UNT Libraries Government Documents Department - 20 Matching Results

Search Results

Results: 1 - 20
open access

An Analysis of the High-Temperature Particulate Collection Problem

Description: Particulate agglomeration and separation at high temperatures and pressures are examined, with particular emphasis on the unique features of the direct-cycle application of fluidized-bed combustion. The basic long-range mechanisms of aerosol separation are examined, and the effects of high temperature and high pressure on usable collection techniques are assessed. Primary emphasis is placed on those avenues that are not currently attracting widespread research. The high-temperature, particulate… more
Date: October 1977
Creator: Razgaitis, Richard
Item Type: Refine your search to only Report
open access

Autoradiographic Technique for Rapid Inventory of Plutonium-Containing Fast Critical Assembly Fuel

Description: A nondestructive autoradiographic technique is described which can provide a verification of the piece count and the plutonium content of plutonium-containing fuel elements. This technique uses the spontaneously emitted gamma rays from plutonium to form images of fuel elements on photographic film. Autoradiography has the advantage of providing an inventory verification without the opening of containers or the handling of fuel elements. Missing fuel elements, substitution of nonradioactive mate… more
Date: October 1977
Creator: Brumbach, S. B. & Perry, R. B.
Item Type: Refine your search to only Report
open access

Calculated Burnups and Fluences for Experimental Fuel Elements Irradiated in EBR-II Runs 5-55B

Description: A procedure is described for calculation of burnups and fluences at any point in a subassembly in EBR-II runs 5-55B. The calculations are performed by the BRN program package and require data generated for any element in the highly inhomogeneous fueled experimental subassemblies is the most important application of the pointwise capability. Tables allow calculation of burnup and fluences for any element in such a subassembly.
Date: October 1976
Creator: Kucera, D. A. & Meneghetti, D.
Item Type: Refine your search to only Report
open access

Computation of the Weight Function from a Stress Intensity Factor

Description: A simple representation for the crack-face displacement is employed to compute a weight function solely from stress intensity factors for a reference loading configuration. Crack face displacements given by the representation are shown to be in good agreement with analytical results for cracked tensile strips, and stress intensity factors computed from the weight function agree well with those for edge cracks in half planes, radial cracks from circular holes, and radially cracked rings. The tec… more
Date: October 1977
Creator: Petroski, H. J. & Achenbach, J. D.
Item Type: Refine your search to only Report
open access

Cracking and Healing Behavior of UO2 as Related to Pellet-Cladding Mechanical Interaction : Interim Report, July 1976

Description: A direct-electrical-heating apparatus has been designed and fabricated to investigate those nuclear-fuel-related phenomena involved in the gap closure-bridging annulus formation mechanism that can be reproduced in an out-of-reactor environment. Prototypic light-water-reactor uranium dioxide fuel-pellet temperature profiles have been generated utilizing high flow rates (approximately 700 liters/min) of helium coolant gas, and a re-circulating system has been fabricated to permit tests of up to 1… more
Date: October 1976
Creator: Kennedy, C. R.; Yaggee, F. L.; Voglewede, J. C.; Kupperman, D. S.; Wrona, B. J.; Ellingson, W. A. et al.
Item Type: Refine your search to only Report
open access

Design of a Tunable High-Q Superconducting Notch Filter

Description: The design of a tunable high-Q superconducting notch filter is presented. The filter is designed to be manufactured from high Tc superconductors (Nb3S, Nb3Ge) made by high-rate magnetron sputtering on sapphire substrates. The geometry of the various elements, holder materials for the cryostat, studies relating to the preparation of suitable high Tc materials, and the photo-etching procedures for the filter elements are discussed.
Date: October 1978
Creator: Falco, Charles M.; Kampwirth, R. T.; Pang, C. S. & Schuller, Ivan K.
Item Type: Refine your search to only Report
open access

Environmental Pollutants and the Urban Economy : Phase 1. Final Report, June 1972-October 1975

