The design of the active source for active and passive computed tomography (A&PCT) is critical with respect to accuracy and throughput. The A&PCT active source requirements are highly dependent upon the attenuation properties of the waste matrix within the drum. On of the most highly attenuating waste matrices is sludge. This waste stream will consist of solidified aqueous waste consisting of IDC 001 first stage sludge and IDC 007 wet sludge. Also, the stream consists of solidified organic waste known as code IDC 003 organic setups. We have evaluated the sludge drum data that was previously acquired on the WIT system and have determined that the active source activity must be increased to provide reasonable throughput. The sludge drum that is evaluated here is drum CEPRF11. CEPRF11 is a test drum that was part of the Nondestructive Assay system Capability Evaluation Project (CEP) and contained an actual Rocky Flats waste that is categorized as code 003 solidified organic waste. The full drum was evaluated and found to be somewhat homogenous; therefore, a single slice is arbitrarily chosen to represent the entire drum. Slice number 8 is used and is located approximately at the center of the drum. Figure 1 shows …

The proton driver for the muon collider must produce short pulses of protons in order to facilitate muon cooling and operation with polarized beams. In order to test methods of producing these bunches they have operated the AGS near transition and studied procedures which involved moving the transition energy {gamma} to the beam energy. They were able to produce stable bunches with RMS widths of {sigma} = 2.2-2.7 ns for longitudinal bunch areas of {minus}1.5 V-s, in addition to making measurements of the lowest two orders of the momentum compaction factor.

Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.

Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.

In its most elemental form, the federal budget is a comprehensive accounting of the government’s spending, revenues, and borrowing. This fact sheet provides a brief overview of the basic terminology and concepts used in the federal budget process.

Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.

This report summarizes legal actions of the efforts of the Bureau of Census to include two sample surveys into the 2000 census. This has resulted in a mix reaction from Congress.

Plans by the Bureau of the Census to incorporate data from two new sample surveys into the 2000 decennial census count have had a mixed congressional reception. Three sampling bills in the 105th Congress (H.R. 1220, H.R. 1178, and H.R. 776) have been referred to committee, without further action. Sampling has been debated chiefly in the appropriations process (H.R. 1469, H.R. 1871 [P.L. 105-18; 111 Stat. 158], and H.R. 2267/S. 1022 [P.L. 105-119; 111 Stat. 2440]). The bureau now is a defendant in two anti-sampling suits brought under P.L. 105-119. The law also established a Census Monitoring Board and directed the bureau to prepare for a traditional headcount in 2000, not just to continue with its sampling plans.

Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.

The United States is implementing a program to dispose of excess nuclear-weapons-usable materials--including {sup 233}U. A series of studies have identified multiple {sup 233}U disposition options, and these options are described herein. Most of the options involve adding depleted uranium containing {sup 238}U to the {sup 233}U. Converting the {sup 233}U into a mixture of <12 wt % {sup 233}U in {sup 238}U converts the weapons-usable {sup 233}U into nonweapons-usable {sup 233}U. For {sup 233}U that is considered waste, further isotopic dilution to <0.66 wt % {sup 233}U in {sup 238}U minimizes potential long-term repository criticality concerns and in many cases minimizes final waste volumes.

Modification of the growth of scattering processes in the case of multiple beam irradiation compared to single beam irradiation has been investigated in a preformed plasma using Thomson scattrering of a short wavelength probe beam, and spectral and temporal analysis of reflected and transmitted light. First observations of the reduction of the amplitude of ion acoustic waves associated with stimulated Brillouin scattering, amplification of the amplitude of electron plasma waves associated with stimulated Raman scattering, and transfer of energy between crqssing beams with same frequency in a flowing plasma under crossed beam irradiation are reported.

Hardfacing alloys are weld deposited to provide a wear resistant surface for structural base materials. Commercial low cobalt hardfacing alloys are being evaluated to reduce plant activation levels. Since hardfacing alloys typically must be resistant to cracking to assure adequate in service performance, fracture toughness is a critical material property. Fracture toughness (K{sub IC}) measurements of Fe base, Ni-base, and Co-base hardfacing were performed in accordance with ASTM E399-90 procedure in an effort to identify a tough cobalt-free alternative. Reduced scatter in K{sub IC} data was observed for the Fe base hardfacing, and the 95% lower bound K{sub IC} values were generally higher than the Ni-base Hardfacing alloys. Preliminary crack growth data obtained during precracking indicate that the Ni-base hardfacing possess better fatigue crack growth resistance. However, none of the Fe-base or Ni-base hardfacing have K{sub IC} values that are comparable to the reference Co-base hard facing. The test specimens were machined from thick (0.5 inches) weld deposits, and the microstructures of the test specimens are compared with the more prototypic, thinner deposits. Microstructural and fractographic examinations are used to characterize the fracture mechanisms and delineate the operative toughening mechanisms. Crack deflection and crack bridging toughening mechanisms are shown to …

