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Static and dynamic analyses on the MFTF-B vacuum vessel. Revision 1

Description: The Mirror Fusion Test Facility is a major magnetic fusion energy project at the Lawrence Livermore National Laboratory. An important component of this facility is the vacuum vessel, which forms the vacuum chamber. The vessel is supported on twenty-two pairs of legs that rest on reinforced concrete piers. In performing static and dynamic analyses on the vacuum vessel, we separately investigated the load distribution under gravity loads, pressure loads, electromagnetic loads, and thermal loads. … more
Date: January 15, 1984
Creator: Ng, D.S.
Partner: UNT Libraries Government Documents Department
open access

Three-dimensional linear analysis of fluid-structure interaction effects in the Mark I BWR pressure suppression torus

Description: Most analytical and experimental approaches to the evaluation of fluid-structure interaction (FSI) effects in the General Electric Mark I BWR pressure suppression system treat the torus shell as rigid when the shell in real systems is flexible. This report describes linear three-dimensional finite-element analyses of one torus bay that investigated the qualitative effect of torus wall flexibility on hydrodynamic loads induced by a nominal safety relief valve (SRV) discharge. The results of thes… more
Date: January 15, 1980
Creator: Holman, G.S.; McCauley, E.W. & Lu, S.C.
Partner: UNT Libraries Government Documents Department
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Effects of torus wall flexibility on forces in the Mark I BWR pressure suppression system under SRV T-quencher loading

Description: This report describes a series of extended analyses requested by the US Nuclear Regulatory Commission to provide qualified understanding of possible fluid/structure interaction (FSI) effects for SRV teequencher test results. Three input pulses with total impulses varying by up to a factor of five are applied to two-dimensional finite-element models of the Mark I torus with shell diameter-to-thickness ratios of 0, 300, and 600. The results of these analyses support earlier conclusions that incre… more
Date: January 15, 1980
Creator: Holman, G.S. & Lu, S.C.
Partner: UNT Libraries Government Documents Department
open access

Sugar-mediated semidian oscillation of gene expression in the cassava storage root regulates starch synthesis

Description: Starch branching enzyme (SBE) activity in the cassava storage root exhibited a diurnal fluctuation, dictated by a transcriptional oscillation of the corresponding SBE genes. The peak of SBE activity coincided with the onset of sucrose accumulation in the storage, and we conclude that the oscillatory mechanism keeps the starch synthetic apparatus in the storage root sink in tune with the flux of sucrose from the photosynthetic source. When storage roots were uncoupled from the source, SBE expres… more
Date: January 15, 2008
Creator: Jansson, Christer; Baguma, Yona; Sun, Chuanxin; Boren, Mats; Olsson, Helena; Rosenqvist, Sara et al.
Partner: UNT Libraries Government Documents Department
open access

Ground Penetrating Radar in Hydrogeophysics

Description: To meet the needs of a growing population and to provide us with a higher quality of life, increasing pressures are being placed on our environment through the development of agriculture, industry, and infrastructures. Soil erosion, groundwater depletion, salinization, and pollution have been recognized for decades as major threats to ecosystems and human health. More recently, the progressive substitution of fossil fuels by biofuels for energy production and climate change have been recognized… more
Date: January 15, 2008
Creator: Hubbard, Susan; Lambot, S.; Binley, A.; Slob, E. & Hubbard, S.
Partner: UNT Libraries Government Documents Department
open access

The continental margin is a key source of iron to the HNLC North Pacific Ocean

Description: Here we show that labile particulate iron and manganese concentrations in the upper 500m of the Western Subarctic Pacific, an iron-limited High Nutrient Low Chlorophyll (HNLC) region, have prominent subsurface maxima between 100-200 m, reaching 3 nM and 600 pM, respectively. The subsurface concentration maxima in particulate Fe are characterized by a more reduced oxidation state, suggesting a source from primary volcagenic minerals such as from the Kuril/Kamchatka margin. The systematics of the… more
Date: January 15, 2008
Creator: Lam, P. J. & Bishop, J. K. B
Partner: UNT Libraries Government Documents Department
open access

