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Progress of soil radionuclide distribution studies for the Nevada Applied Ecology Group: 1981
Two nuclear sites have been under intensive study by the Nevada Applied Ecology Group (NAEG) during 1980 and 1981, NS201 in area 18 and NS219,221 in area 20. In support of the various studies Los Alamos National Laboratory (Group LS-6) has provided consultation and evaluations relative to radionuclide distributions in soils inundated with radioactive debris from those tests. In addition, a referee effort was also conducted in both analysis of replicate samples and in evaluating various data sets for consistency of results. This report summarizes results of several of the data sets collected to test certain hypotheses relative to radionuclide distributions and factors affecting calculations of hypotheses relative to radionuclide distributions and factors affecting calculations of radionuclide inventories and covers the period February 1980 to May 1981.
Date:
January 1, 1981
Creator:
Essington, E.H.
Object Type:
Article
System:
The UNT Digital Library
Microprocessor-based single board computer for high energy physics event pattern recognition
A single board MC 68000 based computer has been assembled and bench marked against the CDC 7600 running portions of the pattern recognition code used at the MPS. This computer has a floating coprocessor to achieve throughputs equivalent to several percent that of the 7600. A major part of this work was the construction of a FORTRAN compiler including assembler, linker and library. The intention of this work is to assemble a large number of these single board computers in a parallel FASTBUS environment to act as an on-line and off-line filter for the raw data from MPS II and ISABELLE experiments.
Date:
January 1, 1981
Creator:
Bernstein, H.; Gould, J. J.; Imossi, R.; Kopp, J. K.; Love, W. A.; Ozaki, S. et al.
Object Type:
Article
System:
The UNT Digital Library
Size effect related to damping caused by water submersion
An important effect of water submersion on the dynamic response of a structure is the increase in effective damping. The dynamic response of submerged structures is of interest in the nuclear power industry for reasons of operational safety during seismic and other dynamic excitations. In this paper, the added damping contribution that results from the viscosity of water and the dependence of the contribution on structural size are examined. Other factors considered are the applicable range of viscous damping with respect to displacement amplitude and, as far as damping is concerned, how far neighboring members must be from each other to respond as if in open water. An expression is derived for relating the damping value to structural size. Estimated added-damping values for representative fuel elements, fuel bundles, and main steam-pressure-relief-valve lines are given based on our derived expression for added damping.
Date:
January 1, 1981
Creator:
Dong, R.G.
Object Type:
Article
System:
The UNT Digital Library
Neutrino mixing in SO(10)*
The question of neutrino mixing is considered within the grand unified field theory. (GHT)
Date:
January 1, 1981
Creator:
Milton, K. & Tanaka, K.
Object Type:
Article
System:
The UNT Digital Library
Control electronics of the PEP RF system
The operation of the major components used for controlling the phase and field level of the PEP RF cavities is described. The control electronics of one RF station is composed of several control loops: each cavity has a tuners' servo loop which maintains the frequency constant and also keeps the fields of each cavity balanced; the total gap voltage developed by a pair of cavities is regulated by a gap voltage controller; finally, the phase variation along the amplification chain, the klystron and the cavities are compensated by a phase lock loop. The design criteria of each loop are set forth and the circuit implementation and test results are presented.
Date:
January 1, 1981
Creator:
Pellegrin, J.L. & Schwarz, H.
Object Type:
Article
System:
The UNT Digital Library
Well descriptions for geothermal drilling
Generic well models have been constructed for eight major geothermal resource areas. The models define representative times and costs associated with the individual operations that can be expected during drilling and completion of geothermal wells. They were made for and have been used to evaluate the impacts of potential new technologies. Their nature, their construction, and their validation are discussed.
Date:
January 1, 1981
Creator:
Carson, C. C. & Livesay, B. J.
Object Type:
Article
System:
The UNT Digital Library
INTOR radiation shielding for personnel access
The INTOR reactor shield system consists of the blanket, bulk shield, penetration shield, component shield, and biological shield. The bulk shield consists of two parts: (a) the inboard shield; and (b) the outboard shield. The distinction between the different components of the shield system is essential to satisfy the different design constraints and achieve various objectives.
Date:
January 1, 1981
Creator:
Gohar, Y. & Abdou, M.
