Serial/Series Title
Fiscal Year 1997
4
Chemical Processing Department Monthly Report
3
ARM Facilities Newsletter
2
Fiscal Year 1996
2
Fiscal Year 2007
2
Proceedings of RIKEN BNL Research Center Workshop
2
Winter Fuels Report
2
A Real-Time Coal Content/Ore Grade (C2OG) Sensor, Technical Report
1
Bench Scale Testing of Micronized Magnetite Beneficiation Progress Report
1
Cross-Roll Flow Forming of ODS Alloy Heat Exchanger Tubes For Hoop Creep Enhancement Quarterly Report
1
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Modification of a hardwired numerical control to include switchable Inch/Metric capability. [Digital logic of Hughes N/C Model 2000 Control on EE Monarch lathe]
A unique and relatively simple method is described for modifying a 1965-vintage hardwired numerical control (N/C) for a machine tool so that it can operate in the SI (Metric) as well as the Inch mode. The modification procedure will be valuable during the transition from Inch to SI measurements, as it allows a numerically-controlled machine tool originally designed to operate only in the Inch mode to be ''recycled'' for SI use. The system digital logic of a Hughes N/C Model 2000 Control on an EE Monarch lathe was modified by changing the modulus of the Command Phase and Reference counters so that the control system has a SI modulus as well as an Inch modulus. The modified system thus allows selection of either the SI operating mode or the Inch mode by a front panel switch.
Date:
April 23, 1976
Creator:
Newton, L. E.
Object Type:
Report
System:
The UNT Digital Library
Transport in compact tori
The parameter B/sub e//nr/sub p/ (here, B/sub e/ is applied magnetic field strength, nr/sub p/ is the plasma density-radius product) is proposed as a key parameter for spheromak heating studies. If B/sub e//nr/sub p/ is too large, increased magnetic fluctuations limit heating; low B/sub e//nr/sub p/ value results in excessive radiation losses. An optimum range appears to be B/sub e//nr/sub p/ approx. 1 to 5 x 10/sup -20/ Wb.
Date:
February 23, 1983
Creator:
Miley, G. H.
Object Type:
Article
System:
The UNT Digital Library
Modeling of transport in the two-dimensional atmospheric transport and kinetics codes SPHERNEW and TRACER
The report describes how transport by the wind is modeled in the 2-D atmospheric transport and chemical kinetics codes SPHERNEW and TRACER. The description includes the equations for transport by a specified velocity field, the eddy diffusion approximation for short-term fluctuations in the velocity, other simplifying approximations, the geometric grid, the difference equations, and the coefficient matrix of the grid. The assumption of a constant vertical density distribution was used to derive mass-consistent forms of the difference equations. These forms eliminate the instabilities and unrealistic solutions associated with specified wind fields which are not exactly mass-consistent. An option is allowed for variable weighting between central (second-order) and upstream (first-order) forms of the spatial differencing of the advection terms, to modulate phase and amplitude errors in the advection model.
Date:
July 23, 1976
Creator:
Edwards, A.
Object Type:
Report
System:
The UNT Digital Library
FB-Line resin testing final report
The Dowex 50W-X8 and 50W-Xl2 resin samples are both strong acid cation materials in the hydrogen form. Each material has a water retention capacity characteristic of its respective marketed degree of cross-linking. Dowex 21K gives confirmatory responses to tests for a strong anion exchange resin in the nitrate form. All three resins have the manufacturer's specified ionic type and form, and the Dowex 50W resins have characteristic water retention capacities. These tests conclude that the ion exchange resins in use in FB-Line meet the approved safety document criteria for cross-linking, ionic form, and resin type.
Date:
January 23, 1992
Creator:
Bannochie, C. J.
Object Type:
Report
System:
The UNT Digital Library
Mass resolved resonance ionization spectroscopy of combustion radicals
This report discusses the following topics: REMPI spectroscopy of HCO and DCO; Rempi spectroscopy of the ethynyl radical; REMPI spectroscopy of new electronic states of C{sub 2}; and a flame sampling laser ionization mass spectrometer.
