 1986
Creator: Nelson, D. A.; Lilga, M. A.; Hallen, R. T. & Lyke, S. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Intramolecular energy transfer reactions in polymetallic

Description: This report is concerned with intramolecular, energy-transfer reactions. The concept of preparing synthetically a complex molecular species, capable of absorbing a photon at one metal center (antenna fragment), transferring that energy to a second metal center (reactive fragment) via a bridging ligand was first reported by our group in 1979. It is now apparent that a major emphasis in inorganic chemistry in the future will involve these types of molecular ensembles. Complexes discussed include … more
Date: November 1, 1990
Creator: Petersen, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Transportation fuels from synthetic gas

Description: Twenty-five experimental Fischer-Tropsch synthesis runs were made with 14 different catalysts or combinations of catalysts using a Berty reactor system. Two catalysts showed increased selectivity to transportation fuels compared to typical Fischer-Tropsch catalysts. With a catalyst consisting of 5 wt % ruthenium impregnated on a Y zeolite (run number 24), 63 to 70 wt % of the hydrocarbon product was in the gasoline boiling range. Using a 0.5 wt % ruthenium on alumina catalyst (run number 22), 6… more
Date: August 1, 1981
Creator: Baker, E.G. & Cuello, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Defense by-products production and utilization program: noble metal recovery screening experiments

Description: Isotopes of the platinum metals (rutheium, rhodium, and palladium) are produced during uranium fuel fission in nuclear reactors. The strategic values of these noble metals warrant considering their recovery from spent fuel should the spent fuel be processed after reactor discharge. A program to evaluate methods for ruthenium, rhodium, and palladium recovery from spent fuel reprocessing liquids was conducted at Pacific Northwest Laboratory (PNL). The purpose of the work reported in this docuent … more
Date: March 1, 1986
Creator: Hazelton, R.F.; Jensen, G.A. & Raney, P.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Spent LWR fuel leach tests: Waste Isolation Safety Assessment program

Description: Spent light-water-reactor (LWR) fuels with burnups of 54.5, 28 and 9 MWd/kgU were leach-tested in deionized water at 25/sup 0/C. Fuel burnup has no apparent effect on the calculated leach rates based upon the behavior of /sup 137/Cs and /sup 239 +240/Pu. A leach test of 54.5 MWd/kgU spent fuel in synthetic sea brine showed that the cesium-based leach rate is lower in sea brine than in deionized water. A rise in the leach rate was observed after approximately 600 d of cumulative leaching. During… more
Date: April 1, 1979
Creator: Katayama, Y.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of methods for removing strontium, plutonium, and ruthenium from Savannah River Plant waste supernate

Description: As a part of long-term waste management studies at the Savannah River Laboratory, tests were made to study removal of strontium, plutonium, and ruthenium from simulated and actual waste supernates. Plutonium was sorbed by Duolite ARC-359 ion exchange resin, the same resin that is used to remove cesium from waste supernate. Strontium was removed from supernate by sorption on a chelating resin Chelex 100, or by precipitation as Sr/sub 3/(PO/sub 4/)/sub 2/. Activities of /sup 137/Cs, /sup 90/Sr, a… more
Date: June 1, 1976
Creator: Wiley, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Separation of gas mixtures by supported complexes. Final report, 1 October 1982-30 September 1984

Description: This final report covers research performed to identify and demonstrate advantageous procedures for the chemical separation of gases, such as CO, CO/sub 2/, and H/sub 2/, from medium-Btu gas mixtures by use of supported complexes. Three complexes were chosen for rapid gas uptake and selectivity at 25/sup 0/C from among a group of 22 coordination complexes synthesized during this program. The three complexes showed considerable selectivity toward individual gases. For instance, Pd/sub 2/(dpm)/su… more
Date: January 1, 1985
Creator: Nelson, D. A.; Hallen, R. T. & Lilga, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Long-term uncertainty in radiological performance assessments of low-level waste facilities at Savannah River Site

Description: Radiological performance assessments are being conducted for the Saltstone Disposal Facility and the E-Area Vaults at the Savannah River Site near Aiken, South Carolina. Saltstone is a solidified waste form which will contain very low levels of radionuclides but considerable levels of nitrate. The E-Area Vaults will contain solid, radioactively contaminated waste. Preliminary results of the assessments indicate that adequate performance will be very sensitive to the degradation scenario adopted… more
Date: January 1, 1991
Creator: McDowell-Boyer, L.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hanford Site ground-water monitoring for April through June 1987

Description: Pacific Northwest Laboratory (PNL) is conducting ground-water monitoring at the Hanford Site. Results for monitoring by PNL and Westinghouse Hanford Company (WHC) during April-June 1987 show that certain regulated hazardous materials and radionuclides exist in Hanford Site ground waters. The presence of regulated constituents in the ground water derives both from site operations and from natural sources. The major contamination problems defined by recent monitoring activities are carbon tetrach… more
Date: January 1, 1988
Creator: Evans, J.C.; Mitchell, P.J. & Dennison, D.I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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