Object Type:
Article
System:
The UNT Digital Library
Sensitivity coefficients for the /sup 238/U neutron-capture shielded-group cross sections
In the unresolved resonance region cross sections are represented with statistical resonance parameters. The average values of these parameters are chosen in order to fit evaluated infinitely dilute group cross sections. The sensitivity of the shielded group cross sections to the choice of mean resonance data has recently been investigated for the case of /sup 235/U and /sup 239/Pu by Ganesan and by Antsipov et al; similar sensitivity studies for /sup 238/U are reported. (WHK)
Date:
January 1, 1981
Creator:
Munoz-Cobos, J.L.; de Saussure, G. & Perez, R.B.
Object Type:
Article
System:
The UNT Digital Library
Nuclei far from stability using exotic targets
The meson factories such as the Los Alamos Meson Physics Facility have made possible high fluence medium energy proton beams that can be used for spallation reactions to produce macro quantities of unstable isotopes. Targets of over 10 g/cm/sup 2/ can be exposed to total fluence approaching 1 A-hour resulting in spallation yields in the 0.01-10 mg range for many isotopes of potential interest for nuclear structure studies. With the use of hot cell facilities, chemical processing can isolate the desired material and this coupled with subsequent isotope separation can result in usable quantities of material for nuclear target application. With off-stable isotopes as target materials, conventional nuclear spectroscopy techniques can be employed to study nuclei far from stability. The irradiation and processing requirements for such an operation, along with the isotope production possibilities, are discussed. Also presented are initial experiments using a /sup 148/Gd (t/sub 1/2/ = 75a) target to perform the (p,t) reaction to establish levels in the proposed double magic nucleus /sup 146/Gd.
Date:
January 1, 1981
Creator:
Wilhelmy, J. B.; Bentley, G. E.; Thomas, K. E.; Brown, R. E.; Flynn, E. R.; Van der Plicht, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Thermal propagation of normal-superconductor boundaries
The model of Newhouse for thermal propagation of long normal regions in thin superconducting films on good thermal conducting substrates has been verified. Measurements show much slower velocities for short regions, but the dependence is compatible with a new model calculation. Stable hot spots are found which agree semi-quantitatively with a modified hot-spot calculation.
Date:
January 1, 1981
Creator:
Gray, K.E.; Zasadzinski, J. & Kampwirth, R.T.
Object Type:
Article
System:
The UNT Digital Library
Consolidated fuel-reprocessing program:: man/machine interface development for the REMOTEX concept
This paper describes ongoing research at ORNL to develop a man/machine interface system that can be used to remotely control a system composed of a transporter base and a force-reflecting, servo-controlled manipulator. A unique feature of the concept is the incorporation of totally remote operation. Thus, a major objective is the requirement that an operator have a sense of presence in the remote environment. Man/machine interface requirements for this totally remote operation remain to be developed. Therefore, a simulator is being built to optimize such requirements and the developments are discussed.
Date:
January 1, 1981
Creator:
Garin, J. & Clarke, M.M.
Object Type:
Article
System:
The UNT Digital Library
Quality-Assurance Approach for the Elmo Bumpy Torus Proof-of-Principal Experiment
Components, subsystems and systems will be subjected to inspection and test as necessary to ensure compliance to applicable specifications, Acceptance Test Procedures and/or customer requirements. Quality Assurance will inspect each component, subsystem and system for selected mechanical and electrical defects. In addition, Quality Assurance will either perform, or verify performance of, and analyze, or verify analysis of, all required field and laboratory tests. If hardware is modified, repaired or replaced after final testing, necessary re-inspection and retest must be performed. Insofar as possible the component, subsystem or system will be released as acceptable upon completion of these activities. When nonconformances are detected during the course of site surveillance activities, MDAC or Gilbert/Commonwealth will initiate a Nonconformance Record for review by MDAC Quality Assurance and Project Engineering personnel. These nonconformances will be identified and dispositioned per MDAC Standard Practices with the advice and concurrence of Gilbert/Commonwealth personnel, if deemed appropriate. MDAC Quality Assurance personnel will witness the pre-operational testing and review the test data.
Date:
January 1, 1981
Creator:
Sticksel, F. M.
Object Type:
Article
System:
The UNT Digital Library
Assessment of taxicab fleet operation in New York City
A preliminary assessment of the impacts resulting from incorporation of flywheel energy storage systems into automotive fleets in a large metropolitan city is described. Specifically, the case of taxicab fleet operation within New York City is examined. Based upon available taxicab operational data, a levelized life-cycle cost comparison between a standard internal combustion engine vehicle in present use as a taxicab and a projected hybrid flywheel-internal combustion engine vehicle (taxicab) has been generated. Energy conservation and environmental benefits are discussed and potential institutional barriers to rapid deployment of flywheel energy storage systems are identified. The results obtained from this study generally emphasize the value of incorporating flywheel energy storage systems into future vehicles designed for taxicab use.