Description: Costs and benefits of various urban air pollution control policies have been examined in Phase 1 of the Environmental Pollutants and the Urban Economy study being conducted jointly by Argonne National Laboratory and the University of Chicago. The need for sound economic evaluation of air quality regulations is evidenced by the resistance of many industries to pollution control policies based solely on the technical feasibility of achieving public health-related standards. For many firms that em… more
Date: October 1976
Creator: Argonne National Laboratory
Item Type: Refine your search to only Report
open access

Fission-Product Releases to the Primary System of EBR-II, January 1974-March 1975

Description: Seven releases of fission products occurred in EBR-II from January 1974 to March 1975 - - five from mixed-oxide elements and two from sodium-bonded driver-fuel elements. Four releases were from elements that contained a xenon tag, which aided considerably in locating three of the elements; data from the fourth element allowed estimation of changes of tag composition with reactor exposure. Rapid release of fission from two breached mixed-oxide elements caused the reactor to trip because of incre… more
Date: October 1976
Creator: So, B. Y. C.; Lambert, J. D. B.; Johnson, D. L.; Ebersole, E. R. & Brunson, G. S.
Item Type: Refine your search to only Report
open access

FX2-TH : A Two-Dimensional Nuclear Reactor Kinetics Code with Thermal-Hydraulic Feedback

Description: FX2-TH is a two-dimensional, time-dependent nuclear reactor kinetics program with thermal and hydraulic feedback. The neutronics model used is multi-group neutron diffusion theory. The following geometry options are available: x, r, x-y, r-z, theta-r, and triangular. FX2-TH contains two basic thermal and hydraulic models: a simple adiabatic fuel temperature calculation, and a more detailed model consisting of an explicit representation of a fuel pin, gap, clad, and coolant. FX2-TH allows feedba… more
Date: October 1978
Creator: Shober, R. A.; Daly, T. A. & Ferguson, D. R.
Item Type: Refine your search to only Report
open access

Laser Microsampling Method for Determination of Retained Fission Gas in Irradiated Nuclear Fuels

Description: A small ruby laser adapted to fire through a microscope is used to release fission gases from specific sites on a plane surface of an irradiated fuel specimen. Interaction of the focused laser pulse with the specimen surface results in a conical crater from which sampled material has been vaporized; the crater is surrounded by a heat-affected zone in which intergranular fracture and grain separation allow release of grain-boundary gases. Procedures for measuring the amount of krypton-85 release… more
Date: October 1979
Creator: Graczyk, D. G.; Bandyopadhyay, G.; Gehl, S. M.; Hughes, J. P. & Goodspeed, H. T.
Item Type: Refine your search to only Report
open access

LIMBO Computer Code for Analyzing Coolant-Voiding Dynamics in LMFBR Safety Tests

Description: The LIMBO (liquid metal boiling) code for the analysis of two-phase flow phenomena in an LMFBR reactor coolant channel is presented. The code uses a non-equilibrium, annular, two-phase flow model, which allows for slip between the phases. Furthermore, the model is intended to be valid for both quasi-steady boiling and rapid coolant voiding of the channel. The code was developed primarily for the prediction of, and the posttest analysis of, coolant-voiding behavior in the SLSF P-series in-pile s… more
Date: October 1979
Creator: Bordner, G. L.
Item Type: Refine your search to only Report
open access

Mechanical Properties Test Program on Structural Materials in a Sodium Environment

Description: This document describes in detail the ongoing and planned US Test program on the mechanical properties of sodium-exposed Type 316 austenitic stainless and Fe-2 1/4 Cr-1 Mo ferritic steels. The test program is based on the Development Requirement Specifications (DRS) established by the DOE/Clinch River Breeder Reactor Project (CRBRP) Program Office, the general need for the development of LMFBR structural-design criteria established by the Nuclear Systems Materials Handbook, and the need for a f… more
Date: October 1979
Creator: Natesan, K.; Chopra, O. K. & Kassner, T. F.
Item Type: Refine your search to only Report
open access

Numerical Method for Solution of Transient, Homogeneous, Equilibrium, Two-Phase Flows in One Space Dimension