At LLNL a multiscale modeling program based on information-passing has been established for modeling the strength properties of a body-centered-cubic metal (tantalum) ,. under conditions of extreme plastic deformation. The plastic deformation experienced by an explosively-formed shaped-charge jet is an example of �extreme deformation�. The shaped charge liner material undergoes high strain rate deformation at high hydrostatic pressure. The constitutive model for flow stress, which describes the deformation, is highly dependent on pressure, temperature, and strain-rate. Current material models can not be extrapolated to these extreme conditions because the underlying mechanisms of plastic deformation are poorly reflected in the models and laboratory experiments are limited to pressures orders of magnitude less than actual pressures. This disparity between actual deformation conditions and those that can be attained in laboratory experiments is the principle motivation behind the multiscale modeling program. The fundamental elements of LLNL� s multiscale modeling program are distinct models at the atomistic, microscale and mesoscale/continuum length scales. The information that needs to be passed from the lower to higher length scales has been carefully defined to bound the levels of effort required to ''bridge'' length scales. Information that needs to be generated by the different simulations has been specified …

B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.

Last summer, the author participated in a major, orchestrated, training event at Los Alamos designed to convey some of the key components of ISM to the workforce. The event was called Safety Days 1997. The objectives were to produce a genuine training event that was logical, focused, interactive, well-written, easy to follow, and that provided people with choices rather than a rigid script. This was the first effort at the Laboratory to organize a way for middle managers to become the safety trainers of their work teams. While upper management supported the concept and product, many were satisfied with the notion of simply creating a time for workers to discuss safety concerns. This paper considers the context of Safety Days 1997, how the training was received, the response to that training, and recommendations for Safety Days 1998.

Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.

There does not appear to be any obvious way to accelerate neutrons, polarized or otherwise, to high energies by themselves. To investigate the behavior of polarized neutrons the authors therefore have to obtain them by accelerating them as components of heavier nuclei, and then sorting out the contribution of the neutrons in the analysis of the reactions produced by the heavy ion beams. The best neutron carriers for this purpose are probably {sup 3}He nuclei and deuterons. A polarized deuteron is primarily a combination of a proton and a neutron with their spins pointing in the same direction; in the {sup 3}He nucleus the spins of the two protons are opposite and the net spin (and magnetic moment) is almost the same as that of a free neutron. Polarized ions other than protons may be accelerated, stored and collided in a ring such as RHIC provided the techniques proposed for polarized proton operation can be adapted (or replaced by other strategies) for these ions. To accelerate polarized particles in a ring, one must make provisions for overcoming the depolarizing resonances that occur at certain energies. These resonances arise when the spin tune (ratio of spin precession frequency to orbit frequency) …

Routine radiological surveys are part of near-facility environmental monitoring, which monitors and helps direct the reduction of the radiological areas at the Hanford Site. The routine radiological surveys are performed by the Southern Area Remediation Support Group and the Site Support Services Radiological Control Group as directed by Environmental Monitoring and Investigations. The surveys performed have included inactive waste sites; outdoor radiological control areas; tank farm perimeters and associated diversion boxes, lift stations, and vent stations; perimeters of active or uncovered waste sites such as burial grounds, retention basins, ponds, process trenches, and ditches; underground pipelines; and road and rail surfaces. This report provides a summary of the radiological surveys performed in support of near-facility environmental monitoring at the Hanford Site during the first quarter 1998. The survey results and the status of actions required are also discussed. A waste site survey schedule, Routine Environmental Monitoring Schedule, Calendar year 1998, HNF-SP-0098-9, was developed by Environmental Monitoring and Investigations working with the Southern Area Remediation Support Group and the Site Support Services Radiological Control Group. Environmental Monitoring and Investigations reviews the radiological survey reports and files a copy for historical purposes and reference. Radiological conditions are tracked and trends noted. All …

Uranium metal reacts actively with water to produce uranium oxide and hydrogen gas, and radiolysis of water also produces hydrogen in fuel containers. These fuel reactivities increase the potential for over pressurization and pyrophoric events during storage. Flow rate calculations were undertaken to examine the problem of the release of water trapped in subsurface voids during the vacuum drying for damaged fuel. To calculate the flow rates of the water vapor, five flow models are developed based on the kinetic theory of gases. The difference between the vapor pressure and the operating pressure provides the driving force for crevice water removal. Gas flow is divided into three types: viscous flow, molecular flow, and slip flow in the transition range. These calculations were focused on assessing that measured moisture release from the whole element drying studies currently in progress includes any water that may be trapped in subsurface voids.

Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.

Although the linear collider is ultimately capable of higher energies, a circular e{sup +}e{sup {minus}} collider installed in the large tunnels of a Very Large Hadron Collider (VLHC) has attractive features, including very light magnet system and unchallenging vacuum requirements. An ep collider, built either in the 3 TeV booster or the large tunnel, could extend the HERA program beyond {radical}s {approximately} 1 TeV. Both machines could perhaps use the same rf system, first in the booster tunnel and then as part of the large collider.