Date:
January 1, 1981
Creator:
Krupka, M.C. & Jackson, S.V.
Object Type:
Article
System:
The UNT Digital Library
Comparative analysis of combined flat-plate PV/T collectors with separate photovoltaic and thermal collectors
The conditions under which a combined photovoltaic/thermal (PV/T) collector is more cost effective than separate flat-plate photovoltaic and thermal collectors are determined. The annual performance of the separate PV/T system and four different combined PV/T systems are simulated. Based on the equivalent electrical and thermal outputs and the 1986 DOE cost goal for PV modules (70 cents/Wp), the maximum allowable incremental cost to upgrade the conventional thermal collector to a combined PV/T collector is determined. For all of the cases considered in this study, the separate PV/T collectors are more cost effective than the combined PV/T collectors.
Date:
January 1, 1981
Creator:
Hoover, E.R.
Object Type:
Article
System:
The UNT Digital Library
Investigation of Methods for Fabricating, Characterizing, and Transporting Cryogenic Inertial-Confinement-Fusion Tartets
The objective of this work is to investigate methods for fabricating, characterizing and transporting cryogenic inertial confinement fusion targets on a continuous basis. A microprocessor-based data acquisition system has been built that converts a complete target image to digital data, which are then analyzed by automated software procedures. The low temperatures required to freeze the hydrogen isotopes contained in a target is provided by a cryogenic cold chamber capable of attaining 15 K. A new method for target manipulation and positioning is studied that employs molecular gas beams to levitate a target and an electrostatic quadrupole structure to provide for its lateral containment. Since the electrostatic target-positioning scheme requires that the targets be charged, preliminary investigation has been carried out for a target-charging mechanism based on ion-bombardment.
Date:
January 1, 1981
Creator:
Fanning, J. J. & Kim, K.
Object Type:
Report
System:
The UNT Digital Library
Direct analysis of plutonium metal for gallium, iron, and nickel by energy dispersive x-ray spectrometry
An x-ray secondary target method for routine determination of gallium, iron, and nickel in plutonium metal is described that has significant advantages over wet chemical analysis. Coupons requiring minimal preparation for analysis are produced as a breakaway tab on the plutonium ingot. All three elements are determined on the same coupon. Gallium is determined using an arsenic secondary target followed by iron and nickel using a zinc target. The analysis times are 5 minutes for gallium and 15 minutes for the combined iron and nickel. The method of analysis was evaluated in the range of from 0.5 to 1.5% gallium. Iron was investigated over the range of 67 to 3000 ppM and nickel from 64 to 110 ppM.
Date:
January 1, 1981
Creator:
Bramlet, H.L. & Doyle, J.H.
Object Type:
Article
System:
The UNT Digital Library
Molecular-dynamics study of 2-D melting: long-range potentials
Melting of a two-dimensional electron lattice and a two-dimensional dipolar solid are studied using molecular-dynamics techniques. The existence of hysteresis and latent heat of melting are observed, and the melting transitions in the two cases are found to be first order. For an electron lattice the melting occurs between GAMMA=129 +- 3 whereas in the dipolar solid it is between GAMMA=62 +- 3, with a transition entropy of 0.3 k/sub B/ per particle for both the systems.
Date:
January 1, 1981
Creator:
Kalia, R.K. & Vashishta, P.
Object Type:
Article
System:
The UNT Digital Library
Experimental study of the flowfield of a V-shaped premixed turbulent flame
The flowfield of a V-shaped, premixed ethylene/air flame in grid induced turbulence has been studied using Laser Doubler Velocimetry. The experimental conditions covered free-stream velocities of 5 and 7 m/s and equivalence ratios ranging from 0.6 to 0.78. The two-dimensional velocity vectors obtained indicate that flow deflection in the free stream was significant and seemed to correlate with the flame angle. The influence of the flame holder wake on the flame was demonstrated. In the presence of the flame, an increase in the turbulence level in the free stream was found and was attributed to fluctuations in flow deflection induced by the fluctuating flame.
Date:
January 1, 1981
Creator:
Cheng, R.K. & Ng, T.T.
