232 Matching Results

Search Results

Advanced search parameters have been applied.

in subjects: "Tritium Compounds"

open access

Tritium half-life

Least squares analyses of calorimetric measurements made at Mound Laboratory on two tritide compounds over a period of 18 y were performed to determine the half-life of tritium. A half-life of 12.3232 +- 0.0043 mean solar years was obtained.

Date: December 22, 1977

Creator: Rudy, C. R. & Jordan, K. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Tritium storage development. Progress report No. 12, April--June 1977. [In metal hydride; polymer impregnated tritiated concrete]

Laboratory work was continued on hydriding of zirconium sponge and rod under varying conditions of temperature (400 to 900/sup 0/C) and pressure (0-1000 torr) to determine optimum conditions for the formation of hydrides with desirable mechanical properties. Titanium sponge and rod were also hydrided for comparison. Zirconium and titanium samples containing tritium were prepared and initial leach data were obtained. Leach rates for zirconium in distilled water ranged from 1.1 x 10/sup -6/ to 4.… more

Date: January 1, 1976

Creator: Colombo, P

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Humic substance formation during wastewater infiltration

Soil infiltration of wastewater effluents is a widely practiced method of treatment and disposal/reuse throughout the world. Renovation of the wastewater results from a wide variety of complex physicochemical and biological processes. One set of processes is speculated to involve the accumulation of organic matter by filtration and sorption followed by formation of humic substances. This humic substance formation can effect the performance of soil treatment systems by contributing to soil pore … more

Date: January 1, 1991

Creator: Siegrist, R.L. (Oak Ridge National Lab., TN (United States)); Hildmann-Smed, R.; Filip, Z.K. (Bundesgesundheitsamt (BGA), Langen (Germany). Inst. fuer Wasser-, Boden- und Lufthygiene) & Jenssen, P.D. (Norges Landbrukshoegskole, Aas (Norway). Centre for Soil and Environmental Research)

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

TRITOX: a multiple parameter evaluation of tritium toxicity

The increased use of nuclear reactors for power generation will lead to the introduction of tritium into the environment. The need for assessing possible immediate and long-term effects of exposure to this tritium led to the development of a broad program directed towards evaluating the possible somatic and genetic effects of continuous exposure to tritiated water (HTO). Among the parameters measured are the genetic, cytogenetic, reproductive efficiency, growth, nonspecific lifetime shortening,… more

Date: January 1, 1982

Creator: Carsten, A.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fuel temperature determination for ICF microspheres

The common heuristic expression for estimating thermonuclear burn in ICF microspheres far from bootstrap heating is often used for inversion to obtain peak temperatures from experimental data. It contains an ad hoc or fitted parameter and lacks some parameters of obvious influence in actual systems. We present an alternative expression, which may be usefully inverted and does not suffer these defects.

Date: August 1, 1980

Creator: Henderson, D.B. & Giovanielli, D.V.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Environmental studies group. Annual report for 1978

Group projects included radioecological studies of aquatic and terrestrial systems, land management activities, foodstuff monitoring, dust transport studies including fugitive dust measurements and modeling, and several support programs involving evaluation of the plant's ambient air samplers and airborne tritium monitoring techniques. Some salient results from the several project reports include determination of an appropriate model for mechanically generated fugitive dust dispersion, a r… more

Date: August 21, 1980

Creator: Hunt, D. C. & Hurley, J. D.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Quadrupole mass-filter sensitivities of H/sub 2/, HD, D/sub 2/, and T/sub 2/, and the kinetics of. beta. -particle induced exchange between H/sub 2/, D/sub 2/, and T/sub 2/ at 25. 4/sup 0/C

We have constructed a quadrupole-mass filter system to measure the equilibrium constants and rates of reaction of the ..beta..-particle-induced exchanges between H/sub 2/, D/sub 2/, and T/sub 2/ at cryogenic temperatures. Even with careful calibration experiments at 25.4/sup 0/C, we could not completely remove the mass discrimination inherent in our method. We estimate the accuracy of our mixture analyses to be +-2.2% in the D/sub 2/-DT-T/sub 2/ system, and +-9% in the H/sub 2/-HT-T/sub 2/ syst… more

Date: January 11, 1978

Creator: Pyper, J. W.; Kelly, E. M.; Magistad, J. G.; Tsugawa, R. T.; Roberts, P. E. & Souers, P. C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Placental transport of radionuclides. Terminal report, May 1, 1973--July 31, 1975. [Tritiated water, tritium, /sup 14/C, /sup 45/C, and /sup 47/C tracers]

Four successful experiments were conducted with tritiated water on pregnant sheep. This came into equilibrium between fetal and maternal circulations within 60 seconds after injection into the ewe or the fetus. The estimates of total water transport rate averaged 85% of the daily water intake. Six successful experiments were conducted with /sup 3/H- and /sup 14/C-glucose on pregnant ewes. The results for glucose space and transport rate in the ewes agree closely with previously published data. … more

