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Office of Scientific & Technical Information Technical Reports
228
Congressional Research Service Reports
120
Texas Attorney General Opinions
62
Texas Patents
48
Technical Report Archive and Image Library
33
National Advisory Committee for Aeronautics Collection
23
Defense Base Closure and Realignment Commission
22
Government Accountability Office Reports
18
Texas Register
10
TRAIL Microcard Collection
10
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Recovery of Plutonium from Chloride Slag and Crucible
Neutron radiation can be greatly reduced by substituting plutonium trichloride for plutonium tetrafluoride in the dry chemistry step of metal preparation. Chloride processes are now common in the metal preparation industry, and the 234-5 Developmental Laboratory has shown plutonium trichloride can be satisfactorily prepared and reduced to the metal.
Date:
August 14, 1959
Creator:
Smith, R. C.
Object Type:
Report
System:
The UNT Digital Library
Criticality of Fuels of Low Enrichment in Cylinders
Maximum safe cylinder diameters, slab thicknesses, and minimum critical masses in spherical geometries for fuel of < 5.0& U-235 enrichment have been evaluated. It is of interest to know the minimum critical masses as a function of cylinder diameter for vessels that are not safe by geometry. Curves will be presented of critical masses as a function of cylinder diameter and fuel rod size for 1.6%, 3.0%, and 5.0% U-235 enriched metal-water systems.
Date:
August 14, 1959
Creator:
Ketzlach, N.
Object Type:
Report
System:
The UNT Digital Library
Equipment And Methods For Automatic Track Analysis
The writer has initiated a comprehensive program of equipment development designed to give the maximum practical aid to the physicists and technicians who are carrying out track measurements. Some attention has also been given to developing systems of data handling using International Business Machine (IBM) equipment and Keysort cards. In addition, some of the steps to insure the accuracy of the emulsion data are taken long before the emulsion is studied under the microscope.
Date:
August 14, 1958
Creator:
Barkas, Walter H. (Walter Henry), 1912-1969
Object Type:
Report
System:
The UNT Digital Library
Chemistry Division, Section C-II, Summary Report For October, November, and December 1952
This report deals with the (1.1) physical properties of graphite, (1.2) effects of pile irradiation on the properties of graphite, (1.3) effect of irradiation on "ceramic" materials, (1.4) exposure and dosage for radiation damage experiments, (1.5) apparatus for the measurement of the thermal conductivity of solids, (1.6) effects of radiation on ice -- the thermoluminescence of ice, (1.7) investigation of color centers and other optical properties of single crystals. (2.1) radiation chemistry of liquids, (3.1) radiochemical investigation of the spontaneous fission of Cm242, (3.2) radiochemical service, (3.3) on the one-body model of alpha, (4.1) spectrographic analysis, (4.2) chemical analysis, (5.1) the 60-inch cyclotron.
Date:
August 14, 1953
Creator:
Gilbreath, J. R. & Simpson, O. C.
Object Type:
Report
System:
The UNT Digital Library
Texas Register, Volume 45, Number 33, Pages 5559-5696, August 14, 2020
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
August 14, 2020
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Mass Spectrometric Observation of C14
This report describes observations of a sample of Carbon-14, or radiocarbon, made using the method of mass spectrometry.
Date:
August 14, 1946
Creator:
Ingrham, Mark G.
Object Type:
Report
System:
The UNT Digital Library
Organo-Phosphorous Compounds for Solvent Extraction
From summary: "The influence of the structure of phosphate esters on the distribution coefficient of uranium between solutions of these esters in carbon tetrachloride and aqueous nitrate solutions has been studied. Esters of secondary alcohols showed higher distribution coefficients than primary alcohols. Phenyl esters extracted less uranium than alkyl esters, and the presence of other negative groups also resulted in less extraction. Compounds containing carbon to phosphorus bonds gave higher distribution coefficients than the corresponding esters, and the distribution coefficients increased with the number of such carbon to phosphorus bonds. Tributyl phosphine oxide (with three carbon to phosphorus bonds) showed high distribution coefficients with many salts, including uranyl nitrate, uranyl sulfate, uranyl chloride, thorium nitrate, plutonium (IV) nitrate and some of the fission products in nitrate solution. It is planned to study these and similar compounds further."