Object Type:
Article
System:
The UNT Digital Library
Superconducting conversion of the Oak Ridge Isochronous Cyclotron
The superconducting conversion of the Oak Ridge Isochronous Cyclotron (ORIC) will replace the existing aluminum main magnet coils with a NbTi superconducting coil system to provide an increase in magnetic field from 1.9 to 3.3 T. The higher magnetic field will provide a three-fold increase in maximum energy capability of the cyclotron for high mass ions. The conversion will include a new beam extraction system, magnet yoke stiffening to counteract the increased magnetic forces, and minor modifications to the beam transport systems and shielding.
Date:
January 1, 1981
Creator:
Martin, J. A.; Ball, J. B. & Cleary, E. D.
Object Type:
Article
System:
The UNT Digital Library
Groundwater-stream-simulation experiments for the evaluation of the safety of proposed nuclear waste repositories
A bench-scale experimental design which integrates repository components to simulate a groundwater stream infiltrating a breached repository is described in this paper. An experiment performed with a nuclear waste solid and one rock core is briefly summarized. The nuclear waste solid consists of borosilicate glass containing formulated nuclear waste and is the source of the leached radionuclides. The rock core used is of granite and serves as the adsorption medium for the leached radionuclides. (DMC)
Date:
January 1, 1981
Creator:
Seitz, M.G.
Object Type:
Article
System:
The UNT Digital Library
Summary report on large HVEC accelerators
The main features are described of the ten presently operating large HVEC tandem accelerators and of four additional HVEC accelerators which are in different stages of testing, construction or planning. Present performance characteristics are discussed as well as available information about long term reliability. Some recent improvements are mentioned and comparisons are drawn for acceleration tube gradients in various different configurations and accelerators. Finally, some possible future developments are indicated.
Date:
January 1, 1981
Creator:
Thieberger, P.
Object Type:
Article
System:
The UNT Digital Library
Removal of salt from high-level waste tanks by density-driven circulation or mechanical agitation
Twenty-two high-level waste storage tanks at the Savannah River Plant are to be retired in the tank replacement/waste transfer program. The salt-removal portion of this program requires dissolution of about 19 million liters of salt cake. Steam circulation jets were originally proposed to dissolve the salt cake. However, the jets heated the waste tank to 80 to 90/sup 0/C. This high temperature required a long cooldown period before transfer of the supernate by jet, and increased the risk of stress-corrosion cracking in these older tanks. A bench-scale investigation at the Savannah River Laboratory developed two alternatives to steam-jet circulation. One technique was density-driven circulation, which in bench tests dissolved salt at the same rate as a simulated steam circulation jet but at a lower temperature. The other technique was mechanical agitation, which dissolved the salt cake faster and required less fresh water than either density-driven circulation or the simulated steam circulation jet. Tests in an actual waste tank verified bench-scale results and demonstrated the superiority of mechanical agitation.
Date:
January 1, 1981
Creator:
Kiser, D.L.
Object Type:
Report
System:
The UNT Digital Library
Xe/sup +n/-Xe/sup +n/ charge-exchange experiment using a split-beam and beam-intersection technique
We describe a design for colliding-beam charge-exchange experiments using the Xe beam that exits from the 1.5-MV Dynamitron of the Argonne National Laboratory Heavy-Ion-Fusion Facility. These experiments canb e performed at any Xe beam energy as it becomes available, from 1.5 MeV to 10 MeV, and at any charge state from Xe/sup +1/ to Xe/sup +8/.
Date:
January 1, 1981
Creator:
Mazarakis, M. G.; Berry, G. H. & Colton, E. P.
Object Type:
Article
System:
The UNT Digital Library
Some Aspects of Radon and Its Daughter-Products in Man and His Environment
A major but short-lived postprandial increase in the exhalation rate of radon by persons containing no radium was observed. The concentrations of radon and its short-lived daughter-products in houses was unusually high (> 5 to 10 pCi l/sup -1/, > 185 to 370 Bq m/sup -3/) in some houses with unpaved crawl spaces, and with concrete basements. External counting of radon daughter-products in the residents of one of the radon-contaminated houses indicated that there may be interference with the assay of plutonium in the lungs of persons who live in those houses.
Date:
January 1, 1981
Creator:
Rundo, J.; Markun, F.; Plondke, N.J. & Sha, J.Y.
Object Type:
Article
System:
The UNT Digital Library