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PWR representative behavior during a LOCA
To date, there has been substantial analytical and experimental effort to define the margins between design basis loss-of-coolant accident (LOCA) behavior and regulatory limits on maximum fuel rod cladding temperature and deformation. As a result, there is extensive documentation on the modeling of fuel rod behavior in test reactors and design basis LOCA's. However, modeling of that behavior using representative, non-conservative, operating histories is not nearly as well documented in the public literature. Therefore, the objective of this paper is (a) to present calculations of LOCA induced behavior for Pressurized Water Reactor (PWR) core representative fuel rods, and (b) to discuss the variability in those calculations given the variability in fuel rod condition at the initiation of the LOCA. This analysis was limited to the study of changes in fuel rod behavior due to different power operating histories. The other two important parameters which affect that behavior, initial fuel rod design and LOCA coolant conditions were held invarient for all of the representative rods analyzed.
Date:
January 1, 1981
Creator:
Allison, C.M.
Object Type:
Article
System:
The UNT Digital Library
Comparison of measured emittance of an H/sup -/ ion beam with a simple theory
Ion beam phase space is frequently modeled with a simple theory having a few parameters; for example, the Kapchinskii-Vladimirskii (K-V) equations. For a real beam the normalized phase-space density par. delta/sup 2/i/par. delta x par. delta in one transverse plane x, averaged over the other plane y, is usually far from that of a K-V distribution. We develop a simple theory based on plasma ion temperature that under some conditions gives a good description of the measured emittance of our H/sup -/ ion beam at about 15 keV.
Date:
June 1, 1981
Creator:
Allison, P.; Sherman, J. D. & Smith, H. V. Jr.
Object Type:
Report
System:
The UNT Digital Library
Progress at LAMPF: Clinton P. Anderson Meson Physics Facility. Progress report, January-June 1981
Progress at LAMPF is the semiannual progress report of the MP Division of the Los Alamos National Laboratory. The report includes brief reports on research done at LAMPF by researchers from other institutions and Los Alamos divisions.
Date:
September 1, 1981
Creator:
Allred, J.C. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Progress at LAMPF: Clinton P. Anderson Meson Physics Facility. Progress report, July-December 1980
Progress at LAMPF is the semiannual progress report of the MP Division of the Los Alamos National Laboratory. The report also includes brief reports on research done at LAMPF by researchers from other institutions and Los Alamos divisions.
Date:
March 1, 1981
Creator:
Allred, J.C. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Operations Experience at the Bevalac Radiotherapy Facility
During the first years of Bevalac operation the biomedical effort concentrated on radiobiology work, laying the foundation for patient radiotherapy. A dedicated radiotherapy area was created in 1978, and in 1979 full-scale patient treatment was begun. As of now over 500 treatments with carbon, neon and argon beams have been delivered to about 50 patients, some as boosts from other modalities and some as complete heavy ion treatments. Up to 12 patients per day have been treated in this facility. Continuing efforts in refining techniques and operating procedures are increasing efficiency and accuracy of treatments, and are contributing to the alleviation of scheduling difficulties caused by the unique requirements of radiotherapy with human patients.
Date:
March 1, 1981
Creator:
Alonso, J. R.; Criswell, T. L.; Howard, J.; Chu, W. T.; Singh, R. P.; Geller, D. et al.
Object Type:
Article
System:
The UNT Digital Library
MHD coal-fired flow facility. Annual technical progress report, October 1979-September 1980
The University of Tennessee Space Institute (UTSI) reports on significant activity, task status, planned research, testing, development, and conclusions for the Magnetohydrodynamics (MHD) Coal-Fired Flow Faclity (CFFF) and the Energy Conversion Facility (ECF).
Date:
March 1, 1981
Creator:
Alstatt, M.C.; Attig, R.C. & Brosnan, D.A.
Object Type:
Report
System:
The UNT Digital Library
Implementation planning for industrial energy conservation: approach and methodology
Details of an industry-specific Conservation Technology Implementation Branch implementation plan is described in detail. CTIB has conducted implementation planning in the steel, pulp/paper, and agriculture/food processing industries, but in FY 1981, CTIB plans to conduct planning for the chemicals, petroleum refining, aluminum, glass, cement, and textile industries. Guidelines are presented for each contractor for each industry toward a common methodology in terms of approach, areas of analysis, assumptions, and reporting. The major parts of the CTIB plan are: an implementation study consisting of technology selection, market demand analysis, and policy analysis, and a plan consisting of a detailed description and schedule of future CTIB actions, followed by a recommended system for monitoring market results when the plan is implemented. (MCW)
Date:
January 1, 1981
Creator:
Alston, T. G.; Falk, G.; Grogan, P. J.; Katz, D. & Tatar, J.
