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STATISTICAL ANALYSIS AND MODELING OF GAP CONDUCTANCE DATA FOR REACTOR FUEL RODS CONTAINING UO2 PELLETS

Description: The purpose of this study was threefold: To examine a large body of in-reactor data for UO{sub 2} pellet fuel where internal temperatures have been measured, and to estimate fuel surface temperature, cladding inner temperature, and thus gap conductance under a consistent set of assumptions. To estimate the variance (due to experimental uncertainties) in the inferred gap conductance values. To attempt a correlation of the gap conductance values with design parameters and operating conditions (e.g., with cold diametral gap and local linear power).
Date: May 1, 1974
Creator: Lanning, D. D.; Hann, C. R. & Gilbert, E. S.
Partner: UNT Libraries Government Documents Department

Pacific Northwest Laboratory Monthly Activities Report, Division of Production and Materials Management and Hanford Plant Assistance Programs: March 1974

Description: Tasks are reported that were done in assistance to the Atlantic Richfield Hanford Company in the area of process technology and development, and in assistance to the Hanford Plant in the areas of environmental evaluations, radiation protection, and radiation standards and engineering.
Date: April 1, 1974
Creator: Alpen, E. L.
Partner: UNT Libraries Government Documents Department

Effect of radiation on proteins and radiation effects in biochemistry and organic chemistry. Final report, October 15, 1957--October 14, 1974

Description: A summary is made of a fifteen year study of chemical effects of radiation of amino acids and proteins. Included is a list of publications: 54 papers, reports and abstracts, and 10 M.S. and Ph.D theses. The report concludes with details of the final two studies done under this contract. These are, first, a study of post-irradiation effects of various gases on gamma irradiated lysozyme. This study showed that H$sub 2$S, O$sub 2$, NO, and N$sub 2$O treatment changed the amount of aggregation products, and also that a certain amount of the irradiated lysozyme was subject to main chain cleavage. The second was a study of proteins in rabbit eye lens cataracts induced by x-irradiation or a high galactose diet. The cataract proteins were more soluble in water than normal proteins, and were present in lower amounts in the eye lens. (auth)
Date: January 1, 1974
Creator: Tolbert, B.M.
Partner: UNT Libraries Government Documents Department

Evaluation of the HFBR fuel shipping cask versus requirements of ERDAM 0529. Informal report

Description: The HFBR Spent Fuel Shipping Cask as modified for shipping longer fuel elements is described in detail and evaluated against ERDAM 0529 standards for packaging; structural integrity under uniform loading or external pressure; criticality; normal transport conditions; hypothetical accident conditions; quality assurance; and operating procedures. (LCL)
Date: July 1, 1974
Creator: Bezler, P. & Milau, J.
Partner: UNT Libraries Government Documents Department

Fusion cross sections and reactivities

Description: Cross section and reactivity data are summarized for several important fusion reactions. Reactivities are included for both Maxwellian plasmas and beam- Maxwellian target fusion. Equations, tabular and also graphical presentations are included for convenience in a variety of applications. (auth)
Date: June 17, 1974
Creator: Miley, G.H.; Towner, H. & Ivich, N.
Partner: UNT Libraries Government Documents Department

Feasibility studies of an accelerator for the intense pulsed neutron source (IPNS)

Description: A proton linac plus synchrotron system was studied for the proposed Intense Pulsed Neutron Source (IPNS) at Argonne. An Alvarez H$sup -$ linac of 70 MeV and a high intensity fast cycling proton synchrotron to accelerate protons to 800 MeV will be the best choice to give a flux of 10$sup 16$ thermal neutron/sec cm$sup 2$ at the surface of moderator with a spallation neutron target of W or $sup 238$U. (auth)
Date: November 1, 1974
Creator: Khoe, T.K. & Kimura, M.
Partner: UNT Libraries Government Documents Department

Proposal for computer investigation of LMFBR core meltdown accidents

Description: The environmental consequences of an LMFBR accident involving breach of containment are so severe that such accidents must not be allowed to happen. Present methods for analyzing hypothetical core disruptive accidents like a loss of flow with failure to scram cannot show conclusively that such accidents do not lead to a rupture of the pressure vessel. A major deficiency of present methods is their inability to follow large motions of a molten LMFBR core. Such motions may lead to a secondary supercritical configuration with a subsequent energy release that is sufficient to rupture the pressure vessel. The Los Alamos Scientific Laboratory proposes to develop a computer program for describing the dynamics of hypothetical accidents. This computer program will utilize implicit Eulerian fluid dynamics methods coupled with a time-dependent transport theory description of the neutronic behavior. This program will be capable of following core motions until a stable coolable configuration is reached. Survey calculations of reactor accidents with a variety of initiating events will be performed for reactors under current design to assess the safety of such reactors. (auth)
Date: January 1, 1974
Creator: Boudreau, J.E.; Harlow, F.H.; Reed, W.H. & Barnes, J.F.
Partner: UNT Libraries Government Documents Department

Evaluation of the ERC virtual impactor

Description: Measurements have been made on a dichotomous virtual impactor developed by the Environmental Research Corporation. The object was to study the feasibility of employing the virtual impaction scheme in air samplers to collect size fractionated particle samples for subsequent x-ray fluorescence analysis. The size separation characteristics and losses as a function of particle size at specific locations within the apparatus were determined. It was found that except for the intrinsic losses near the size cut point, most of the losses can be significantiy reduced with improved design. The prospect of large scale deployment of virtual impactors for continuous air monitoring is favorable. (auth)
Date: January 1, 1974
Creator: Loo, B.W. & Jaklevic, J.M.
Partner: UNT Libraries Government Documents Department