Date:
August 14, 1952
Creator:
Higgins, C. E.; Baldwin, W. H. & Ruth, J. M.
Object Type:
Report
System:
The UNT Digital Library
Estimates of rates and errors for measurements of direct-. gamma. and direct-. gamma. + jet production by polarized protons at RHIC
Studies of inclusive direct-{gamma} production by pp interactions at RHIC energies were performed. Rates and the associated uncertainties on spin-spin observables for this process were computed for the planned PHENIX and STAR detectors at energies between {radical}s = 50 and 500 GeV. Also, rates were computed for direct-{gamma} + jet production for the STAR detector. The goal was to study the gluon spin distribution functions with such measurements. Recommendations concerning the electromagnetic calorimeter design and the need for an endcap calorimeter for STAR are made.
Date:
August 14, 1992
Creator:
Beddo, M. E.; Spinka, H. & Underwood, D. G.
Object Type:
Report
System:
The UNT Digital Library
Texas Turkey Poults: For Week Ending August 9, 1980
Weekly report of the Texas Crop and Livestock Reporting Service on turkey poult numbers in Texas and compared with other states. It includes compiled statistics across six consecutive weeks, from the week ending July 12 to the week ending August 9, during 1979 and 1980 for turkey eggs set and poults hatched.
Date:
August 14, 1980
Creator:
Texas Crop and Livestock Reporting Service
Object Type:
Report
System:
The Portal to Texas History
General Constraints on Cross Sections Deduced from Surrogate Reactions
Cross sections that cannot be measured in the laboratory, e.g. because the target lifetime is too short, can be inferred indirectly from a different reaction forming the same compound system, but with a more accessible beam/target combination (the ''surrogate-reaction'' technique). The reactions share the same compound system and a common decay mechanism, but they involve different formation processes. Therefore, an implicit constraint is imposed on the inferred cross section deduced from the measured surrogate-reaction data, through the common decay mechanism. In this paper, the mathematical consequences of this implicit constraint are investigated. General formulas are derived from upper and lower bounds on the inferred cross section, estimated from surrogate data in a procedure which does not require any modeling of the common decay process. As an example, the formulas developed here are applied to the case of the {sup 235}U(n,f) cross section, deduced from {sup 234}U(t,pf) surrogate data. The calculated bounds are not very tight in this particular case. However, by introducing a few qualitative assumptions about the physics of the fission process, meaningful bounds on the deduced cross section are obtained. Upper and lower limits for the cross-section ratio of the (n,f) reaction on the {sup 235}U isomer at …
Date:
August 14, 2003
Creator:
Younes, W.
Object Type:
Report
System:
The UNT Digital Library
Special session: computational predictability of natural convection flows in enclosures
Modern thermal design practices often rely on a ''predictive'' simulation capability--although predictability is rarely quantified and often difficult to confidently achieve in practice. The computational predictability of natural convection in enclosures is a significant issue for many industrial thermal design problems. One example of this is the design for mitigation of optical distortion due to buoyancy-driven flow in large-scale laser systems. In many instances the sensitivity of buoyancy-driven enclosure flows can be linked to the presence of multiple bifurcation points that yield laminar thermal convective processes that transition from steady to various modes of unsteady flow. This behavior is brought to light by a problem as ''simple'' as a differentially-heated tall rectangular cavity (8:1 height/width aspect ratio) filled with a Boussinesq fluid with Pr = 0.71--which defines, at least partially, the focus of this special session. For our purposes, the differentially-heated cavity provides a virtual fluid dynamics laboratory.
