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Experimental Investigation of the Root Cause Mechanism and Effectiveness of Mitigating Actions for Axial Offset Anomaly in Pressurized Water Reactors

Description: Axial offset anomaly (AOA) in pressurized water reactors refers to the presence of a significantly larger measured negative axial offset deviation than predicted by core design calculations. The neutron flux depression in the upper half of high-power rods experiencing significant subcooled boiling is believed to be caused by the concentration of boron species within the crud layer formed on the cladding surface. Recent investigations of the root-cause mechanism for AOA [1,2] suggest that boron … more
Date: July 2, 2005
Creator: Abdel-Khalik, Said
Item Type: Refine your search to only Report
open access

Measurements of Transverse Energy Distributions in Au+Au Collisions at {radical}s{sub NN} = 200 GeV

Description: Transverse energy (E{sub T}) distributions have been measured for Au+Au collisions at {radical}s{sub NN} = 200 GeV by the STAR collaboration at RHIC. E{sub T} is constructed from its hadronic and electromagnetic components, which have been measured separately. E{sub T} production for the most central collisions is well described by several theoretical models whose common feature is large energy density achieved early in the fireball evolution. The magnitude and centrality dependence of E{sub T}… more
Date: July 2, 2004
Creator: Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D.; Arkhipkin, D. et al.
Item Type: Refine your search to only Article
open access

The Virtual Library in Action

Description: The SLAC Library has for many years provided SPIRES-HEP, a 300,000 record bibliographic database, to the world particle physics community via the Internet as well as through clone sites in Europe and Japan. The 1991 introduction of the e-print archives at LANL coupled with the World-Wide-Web (WWW) from CERN suddenly made it possible to provide easy linkage between bibliographic database records and the actual full-text of papers. The SLAC Library has turned this possibility into reality by conv… more
Date: July 2, 1999
Creator: Addis, Louise
Item Type: Refine your search to only Report
open access

Molecular size and structure in pyridine extracts of upper Freeport coal as separated by M41S sieving.

Description: The determination of the structure of coal has long been of interest due to its crucial importance in research on reactivity and processing. However, the chemically and physically heterogeneous nature of coals makes determination of the chemical nature of even the building blocks complicated, since the molecular structure and molecular weight distribution are not dependent on a single molecule or repeat unit as in technical polymers or biopolymers, but on a complex mixture of molecules and pote… more
Date: July 2, 1999
Creator: Ahrens, M.; Hunt, J. E.; Winans, R. E. & Xu, L.
Item Type: Refine your search to only Article
open access

Parallel Computation of Intergrated Electronmagnetic, Thermal and Structural Effects for Accelerator Cavities

Description: The successful operation of accelerator cavities has to satisfy both rf and mechanical requirements. It is highly desirable that electromagnetic, thermal and structural effects such as cavity wall heating and Lorentz force detuning in superconducting rf cavities can be addressed in an integrated analysis. Based on the SLAC parallel finite-element code infrastructure for electromagnetic modeling, a novel multi-physics analysis tool has been developed to include additional thermal and mechanical … more
Date: July 2, 2008
Creator: Akcelik, V.; Candel, A.; Kabel, A.; Lee, L. Q.; Li, Z.; Ng, C. K. et al.
Item Type: Refine your search to only Article
open access

Substructure of High-pT Jets at the LHC

Description: We study high-p{sub T} jets from QCD and from highly-boosted massive particles such as tops, W,Z and Higgs, and argue that infrared-safe observables can help reduce QCD backgrounds. Jets from QCD are characterized by different patterns of energy flow compared to the products of highly-boosted heavy particle decays, and we employ a variety of jet shapes, observables restricted to energy flow within a jet, to explore this difference. Results from Monte Carlo generators and arguments based on pert… more
Date: July 2, 2008
Creator: Almeida, L.G.; Lee, S.J.; Perez, G.; Sterman, G.; Sung, I. & Virzi, J.
Item Type: Refine your search to only Article
open access

