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Results of the metallographic examination of the Ta crucible used in the M. S. E. runs

Description: A cross section from a Ta crucible used in numerous Molten Salt Extraction (MSE) runs was submitted to metallography to determine the soundness of the crucible wall, type of Pu attack, depth of wall penetration by the Pu and general microstructure. The crucible contained molten Pu and Am, with CaCl{sub 2}, KCl and PuCl{sub 3} salts ran at temperatures of 750{degree}C to 900{degree}C for approximately 10 to 12 hours. This report documents the findings of this study.
Date: October 22, 1990
Creator: Furr, J.S.
Partner: UNT Libraries Government Documents Department
open access

The role of purine degradation in methane biosynthesis and energy production in Methanococcus vannielii

Description: Research continues on the role of purine degradation in methane biosynthesis and energy production in Methanococcus vannielii. This report summarizes current progress of the research. Topics include: A survey of other methanogens for the purine degradation pathway; isolate and characterize the enzyme and products of formiminoglycine cleavage; ascertain the fate of glycine from the formiminoglycine cleavage; elucidate the route of incorporation of the formyl moiety of formiminoglycine into metha… more
Date: October 22, 1990
Creator: DeMoll, E.
Partner: UNT Libraries Government Documents Department
open access

Dispersion calculations for non-radiological hazardous chemical emissions from the Defense Waste Processing Facility and related activities

Description: The Environmental Protection Agency's (EPA) Industrial Source Complex -- Short Term (ISCST) air dispersion model was used to examine potential atmospheric impacts of routine benzene and mercury emissions from the Defense Waste Processing Facility (DWPF), In-Tank Precipitation (ITP) facilities, and the Saltstone Facility. The highest model estimated 8-hour average ground-level benzene concentrations were found to occur in the immediate vicinity of the ITP filter/stripper building (241-96H). Subs… more
Date: October 22, 1990
Creator: Hunter, C.H.
Partner: UNT Libraries Government Documents Department
open access

Ground-based testing of space nuclear power plants

Description: Small nuclear power plants for space applications are evaluated according to their testability in this two part report. The first part introduces the issues involved in testing these power plants. Some of the concerns include oxygen embrittlement of critical components, the test environment, the effects of a vacuum environment on materials, the practically of racing an activated test chamber, and possible testing alternative the SEHPTR, king develop at the Idaho National Engineering Laboratory.… more
Date: October 22, 1990
Creator: McDonald, T.G.
Partner: UNT Libraries Government Documents Department
open access

(Chemically vapor deposited diamond films)

Description: The NATO-ASI on Diamond and Diamond-Like Films and Coatings'' was an opportunity for us to learn the latest research results from ongoing programs in the leading laboratories of the world and relate them to our work. Specific examples are given in the comprehensive report which follows. The meeting format provided an ideal environment to meet and interact with our international counterparts. It is clear that our studies are well regarded, and that we have established an excellent reputation in … more
Date: September 22, 1990
Creator: Clausing, R.E. & Heatherly, L. Jr.
Partner: UNT Libraries Government Documents Department
open access

Beam-beam deflection and signature curves for elliptic beams

Description: In this note we will present closed expressions for the beam-beam deflection angle for arbitrary elliptic beams including tilt. From these expressions signature curves, i.e., systematic deviations from the round beam deflection curve due to ellipticity or tilt are derived. In the course of the presentation we will prove that it is generally impossible to infer individual beam sizes from beam-beam deflection scans. 3 refs., 2 figs.
Date: October 22, 1990
Creator: Ziemann, V.
Partner: UNT Libraries Government Documents Department
open access

(Safety and reliability of nuclear power plant technology)

Description: The traveler attended the 16th MPA Seminar on the Safety and Reliability of Plant Technology with Special Emphasis on Nuclear Technology. The objective of the trip was to gather information and data that could prove useful to the US Nuclear Regulatory Commission (USNRC) sponsored Heavy-Section Steel Irradiation (HSSI) and Heavy-Section Steel Technology (HSST) Programs and to present a paper entitled, Effects of Irradiation on Initiation and Crack-Arrest Toughness of Two High-Copper Welds and on… more
Date: October 22, 1990
Creator: Dickson, T.L.
Partner: UNT Libraries Government Documents Department
open access

Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes

Description: While developing dry sorbent duct injection flue gas desulfurization processes may offer significant improvement in capital cost and process simplicity compared to wet scrubbing systems, the economics of this technology can be improved significantly by an improvement in sorbent utilization. While a general understanding of the mechanism by which the sorbents operate is known, a much more detailed knowledge of reaction rate-controlling phenomena, the role of inherent reactivity, and mass transfe… more
Date: August 22, 1990
Partner: UNT Libraries Government Documents Department
open access

Physics study of the application of an IFEL (Induction Free-Electron Laser) to CIT (Compact Ignition Tokamak)

Description: The ECH system requirements on CIT might be met by microwaves generated by an induction free-electron laser (IFEL). Design studies have assumed that the system is windowless, thus eliminating one of the most highly stressed components of the ECH system. The trade-off for this advantage is that the IFEL is exposed to tritium diffusing from CIT. As reported in the attached appendix, we have investigated the use of cryopumping to control the tritium diffusion to the IFEL. With one to three pumping… more
Date: May 22, 1990
Creator: Hooper, E.B. (ed.)
Partner: UNT Libraries Government Documents Department
open access