Date:
August 14, 2000
Creator:
Christon, M A; Gresho, P M & Sutton, S B
Object Type:
Article
System:
The UNT Digital Library
Liquid Scoping Study for Tritium-Lean, Fast Ignition Inertial Fusion Energy Power Plants
In a thick-liquid protected chamber design, such as HYLIFE-II, a molten-salt is used to attenuate neutrons and protect the chamber structures from radiation damage. The molten-salt absorbs some of the material and energy given off by the target explosion. In the case of a fast ignition inertial fusion system, advanced targets have been proposed that may be Self-sufficient in the tritium breeding (i.e., the amount of tritium bred in target exceeds the amount burned). These ''tritium-lean'' targets contain approximately 0.5% tritium and 99.5% deuterium, but require a large pr of 10-20 g/cm{sup 2}. Although most of the yield is provided by D-T reactions, the majority of fusion reactions are D-D, which produces a net surplus of tritium. This aspect allows for greater freedom when selecting a liquid for the protective blanket (lithium-bearing compounds are not required). This study assesses characteristics of many single, binary, and ternary molten-salts. Using the NIST Properties of Molten Salts Database, approximately 4300 molten-salts were included in the study [1]. As an initial screening, salts were evaluated for their safety and environmental (S&E) characteristics, which included an assessment of waste disposal rating, contact dose, and radioactive afterheat. Salts that passed the S&E criteria were then evaluated …
Date:
August 14, 2001
Creator:
Schmitt, R. C.; Latkowski, J. F.; Durbin, S. G.; Meier, W. R. & Reyes, S.
Object Type:
Report
System:
The UNT Digital Library
Chemistry and Materials Science Directorate 2002 Postdoctoral Symposium
The understanding of the physical mechanisms by which important biological inhibitors control the nucleation, growth, aggregation, and phase transformation of calcium oxalate crystals at fundamental level is of importance not only to the advances in biomineralization but also to the development of stone disease therapy. Of the three phases of calcium oxalate crystalline, calcium oxalate monohydrate (COM) and dehydrate (COD) are found in the majority of stones formed in the urinary system. Only COM, a major inorganic component of kidney stones, produces adverse physiological effects to human, however. Although a great deal of research has been carried out on the modulation of nucleation, growth, aggregation, and phase transformation of calcium oxalates by biological molecules, the basic mechanism has not yet been determined due to inherent limitations of those techniques that have been utilized The invention of atomic force microscopy (AFM) has opened a new avenue for the study of the crystal growth in general. One can now probe the growth kinetics and dynamics, and morphology of crystal surfaces down to molecular levels as a typical AFM has a lateral resolution of nanometers. In this study, in situ AFM was used to monitor the COM surface under controlled growth conditions. The …
Date:
August 14, 2002
Creator:
Wirth, B D
Object Type:
Report
System:
The UNT Digital Library
National Ignition Facility Project Execution Plan
The ''National Ignition Facility (NIF) Justification of Mission Need'', which was approved by the Secretary of Energy in January 1993, defines the mission of the National Inertial Confinement Fusion (ICF) Program and discusses the specific mission of the NIF Project. The NIF experimental capability will allow nuclear-weapons scientists to assess stockpile problems, verify computational tools, test for nuclear-weapons effects, and increase their understanding of weapons physics. The three weapons laboratory directors and the National Nuclear Security Administration (NNSA) Deputy Administrator for Defense Programs have reviewed the role of the NIT; in Stockpile Stewardship in a joint letter. Along with the Accelerated Strategic Computing Initiative numerical simulations and other aboveground experimental facilities, the NIF will provide critical data that will allow the United States to maintain its technical capabilities in nuclear weapons in the absence of underground testing. As a secondary objective, the NIF will advance our understanding of ICF and help to assess its potential as an energy source. Achieving fusion ignition in the NIF will advance both defense and energy objectives. In affirming the Project's Critical Decision 2,* ''Approval of New Start'', the Secretary of Energy verified the mission need and emphasized that the NIF has the potential to …
Date:
August 14, 2000
Creator:
Moses, Edward
Object Type:
Report
System:
The UNT Digital Library
Research and Development for X-Ray Optics and Diagnostics on the Linac Coherent Light Source (LCLS)
The Linac Coherent Light Source (LCLS) is a 1.5 to 15 {angstrom}-wavelength free-electron laser (FEL), currently proposed for the Stanford Linear Accelerator Center (SLAC). The photon output consists of high brightness, transversely coherent pulses with duration <300 fs, together with a broad spontaneous spectrum with total power comparable to the coherent output. The output fluence, and pulse duration, pose special challenges for optical component and diagnostic designs. We first discuss the specific requirements for the initial scientific experiments, and our proposed solutions. We then describe the supporting research and development program that includes: experimental and theoretical material damage studies; high resolution multilayer design, fabrication, and testing; replicated closed-form optics design and manufacturing; BeB manufacturing; and low-z Fresnel lens design, fabrication and testing. Finally some novel concepts for optical components are presented.