An Economic Analysis and Brief Legislative Overview of Usury Ceilings

Description: This report gives an economic analysis of usury ceilings, laws which set the maximum legal rate of interest to be charged on particular types of loans. It provides a brief overview of recent Federal l e g i s l a t i o n dealing with usury, with special emphasis on the Federal authorities mandated by P.L. 96-221, and the effectiveness of Federal preemption of State usury laws.
Date: July 2, 1981
Creator: Anderson, William
Item Type: Refine your search to only Report
open access

The Lyman Alpha Forest in hierarchical cosmologies

Description: The comparison of quasar absorption spectra with numerically simulated spectra from hierarchical cosmological models of structure formation promises to be a valuable tool to discriminate among these models. We present simulation results for the column density, Doppler b parameter, and optical depth probability distributions for five popular cosmological models.
Date: July 2, 1999
Creator: Anninos, P.; Bryan, G. L.; Machacek, M.; Moiksin, A.; Norman, M. L. & Zhang, Y.
Item Type: Refine your search to only Article
open access

The United States and Europe: Current Issues

Description: The United States and Europe share a long and intertwined history. Both sides of the Atlantic face a common set of international concerns, have few other comparable partners, and share a deep economic relationship. Despite much improvement in overall relations since the divisive debate over Iraq policy, several foreign policy and trade disputes remain. This report examines the current state of the transatlantic relationship and key issues that may have implications for U.S. interests in the sec… more
Date: July 2, 2008
Creator: Archick, Kristin
Item Type: Refine your search to only Report
open access

The browser prototype for the CTBT knowledge base

Description: As part of the United States Department of Energy`s (DOE) Comprehensive Test Ban Treaty (CTBT) research and development effort, a Knowledge Base is being developed. This Knowledge Base will store the regional geophysical research results as well as geographic contexual information and make this information available to the Automated Data Processing (ADP routines) as well as human analysts involved in CTBT monitoring. This paper focuses on the initial development of a browser prototype to be use… more
Date: July 2, 1997
Creator: Armstrong, H.M. & Keyser, R.G.
Item Type: Refine your search to only Article
open access

Interaction of polymer with clays.

Description: Normally synthetic well defined monodisperse discotic laponite clays are known to form a gel phase at mass concentrations as low as a few percent in distilled water. Hydrosoluble polymer polyethylene oxide was added to this intriguing clay system, it was observed that it either prevents gelation or slows it down extremely depending on the polymer weight, concentration or the laponite concentration. Small Angle Neutron scattering (SANS) was used to study these systems because only by isotopic la… more
Date: July 2, 1999
Creator: Auvray, L. & Lal, J.
Item Type: Refine your search to only Article
open access

Data Quality Objectives for Tank Farms Waste Compatibility Program

Description: There are 177 waste storage tanks containing over 210,000 m{sup 3} (55 million gal) of mixed waste at the Hanford Site. The River Protection Project (RPP) has adopted the data quality objective (DQO) process used by the U.S. Environmental Protection Agency (EPA) (EPA 1994a) and implemented by RPP internal procedure (Banning 1999a) to identify the information and data needed to address safety issues. This DQO document is based on several documents that provide the technical basis for inputs and … more
Date: July 2, 1999
Creator: BANNING, D.L.
Item Type: Refine your search to only Report
open access

Antibaryon production in AU+AU collisions at the AGS.

Description: Experiment E917 at the Brookhaven AGS has made a measurement of near-mid-rapidity antibaryon production in both the antiproton and antilambda channel. Results on dN/dy and inverse slope parameters are shown. A preliminary measurement of the ratio {bar {Lambda}}/{bar p} is also presented.
Date: July 2, 1999
Creator: Back, B. B.; Betts, R. R.; Chang, J.; Chang, W. C.; Chi, C. Y.; Collaboration, E917 et al.
Item Type: Refine your search to only Article
open access

Low-budget muon source

Description: Generation of muon beams with protons on a current-carrying target followed by a lithium lens and a quadrupole decay channel is considered. A 8 GeV proton beam from the Fermilab Booster is used to provide a muon beam for the MUCOOL experiment for ionization cooling demonstration. The proposed scheme can also be used to create muon beams with a fraction of a 1 GeV proton beam of the Spallation Neutron Source. Monte Carlo simulations of the entire system are performed. For both cases optimization… more
Date: July 2, 2001
Creator: Balbekov, Valeri I. & Mokhov, Nikolai V.
Item Type: Refine your search to only Article
open access

