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Evaluation of Subsize Izod Specimen Designs for Determining the Notch Toughness of Zircaloy-2

Description: Correlations were made on Zircaloy-2 Izod impact data and Charpy-V drop- weight data. Subsize Izod impact specimens of various geometries and notch configurations and standard ASTM Charpy-V specimens were prepared from bar and plate stock and tested. Drop-weight tests were also conducted and the NDT (nil- ductility transition) temperature was determined for 1/2 in. Zircaloy-2 plate. Results show that the impact properties of Zircaloy-2 are sensitive to hydrogen concentration, specimen and notch… more
Date: October 1, 1962
Creator: Prislinger, J. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Delayed Failure Hydrogen Embrittlement of Zirconium. Quarterly Report No. 2, December 15, 1961 to March 14, 1962

Description: The purpose of this investigation is to determine the extent to which Zr and Zr alloys exhibit delayed failure (static fatigune) as caused by a combination of absorbed H and applied stress. Both notched and unnotched specimens of unalloyed Zr and Zircaloy-2 were hydrogenated to 200 ppm and 500 ppm by means of a modified Sieverts apparatus; specimens were evaluated at room temperature. Thus far, no time-dependent fracture was observed which can be attributed to the delayed failure phenomenon; it… more
Date: March 30, 1962
Creator: Weinstein, D. & Holtz, F. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Simulation of the EGCR Steam Generator

Description: An analog model of the EGCR steam generator was developed and operated on the ORNL analog computer as part of a program to simulate the operation and control of the EGCR reactor plant. Equilibrium operation and the transient response of the steam generator unit to system perturbations were studied. A simultaneous solution of the basic heat transfer equations representing the performance of the unit was obtained. The model was operated initially at steady- state conditions, and then perturbation… more
Date: October 1, 1961
Creator: Yarosh, M.M. & Ball, S.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

CURRENT STATUS OF THE AC IONIZATION CHAMBER

Description: ABS>The design concept of an a-c ionization chamber and its supporting electronics is described. Several designs are possible and the sensors can be tailored to specific requirements when necessary. Mode of operation, signal voltage development, and switching frequency are discussed. High-sensitivity operation is described. Requirements for high-temperature, power-level operation are outlined. (M.C.G.)
Date: July 1, 1961
Creator: Rusch, G.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

THEORETICAL STUDY OF OPTICAL PROPERTIES. PHOTON ABSORPTION COEFFICIENTS, OPACITIES, AND EQUATIONS OF STATE OF LIGHT ELEMENTS INCLUDING THE EFFECT OF LINES. Final Report. APPENDIX A: THERMODYNAMIC PROPERTIES AND MEAN OPACITIES

Description: Photon absorption coefficients and mean opacities were calculated for hydrogen, beryllium, carbon, nitrogen, aluminum, and silicon over a temperature range froni l.5 to 34 ev and a density range from about l0/sup -1/g/cm/sup 3/ downward. Contributions to the absorption coefficient from free-free (inverse- bremsstrahlung), bound-free (photoelectric), and bound-bound (line-absorption) processes are included, as is Compton scattering. Certain thermodynamic properties are also given. An improved re… more
Date: September 1, 1961
Creator: Stewart, J.C. & Pyatt, K.D. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

THE IMPACT PROPERTIES OF UNALLOYED PLUTONIUM

Description: The effect of temperature on the unnotched and notched Charpy impact properties of plutonium was studied in the alpha, beta, gamma, and delta phases encompassing a temperature range of -43 to 330 deg C. Impact energies for unnotched specimens generally increased with increasing test temperature in the alpha and beta phases. Brittle failures were obtained in these phases. The specimen tested in the gamma phase did not fracture but bcnt in ofi U-shape and pulled through the anvil. lmpact energies… more
Date: October 1, 1961
Creator: Gardner, H.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Surface Ionization Method of Detecting Halogen-Bearing Gases

Description: In an experimental investigation of positive ion production at heated surfaces, the primary objective was to develop a stable quantitative detector suitable for studies of movements of a gaseous tracer in the atmosphere or other large gaseous masses. Freon-12 (dichlorodifluoromethane) is well qualified as a tracer, srnce it is harmless to animals, plants, and equipment under ordinary conditions, is undetectable, except by special apparatus, and is not too expensive, considering that 0.1 ppm may… more
Date: July 1, 1962
Creator: Schultz, H.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

BIO-ORGANIC CHEMISTRY QUARTERLY REPORT DEC. 1960 THROUGH FEB.1961

Description: The current interest in the subject of fiber optics has brought about, among its many achievements, the development of a new technique for measuring refractive index. An instrument designed as a light-pipe refractometer or rod photorefractometer has been described by Kapany and Pike. these authors have presented both a theoretical study of the phenomenon and experimental results arising from a prototype apparatus. The range of applicability of such a device is limited, however, by the availabil… more
Date: April 1, 1961
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dynamic Calibration Study

Description: Since transducers used in rocket engine applications measure time varying quantities, the characteristics which define the behavior of a transducer under dynamic conditions are extremely important in their applications by the design engineer. Proper calibration of transducers in the dynamic or frequency domain required a thorough understanding of the dynamic or frequency domain required a thorough understanding of the dynamic characteristics of a transducer. Analytical models are generated in h… more
Date: October 23, 1963
Creator: Copen, W.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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