Infrared spectrum of curium-244

Description: The spectrum of curium-244 has been observed on the high resolution Fourier-transform spectrometer at Laboratoire Aime Cotton. An electrodeless lamp containing 50 $mu$g of CmI$sub 3$ was run for 12 hours and 800,000 points were taken. A total of 1743 lines have been ascribed to curium and 87 percent of the lines have been assigned to transitions between known energy levels.
Date: September 1, 1974
Creator: Conway, J.G.; Blaise, J. & Verges, J.
Partner: UNT Libraries Government Documents Department

LIQUID XENON MULTIWIRE PROPORTIONAL CHAMBERS FOR NUCLEAR MEDICINEAPPLICATIONS

Description: The need for improved spatial resolution in nuclear medicine has long been recognized. Notable attempts to achieve this goal are the gas-filled wire chambers and solid-state detectors. (1) However, at energies above 100 keV, gas-filled chambers suffer from poor detection efficiency and a long recoil electron range in the gas. While it is advantageous to pressurize these chambers to 10 or more atmospheres, structural design of the thin window presents a formidable task. High-resolution optimal collimators do not appear to have sufficient strength to be used as a pressure support window. Solid-state detectors, while having the potential of a gamma camera with a superb energy resolution, are presently studied on a very small scale due to technological and cost limitations. Aside from the detector, the parallel-hole collimator presents a real limit to the resolution of the camera. A factor of two improvement in the resolution results in a factor of four loss in the collimator's transmission. A careful analysis of optimal collimators and the application of collimators designed for a specific depth range and resoluation are part of our overall program. Our goal has been the development of a liquid-xenon multiwire gamma camera with 2- to 3-mm spatial resolution, high counting-rate performance, high sensitivity, and the potential for scaling-up in size. Important ingredients for successful imaging in the prototype chamber discussed in this paper were the discovery of electron multiplication in liquid xenon, (2) the development of reliable purification techniques, (3) and the ability to extract electrons from the liquid into the gaseous phase. This paper is specifically addressed to the subject of detector development with liquid-xenon totally-filled chambers and recent work with dual-phase chambers in which the {gamma} rays are converted in the liquid phase and are electronically detected in the gaseous phase.
Date: May 1, 1974
Creator: Zaklad, H.; Derenzo, S.E.; Budinger, T.F. & Alvarez, L.W.
Partner: UNT Libraries Government Documents Department

TEST OF A LIQUID ARGON CHAMBER WITH 20-u m RMS RESOLUTION

Description: A measurement of the spatial resolution of a liquid-argon filled chamber was performed with minimum ionizing particles. Two multi-strip chambers with 20-{micro}m strip spacing operating in the ionization mode were used in the experiment. They perform in accordance with a simple model based on electron diffusion. An estimate of the amount of electron diffusion in liquid argon is given and the time jitter distribution has a FWHM of 200 ns. Under best conditions, the spatial resolution is better than 20 {micro}m rms with an efficiency of nearly 100%.
Date: July 1, 1974
Creator: Derenzo, S.E.; Kirschbaum, A.R.; Eberhard, P.H.; Ross, R.R. & Sclmitz,F.T.
Partner: UNT Libraries Government Documents Department

Pulsed Energy Storage System Design

Description: A superconductive energy storage magnet which is connected to the three phase power system could be designed, constructed, and placed in operation at Fermilab which would essentially eliminate the large repetitive power pulses now required from the power system. In addition to the power pulses, voltage flicker is also caused due to the reactive power pulsation. Specifically, a one megawatt hour superconductive energy storage magnet and a 2.00 megawatt thyristorized converter can achieve nullification of these power pulses up to 400 GEV synchrotron operation. Above 400 GEV, operation should be possible up to 500 GEV with appreciable less power pulsing requirements from the system than are now considered permissible. Carried to successful completion, this project would serve to advance applied superconductivity to a highly significant degree. The effect would be of world wide importance to both high energy physics and to the electric power industry. The preliminary magnet design is a 1 MWh dipole composed of cryogenically stable composite conductors connected in parallel with aluminum shield windings. The shield windings carry impressed pulsed currents while eliminating pulsed currents from the dc superconductive windings. Without pulsed currents or pulsed magnetic fields there are no ac losses in standard helium. The major radius of the dipole is 8.85 m; the minor radius is 0.69m; there are 188 turns at 80,000 A and each turn is 4 conductors wound in parallel. The 20,000 A TiNb-copper composite conductor is l0x 1.12 cm in cross section similar to but larger than the FNAL bubble chamber conductor. The shield is 188 turns (equal number of turns is a shielding condition) of hollow aluminum conductor cooled via circulated cold helium gas at 40K. The turns are spaced around the minor circumference according to a cosine distribution which produces zero internal field. In use the shield loss converted ...
Date: July 1, 1974
Creator: Biallis, G.; Cassel, R.L.; Fowler, W.; Livdahl, P.V.; Mills, F.E.; Palmer, M.L. et al.
Partner: UNT Libraries Government Documents Department