Object Type:
Report
System:
The UNT Digital Library
Performance of dipole magnets in helium II
Data from tests in He II of four 1-meter-long magnets are presented. The maximum quench current is increased up to 30 percent, compared with tests in He I. Data from calorimetric measurements of heat generated during cyclic operation are presented. Quenches were induced by heaters placed near the conductor, and the energy required to induce quenches in He II and in He I are compared.
Date:
March 1, 1981
Creator:
Althaus, R.; Caspi, S.; Gilbert, W.S.; Hassenzahl, W.; Meuser, R.; Rechen, J. et al.
Object Type:
Article
System:
The UNT Digital Library
Theoretical Considerations on the Performance of Negative Sputter Ion Sources
Theoretical analyses of experimentally observed negative ion yield data from cesium rich plasma discharge sources such as those based on the University of Aarhus source concept appear to correlate experiment and theory through surface ionization mechanisms for many species. The agreement between experiment and theory is rather remarkable considering the idealistic model used. A few atomic species appear to overproduce relative to the simple theoretical model. These deviations suggest that still other mechanisms may be important for certain elements such as the affinity level mechanism recently reported.
Date:
January 1, 1981
Creator:
Alton, G. D.
Object Type:
Article
System:
The UNT Digital Library
Applications of nuclear reaction analysis for determining hydrogen and deuterium distribution in metals
The use of ion beams for materials analysis has made a successful transition from the domain of the particle physicist to that of the materials scientist. The subcategory of this field, nuclear reaction analysis, is just now undergoing the transition, particularly in applications to hydrogen in materials. The materials scientist must locate the nearest accelerator, because now he will find that using it can solve mysteries that do not yield to other techniques. 9 figures
Date:
January 1, 1981
Creator:
Altstetter, C.J.
Object Type:
Article
System:
The UNT Digital Library
Power-cable-carrier control (PC/sup 3/) system
A control system has been developed that uses a carrier signal imposed on an existing ac power circuit to transmit commands. This system was specifically developed to control an entire solar collector field by sending sun-tracking information to the trough collectors or by commanding them to assume safe positions (STOW) if out-of-limit conditions were encountered. Objectives were to develop a control system that operates reliably and has enough functions to control an entire collector field, yet do it at less cost than for conventional approaches. Development, design, operating characteristics, and field testing and results of the new system, the Power Cable Carrier Control (PC/sup 3/) System are described.
Date:
April 1, 1981
Creator:
Alvis, R.L.; Wally, K. & Rosborough, J.R.
Object Type:
Report
System:
The UNT Digital Library
Wire rope improvement program. Final report. [For draglines]
Activities in five major areas were undertaken during the WRIP: experiments using PNL-developed bend-over-sheave fatigue test machines to generate data on which to base a model for predicting large-diameter rope performance from that of small-diameter ropes; bend-over-sheave fatigue testing to determine differences in rope failure rates at varying rope loads; analyses to determine how wire ropes actually fail; development of a load sensor to record and quantity operational loads on drag and hoist ropes; and technology transfer activities to disseminate useful program findings to coal mine operators. Data obtained during the 6-year program support are included. High loads on wire ropes are damaging. As an adjunct, however, potentially useful countermeasures to high loads were identified. Large-diameter rope bend-over-sheave performance can be predicted from small-diameter rope test behavior, over some ranges.
Date:
September 1, 1981
Creator:
Alzheimer, J. M.; Anderson, W. E.; Beeman, G. H.; Dudder, G. B.; Erickson, R.; Glaeser, W. A. et al.
Object Type:
Report
System:
The UNT Digital Library
Frontend event selection with an MBD using Q
A problem common to many complex experiments in Nuclear Physics is the need to provide for event selection at a level beyond that readily available in a fast hardware trigger. This may be desirable as a means of reducing the amount of unwanted data going to tape, or be needed to reduce system deadtime, so as not to miss an infrequent good event. The latter criterion is particularly important at low duty factor accelerators such as LAMPF, where instantaneous trigger rates may be quite high. The need for such an event selection mechanism has arisen in conjunction with the installation of a polarimeter in the focal plane of the High Resolution Spectrometer (HRS) at LAMPF. It has been met using a combination of buffered CAMAC electronics and an enhancement to the LAMPF standard Q data acquisition system. The enhancement to Q allows the experimeter to specify at runtime, a set of simple tests to be performed on each event as it is processed by the MBD, and before it is passed to the PDP-11 for taping and further analysis.
Date:
January 1, 1981
Creator:
Amann, J.F.