Date: August 1, 1977

Creator: Kronfeld, D.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Synthesis of high specific activity (1- sup 3 H) farnesyl pyrophosphate

The synthesis of tritiated farnesyl pyrophosphate with high specific activity is reported. trans-trans Farnesol was oxidized to the corresponding aldehyde followed by reduction with lithium aluminium tritide (5%-{sup 3}H) to give trans-trans (1-{sup 3}H)farnesol. The specific radioactivity of the alcohol was determined from its triphenylsilane derivative, prepared under very mild conditions. The tritiated alcohol was phosphorylated by initial conversion to an allylic halide, and subsequent trea… more

Date: August 1, 1991

Creator: Saljoughian, M.; Morimoto, H. & Williams, P. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Assessment of microbial processes on gas production at radioactive low-level waste disposal sites

Factors controlling gaseous emanations from low level radioactive waste disposal sites are assessed. Importance of gaseous fluxes of methane, carbon dioxide, and possible hydrogen from the site, stems from the inclusion of tritium and/or carbon-14 into the elemental composition of these compounds. In that the primary source of these gases is the biodegradation of organic components of the waste material, primary emphasis of the study involved an examination of the biochemical pathways producing… more

Date: May 1, 1982

Creator: Weiss, A.J.; Tate, R.L. III & Colombo, P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Migration of radionuclides following shallow land burial

A study of radionuclide migration was conducted at a facility used from 1944 to 1949 for the shallow land burial of radwaste produced during operations with two reactors and related nuclear research. It is situated in glacial drift 45 m thick. Underlying the drift is a generally level Silurian dolomite bedrock 60 m thick. The thickness of the drift decreases as the surface slopes downhill (north) until the dolomite reaches the surface and forms the bed of a river, 700 m to the north. This study… more

Date: January 1, 1980

Creator: Sedlet, J. & Golchert, N.W.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Biomedical applications of digital autoradiography with a MWPC

A Multiwire Proportional Chamber (MWPC) was used as a ..beta../sup -/ radioactivity detector in biological and medical applications. Two different kinds of experiments were performed: the study of variations in the ability of cell clones to incorporate a radioactive precursor of DNA biosynthesis (/sup 3/H-thymidine) and the regional carbohydrate consumption in myocardial tissue by means of a deposit tracer of glucose metabolism (/sup 3/H-deoxyglucose).

Date: May 1, 1982

Creator: Bellazzini, R.; Betti, G.; Del Guerra, A.; Massai, M. M.; Ragadini, M.; Spandre, G. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Conceptual design of an emergency tritium clean-up system

The Los Alamos Scientific Laboratory (LASL) has been selected to design, build, and operate a facility to demonstrate the operability of the tritium-related subsystems that would be required to successfully develop fusion reactor systems. Basically, these subsystems would consist of the deuterium-tritium fuel cycle and associated environmental control systems. An emergency tritium clean-up subsystem (ETC) for this facility will be designed to remove tritium from the cell atmosphere if an accide… more

Date: January 1, 1978

Creator: Muller, M.E.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Enhanced oil recovery by improved waterflooding. Fourth annual report, October 1980-September 1981. [Illinois]

Energy Resourcs Co. Inc., and its subcontractor Elf Aquitaine Oil and Gas Company are conducting a 100-acre pilot polymer flood in the Storms Pool Field near Carmi, in White County, Illinois. The project is a cost-sharing venture with the United States Department of Energy (DOE). Preparation for the polymer flood began in September 1977, and the project is scheduled for completion in December 1983. This report reviews progress during the fourth year of performance (October 1980 through Septembe… more

Date: May 1, 1982

Creator: Craig, F.F. III; Passman, F.J. & Burtch, F.W.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Safety Analysis Report for Packaging (SARP): USA/9507/BLF (ERDA--AL), Model AL-M1. [Configurations 1, 3, and 5]

The SARP includes structural integrity, thermal resistance, radiation shielding and radiological safety, nuclear criticality safety, and quality control of three insulated drum shipping containers identified as USA/9507/BLF (ERDA-AL), also called AL-M1, configurations 1, 3, and 5. Complete physical and technical descriptions of the packages are presented. Each package consists of an inner container centered within an insulated steel drum. The contents are plutonium-239 and uranium-235 in config… more

Date: September 30, 1977

Creator: Watkins, R. A.; Bertram, R. E.; Blauvelt, R. K.; Edling, D. A.; Flanagan, T. M.; Griffin, J. F. et al.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Tritium conversion and its influence on personnel protection at a fusion reactor

Tritium gas is less hazardous than tritiated water. The difference appears to be on the order of 10/sup 4/ rather than the previously used figure of 10/sup 2/. With an additional factor of 10/sup 2/ for protective clothing, a potential difference of 10/sup 6/ in the relative HTO to HT hazard results. The mechanisms for conversion of HT to HTO are not fully known but models presented strongly link the presence of H and OH radicals with the ultimate formation of water. Therefore a hindrance of th… more

