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A PINHOLE CAMERA AUTORADIOGRAPHIC TECHNIQUE FOR ENCAPSULATED IRRADIATED FUEL SPECIMENS

Description: A gamma pinhole camera was devised to permit a nondestructive examination of irradiated specimens while still in sealed capsules. The camera was designed such that a complete experiment may be withdrawn from an irradiation facility, the specimen autoradiographed, and the experiment then reinserted if so desired. The pinhole aperture is 0.020 in., and the source to pinhole block is 4 ft. The image-to-source sizes are a one-to-one ratio. The resolution of the image is 0.03 in. (auth)
Date: April 1, 1962
Creator: Beck, W.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Theoretical characterization of a dual-purpose gamma thermometer for local power-generation measurement in an LMFBR

Description: A preliminary analytical and computational study was performed to investigate the potential of a modified gamma thermometer (GT) as both a local power level monitor and a sodium flow blockage monitor for a Liquid Metal Fast Breeder Reactor. This study consisted of two fundamental parts: a radiation field characterization and a thermal-hydraulic analysis. The radiation transport analysis was performed to determine the volumetric heat source within the GT resulting from gamma and neutron heating.… more
Date: April 1, 1982
Creator: Johnson, J. O. & Burns, T. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Xenon Gamma Detector Project Support

Description: This project provided funding of $48,500 for part of one year to support the development of compressed xenon spectrometers at BNL. This report describes upgrades that were made to the existing detector system electronics during that period, as well as subsequent testing with check sources and Special Nuclear Materials. Previous testing of the equipment extended only up to the energy of 1.3 MeV, and did not include a spectrum of Pu-239. The new electronics allowed one-button activation of the hi… more
Date: April 1, 2008
Creator: Vanier, P. E. & Forman, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Results from the E-705 electromagnetic shower position detector

Description: A fine grain hodoscope to measure the position of showers in the outer (/vert bar/X/vert bar/ > 52cm) region of the E-705 electromagnetic calorimeter is described. The hodoscope is constructed with two layers of vertical conducting plastic tubes for the X position measurement of showers. Y position measurement of showers was accomplished by cathode induced horizontal strips. A 50/50 argon, ethane bubbled though isopropyl alcohol at 0/degree/C gas mixture was circulated through the tubes in para… more
Date: April 1, 1989
Creator: Jenkins, C. M.; Arenton, M.; Chen, T. Y.; Conetti, S.; Cox, B.; Delchamps, S. W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Spent-fuel cooling curve for safeguard applications of gross-gamma measurements

Description: Gross-gamma detectors can be used to gather data from spent-fuel assemblies in a simple and rapid manner. Using these data, inspectors can generate a power-law curve to check the consistency of the declared values with the measured values; points outside the curve indicate erroneously declared values or removal of material. Simple types of erroneously declared values can be detected immediately, whereas subtle types may require a second measurement and more subtle types may escape detection. If… more
Date: April 1, 1983
Creator: Rinard, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Annual environmental monitoring report of the Lawrence Berkeley Laboratory, 1986

Description: The Environmental Monitoring Program of the Lawrence Berkeley Laboratory is described. Data for 1986 are presented and general trends are discussed. Topics include radiation monitoring, wastewater discharge monitoring, dose distribution estimates, and ground water monitoring. 9 refs., 8 figs., 20 tabs.
Date: April 1, 1987
Creator: Schleimer, G.E. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Surface and subsurface characterization of uranium contamination at the Fernald environmental management site

Description: The past operations of uranium production and support facilities at several Department of Energy (DOE) sites have occasionally resulted in the local contamination of some surface and subsurface soils, and the three-dimensional distribution of the uranium at these sites must be thoroughly characterized before any effective remedial protocols can be established. To this end, Pacific Northwest Laboratory (PNL) has been tasked by the DOE`s Office of Technology Development with adapting, developing,… more
Date: April 1, 1993
Creator: Schilk, A. J.; Perkins, R. W.; Abel, K. H. & Brodzinski, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Environmental monitoring at the Lawrence Livermore National Laboratory: Annual report, 1987