Object Type:
Article
System:
The UNT Digital Library
Economic effects of petroleum-supply shortfalls on the US economy: alternatives to the SCAM methodology
The DRI Quarterly Macro Model is used to forecast final demands and simulate the base case for the Supply Constrained Analysis Modeling (SCAM) system. As in other commercially available macroeconomic forecasting models, the only expectations formulation used in the DRI Macro Model is adaptive in nature and is estimated with historical data. This is inadequate in modeling short-term major changes in consumption behavior, for example, panic buying of gasoline, when there is a supply shortfall in petroleum. This report describes alternatives to using the DRI Macro Model to estimate the macroeconomic impacts in the SCAM system. The possibility of using models that incorporate the rational expectations formulation was investigated, as was the possibility of modifying the DRI model to better capture short-run consumption behavior. It is suggested that in the absence a good commercially available rational expectations macroeconomic model, the modification of the DRI Macro Model would have the lowest resource cost in terms of person- and computer-hours spent.
Date:
June 1, 1981
Creator:
Anandalingam, G.
Object Type:
Report
System:
The UNT Digital Library
Geophysical study of the crust and upper mantle beneath the central Rio Grande rift and adjacent Great Plains and Colorado Plateau
As part of the national hot dry rock (HDR) geothermal program conducted by Los Alamos Scientific Laboratory, a regional deep magnetotelluric (MT) survey of Arizona and New Mexico was performed. The main objective of the MT project was to produce a regional geoelectric contour map of the pervasive deep electrical conductor within the crust and/or upper mantle beneath the Colorado Plateau, Basin and Range Province, and Rio Grande rift. Three MT profiles cross the Jemez lineament. Preliminary one-dimensional analysis of the data suggest the lineament is associated with anomalously high electrical conductivity very shallow in the crust. An MT/audiomagnetotelluric (AMT) study of a 161 km/sup 2/ HDR prospect was performed on the Zuni Indian Reservation, New Mexico. Two-dimensional gravity modeling of a 700-km gravity profile at 34/sup 0/30'N latitude was used to study the crust and upper mantle beneath the Rio Grande rift. Several models of each of three consecutive layers were produced using all available geologic and geophysical constraints. Two short-wavelength anomalies along the gravity profile were analyzed using linear optimization techniques.
Date:
March 1, 1981
Creator:
Ander, M.E.
Object Type:
Report
System:
The UNT Digital Library
Geologic and geophysical investigations of the Zuni-Bandera volcanic field, New Mexico
A positive, northeast-trending gravity anomaly, 90 km long and 30 km wide, extends southwest from the Zuni uplift, New Mexico. The Zuni-Bandera volcanic field, an alignment of 74 basaltic vents, is parallel to the eastern edge of the anomaly. Lavas display a bimodal distribution of tholeiitic and alkalic compositions, and were erupted over a period from 4 Myr to present. A residual gravity profile taken perpendicular to the major axis of the anomaly was analyzed using linear programming and ideal body theory to obtain bounds on the density contrast, depth, and minimum thickness of the gravity body. Two-dimensionality was assumed. The limiting case where the anomalous body reaches the surface gives 0.1 g/cm/sup 3/ as the greatest lower bound on the maximum density contrast. If 0.4 g/cm/sup 3/ is taken as the geologically reasonable upper limit on the maximum density contrast, the least upper bound on the depth of burial is 3.5 km and minimum thickness is 2 km. A shallow mafic intrusion, emplaced sometime before Laramide deformation, is proposed to account for the positive gravity anomaly. Analysis of a magnetotelluric survey suggests that the intrusion is not due to recent basaltic magma associated with the Zuni-Bandera volcanic field. This …
Date:
May 1, 1981
Creator:
Ander, M.E.; Heiken, G.; Eichelberger, J.; Laughlin, A.W. & Huestis, S.
Object Type:
Report
System:
The UNT Digital Library
PAT-2 (Plutonium Air-Transportable Model 2) safety analysis report
The PAT-2 package is designed for the safe transport of plutonium and/or uranium in small quantities. The PAT-2 package is resistant to severe accidents, including that of a high-speed jet aircraft crash, and is designed to withstand such environments as extreme impact, crushing, puncturing and slashing loads, severe hydrocarbon-fueled fires, and deep underwater immersion, with no escape of contents. The package meets the requirements of 10 CFR 71 for Fissile Class I packages with a cargo of 15 grams of Pu-239, or other isotopic forms described herein, not to exceed 2 watts of thermal activity. This SAR presents design and oprational information including evaluations and analyses, test results, operating procedures, maintenance, and quality assurance information.
Date:
July 1, 1981
Creator:
Andersen, J. A.; Davis, E. J.; Duffey, T. A.; Dupree, S. A.; George, O. L. Jr. & Ortiz, Z.
