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Adaptation of jet accumulation techniques for enhanced rock cutting

Description: The velocity of water jet flow can be increased when the jet impacts a target material or another water jet. A theory describing such augmentation in terms of velocity, mass, and energy change is considered. The phenomena is sensitive to jet structure and the jet velocity profile. Jet velocity profiles do not remain constant over great distances from the nozzle, and ultimately disrupt into droplets. Within the droplet the profile is more regular and the velocity constant. The theory is extended… more
Date: October 26, 1977
Creator: Mazurkiewicz, M.; Barker, C.R. & Summers, D.A.
Item Type: Refine your search to only Report
open access

Advanced Gas Cooled Nuclear Reactor Materials Evaluation and Development Program. Progress report, January 1, 1978--March 31, 1978

Description: The activities associated with the procurement of the materials for the screening test program, information from vendor certification for the materials received, and preliminary information from the materials characterization tests performed by GE are reported. The construction status of the simulated reactor helium supply system, testing equipment, and gas chemistry analysis instrumentation and equipment are discussed. The final recommended impurity levels for the screening phase helium are pr… more
Date: June 26, 1978
Item Type: Refine your search to only Report
open access

Analysis of a flow metering device for low-quality steam-water flows. Final report

Description: The goal of this project is to investigate the potential of the meter configuration consisting of a sharp-edged contraction section followed by an extended length of constant area duct and finally a diffuser section for pressure recovery. This and two other configurations were tested. These configurations and the reasons underlying their selection are described and discussed. It is concluded that Murdock's correlation for steam/water flow through orifices and sudden contraction sections at low … more
Date: June 26, 1979
Creator: Crowe, C.T.
Item Type: Refine your search to only Report
open access

Analytic technique for router comparison

Description: A model for printed circuit boards which can be used to predict the probability that a router will successfully make a connection is presented. The model reflects certain characteristics of the circuit board that is being routed and the model incrementally changes as the board is routed. Routing procedures typically have certain parameters which influence selection of the set of paths that are explored, and determine the order of exploration. These parameters obviously influence the probability… more
Date: November 26, 1975
Creator: Wilson, D. C. & Smith, R. J., II
Item Type: Refine your search to only Article
open access

Annual environmental monitoring report: calendar year 1975. [Mound Laboratory, Ohio]

Description: The local environment surrounding Mound Laboratory was monitored for tritium and plutonium-238 released by Mound Laboratory. The results are reported for calendar year 1975. The environmental parameters analyzed included air, water, foodstuffs, soil, and silt. For radioactive species, the average concentrations of plutonium-238 and tritium were within the stringent standards adopted by the U.S. Energy Research and Development Administration. Data concerning nonradioactive species in air and wat… more
Date: April 26, 1976
Creator: Farmer, Billy M.; Robinson, Bobby & Carfagno, Daniel G.
Item Type: Refine your search to only Report
open access

Calibration of energy dispersive x-ray spectrometers for analysis of thin environmental samples

Description: Four separate techniques for calibrating energy dispersive x-ray spectrometers are described. They include the use of (1) individual evaporated elemental thin-film standards, (2) nebulized multielement standard solution deposits to determine relative elemental sensitivity factors, (3) a semi-empirical approach to calculate relative elemental sensitivity factors, and (4) thick pure element disks. The first three techniques are applicable for a broad range of elements. The utilization of nebulize… more
Date: January 26, 1976
Creator: Giauque, R. D.; Garrett, R. B. & Goda, L. Y.
Item Type: Refine your search to only Article
open access

Characteristics of tungsten oxide collectors as a function of activation

Description: Addition of minute amounts of oxygen to a thermionic energy converter results in a significant performance improvement. The presence of oxygen reduces the collector work function and decreases the cesium pressure required to obtain a given current density from the emitter. In addition, oxygen additive diodes have the practical benefits of increased interelectrode spacing and improving converter power density and efficiency with polycrystalline electrodes. The motivation for the studies describe… more
Date: May 26, 1977
Creator: Balestra, C. L. & Wang, C.
Item Type: Refine your search to only Report
open access

Charge exchange losses during cyclotron acceleration: experiment and theory

Description: Quantitative estimates of charge exchange (CE) losses during acceleration are very important in the design and operation of heavy ion cyclotrons. Such estimates have been made using a vacuum model computer code which was developed to establish vacuum requirements for the MSU superconducting heavy ion cyclotron. This code uses pressure and cross-section data to calculate the radial loss of beam due to charge exchange. Since CE cross sections and radial pressure profiles are not always well known… more
Date: May 26, 1978
Creator: Gough, R.A. & Mallory, M.L.
Item Type: Refine your search to only Article
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