Date:
August 14, 2001
Creator:
Wootton, A.; Arthur, J.; Barbee, T.; Bionta, R.; Jankowski, Alan Frederic; London, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Characteristics of Workload on Asci Blue-Pacific at Lawrence Livermore National Laboratory
Symmetric multiprocessor (SMP) clusters have become the prevalent computing platforms for large-scale scientific computation in recent years mainly due to their good scalability. In fact, many parallel machines being used at supercomputing centers and national laboratories are of this type. It is critical and often very difficult on such large-scale parallel computers to efficiently manage a stream of jobs, whose requirement for resources and computing time greatly varies. Understanding the characteristics of workload imposed on a target environment plays a crucial role in managing system resources and developing an efficient resource management scheme. A parallel workload is analyzed typically by studying the traces from actual production parallel machines. The study of the workload traces not only provides the system designers with insight on how to design good processor allocation and job scheduling policies for efficient resource management, but also helps system administrators monitor and fine-tune the resource management strategies and algorithms. Furthermore, the workload traces are a valuable resource for those who conduct performance studies through either simulation or analytical modeling. The workload traces can be directly fed to a trace-driven simulator in a more realistic and specific simulation experiments. Alternatively, one can obtain certain parameters that characterize the workload …
Date:
August 14, 2000
Creator:
Yoo, A. B. & Jette, M. A.
Object Type:
Article
System:
The UNT Digital Library
HGMF of 10-L solutions
This test plan describes the activities associated with the High Gradient Magnetic Filtration (HGMF) of plutonium-bearing solutions (10-L). The 10-L solutions were received from Argonne National Laboratories in 1972, are highly acidic, and are considered unstable. The purpose of the testing is to show that HGMF is an applicable method of removing plutonium precipitates from solution. The plutonium then can be stored safely in a solid form.
Date:
August 14, 1994
Creator:
Larkin, K. A.
Object Type:
Report
System:
The UNT Digital Library
Estimates of rates and errors for measurements of direct-{gamma} and direct-{gamma} + jet production by polarized protons at RHIC
Studies of inclusive direct-{gamma} production by pp interactions at RHIC energies were performed. Rates and the associated uncertainties on spin-spin observables for this process were computed for the planned PHENIX and STAR detectors at energies between {radical}s = 50 and 500 GeV. Also, rates were computed for direct-{gamma} + jet production for the STAR detector. The goal was to study the gluon spin distribution functions with such measurements. Recommendations concerning the electromagnetic calorimeter design and the need for an endcap calorimeter for STAR are made.
Date:
August 14, 1992
Creator:
Beddo, M. E.; Spinka, H. & Underwood, D. G.
Object Type:
Report
System:
The UNT Digital Library
The Simplification of Building Census Input for a Physical Model of Space-Heating Demands
None
Date:
August 14, 1978
Creator:
Starr, A. M.