Date:
June 23, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Three-phase region of D/sub 2/-DT-T/sub 2/
Analogous to the triple point of a pure substance are a binary mixture's triple line and a ternary mixture's three-phase surface, where pressure, temperature, and composition must all be considered. The first three-phase study on a ternary hydrogen system, D/sub 2/-DT-T/sub 2/, is reported.
Date:
June 23, 1977
Creator:
Souers, P. C.; Kelly, E. M.; Roberts, P. E.; Fearon, D. & Tsugawa, R. T.
Object Type:
Article
System:
The UNT Digital Library
TIBER II: Tokamak Ignition/Burn Experimental Reactor: 1986 status report
Several chapters are presented that cover the following areas: (1) physics basis; (2) current drive; (3) compact divertors; (4) neutron shielding; (5) high-current density, radiation-tolerant magnets; and (6) costs. (MOW)
Date:
October 23, 1986
Creator:
Henning, C. D. & Logan, B. G.
Object Type:
Report
System:
The UNT Digital Library
Choice of working fluid and operating conditions for energy conversion with geothermal heat sources
A study of electric power generating cycles which can be used in conjunction with a low-temperature geothermal energy (sensible heat) source is presented. Investigators at Los Alamos Scientific Laboratory have proposed a steam/isobutane dual cycle capable of generating 50.7 Mw of electric power. This cycle is optimized using regenerative feed water heating to yield a power output of 52.1 Mw or an improvement of 2.8%. Other power cycle designs and working fluids are investigated. Working fluids including various freons, steam, isobutane, ammonia, SO/sub 2/, CO/sub 2/, and several low molecular weight alkanes and alkenes are considered. The power cycle designs which are investigated include single and dual Rankine cycles (some of which involve regenerative feed heating), as well as topping/bottoming Rankine cycles, and Brayton gas cycles. The investigation shows that use of a single freon-11 cycle results in a 57.7 Mw power output representing an improvement of 13.8% over the LASL proposal. This cycle represents the best performance of all the combinations investigated, although several other cycles exhibit performance superior to that of the LASL proposal. It is recommended that the freon-11 single cycle be considered on an economic basis as a replacement for the steam/isobutane cycle in the proposed …
Date:
October 23, 1973
Creator:
Landgraf, K. R.; Kudrnac, K. I. & Solares, R.
Object Type:
Report
System:
The UNT Digital Library
Phoebus-2: reflector system assembly procedure
None
Date:
November 23, 1966
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Anion exchange flow sheets and equipment for recovery of Task I filtrates
The filtrate stream from the precipitation--filtration step of the Button Line process must be recycled to recovery operations to reclaim residual plutonium. Present practice is to transfer the filtrates to Recuplex, concentrate by a factor of 6 to 10, and blend into the feed stream for solvent extraction purification. Limited tankage is available for solution storage. Interruption of Recuplex operations necessitates termination of operations in the precipitation-filtration steps and other Button Line areas. Filtrates can be recycled to one of the parent solvent extraction plants for recovery. However, excessive handling operations are encountered by this processing method. This document describes the anion exchange flow sheets and equipment for processing the filtrate stream without dependence upon other recovery operations.
Date:
April 23, 1962
Creator:
Crocker, H. W.
Object Type:
Report
System:
The UNT Digital Library
Fast reactor fluence dosimetry. Technical progress report, January--November 1976. [Neutron monitor based on helium production from (n,. cap alpha. ) reaction with /sup 10/B and /sup 6/Li]
The objectives of this task are to: (1) develop and demonstrate the use of /sup 10/B and /sup 6/Li helium accumulation fluence monitors (HAFM's) as a reliable and accurate method of measuring reactor neutron fluence; (2) develop and apply an expanded set of HAFM's which will provide fluence responses in different but overlapping neutron energy ranges; (3) identify, through the precise measurement of spectrum-integrated helium production cross sections, those elements which produce significant helium when used individually or as components of advanced alloys in FTR and LMFBR neutron environments, so that their use might be eliminated, minimized, or controlled; (4) use this information to predict, with confidence, the helium production rate for any alloy or material considered for fast reactor use, and (5) maintain a centralized helium measurements laboratory available to the research community, and upgrade the sample throughput capacity to handle FTR dosimetry requirements.