Description: This report documents the results of the Environmental Monitoring Program at the Lawrence Livermore Laboratory (LLNL) for 1987. To evaluate the effect of LLNL operations on the local environment, measurements were made of direct radiation and a variety of radionuclides and chemical pollutants in ambient air, soil, sewage effluents, surface water, groundwater, vegetation, foodstuff, and milk at both the Livermore site and nearby Site 300. Evaluations were made of LLNL's compliance with the appli… more
Date: April 1, 1988
Creator: Holland, R. C. & Brekke, D. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Inline Monitors for Measuring Cs-137 in the SRS Caustic Side Solvent Extraction Process

Description: The Department of Energy (DOE) selected Caustic-Side Solvent Extraction (CSSX) as the preferred technology for the removal of radioactive cesium from High-Level Waste (HLW) at the Savannah River Site (SRS). Before the full-scale Salt Waste Processing Facility (SWPF) becomes operational, a portion of dissolved saltcake waste will be processed through a Modular CSSX Unit (MCU). The MCU employs the CSSX process, a continuous process that uses a novel solvent to extract cesium from waste and concen… more
Date: April 24, 2006
Creator: Casella, V
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Gross Gamma Dose Rate Measurements for TRIGA Spent Nuclear Fuel Burnup Validation

Description: Gross gamma-ray dose rates from six spent TRIGA fuel elements were measured and compared to calculated values as a means to validate the reported element burnups. A newly installed and functional gamma-ray detection subsystem of the In-Cell Examination System was used to perform the measurements and is described in some detail. The analytical methodology used to calculate the corresponding dose rates is presented along with the calculated values. Comparison of the measured and calculated dose r… more
Date: April 1, 2001
Creator: Winston, Philip Lon & Sterbentz, James William
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proposed Emulsion Experiment Search for Short Lived Particles at High Energies

Description: It is proposed to conduct an experiment at the National Accelerator Laboratory concerned with the search for new particles having lifetimes between 10{sup -17} and 10{sup -12} second. The experiment will be conducted with an emulsion chamber arranqement and will explore for particles with lifetimes too short to be observed directly with other instruments. Two sidelines of the experiment will be concerned with an improved measurement of the lifetime of the neutral pion and the search for gamma r… more
Date: April 19, 1972
Creator: Kotzer, Peter; Lord, J.J. & U., /Washinton
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A space crystal diffraction telescope for the energy range of nuclear transitions

Description: This paper contains literature from American Power Conference Air Toxics Being Measured Accurately, Controlled Effectively NO{sub x} and SO{sub 2} Emissions Reduced; Surface Condensers Improve Heat Rate; Usable Fuel from Municipal Solid Waste; Cofiring Technology Reduces Gas Turbine Emissions; Trainable, Rugged Microsensor Identifies of Gases; High-Tc Superconductors Fabricated; High-Temperature Superconducting Current Leads; Vitrification of Low-Level Radioactive and Mixed Wastes; Characteriza… more
Date: April 1, 1995
Creator: von Ballmoos, P.; Naya, J.E.; Albernhe, F.; Vedrenne, G.; Smither, R.K.; Faiz, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photon-photon colliders

Description: Since the seminal work by Ginsburg, et at., the subject of giving the Next Linear Collider photon-photon capability, as well as electron-positron capability, has drawn much attention. A 1990 article by V.I. Teinov describes the situation at that time. In March 1994, the first workshop on this subject was held. This report briefly reviews the physics that can be achieved through the photon-photon channel and then focuses on the means of achieving such a collider. Also reviewed is the spectrum of… more
Date: April 1, 1995
Creator: Sessler, Andrew M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Feasibility of nondestructive assay measurements in uranium enrichment plants

Description: Applications of nondestructive assay methods to measurement problems in uranium enrichment facilities are reviewed. The results of a number of test and evaluation projects that were performed over the last decade at ORGDP and Portsmouth are presented. Measurements of the residual holdup in the top enrichment portion of the shut-down K-25 cascade were made with portable neutron and gamma-ray detectors, and inventory estimates based on these data were in good agreement with ORGDP estimates. In th… more
Date: April 1, 1978
Creator: Walton, R.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiochemical Studies of Neutron Deficient Actinide Isotopes