Date: January 1, 1980

Creator: Easterly, C E & Phillips, J E

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Pinellas Plant environmental monitoring report, 1981

The effluent and environmental monitoring programs maintained by the Pinellas Plant are designed to determine the efficiencies of treatment and control mechanisms, to provide measurements of discharge concentrations for comparison with applicable standards, and to assess the concentrations of these discharges in the environment. Small quantities of tritium gas, tritium oxide, carbon-14 labeled solvent and krypton-85 gas were released from the plant during the year. Average maximum ground level … more

Date: March 1, 1982

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Low-exposure tritium radiotoxicity in mammals

Studies of tritium radiotoxicity involving chronic /sup 3/H0H exposures in mammals demonstrate in both mice and monkeys that biological effects can be measured following remarkably low levels of exposure - levels in the range of serious practical interest to radiation protection. These studies demonstrate also that deleterious effects of /sup 3/H beta radiation do not differ significantly from those of gamma radiation at high exposures. In contrast, however, at low exposures tritium is signific… more

Date: February 11, 1982

Creator: Dobson, R.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Status of water disposal well (Fawn Creek Government No. 1), Project Rio Blanco, June 20, 1974

Disposal of tritiated water in a gas well is reported. The gas production, water disposal, and sampling history of the well are briefly reviewed. Blowdown testing of the well is reported. (LEW)

Date: January 1, 1974

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Commercial scale demonstration: enhanced oil recovery by micellar-polymer flood. Annual report, October 1980-September 1981

This commercial scale test, known as the M-1 Project, is located in Crawford County, Illinois. It encompasses 407 acres of Robinson sand reservoir and covers portions of several waterflood projects that were approaching economic limit. The project includes 248 acres developed on a 2.5-acre five-spot pattern and 159 acres developed on a 5.0-acre five-spot pattern. Development work commenced in late 1974 and has previously been reported. Micellar solution (slug) injection was initiated on Februar… more

Date: May 1, 1982

Creator: Howell, J.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Photochemistry of psoralen-DNA adducts, biological effects of psoralen-DNA adducts, applications of psoralen-DNA photochemistry

This thesis consists of three main parts and totally eight chapters. In Part I, The author will present studies on the photochemistry of psoralen-DNA adducts, specifically, the wavelength dependencies for the photoreversals of thymidine-HMT (4'-hydroxymethyl-4, 5', 8-trimenthylpsoralen) monoadducts and diadduct and the same adducts incorporated in DNA helices and the wavelength dependecies for the photocrossslinking of thymidine-HMT monoadducts in double-stranded helices. In Part II, The author… more

Date: March 1, 1988

Creator: Shi, Yun-bo

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Design of the Target Fabrication Tritium Laboratory

The design of the Target Fabrication Tritium Laboratory for deuterium-tritium fuel processing for laser fusion targets has been accomplished with the intent of providing redundant safeguard systems. The design of the tritium laboratory is based on a combination of tritium handling techniques that are currently used by experienced laboratories. A description of the laboratory in terms of its interrelated processing systems is presented to provide an understanding of the design features for safe … more

Date: May 5, 1982

Creator: Sherohman, J. W.; Roberts, D. H. & Levine, B. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Calculations for estimating the equilibrium washout of tritium

The equilibrium washout of tritiated water vapor (HTO) and tritium gas (HT) downwind from an instantaneous point source can be estimated by simple formulas. Derivations for three different models (Fickian Puff, Leaky Puff, and Leaky Garbage Can) are given for estimating the washout/m/sup 2/ from a puff. Two models are given (Leaky Garbage Can and Fickian Puff) for calculating the fraction of pollution remaining in a puff after it has traveled over an arbitrary distance. The relationship between… more

Date: January 1, 1978

Creator: Long, P.E. Jr.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Specificity of interaction between carcinogenic polynuclear aromatic hydrocarbons and nuclear proteins: widespread occurrence of a restricted pattern of histone-binding in intact cells

Metabolic activation of benzo(a)pyrene (B(a)P) produces a number of potentially reactive metabolites. The endproducts of one metabolic pathway, 7,8-dihydroxy-9,10-oxy-7,8,9,10-tetrahydro-B(a)P (BPDE) are responsible for essentially all DNA adduct formation in animal cells treated with B(a)P, and a particular stereoisomer, designated (+)-anti-BPDE is thought to be the ultimate carcinogenic derivative of B(a)P. In hamster embryo cell nuclei treated with (+)-anti-BPDE, two of the histones of the n… more

Date: January 1, 1982

Creator: MacLeod, M. C.; Pelling, J. C.; Slaga, T. J.; Nikbakht-Noghrei, P. A.; Mansfield, B. K. & Selkirk, J. K.

Item Type: Article

Partner: UNT Libraries Government Documents Department