Date:
December 23, 1976
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Simulation of the performance of a collection of storage space allocation algorithms
Storage algorithms for reserving and freeing contiguous blocks of storage space were investigated. A simulation program was constructed and run for each method; several different distributions of the parameters that characterize the request for storage space were used. The performance of a noncontiguous storage algorithm was simulated for comparison with the other methods. The effect of disk flaws on the performance of several algorithms was also simulated. The simulation runs showed that the algorithm currently in use at LLL performs best for theoretical distributions of file size and life but that it is not best-suited for the distributions of size and life drawn from the samplings of the LLL machines. The results did not indicate a better-suited choice for the LLL data because samples from different LLL systems resulted in different rankings among the various algorithms. 9 tables.
Date:
September 23, 1976
Creator:
Nichols, J. C.
Object Type:
Report
System:
The UNT Digital Library
Current technology of particle physics detectors
A brief discussion is given of the characteristics required of new accelerator facilities, leading into a discussion of the required detectors, including position sensitive detectors, particle identification, and calorimeters. (LEW)
Date:
June 23, 1986
Creator:
Ludlam, T. W.
Object Type:
Article
System:
The UNT Digital Library
Hot spot exercise: 1975 (HSX-75)
A special unannounced exercise, called HOT SPOT Exercise--1975 (HSX-75), was prepared to test the general capability of the LLL ALERT Program to activate and deploy the LLL and Sandia Laboratory, Livermore (SLL) component of the ERDA/ARG. The exercise activities were limited to the LLL facilities in Livermore and the Site 300 explosive test facility located approximately 15 miles southeast of Livermore. The exercise simulated an accident at a U.S. Army storage facility (Site 300). The simulated accident involved two LLL designed weapons (W-70). One weapon was dropped during unloading operations and ignited the gas tank of the weapon transporter. The subsequent fire caused a low-order detonation of the high explosive component. The fire caused dispersal of fissile material downwind from the site. A second weapon was damaged in the explosion by fragments from the first weapon. The extent of damage to the second weapon was initially unknown. The exercise was conducted on September 23, 1975. A complete description of the specific nature of the simulated accident is contained in the scenario. Umpires were assigned to evaluate and subsequently report on the effectiveness of the response. All test objectives were accomplished. The following appendices are included: operational safety procedures, photographs and …
Date:
August 23, 1976
Creator:
Trolan, R. T.; Wilson, R. L. & Jessen, F. W.
Object Type:
Report
System:
The UNT Digital Library
X-ray instrumentation in the LLL Laser-Fusion Program
The LLL Laser-Fusion Program includes an active experimental effort to measure the distributions in energy, space and time of pulses of soft x-rays (.2 to 10 keV) radiated by laser-induced plasmas. Requirements for high resolution in these measurements clearly preclude the use of conventional x-ray diagnostic techniques. The following examples from our program of advanced x-ray instrument development are described. (1) Wavelength-dispersive spectrographs with fractional-electron volt resolution at several keV and imaging systems with 3 micron resolution over a 100 micron source. (2) Advanced solid state x-ray sensors that recover data from these instruments in a more expedient manner than photographic film. (3) Microcomputer-controlled stand-alone spectrograph data systems and minicomputer-based integrated systems that can deal with the large array of data generated by the high resolution instruments. (4) An electrostatically-deflected x-ray streak camera with moderate spectral and spatial resolution and a timing resolution of better than 15 ps.
Date:
June 23, 1976
Creator:
Koppel, L. N.