Object Type:
Article
System:
The UNT Digital Library
Status of plutonium trichloride process development (2)
The development of a reduction step using plutonium trichloride instead of plutonium tetrafluoride in 234-5 Building processing was proposed early in 1958. This process change was intended to reduce the neutron radiation associated with plutonium fluoride. Neutron dose estimates shaw that over half of 234-5 Building neutron exposure is associated with the fluoride process steps. Other measurements show that a 60-fold reduction in neutron flux could be realized by converting to a chloride process. Progress up to September 1958, was described in a document covering the chemical aspects of the development work, including batch preparation of trichloride. The present report summarizes work done on this process over the past year, emphasizing continuous preparation of plutonium trichloride in large-scale equipment, the reduction of this product to metal, and large-scale recovery of slag and crucible.
Date:
August 14, 1959
Creator:
Hopkins, H. H. Jr.
Object Type:
Report
System:
The UNT Digital Library
Design scope: Activated silica-alum water treatment facilities, reactor areas B, D, F, DR and H
It is the purpose of this document to describe the proposed modifications to the cooling water treatment process used in reactor areas B, D, F, DR and H.
Date:
August 14, 1952
Creator:
Fox, J. M. Jr.
Object Type:
Report
System:
The UNT Digital Library
Organic acid modeling and model validation: Workshop summary. Final report
A workshop was held in Corvallis, Oregon on April 9--10, 1992 at the offices of E&S Environmental Chemistry, Inc. The purpose of this workshop was to initiate research efforts on the entitled ``Incorporation of an organic acid representation into MAGIC (Model of Acidification of Groundwater in Catchments) and testing of the revised model using Independent data sources.`` The workshop was attended by a team of internationally-recognized experts in the fields of surface water acid-bass chemistry, organic acids, and watershed modeling. The rationale for the proposed research is based on the recent comparison between MAGIC model hindcasts and paleolimnological inferences of historical acidification for a set of 33 statistically-selected Adirondack lakes. Agreement between diatom-inferred and MAGIC-hindcast lakewater chemistry in the earlier research had been less than satisfactory. Based on preliminary analyses, it was concluded that incorporation of a reasonable organic acid representation into the version of MAGIC used for hindcasting was the logical next step toward improving model agreement.
Date:
August 14, 1992
Creator:
Sullivan, T. J. & Eilers, J. M.
Object Type:
Report
System:
The UNT Digital Library
Columbia River temperature survey at Hanford Engineer Works. Final report
It was agreed during a meeting on July 10, 1945, investigation should be made to determine how fast and in what fashion the temperature of the effluent water from the 100 Areas is dissipated in the Columbia River. A preliminary report on these investigation was issued March 1, 1946: it discussed the testing techniques developed and the results of a survey made at the 100-B Area. Following a review of the data and tentative conclusions resented therein, it was agreed to extend the survey using similar technique: to the D and F Areas, and to determine if the tentative conclusions were substantiated.
Date:
August 14, 1946
Creator:
Osterloh, R. H. & Lewis, W. R.
Object Type:
Report
System:
The UNT Digital Library
Method for preparing homogeneous single crystal ternary III-V alloys
A method for producing homogenous single crystal III--V ternary alloys of high crystal perfection using a floating crucible system in which the outer crucible holds a ternary alloy of the composition desired to be produced in the crystal and an inner floating crucible having a narrow, melt-passing channel in its bottom wall holds a small quantity of melt of a pseudo-binary liquidus composition which would freeze into the desired crystal composition. The alloy of the floating crucible is maintained at a predetermined lower temperature than the alloy of the outer crucible, and a single crystal of the desired homogeneous alloy is pulled out of the floating crucible melt, as melt from the outer crucible flows into a bottom channel of the floating crucible at a rate that corresponds to the rate of growth of the crystal.
Date:
August 14, 1990
Creator:
Ciszek, T. F.
Object Type:
Patent
System:
The UNT Digital Library