Measurement of the Decay B- to D*0 e- anti-nu_e

Description: Using 226 million B{bar B} events recorded on the {Upsilon}(4S) resonance with the BABAR detector at the SLAC e{sup +}e{sup -} PEP-II storage rings, they reconstruct B{sup -} {yields} D*{sup 0}e{sup -}{bar {nu}}{sub e} decays using the decay chain D*{sup 0} {yields} D{sup 0}{pi}{sup 0} and D{sup 0} {yields} K{sup -} {pi}{sup +}. From the dependence of their differential rate on the w, the dot product of the four-velocities of B{sup -} and D*{sup 0}, and using the form factor description by Capr… more
Date: January 15, 2008
Creator: Aubert, B.
Partner: UNT Libraries Government Documents Department
open access

Environmental Stewardship: How Semiconductor Suppliers Help to Meet Energy-Efficiency Regulations and Voluntary Specifications in China

Description: Recognizing the role that semiconductor suppliers can playin meeting energy-efficiency regulations and voluntary specifications,this paper provides an overview of Chinese policies and implementingbodies; a discussion of current programs, their goals, and effectiveness;and possible steps that can be taken tomeet these energy-efficiencyrequirements while also meeting products' high performance and costgoals.
Date: January 15, 2007
Creator: Aizhen, Li; Fanara, Andrew; Fridley, David; Merriman, Louise & Ju, Jeff
Partner: UNT Libraries Government Documents Department
open access

SUBSIDENCE STUDY FOR NONCRUSHABLE CONTAINERS IN SLIT TRENCHES AT THE SAVANNAH RIVER SITE

Description: This study addresses the issue of waste and cover subsidence caused by corrosion of the non-crushable waste containers defined as containers with significant void space that will not be stabilized by dynamic compaction of the Earea Slit Trenches at the Savannah River Site. Concentrations at the hypothetical 100-m well were evaluated for 1,000 years and compared with the base case value for compliance. To generalize the results, a hypothetical, no-decay radionuclide characterized by a Kd (5 ml/g… more
Date: January 15, 2008
Creator: Hang, T; Leonard Collard, L & Mark Phifer, M
Partner: UNT Libraries Government Documents Department
open access

Shear-slip analysis in multiphase fluid-flow reservoir engineeringap plications using TOUGH-FLAC

Description: This paper describes and demonstrates the use of the coupledTOUGH-FLAC simulator for geomechanical shear-slip (failure) analysis inmultiphase fluid-flow reservoir-engineering applications. Two approachesfor analyzing shear-slip are described, one using continuum stress-strainanalysis and another using discrete fault analysis. The use of shear-slipanalysis in TOUGH-FLAC is demonstrated on application examples related toCO2 sequestration and geothermal energy extraction. In the case of CO2sequest… more
Date: January 15, 2006
Creator: Rutqvist, Jonny; Birkholzer, Jens; Cappa, Frederic; Oldenburg,Curt & Tsang, Chin-Fu
Partner: UNT Libraries Government Documents Department
open access

Optimal Technology Selection and Operation of Microgrids inCommercial Buildings

Description: The deployment of small (<1-2 MW) clusters of generators,heat and electrical storage, efficiency investments, and combined heatand power (CHP) applications (particularly involving heat activatedcooling) in commercial buildings promises significant benefits but posesmany technical and financial challenges, both in system choice and itsoperation; if successful, such systems may be precursors to widespreadmicrogrid deployment. The presented optimization approach to choosingsuch systems and their o… more
Date: January 15, 2007
Creator: Marnay, Chris; Venkataramanan, Giri; Stadler, Michael; Siddiqui,Afzal; Firestone, Ryan & Chandran, Bala
Partner: UNT Libraries Government Documents Department
open access

Searches for Fractionally Charged Particles: What Should Be Done Next?