Object Type:
Article
System:
The UNT Digital Library
Economics of geothermal electricity generation from hydrothermal resources
The most important factors affecting the economics of geothermal electricity production are the wellhead temperature or enthalpy, the well flow rate, and the cost of the wells. The capital cost of the powerplant is significant, but not highly sensitive to these resource characteristics. The optimum geothermal plant size will remain small, usually in the 50-100 MWe range. Therefore, the opportunities for achieving significant cost reductions through ''economies of scale'' are small. The steam and binary power cycles are closely competitive; the binary cycle appears better when the brine temperature is below 200-230/sup 0/C, and the flashed steam cycle appears better above this range. Geothermal electricity production is capital intensive; over 75 percent of the generation costs are fixed costs related to capital investment. Technological advances are needed to reduce costs from marginal geothermal resources and thus to stimulate geothermal energy development. Significant reduction in power costs would be achieved by reducing well drilling costs, stimulating well flow rates, reducing powerplant capital costs, increasing powerplant efficiency and utilization, and developing more effective exploration techniques for locating and assessing high-quality resources. (auth)
Date:
April 23, 1976
Creator:
Bloomster, C. H. & Knutsen, C. A.
Object Type:
Report
System:
The UNT Digital Library
Data collected by the Shock Wave Data Center
The Shock Wave Data Center of the Lawrence Livermore Lab collects and disseminates P.V.E. data obtained with shock waves. It has been in existence since 1964. An extensive number of papers reporting shock data had become available by that time. This was so in spite of the fact that the technology was developed only during the 2nd World War. Collection and partial evaluation of this data was therefore of value to facilitate its use by our laboratory and others who were involved with science and engineering in the high pressure field. The pressure range of the data collected is quite extensive and extends from 1 MPa to 1 TPa. One very important difference between shock wave compression data and those obtained with static presses must be emphasized, since it is often not fully appreciated. The pressure-volume locus of shock wave states (Hugoniot), which is obtained by passing increasingly stronger shocks into samples with the same initial state, rapidly increases in temperature as the shocks get stronger and the pressure and compression get higher. As a consequence, this Hugoniot locus must have a lower compressibility than isotherms obtained under static conditions. In fact, if porous or otherwise expanded samples are used, …
Date:
June 23, 1976
Creator:
Van Thiel, M.
Object Type:
Article
System:
The UNT Digital Library
Determination of the rate and efficiency of nitrogen transfer from phytoplankton to zooplankton using nitrogen-15 as a tracer. Final report
The rate of assimilated nitrogen transfer from phytoplankton to zooplankton was measured under field conditions for natural mixed zooplankton populations using a nitrogen-15 tracer technique. The variability in rates, which ranged from 0.261 to 1.792 gram-atoms of phytoplankton nitrogen/gram-atoms of zooplankton nitrogen/24 hours, are thought to reflect a variability in the age frequency distribution of the zooplankton population. The data were used to calculate assimilation efficiencies which were found to range from 25.4 to 66.1 percent. The efficiency of 66.1 percent was taken to be the most accurate measurement for reasons discussed in the text.
Date:
February 23, 1976
Creator:
Harris, V M
Object Type:
Report
System:
The UNT Digital Library
Stemming options and their effect on containment
In more than 17 years of studying underground nuclear explosions, LLL has developed containment procedures that include a stemming plan. Stemming plans can be divided into either layered or continuous forms. There are marked differences between standards for these forms. The materials used in the continuous plan must meet more stringent specifications; as a consequence, they are more expensive. Both plans have been successful since the Baneberry Event. Both plans must meet the following requirements: provide a plug sufficient to match the overburden density of earth; contain radioactive gases at the lowest possible depth; minimize the generation of noncondensable gases (such as CO/sub 2/); minimize gas flow rates during the early post-detonation stages when cavity pressure is high; and be compatible with the experiment and its diagnostics. LLL experience in developing containment procedures is reviewed, and the reasons for the adoption of LLL's continuous stemming plan are reported. (LCL)
Date:
June 23, 1976
Creator:
Day, J. A.