Analytical results on leachings from Nutsche Filters

Description: This report describes results of an investigation to determine whether plutonium nitrates and lanthanum compounds were being entrained on the filter aid and filter block of the Nutsche Filters in Cell 2 of Bldg. 231. Leach samples were analyzed for La, Pu, phosphate, fluoride, Pu{sup 240}, and Am. From the data the authors concluded that the holdup on the Nutsche Filter is due to insoluble plutonium compounds either filtered from solution, or more likely, formed on the filter. These compounds w… more
Date: July 2, 1951
Creator: Barton, G.B.
Item Type: Refine your search to only Report
open access

U.S. Virgin Islands Emergency Management and Homeland Security Statutory Authorities Summarized

Description: This report is one of a series that profiles the emergency management and homeland security statutory authorities of the 50 states, the District of Columbia, the Commonwealth of the Northern Mariana Islands, the Commonwealth of Puerto Rico, and three territories (American Samoa, Guam, and the U.S. Virgin Islands). Each profile identifies the more significant elements of state statutes, generally as codified. This report focuses on the U.S. Virgin Islands.
Date: July 2, 2004
Creator: Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Item Type: Refine your search to only Report
open access

Wisconsin Emergency Management and Homeland Security Statutory Authorities Summarized

Description: This report is one of a series that profiles the emergency management and homeland security statutory authorities of the 50 states, the District of Columbia, the Commonwealth of the Northern Mariana Islands, the Commonwealth of Puerto Rico, and three territories (American Samoa, Guam, and the U.S. Virgin Islands). Each profile identifies the more significant elements of state statutes, generally as codified. This report focuses on the state of Wisconsin.
Date: July 2, 2004
Creator: Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
Item Type: Refine your search to only Report
open access

Lifetime of the 1s2p {sup 1}P{sub 1} Excited Level in Fe{sup 24+}

Description: Measurements of the spectrum of Fe{sup 24+} in the 1.845 {angstrom} to 1.885 {angstrom} range obtained on the EBIT-I electron beam ion trap at Lawrence Livermore National Laboratory were used for determining the radiative lifetime of the ls2p {sup 1}P{sub 1} excited state. The spectrum contains electric dipole forbidden transitions at 1.855{angstrom} (''x'') and 1.868{angstrom} (''z'') whose lineshape is well represented by a Gaussian line profile and is assumed to be due primarily to Doppler a… more
Date: July 2, 2002
Creator: Beiersdorfer, P; Graf, A; Harris, C L; Hwang, D Q & Neill, P A
Item Type: Refine your search to only Article
open access

Troop Levels in the Afghan and Iraq Wars, FY2001-FY2012: Cost and Other Potential Issues

Description: In February and March 2009, the Obama Administration announced its overall plans to increase troop levels in Afghanistan and decrease troop levels in Iraq for 2009 through 2011. Using several Department of Defense (DOD) data reports, this report describes, analyzes, and estimates deployed troop strength from the 9/11 attacks to FY2012 to provide Congress with a tool to assess current and future DOD war funding requests; implications for the U.S. military presence in the region; and deployment … more
Date: July 2, 2009
Creator: Belasco, Amy
Item Type: Refine your search to only Report
open access

Solution structures of {beta}-amyloid{sub 10-35} and {beta}-amyloid{sub 10-35} PEG3000 aggregates.

Description: Small angle neutron and x-ray scattering (SANS/SAXS) studies were conducted on the structure of the aggregates formed from both the truncated model peptide {beta}-Amyloid(10-35) (A{beta}{sub 10-35}) and a block copolymer {beta}-Amyloid (10-35)-PEG3000 (A{beta}{sub 10-35}-PEG) in D{sub 2}O at pHs from 3.0 to 7.0. These studies indicate that A{beta}{sub 10-35} aggregates into rod-like particles (fibril) and their radii are strongly dependent on the Pm of the solution. The fibril-fibril associatio… more
Date: July 2, 1999
Creator: Benzinger, T. L. S.; Burkoth, T. S.; Gordon, D.; Lynn, D. G.; Meredith, S. C.; Morgan, D. M. et al.
Item Type: Refine your search to only Article
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