Description: Since the initial measurements of the electron charge a century ago, experimenters have faced the persistent question as to whether elementary particles exist that have charges that are fractional multiples of the electron charge. I concisely review the results of the last 50 years of searching for fractional charge particles with no confirmed positive results. I discuss the question of whether more searching is worthwhile?
Date: January 15, 2009
Creator: Perl, Martin L.
Partner: UNT Libraries Government Documents Department
open access

Risk Reduction Through Use of External Technical Reviews, Technology Readiness Assessments and Technical Risk Ratings - 9174

Description: The U.S. Department of Energy's Office of Environmental Management (DOE-EM) was established to achieve the safe and compliant disposition of legacy wastes and facilities from defense nuclear applications. A large majority of these wastes and facilities are 'one-of-a-kind' and unique to DOE. Many of the programs to treat these wastes have been 'first-of-a-kind' and unprecedented in scope and complexity. This has meant that many of the technologies needed to successfully disposition these wastes … more
Date: January 15, 2009
Creator: Cercy, M.; Steven, P.; Schneider, S.; Kurt, D. & Gerdes, K.
Partner: UNT Libraries Government Documents Department
open access

Compliance of SLAC_s Laser Safety Program with OSHA Requirements for the Control of Hazardous Energy

Description: SLAC's COHE program requires compliance with OSHA Regulation 29CFR1910.147, 'The control of hazardous energy (lockout/tagout)'. This regulation specifies lockout/tagout requirements during service and maintenance of equipment in which the unexpected energization or start up of the equipment, or release of stored energy, could cause injury to workers. Class 3B and Class 4 laser radiation must be considered as hazardous energy (as well as electrical energy in associated equipment, and other non-b… more
Date: January 15, 2009
Creator: Woods, Michael
Partner: UNT Libraries Government Documents Department
open access

High-Relaxivity MRI Contrast Agents: Where Coordination Chemistry Meets Medical Imaging

Description: The desire to improve and expand the scope of clinical magnetic resonance imaging (MRI) has prompted the search for contrast agents of higher efficiency. The development of better agents requires consideration of the fundamental coordination chemistry of the gadolinium(III) ion and the parameters that affect its efficacy as a proton relaxation agent. In optimizing each parameter, other practical issues such as solubility and in vivo toxicity must also be addressed, making the attainment of safe… more
Date: January 15, 2008
Creator: Werner, Eric J.; Datta, Ankona; Jocher, Christoph J. & Raymond, Kenneth N.
Partner: UNT Libraries Government Documents Department
open access

Laser Safety for the Experimental Halls at SLAC_s Linac Coherent Light Source (LCLS)

Description: The LCLS at the SLAC National Accelerator Laboratory will be the world's first source of an intense hard x-ray laser beam, generating x-rays with wavelengths of 1nm and pulse durations less than 100fs. The ultrafast x-ray pulses will be used in pump-probe experiments to take stop-motion pictures of atoms and molecules in motion, with pulses powerful enough to take diffraction images of single molecules, enabling scientists to elucidate fundamental processes of chemistry and biology. Ultrafast c… more
Date: January 15, 2009
Creator: Woods, Michael; Anthony, Perry; Barat, Ken; Gilevich, Sasha; Hays, Greg & White, William E.
Partner: UNT Libraries Government Documents Department
open access

BREMSSTRAHLUNG IN A DENSE PLASMA

Description: The bremsstrahlung emitted by an electron scattered in a Coulomb field was first calculated by Bethe and Heitler. The total cross section for production of photons with wave number between k and k + dk by a nonrelativistic electron of kinetic energy {epsilon} is d{sigma}/dk dk = 16/3 Z{sup 2}r{sub 0}{sup 2} (e{sup 2}/hc) (mc{sup 2}/{epsilon})log ({radical} {epsilon}/hck + {radical} {epsilon}/hck -1) dk/k, where Ze is the charge of the (heavy) ion, and r{sub 0} is the classical electron radius. … more
Date: January 15, 1963
Creator: Stack, John D. & Sessler, Andrew M.
Partner: UNT Libraries Government Documents Department
open access

PLUTONIUM FINISHING PLANT (PFP) 241-Z LIQUID WASTE TREATMENT FACILITY DEACTIVATION AND DEMOLITION

Description: Fluor Hanford, Inc. (FH) is proud to submit the Plutonium Finishing Plant (PFP) 241-Z liquid Waste Treatment Facility Deactivation and Demolition (D&amp;D) Project for consideration by the Project Management Institute as Project of the Year for 2008. The decommissioning of the 241-Z Facility presented numerous challenges, many of which were unique with in the Department of Energy (DOE) Complex. The majority of the project budget and schedule was allocated for cleaning out five below-grade tank … more
Date: January 15, 2008
Creator: GA, JOHNSTON
Partner: UNT Libraries Government Documents Department
open access