Object Type:
Report
System:
The UNT Digital Library
Calorimeter based detectors for high energy hadron colliders
The work was directed in two complementary directions, the D0 experiment at Fermilab, and the GEM detector for the SSC. Efforts have been towards the data taking and analysis with the newly commissioned D0 detector at Fermilab in the [bar p]p Collider run that started in May 1992 and ended on June 1, 1993. We involved running and calibration of the calorimeter and tracking chambers, the second level trigger development, and various parts of the data analysis, as well as studies for the D0 upgrade planned in the second half of this decade. Another major accomplishment was the delivery'' of the Technical Design Report for the GEM SSC detector. Efforts to the overall detector and magnet design, design of the facilities, installation studies, muon system coordination, muon chamber design and tests, muon system simulation studies, and physics simulation studies. In this document we describe these activities separately.
Date:
June 23, 1993
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
SLIC (simple line interface calculation). [Usable in 1, 2, or 3 space dimensions]
SLIC is an alternating-direction method for the geometric approximation of fluid interfaces. It may be used in one, two, or three space dimensions, and it is characterized by the following features: Fluid surfaces are represented locally for each mixed-fluid zone, and these surfaces are defined as a composition of one-space-dimensional components, one for each coordinate direction. These one-dimensional components are composed entirely of straight lines, either perpendicular to or parallel to that coordinate direction. The one-dimensional surface approximations for a mixed fluid cell are completely determined by testing whether or not the various fluids in the mixed cell are present or absent in the zone just to the left and to the right in the coordinate direction under consideration. Because of the completely one-dimensional nature of the SLIC interface description, it is relatively easy to advance the fluid surfaces correctly in time. With the SLIC fluid-surface definitions, it should be possible to incorporate any one-space-dimensional method for advancing contact discontinuities. This makes SLIC very practical for the numerical solution of fluid dynamical problems.
Date:
August 23, 1976
Creator:
Noh, W. F. & Woodward, P.
Object Type:
Report
System:
The UNT Digital Library
Rapidity distributions of K sub s and. Lambda. 's produced by 14. 6 GeV/c Si beams on Si and Pb targets
Excess strangeness production is an expected signal for formation of a Quark-Gluon Plasma and therefore we have been searching for it. We present the first measurements at AGS energies of rapidity distributions of K{sub s} and {Lambda} production with silicon beams on Silicon and Lead targets. The measurements cover the lab rapidity region of 2.0 < y < 3.5 for K{sub s} and 1.4 < y< 3.2 for {Lambda}'s. the gross features of our observation are explainable with a nuclear cascade model including N* (isobaric nucleon) as a significant source of strangeness. The various models used to compare with the data are discussed in the paper.
Date:
June 23, 1992
Creator:
Lindenbaum, S. J.
Object Type:
Article
System:
The UNT Digital Library
Modeling the temperature-dependent scale accumulation from geothermal brine
A simple model for calculating the temperature-dependent deposition of silica scale from geothermal brine is outlined. A finite-difference technique for solving the moving boundary problem is described. The implicit formulation is solved directly, using matrix inverse methods appropriate for banded matrices. The multimaterial problem is defined in a way that maintains the compact matrix bandwidth of a single material. Sample problems are presented in dimensionless form, including a comparison between the finite-difference results and an analytical solution for a single-material slab problem. These initial studies show that the temperature at the brine-scale interface is not significantly perturbed by the growth of a thin scale layer, although pipe thickness and different experimental scale-deposition curves significantly affect the total amount of scale forming over a given period of time.
Date:
September 23, 1976
Creator:
Schroeder, R. C.
Object Type:
Report
System:
The UNT Digital Library
Timing tests: automatic valve closure for tritium leaks
How fast can an automotive valve be closed after a tritium leak occurs in a system. Tests described found that a valve can be closed within fifteen seconds of leakage. In one practical example considered, this delay would limit loss of tritium from a plumbing leak in a tritium system to 1/sup 1///sub 4/ g. The tests were made in a typical LLL air-flush hood in which a tritium handling system had been installed. Incidental observations suggest that further study be made of a possible leak-actuated recovery system for an entire tritium facility.
Date:
July 23, 1976
Creator:
Hanel, S.
Object Type:
Report
System:
The UNT Digital Library