Search Results

open access

Summary of the 2018 White House Summit on Artificial Intelligence for American Industry

Description: This report summarizes the 2018 White House Summit on Artificial Intelligence for American Industry, where over 100 senior government officials, technical experts from top academic institutions, head of industrial research labs and American business leaders who are adopting AI technologies to benefit their customers, workers, and shareholders converged.
Date: May 10, 2018
Creator: United States. Office of Science and Technology Policy.
Partner: UNT Libraries Government Documents Department
open access

Radiation Damage to Vacuum Chamber Walls

Description: "The problem of radiation derange to the walls of two types of vacuum chamber for the 6 Bev Cambridge Electron Accelerator was studied. Radiation damage may arise from the synchrotron radiation and from electrons which are not accepted at injection. The synchrotron radiation produces a large amount of secondary x radiation which is isotropic, and therefore complicates the arrangement of internal shielding. The 20 Mev electrons from the lines cannot be attenuated by shielding. It is concluded th… more
Date: September 10, 1957
Creator: Stearns, Brenton
Partner: UNT Libraries Government Documents Department
open access

Periodic Radiation Survey. Section II. 4182-EFPH. Second Performance. Core I, Seed 1. Test Results DL-S-231 (T-612394)

Description: The purpose of the survey was to determine the radiation level in the Turbine Generator Services Building, around the Fuel Handling Canal, in the limited access areas of the reactor plant containers and on the boiler container roofs during plant operation. The test was performed with the plant at approximately 100 per cent power with three loops (1A, 1B, and 1C) in service. The radiation levels of the areas surveyed with a few exceptions were essentially background (.03 MR/HR). These exceptions… more
Date: November 10, 1959
Creator: Ritz, William C.
Partner: UNT Libraries Government Documents Department
open access

Radial Vibrations in Short, Hollow Cylinders of Barium Titanate

Description: The mathematics has been developed for the determination of the radial coupling coefficient for a hollow cylinder of electro-strictive material whose length is small compared to its outside diameter.
Date: December 10, 1954
Creator: Stephenson , C. V.
Partner: UNT Libraries Government Documents Department
open access

A Human Engineering Guide to the Arrangement of Elements on a Control Panel

Description: This memorandum is a compilation of general information concerned with the arrangement of elements on a control panel. Arrangement considerations that lead to to improved ease and accuracy of operation are presented to assist the engineer in designing new control panels.
Date: December 10, 1954
Creator: Williams, H. L.
Partner: UNT Libraries Government Documents Department
open access

Frequency Components of a Step Function and a Sinusoid

Description: Fourier analyses are made on two functions. The first is a step function forward from periodic samples of a sinusoid. If the frequency of the sinusoid is less than one-half of the sampling frequency, it is shown that the step function has no frequency components less than one-half of the sampling frequency other than that of phase, and duration with respect to the interval of the analysis. It is shown that the insertion of a blank space in the period of analysis reduces greatly the uncertainty … more
Date: May 10, 1955
Creator: McGehee, R. M.
Partner: UNT Libraries Government Documents Department
open access

Plasma Accumulation in a Device Fed by Energetic Ion Trapping

Description: Simon (1960) has given a general steady state theory of plasma accumulation (without energy losses) in an OGRA device. Such a device is fed by injection of energetic molecular ions which dissociate to produce trapped protons. Initial trapping is achieved by dissociation in the background gas. Such a device is usually characterized by a critical input current of critical plasma density (a function of input current) above which plasma density builds up to a value limited by Coulomb-scattering los… more
Date: November 10, 1960
Creator: Mackin, R. J., Jr.
Partner: UNT Libraries Government Documents Department
open access

Plutonium Release Incident at Oak Ridge National Laboratory

Description: A nonnuclear explosion involving an evaporator occurred in a shielded cell in the Radiochemical Processing Pilot plant at Oak Ridge National Laboratory. Plutonium released from the processing cell contaminated areas in the pilot plant building and nearby streets and building surfaces. The explosion is considered the result of rapid reaction of nitrated organic compounds formed by the inadvertent nitration of about 14 liters of a proprietary decontaminating reagent.
Date: January 10, 1961
Creator: King, L. J. & Bresee. J. C.
Partner: UNT Libraries Government Documents Department
open access