Antisense oligodeoxynucleotide inhibition as a potent diagnostic tool for gene function in plant biology

Description: Antisense oligodeoxynucleotide (ODN) inhibition emerges as an effective means for probing gene function in plant cells. Employing this method we have established the importance of the SUSIBA2 transcription factor for regulation of starch synthesis in barley endosperm, and arrived at a model for the role of the SUSIBAs in sugar signaling and source-sink commutation during cereal endosperm development. In this addendum we provide additional data demonstrating the suitability of the antisense ODN … more
Date: January 15, 2008
Creator: Jansson, Christer; Sun, Chuanxin; Ghebramedhin, Haile; Hoglund, Anna-Stina & Jansson, Christer
Partner: UNT Libraries Government Documents Department
open access

A Numerical Treatment of the Rf SQUID: II. Noise Temperature

Description: We investigate rf SQUIDs (Superconducting QUantum Interference Devices), coupled to a resonant input circuit, a readout tank circuit and a preamplifier, by numerically solving the corresponding Langevin equations and optimizing model parameters with respect to noise temperature. We also give approximate analytic solutions for the noise temperature, which we reduce to parameters of the SQUID and the tank circuit in the absence of the input circuit. The analytic solutions agree with numerical sim… more
Date: January 15, 2007
Creator: Kleiner, Reinhold; Koelle, Dieter & Clarke, John
Partner: UNT Libraries Government Documents Department
open access

FIELD INVESTIGATIONS OF THE DRIFT SHADOW

Description: The ''Drift Shadow'' is defined as the relatively drier region that forms below subsurface cavities or drifts in unsaturated rock. Its existence has been predicted through analytical and numerical models of unsaturated flow. However, these theoretical predictions have not been demonstrated empirically to date. In this project they plan to test the drift shadow concept through field investigations and compare our observations to simulations. Based on modeling studies they have an identified suit… more
Date: January 15, 2006
Creator: G. W. Su, T. J. Kneafsey, T. A. Ghezzehei, B. D. Marshall, and P. J. Cook
Partner: UNT Libraries Government Documents Department
open access

Modeling of coupled heat transfer and reactive transport processesin porous media: Application to seepage studies at Yucca Mountain, Nevada

Description: When hot radioactive waste is placed in subsurface tunnels, a series of complex changes occurs in the surrounding medium. The water in the pore space of the medium undergoes vaporization and boiling. Subsequently, vapor migrates out of the matrix pore space, moving away from the tunnel through the permeable fracture network. This migration is propelled by buoyancy, by the increased vapor pressure caused by heating and boiling, and through local convection. In cooler regions, the vapor condenses… more
Date: January 15, 2007
Creator: Mukhopadhyay, S.; Sonnenthal, E.L. & Spycher, N.
Partner: UNT Libraries Government Documents Department
open access

Modeling of coupled heat transfer and reactive transport processes in porous media: Application to seepage studies at Yucca Mountain, Nevada

Description: When hot radioactive waste is placed in subsurface tunnels, a series of complex changes occurs in the surrounding medium. The water in the pore space of the medium undergoes vaporization and boiling. Subsequently, vapor migrates out of the matrix pore space, moving away from the tunnel through the permeable fracture network. This migration is propelled by buoyancy, by the increased vapor pressure caused by heating and boiling, and through local convection. In cooler regions, the vapor condenses… more
Date: January 15, 2007
Creator: Mukhopadhyay, Sumit; Sonnenthal, Eric L. & Spycher, Nicolas
Partner: UNT Libraries Government Documents Department
open access

CRITICALITY SAFETY OF PROCESSING SALT SOLUTION AT SRS

Description: High level radioactive liquid waste generated as a result of the production of nuclear material for the United States defense program at the Savannah River Site has been stored as 36 million gallons in underground tanks. About ten percent of the waste volume is sludge, composed of insoluble metal hydroxides primarily hydroxides of Mn, Fe, Al, Hg, and most radionuclides including fission products. The remaining ninety percent of the waste volume is saltcake, composed of primarily sodium (nitrite… more
Date: January 15, 2008
Creator: Stephens, K; Davoud Eghbali, D & Michelle Abney, M
Partner: UNT Libraries Government Documents Department
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