Sector 30 collimator radiation

Description: The collimators at Sector 30 of the SLAC accelerator are designed to scrape off a significant fraction (e.g., {approximately}20%) of the SLC beam. The electromagnetic cascade shower that develops in the collimator, and in the scraper and waveguide downbeam, leads to very high radiation exposures of TV cameras (and other devices) located nearby. The collimator (point) source accounts for one-third of the dose and is best shielded by extending the radius of the copper scraper. Radiation from the … more
Date: February 22, 1990
Creator: Namito, Y. (Ship Research Inst., Tokyo (Japan)); Nelson, W. R. & Benson, E.
Partner: UNT Libraries Government Documents Department
open access

Technical Appendix to Cryogenic Pressure Vessels

Description: The 20,000 gls. Liquid Argon dewar stores up to 15,000 gls. of high purity (<1.0 ppm O{sub 2}, 0.999995) LAr for use in the Liquid Argon calorimeters of E740, the D0 collider detector, at elevation 707-feet. The dewar provides for the total detector volume of 11,000 gls and a 4,000 gls. storage inventory. The large gas volume ({ge}5,000 gls.) serves operational needs and guards against overfill concerns. The LAr dewar functions in two modes: (1) low pressure (16 psi relief) storage, and liqu… more
Date: February 22, 1990
Creator: Mulholland, G. T. & Rucinski, R. A
Partner: UNT Libraries Government Documents Department
open access

Final report for Allied-Signal Aerospace Company, Kansas City Division on protective glove permeation analysis

Description: We conducted 25 separate glove fabric permeation studies during this project. The permeations were carried out in the small (1 inch) glass ASTM cell. One other permeation study was carded out with a large (two inch) modified ASTM cell for comparison with the small cell results. We also compared the LLNL procedure from both large and small cells with the standard ASTM test procedure which uses a liquid solution on the breakthrough side of the fabric (the liquid is then sampled on a periodic basi… more
Date: June 22, 1990
Creator: Swearengen, P. M.; Johnson, J. S. & Priante, S. J.
Partner: UNT Libraries Government Documents Department
open access

Measurements of the Fermilab 200 MeV transfer line quadrupole magnets

Description: This report presents the results of measurements of two quadrupole magnets that are used in the 200 MeV transfer line. The measurements were performed to obtain data to evaluate the suitability of these magnets for use in a 400 MeV transfer line once the Linac Upgrade is complete. In order to provide a basis for comparison, data were obtained from Fermilab's Magnet Test Facility of measurements of magnets of similar size and strength that were built for the Loma Linda project. These Loma Linda … more
Date: March 22, 1990
Creator: Kroc, T.
Partner: UNT Libraries Government Documents Department
open access

A material model driver for DYNA3D

Description: This report describes a material model driver which has recently been implemented in the DYNA3D code. The material model driver allows plotting of the constitutive response predicted by a material model under a given load path. This capability is particularly useful when fitting complex material models to experimental data. The plotting capability of the material model driver facilitates comparison of the simulated material stress-strain behavior with actual material test results. 1 ref., 6 fig… more
Date: February 22, 1990
Creator: Hallquist, J.O. & Whirley, R.G.
Partner: UNT Libraries Government Documents Department
open access

A climatological description of the Savannah River Site

Description: This report provides a general climatological description of the Savannah River Site. The description provides both regional and local scale climatology. The regional climatology includes a general regional climatic description and presents information on occurrence frequencies of the severe meteorological phenomena that are important considerations in the design and siting of a facility. These phenomena include tornadoes, thunderstorms, hurricanes, and ice/snow storms. Occurrence probabilities… more
Date: May 22, 1990
Creator: Hunter, C.H.
Partner: UNT Libraries Government Documents Department
open access

A Rapid Relativistic Distorted Wave Approach for Calculating Cross Sections for Ionization of Highly Charged Ions

Description: The rapid relativistic distorted wave method of Zhang et al for excitation, which uses the atomic structure data of Sampson et al, has been extended to ionization. In this approach the same Dirac-Fock-Slater potential evaluated using a single mean configuration is used in calculating the orbitals of all electrons bound and free. Values for the cross sections Q for ionization of various ions have been calculated and generally good agreement is obtained with other recent relativistic calculations… more
Date: October 22, 1990
Creator: Zhang, Hong Lin & Sampson, D.H. (Pennsylvania State Univ., University Park, PA (USA). Dept. of Astronomy)
Partner: UNT Libraries Government Documents Department
open access

(Environmental impact of radionuclide release during the Kyshtym, Windscale, and Chernobyl accidents)

Description: The traveler attended the conference, Comparative Assessment of the Environmental Impact of Radionuclides Released During Three Major Nuclear Accidents: Kyshtym, Windscale, and Chernobyl and presented an invited paper giving a western perspective of the Kyshtym (Chelyabinsk-40) high-level waste explosion that took place in 1957. Papers of interest to several ORNL and DOE programs were presented. These covered the topics of accident source terms, atmospheric dispersion, resuspension, chemical an… more
Date: October 22, 1990
Creator: Trabalka, J.R.
Partner: UNT Libraries Government Documents Department
open access

Analysis of heat and mass transport processes near an emplaced nuclear waste canister; Final report

Description: A review has been performed of the models and experimental plans for evaluation of the spent fuel canister environment in a nuclear repository, e.g., the planned Yucca Mountain facilities. Special emphasis was placed on the relevance of the models and experiments to the 100 to 10,000 year prediction. The question was addressed whether one could justify testing in materials other than Yucca Mountain rock and obtain results in a relatively short time which would be relevant to the long time in Yu… more
Date: May 22, 1990
Creator: Keller, C.
Partner: UNT Libraries Government Documents Department
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