Object Type:
Report
System:
The UNT Digital Library
Wind energy resource atlas. Volume 8. The southern Rocky Mountain region
The Southern Rocky Mountain atlas assimilates five collections of wind resource data: one for the region and one for each of the four states that compose the Southern Rocky Mountain region (Arizona, Colorado, New Mexico, and Utah). At the state level, features of the climate, topography and wind resource are discussed in greater detail than is provided in the regional discussion, and the data locations on which the assessment is based are mapped. Variations, over several time scales, in the wind resource at selected stations in each state are shown on graphs of monthly average and interannual wind speed and power, and hourly average wind speed for each season. Other graphs present speed, direction, and duration frequencies of the wind at these locations.
Date:
March 1, 1981
Creator:
Andersen, S. R.; Freeman, D. L.; Hadley, D. L.; Elliott, D. L.; Barchet, W. R. & George, R. L.
Object Type:
Report
System:
The UNT Digital Library
Shock initiation of porous TATB
The planar shock initiation of 1.8-g/cm/sup 3/ TATB has been studied with embedded-Manganin pressure gauges and with the explosive wedge technique. A Lagrangian analysis and an assumed equation of state were used to determine reaction histories during the initiation process. Correlation of reaction rates to state variables has resulted in a shock-strength modified Arrhenius rate law. Numerical simulations employing the rate law have been performed for a number of initiation experiments on TATB.
Date:
January 1, 1981
Creator:
Anderson, A. B.; Ginsberg, M. J.; Seitz, W. L. & Wackerle, J.
Object Type:
Article
System:
The UNT Digital Library
Computational experiences with variable modulus, elastic-plastic, and viscoelastic concrete models. [HTGR]
Six years ago the Reactor Safety Research Division of the Nuclear Regulatory Commission (NRC) approached the Los Alamos National Laboratory to develop a comprehensive concrete structural analysis code to predict the static and dynamic behavior of Prestressed Concrete Reactor Vessels (PCRVs) that serve as the containment structure of a High-Temperature Gas-Cooled Reactor. The PCRV is a complex concrete structure that must be modeled in three dimensions and posseses other complicating features such as a steel liner for the reactor cavity and woven cables embedded vertically in the PCRV and wound circumferentially on the outside of the PCRV. The cables, or tendons, are used for prestressing the reactor vessel. In addition to developing the computational capability to predict inelastic three dimensional concrete structural behavior, the code response was verified against documented experiments on concrete structural behavior. This code development/verification effort is described.
Date:
January 1, 1981
Creator:
Anderson, C. A.
Object Type:
Article
System:
The UNT Digital Library
Containment buckling program. [PWR; BWR]
The Containment Buckling program at the Los Alamos National Laboratory is aimed at evaluating the adequacy of the current design procedures for free standing steel nuclear containment shells against static and dynamic structural instability. Such buckling behavior will typically produce large displacements in the shell wall that will potentially violate seals around hatches and penetrations, or even produce puncture or tearing of the shell wall resulting in a loss of containment function. The ultimate goal of the program is to provide NRC with a basis for evaluating the associated licensing issues and to recommend appropriate changes and additions to the NRC Review Criteria.
Date:
January 1, 1981
Creator:
Anderson, C. A. & Bennett, J. G.
Object Type:
Article
System:
The UNT Digital Library
Analytical and numerical calculations of field-reversed theta-pinch equilibria based on a generalized Hill's vortex model
We have been investigating methods for numerically extending the analytic solutions of field reversed theta pinch equilibria so that the results may be used in various stability and dynamics studies. We have used generalizations of elliptical Hill's vortex equilibria which accomodate separatrices with more rectangular shapes and which allow plasma to exist outside the separatrix. Although the equilibria are specified analytically inside the plasma surface, numerical techniques are required to generate the solution in the vacuum region. Two computer codes have been used in sequence. The first determines a set of external coils and their currents so that they match the known coil field inside the plasma. Then, given this coil field, we compute the contribution from the plasma currents to the fields in the vacuum region.
Date:
October 1, 1981
Creator:
Anderson, D. V.; Hammer, J. H. & Barnes, D. C.
Object Type:
Article
System:
The UNT Digital Library
Gas scintillation proportional counters
The principle of operation of the gas scintillation proportional counter and a history of its developmnt is presented here. Its advantages and possible applications are also considered.
Date:
January 1, 1981
Creator:
Anderson, D.F.
Object Type:
Article
System:
The UNT Digital Library
Wide-range tritium monitor
An ionization chamber consisting of two active volumes in a single enclosure and an auto range changing electrometer covering a dynamic range of 10/sup 8/ are discussed. The tritium monitor is designed to have a reduced sensitivity to tritium contamination, to have a fast response, and to be useful for tritium concentrations of a few ..mu..Ci/m/sup 3/ to 10/sup 8/ ..mu..Ci/m/sup 3/.
Date:
January 1, 1981
Creator:
Anderson, D.F. & Hiebert, R.D.
Object Type:
Article
System:
The UNT Digital Library