Determination of Li6 in Aqueous Solution by Neutron Activation Analysis

Description: A method for determining the concentration of Li6 in aqueous solution has been tested using the nuclear reactions Li6 (n,α)H3 and O16 (H3,n)F18. Annihilation 7 radiation of induced 1.87 hour F18 radioactivity was counted with a well-type scintillation counter, and the radioactivity per millimole of lithium was found to be independent of lithium concentration below about 0.2moles/liter. The sensitivity limit for detecting lithium is less than 0.1 micromole (0.0075 micromole Li6).
Date: July 10, 1959
Creator: Winchester, J. W. & Bate, L. C.
Partner: UNT Libraries Government Documents Department
open access

Solids Accumulation and Fission Heating in the HRT Chemical Plant Underflow Pot (Co-op Report, Fall Quarter, 1958)

Description: The purpose of this study was to develop equations for calculating fision product heating in the HRT-CP underflow pot from measured temperatures and to attempt to correlate the rat of solids accumulation in the underflow pot with fission heating and reactor power. Using fission heating data calculated from relating solids accumulation and heating have been tested. In one case an error of no greater than 26% was incurred in the calculation of the total weight of solids collected during chemical … more
Date: June 10, 1959
Creator: Dunn, W. E.
Partner: UNT Libraries Government Documents Department
open access

Nuclear Computations for HRE-3 Design : Equilibrium Results

Description: Various nuclear characteristics of two-region spherical homogeneous reactors have been computed in order to provide information for the design of HRE-3. Equilibrium isotope concentrations were established using an ORACLE code, and a two-group model was used to obtain critical concentrations and flux distributions. Breeding ratio is plotted as a function of reactor size, blanket thorium concentration, and other design and operating parameters, and the time required for a demonstration breeding i… more
Date: July 10, 1957
Creator: Rosenthal, M. W. & Fowler, T. B.
Partner: UNT Libraries Government Documents Department
open access

Effect of Slurry Physical Properties on Heat Exchangers and Pump Characteristics

Description: Design calculations were made for a system consisting of a pump, one hundred feet of pipe, and a heat exchanger to remove 1 Mw of heat from various aqueous thorium oxide slurries. The rheological properties of the slurries were varied over a range of yield stresses from 0 to 1.5 lb/sq ft and of coefficients of rigidity from 1/2 to 2 centipoise. Two different cases were studied: a heat exchanger having fixed axial and radial delta T in which the tube length was allowed to vary and a heat exchang… more
Date: June 10, 1957
Creator: Thomas, D. G.
Partner: UNT Libraries Government Documents Department
open access

Thorium oxide Slurry Falling Ball Viscometer : Final Co-op Report, Winter, 1957

Description: A falling ball viscometer under development at ORNL, employing a flow system and an electromagnetically operated dash-pot pump, was evaluated for possible use with aqueous ThO2 slurry systems under reactor irradiation. Interchangeable check valve inserts were designed and fabricated to investigate several pump designs. Magnetic flux concentrations which originally prevented circulation of the ferritic stainless steel viscometer ball through the electromagnetic pump were eliminated by substituti… more
Date: April 10, 1957
Creator: Novak, P. E.
Partner: UNT Libraries Government Documents Department
open access

Delay Time Prior to Dumping the HRT

Description: Some refined calculations have been made, relative to a proposed delay prior to a dump, to determine the expected D2 concentration in the vent stream from the pressurizer gas bleeds during a dump of the Homogeneous Reactor Test (HRT). These calculations indicate that for vent valves have a Cv of 0.07 (venting time from 2000 psia to D2O saturation pressure of approximately 12 minutes), a delay period is not required since the D2 concentration is well below lower explosive limit. For vent valves … more
Date: January 10, 1957
Creator: Gift, E. H. & McLain, Howard A.
Partner: UNT Libraries Government Documents Department
open access