Description: The production of neutron deficient actinide isotopes in heavy ion reactions was studied using alpha, gamma, x-ray, and spontaneous fission detection systems. A new isotope of berkelium, /sup 242/Bk, was produced with a cross-section of approximately 10 ..mu..b in reactions of boron on uranium and nitrogen on thorium. It decays by electron capture with a half-life of 7.0 +- 1.3 minutes. The alpha-branching ratio for this isotope is less than 1% and the spontaneous fission ratio is less than 0.0… more
Date: April 1, 1978
Creator: Williams, K. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Final report: Development Test No. 105-609-A: Slug rupture detection experiments at 105-C

Description: This report details the evaluation of the prototype Gamma Monitor system which demonstrated more sensitivity for rupture detection than the C Beta Monitor in agreement with earlier tests at H pile. In one instance a rupture was indicated several hours earlier by the experimental gamma installation.
Date: April 16, 1956
Creator: Paul, R. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Employing Thin HPGe Detectors for Gamma-Ray Imaging

Description: We have evaluated a collimator-less gamma-ray imaging system, which is based on thin layers of double-sided strip HPGe detectors. The position of individual gamma-ray interactions will be deduced by the strip addresses and the Ge layers which fired. Therefore, high bandwidth pulse processing is not required as in thick Ge detectors. While the drawback of such a device is the increased number of electronics channels to be read out and processed, there are several advantages, which are particular… more
Date: April 15, 2002
Creator: Vetter, K; Mihailescu, L; Ziock, K; Burks, M; Hull, E; Madden, N et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Coplanar-grid detector with single-electrode readout

Description: The coplanar-grid technique provides substantial spectral performance improvement over that of conventional detector designs and electronics when applied to gamma-ray detectors based on compound semiconductors. The technique realizes this improvement by measuring the difference between the induced charge signals from two interdigitated coplanar-grid electrodes. By adjusting the relative gain between the two grid signals prior to subtraction, the difference signal can be made less sensitive to t… more
Date: April 1, 1997
Creator: Amman, M. & Luke, P. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Purification, Growth, Fabrication and Characterization of Wide Bandgap Materials for Gamma-Ray Detectors

Description: The objective of this project was to improve the performance and the fabrication of cadmium zinc telluride room temperature gamma ray detetors This paper outlines the necessity for controlled surface preparation and deposition of ohmic contacts.
Date: April 30, 1999
Creator: Burger, Arnold
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiometric measurements on the fabrication of non-destructive assay standards for WIPP-Performance Demonstration Program

Description: The Inorganic Elemental Analysis Group of LANL has prepared several different sets of working reference materials (WRMs). These WRMs are prepared by blending quantities of nuclear materials (plutonium, americium, and enriched uranium) with diatomaceous earth. The blends are encapsulated in stainless steel cylinders. These WRMs are being measured as blind controls in neutron and gamma based non-destructive assay (NDA) instruments. Radiometric measurements on the blending homogeneity and verifica… more
Date: April 1, 1997
Creator: Wong, A. S. & Marshall, R. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cadmium zinc telluride spectral modeling

Description: Cadmium Zinc Telluride (CZT) detectors are the highest resolution room-temperature gamma ray detectors available for isotopic analysis. As with germanium detectors, accurate isotopic analysis using the spectra requires peak deconvolution. The CZT peak shapes are asymmetric, with a long low energy tail. The asymmetry is a result of the physics of the electron/hole transport in the semiconductor. An accurate model of the physics of the electron/hole transport through an electric field will allow … more
Date: April 1, 1998
Creator: Dardenne, Y. X., LLNL
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ARIES segmented gamma-ray scanner user manual

Description: The segmented gamma-ray scatter (SGS) designated as Win{_}SGS at the Los Alamos Plutonium Facility has been installed and is intended for use in quantifying the radioisotope content of DOE-STD-3013-96 equivalent containers. The SGS features new software written in C and a new user interface that runs under Microsoft Windows{trademark}. The operation of the ARIES Segmented Gamma-ray Scanner is documented in this manual. It covers user instructions as well as hardware and software details. Additi… more
Date: April 16, 1998
Creator: Biddle, R. S.; Sheppard, G. A. & Schneider, C. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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