Description: This report presents a solution method for transient, homogeneous, equilibrium, two-phase flows of a single-component fluid in one space dimension. The method combines a direct finite-difference procedure and the method of characteristics. The finite-difference procedure solves the interior points of the computing domain; the boundary information is provided by a separate procedure based on the characteristics theory. The solution procedure for boundary points requires information in addition t… more
Date: October 1979
Creator: Shin, Yong W. & Wiedermann, Arne H.
Item Type: Refine your search to only Report
open access

One-Dimensional Drift-Flux Model and Constitutive Equations for Relative Motion Between Phases in Various Two-Phase Flow Regimes

Description: In view of the practical importance of the drift-flux model for two-phase flow analysis in general and in the analysis of nuclear-reactor transients and accidents in particular, the kinematic constitutive equation for the drift velocity has been studied for various two-phase flow regimes. The constitutive equation that specifies the relative motion between phases in the drift-flux model has been derived by taking into account the interfacial geometry, the body-force field, shear stresses, and t… more
Date: October 1977
Creator: Ishii, M.
Item Type: Refine your search to only Report
open access

Plane-Strain Stress Intensity Factors for Cracked Hexagonal Subassembly Ducts

Description: Plane-strain stress intensity factors for a pressurized hexagonal subassembly duct with a crack in a corner or midflat are presented in convenient graphical form for representative LMFBR hexcan dimensions. Corner-crack calibrations based on several different models of the round hexcan corner are determined first in order to bound the stress intensity factor. A subsequent finite-element analysis of a uniformly pressurized hexcan with a corner crack gives accurate data for the stress intensity fa… more
Date: October 1977
Creator: Petroski, H. J.; Glazik, J. L. & Achenbach, J. D.
Item Type: Refine your search to only Report
open access

Radiological and Environmental Research Division Annual Report: Part 1, Fundamental Molecular Physics, October 1977-September 1978

Description: Annual report of the Argonne National Laboratory Radiological and Environmental Research Division regarding activities related to molecular physics and chemistry. This report discusses a study on the physical properties and the chemical reactions of atmospheric constituents, with emphasis on the role of pollutants arising from the use of fossil fuels. Special effort is being placed on understanding nucleation phenomena through the study of the molecular properties of gas phase clusters.
Date: October 1977
Creator: Rowland, R. E.
Item Type: Refine your search to only Report
open access

A Survey of Numerical Methods for Hydraulic Transients

Description: The finite difference methods of Lax, Lax-Wendroff (two-step), donor cell type and finite-element method using Galerkin procedure with B-splines as approximating functions are compared with the method of characteristics for the solution of water-hammer transients as typified by valve closure problems. From the point of view of accuracy, the two-step Lax-Wendroff method and the method of characteristics are comparable and produce the best results. The Lax methods fair worst. The donor cell type … more
Date: October 1977
Creator: Leaf, G. K. & Chawla, T. C.
Item Type: Refine your search to only Report
open access

Three-Dimensional Thermal-Neutron Radiography

Description: Three-dimensional radiographic methods provide a means of determining the depth of defect indications and minimizing the confusion that results from overlapping images of structures at various depths in an object. One method of obtaining and displaying three-dimensional radiographic images is multiple-film laminagraphy, i.e., a series of radiographic films taken at different orientations can be viewed superimposed to present a sharply focused image of any desired object plane. Methods that use … more
Date: October 1976
Creator: Berger, H. & Reimann, K. J.
Item Type: Refine your search to only Report
open access

Unavailability Modeling and Analysis of Redundant Safety Systems

Description: Analytical expressions have been developed to estimate the average unavailability of an m-out-of-n (m/n, 1 less than or equal to m less than or equal to n less than or equal to 4) standby safety system of a nuclear power plant. The expressions take into account contributions made by testing, repair, equipment failure, human error, and different testing schemes. A computer code, ICARUS, has been written to incorporate these analytical equations. The code is capable of calculating the average una… more
Date: October 1979
Creator: Argonne National Laboratory. Reactor Analysis and Safety Division.
Item Type: Refine your search to only Report
Back to Top of Screen