Fuel Cycle Program, A Boiling Water Reactor Research and Development Program Eighth Quarterly Progress Report April 1962 - June 1962

Description: The Fuel Cycle Program is an integrated program of investigation in the Vallecitos Boiling Water Reactor (VBWR) and other facilities to improve the technological limits of boiling water reactors in several areas. This report presents updates on tasks related to those areas.
Date: July 10, 1962
Creator: Hodde, J. A.
Partner: UNT Libraries Government Documents Department
open access

VARI-II

Description: Writing the VARI-II Program was motivated by the need for a method of analyzing the results for the Absorber Burn-Up Experiment in progress at the Vallecitos Atomic Laboratory.
Date: March 10, 1961
Creator: Russell, J. L. (John L.), Jr.
Partner: UNT Libraries Government Documents Department
open access

Leaching and Precipitation Tests on Grants Ores

Description: Leaching tests were run on two samples from the Grants area in New Mexico. Uranium extractions of 94 per cent were obtained by leaching Sample 6-1 with solutions containing 240 lbs. of Na2CO3 and 60 lbs. of NaHCO3 per ton and by leaching Sample 6-2 with 270 lbs. of Na2CO3 and 180 lbs. of NaHCO3 per ton. Cyclic tests were completed using caustic precipitation of the leach liquor.
Date: September 10, 1951
Creator: Abrams, Charles S. & George, D'Arcy R.
Partner: UNT Libraries Government Documents Department
open access

[Change in Recommended Schools for Annenberg Arts Partner Schools]

Description: A comprehensive document shedding light on the intricacies of the change in recommended schools. Accompanied by an attached document outlining the revised recommendations for Annenberg Arts Partner Schools, this detailed report provides insights into the considerations, rationale, and strategic adjustments made in the selection process.
Date: February 10, 1997
Partner: UNT Libraries Special Collections
open access

Operation of the ORNL Graphite Reactor and the Low-Intensity Test Reactor — 1955 LITR Flux Traverses

Description: The ORNL Graphite Reactor operated very well during 1955. The downtime was low, only 8.6%. The fuel in the bonded slugs did not perform as well in 1955 as in 1954. Much of the trouble was undoubtedly due to growth of slugs which were not beta-transformed. It is known that some slugs had grown over 1/2 in. The automatic central system installed in 1954 continued to operate satisfactorily. The cooling system gave minor trouble when one of the 900-hp fan meters had to be replaced because of shorts… more
Date: September 10, 1956
Creator: Rupp, A. F. & Cox, J. A.
Partner: UNT Libraries Government Documents Department
open access

Homogeneous Reactor Project Quarterly Progress Report for Period Ending July 31, 1955

Description: Construction of the HRT reactor shield tank was completed, and the inside surfaces were painted. The roof structure for the tank is being assembled in preparation for an acceptance pressure test. Service piping and instrument lines are being installed in the central room area by ORNL craft forces. This work is approximately 50% complete. Fabrication of all temperature system components, except the blanket outer storage tanks, has been completed.
Date: October 10, 1955
Creator: McDuffie, H. F. & Kelly, D. C.
Partner: UNT Libraries Government Documents Department
open access

A Fused Salt—Fluoride Volatility Process for Recovery and Decontamination of Uranium

Description: A preliminary chemical flowsheet is presented of a fluoride volatility process for recovering and decontaminating uranium from heterogeneous reactor fuels after dissolution in a fused salt. In laboratory work, a gross β decontamination factor of > 10 4 was obtained in the fluorination of a UF4-NaF-ZrF4 melt by passing the product UF6 through NaF at 650°C. The solubility of UF6 in molten NaF-ZrF4 was shown in kinetic studies to cause a lag in the evolution of UF6 from the fluorinator. Corrosion … more
Date: October 10, 1955
Creator: Cathers, G. I. & Bennett, M. R.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen