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Measurement of the fission cross section of /sup 238/Pu

Description: The fission cross sections of /sup 238/Pu have been measured from 0.1 eV to 80 keV energy range using the Rensselaer Intense Neutron Spectrometer. The cross sections were normalized to the /sup 235/U ENDF/B-V data broadened to the resolution of the Rensselaer Intense Neutron Spectrometer system. The fission areas and widths were determined for the resolved low-energy resonances. The ENDF/B-V fission cross sections for the /sup 238/Pu isotope are, in general, not in good agreement with the measu… more
Date: July 1, 1986
Creator: Alam, B.; Block, R. C.; Slovacek, R. E. & Hoff, R. W.
Item Type: Refine your search to only Article
open access

Electromagnetic Structure of Nuclei

Description: A brief review is given of selected topics in the electromagnetic structure of nucleons and nuclei, including nucleon form factors from both quantum chromodynamics and electron scattering data, measurements of the deuteron and triton form factors, quasi-elastic scattering, and the EMC effect. 47 refs., 13 figs. (LEW)
Date: July 1, 1986
Creator: Arnold, R. G.
Item Type: Refine your search to only Article
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Hazard classification method for facilities containing toxic chemicals at the Pacific Northwest Laboratory

Description: This document presents guidance to management on how to proceed in determining if the quantity of nonradioactive toxic materials in any Pacific Northwest Laboratory (PNL) or PNL-managed facility constitutes a potential threat to the public or to employees outside the facility. The ''Immediately Dangerous to Life or Health'' concept developed by the Department of Health, the Institute of Occupational Safety and Health, the Occupational Safety and Health Administration, and contractors who work w… more
Date: July 1, 1986
Creator: Backman, G. E.; Denovan, J. T.; Nisick, N. P. & Piatt, J. A.
Item Type: Refine your search to only Report
open access

Proposed tandem mirror research program for FY87 presented to the MFAC subcommittee on mirror research, July 8-9, 1986

Description: We have reexamined the goal of approx.10/sup 13/ cm/sup -3/ central-cell density with end-plugging and reconfirmed its importance as a test of thermal barrier end-plugging performance in either Tara or TMX-U. We conclude that, when all factors are considered including the impact on other programs interlinked with LLNL in the present OFE budget, the lowest cost approach to have a fair chance to meet this goal is to extend Tara operation for the full FY87. Continuation of TMX-U operation in FY87,… more
Date: July 23, 1986
Creator: Baldwin, D. E.; Correll, D. L.; Fowler, T. K.; Grubb, D. P.; Hershkowitz, N.; Porter, G. D. et al.
Item Type: Refine your search to only Report
open access

Investigation of a fossil geothermal system, Hamblin-Cleopatra Volcano, Clark County, Nevada. Final technical report

Description: The Hamblin-Cleopatra volcano, selected for study because erosion and fault displacement have exposed the entire volcanic succession, the intrusive core, a radial dike systems, and sedimentary and volcanic rocks that predate and postdate the volcano, was investigated to estimate the proportions of igneous materials forming lava flows, pyroclastic deposits, intrusive bodies, and reworked debris. Chemical changes in the magma throughout the active period of the volcano were documented. The geothe… more
Date: July 28, 1986
Creator: Barker, D.S.
Item Type: Refine your search to only Report
open access

Hard Diffractive Processes: QCD models

Description: We discuss high energy hadron collisions that contain a hard scattering, in the sense that a W, a Z, very heavy quarks, or high P/sub T/ jets are produced, yet are diffractive, in the sense that one of the incident hadrons is scattered with only a small energy loss. In our approach, the cross section for such diffractive hard scattering is a part of the normal hard scattering inclusive cross section, as calculated using perturbative quantum chromodynamics. We use Regge phenomenology in combinat… more
Date: July 1, 1986
Creator: Berger, Edmond L.; Collins, John C.; Soper, Davison E. & Sterman, George
Item Type: Refine your search to only Report
open access

DC septum magnets for the damping rings of the SLC SLAC Linear Collider

Description: The injection/extraction systems of the 1.21 GeV Stanford Linear Collider (SLC) damping rings uses four pairs of water cooled septum magnets. Each pair consists of a thin-septum, low-field (3 mm, 3 kilogauss) magnet plus a thick-septum, high-field (12 mm, 8 kilogauss) model. In the latest design cooling reliability was improved by using stainless-steel tubing imbedded in the copper. The operating current in each is 2600 amperes, at a density of up to 120 amperes per mmS. Plasma-sprayed alumina … more
Date: July 1, 1986
Creator: Bijleveld, J.; Peterson, J. M. & Jensen, D.
Item Type: Refine your search to only Article
open access

Measurements of the toroidal plasma rotation velocity in TFTR major-radius compression experiments with auxiliary neutral beam heating

Description: The time history of the central toroidal plasma rotation velocity in Tokamak Fusion Test Reactor (TFTR) experiments with auxiliary heating by neutral deuterium beam injection and major-radius compression has been measured from the Doppler shift of the emitted TiXXI-K..cap alpha.. line radiation. The experiments were conducted for neutral beam powers in the range from 2.1 to 3.8 MW and line-averaged densities in the range from 1.8 to 3.0 x 10/sup 19/ m/sup -2/. The observed rotation velocity inc… more
Date: July 1, 1986
Creator: Bitter, M.; Scott, S.; Wong, K. L.; Goldston, R. J.; Grek, B.; Von Goeler, S. et al.
Item Type: Refine your search to only Report
open access

Preliminary performance estimates of binary geothermal cycles using mixed-halocarbon working fluids

Description: The performance of Rankine cycle binary systems for power generation using a hydrothermal resource has been investigated as a part of the DOE/GTD Heat Cycle Research Program. To date mixtures of paraffin-type hydrocarbons and water-ammonia mixtures have been investigated. This report gives the first results of the consideration of mixtures of halocarbons as working fluids in these power cycles. The performance of mixtures of Refrigerant-114 (R-114) and Refrigerant-22 (R-22) in combinations from… more
Date: July 1, 1986
Creator: Bliem, C.J.
Item Type: Refine your search to only Report
open access

Glass Making Technology for High-Level Nuclear Waste

Description: This paper addresses specific and unique chemical engineering aspects of the Defense Waste Processing Facility (DWPF) at the Savannah River Plant. This paper also addresses the glass melter and those processes that are directly coupled to it. A somewhat disproportionate emphasis is given to sludge pretreatment, for the sake of completeness in this session. We have attempted to focus on those features of the DWPF that may be of general interest or even useful to the practicing chemical engineer.
Date: July 10, 1986
Creator: Boersma, M. D. & Mahoney, J. L.
Item Type: Refine your search to only Article
open access

Measurement and modeling of external radiation during 1984 from LAMPF atmospheric emissions

Description: An array of three portable, pressurized ionization chambers (PICs) measured short-term external radiation levels produced by air activation products from the Los Alamos Meson Physics Facility (LAMPF). The monitoring was at the closet offsite location, 700-900 m north and northeast of the source, and across a large, deep canyon. A Gaussian-type atmospheric dispersion model, using onsite meteorological and stack release data, was tested during their study. Monitoring results indicate that a persi… more
Date: July 1, 1986
Creator: Bowen, B.M.; Olsen, W.A.; Van Etten, D. & Chen, I.
Item Type: Refine your search to only Report
open access

Kokanee Stock Status and Contribution of Cabinet Gorge Hatchery, Lake Pend Oreille, Idaho, 1985 Annual Progress Report.

Description: Mid-water trawling techniques were used during September to estimate kokanee population abundance, structure and survival. Abundance in 1985 was estimated at 4.5 million fish (198 per hectare), down from over 12 million kokanee in 1974 when the population was first monitored. Hatchery fry production (<6 million annually) has stabilized kokanee abundance since its initial decline in the late 1960s. Wild fry recruitment has remained relatively stable at 1.8 million since 1978; whereas recruitment… more
Date: July 1, 1986
Creator: Bowles, Edward C.
Item Type: Refine your search to only Report
open access

Two-photon exclusive processes in quantum chromodynamics

Description: QCD predictions for ..gamma gamma.. annihilation into single mesons, meson pairs, and baryon pairs are reviewed. Two-photon exclusive processes provide the most sensitive and practical measure of the distribution amplitudes, and thus a critical confrontation between QCD and experiment. Both the angular distribution and virtual photon mass dependence of these amplitudes are sensitive to the shapes of the phi (chi, Q). Novel effects involving the production of qq anti q anti q states at threshold… more
Date: July 1, 1986
Creator: Brodsky, Stanley J.
Item Type: Refine your search to only Article
open access

MEVVA ion source for high current metal ion implantation

Description: The MEVVA (Metal Vapor Vacuum Arc) ion source is a new kind of source which can produce high current beams of metal ions. Beams of a wide range of elements have been produced, spanning the periodic table from lithium up to and including uranium. The source extraction voltage is up to 60 kV, and we are increasing this up to 120 kV. A total ion beam current of over 1 Ampere has been extracted from the present embodiment of the concept, and this is not an inherent limit. The ion charge state distr… more
Date: July 1, 1986
Creator: Brown, I. & Washburn, J.
Item Type: Refine your search to only Article
open access

Fragmentation model applied to exclusive final states in photon-photon collisions

Description: Monte Carlo calculations with the Lund string fragmentation model are compared to experimental results on the reactions ..gamma gamma -->..2..pi../sup +/2..pi../sup -/, ..gamma gamma -->..K/sup +/K/sup -/..pi../sup +/..pi../sup -/ and ..gamma gamma -->..p anti p..pi../sup +/..pi../sup -/. It is found, that when the parameters of the Lund model are tuned to low energy, inclusive multi hadron production in photon-photon collisions, the cross sections of exclusive processes near threshold are qual… more
Date: July 1, 1986
Creator: Buijs, A.
Item Type: Refine your search to only Article
open access

Control of beam dynamics in high energy induction linacs

Description: The Advent of laser-ion-guiding in the Advanced test Accelerator along with the development of accelerator cavities optimized with respect to beam breakup coupling impedence now make it possible to consider a new class of high current, high emergy linear induction accelerators. The control of the beam breakup and other instabilities by laser guiding and by various magnetic focusing schemes will be discussed along with the scaling laws for the design of such machines to minimize the growth of th… more
Date: July 29, 1986
Creator: Caporaso, G.J.
Item Type: Refine your search to only Article
open access

Shock waves in luminous early-type stars

Description: Shock waves that occur in stellar atmospheres have their origin in some hydrodynamic instability of the atmosphere itself or of the stellar interior. In luminous early-type stars these two possibilities are represented by shocks due to an unstable radiatively-accelerated wind, and to shocks generated by the non-radial pulsations known to be present in many or most OB stars. This review is concerned with the structure and development of the shocks in these two cases, and especially with the mass… more
Date: July 1, 1986
Creator: Castor, John I.
Item Type: Refine your search to only Article
open access

Radionuclide transport through penetrations in nuclear waste containers

Description: Penetrations may result from corrosion or cracking and may be through the container material or through deposits of corrosion products. The analysis deals with the resultant radionuclide transport, but not with how these penetrations occur. We provide numerical illustrations for diffusive nuclide flux through these apertures from mathematical expressions. 2 refs., 2 figs.
Date: July 1, 1986
Creator: Chambre, P. L.; Lee, W. W. L.; Kim, C. L. & Pigford, T. H.
Item Type: Refine your search to only Article
open access

Steady-state and transient radionuclide transport through penetrations in nuclear waste containers

Description: The transport of radionuclides through penetrations in wastes containers is analyzed. Penetrations may result from corrosion or cracks and may occur in the original container material, in degraded or corroded material, or in deposits of corrosion products. In this report we do not consider how these penetrations occur or the characteristics of expected penetrations in waste containers. We are concerned here only with the analytical formulation and solutions of equations to predict rates of mass… more
Date: July 1, 1986
Creator: Chambre, P. L.; Lee, W. W. L.; Kim, C. L. & Pigford, T. H.
Item Type: Refine your search to only Report
open access

Mathematical and numerical models to achieve high speed with special-purpose parallel processors

Description: One simulation facility that has been developed is the BNL Plant Analyzer, currently set up for BWR plant simulations at up to seven times faster than real-time process speeds. The principal hardware components of the BNL Plant Analyzer are two units of special-purpose parallel processors, the AD10 of Applied Dynamics International and a PDP-11/34 host computer. The AD10 is specifically designed for time-critical system simulations, utilizing the modern parallel processing technology with pipel… more
Date: July 1, 1986
Creator: Cheng, H.S.; Wulff, W. & Mallen, A.N.
Item Type: Refine your search to only Article
open access

Ultrasonic detection of laminar-type defects in iridium alloy blanks

Description: Encapsulated isotopic heat sources for use in generating electrical power for space applications require flight-quality hardware material. Iridium is the chosen material for such applications, and Oak Ridge National Laboratory has been the prime supplier of iridium alloy forming blanks 52 mm in diameter by 0.66 mm thick (1.0 by 0.026 in.). Prior to the work reported here, these blanks were ultrasonically examined by using 0.9-mm-diam (0.035-in.) simulated flaw standards. However, as a result of… more
Date: July 1, 1986
Creator: Cook, K. V.; Cunningham, Jr., R. A.; Simpson, W. A., Jr. & McClung, R. W.
Item Type: Refine your search to only Report
open access

Pulsations of white dwarf stars with thick hydrogen or helium surface layers

Description: In order to see if there could be agreement between results of stellar evolution theory and those of nonradial pulsation theory, calculations of white dwarf models have been made for hydrogen surface masses of 10/sup -4/ solar masses. Earlier results indicated that surface masses greater than 10/sup -8/ solar masses would not allow nonradial pulsations, even though all the driving and damping is in surface layers only 10/sup -12/ of the mass thick. It is shown that the surface mass of hydrogen … more
Date: July 1, 1986
Creator: Cox, Arthur N.; Starrfield, Sumner G.; Kidman, Russell B. & Pesnell, W. Dean
Item Type: Refine your search to only Article
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