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Micelle-derived catalysts for extended Schulz-Flory. Technical progress report, October 1, 1986--December 31, 1986
The objective of this program is to develop a synthesis gas conversion catalyst with higher selectivity to liquid fuels, while maintaining catalytic activity and stability at least equivalent relative to state-of-the-art precipitated iron catalysts. Hydrocarbon cutoff hypothesis and developmental needs for a ruthenium catalyst with low light ends selectivity were investigated during this quarter. Hydrocarbon product distribution was Anderson-Schulz-Flory up to a carbon number of 250 and cutoff did not occur with a titania-supported catalyst containing ruthenium particles smaller than 20{Angstrom}. It was found that an alumina-supported catalyst with 1% (by weight) ruthenium in the form of 50{Angstrom} to 100{Angstrom} metal particles was initially about half as active (by catalyst volume) and made one quarter of the amount of C{sub 1}{minus}C{sub 4} light end products relative to the Sasol precipitated iron catalyst.
Date:
December 31, 1986
Creator:
Abrevaya, H.
Object Type:
Report
System:
The UNT Digital Library
Finite Temperature Instability for Compactification
We consider finite temperature effects upon theories with extra dimensions compactified via vacuum stress energy (Casimir) effects. For sufficiently high temperature, a static configuration for the internal space is impossible. At somewhat lower temperatures, there is an instability due to thermal fluctuations of radius of the compact dimensions. For both cases, the Universe can evolve to a de Sitter-like expansion of all dimensions. Stability to late times constrains the initial entropy of the universe. 28 refs., 1 fig., 2 tabs.
Date:
March 1, 1986
Creator:
Accetta, F. S. & Kolb, E. W.
Object Type:
Report
System:
The UNT Digital Library
Stable Compactifications
We show that compactifications of theories with extra dimensions are unstable if due to monopole configurations of an antisymmetric tensor field balanced against one-loop Casimir corrections. In the case of ten dimensional supergravity, it is possible, at least for a portion of the phase space, to achieve a stable compactification without fine-tuning by including the contribution of fermionic condensates to the monopole configurations. 23 refs., 2 figs.
Date:
March 1, 1986
Creator:
Accetta, F. S.; Gleiser, M.; Holman, R. & Kolb, E. W.
Object Type:
Report
System:
The UNT Digital Library
Thermodynamics of higher dimensional black holes
We discuss the thermodynamics of higher dimensional black holes with particular emphasis on a new class of spinning black holes which, due to the increased number of Casimir invariants, have additional spin degrees of freedom. In suitable limits, analytic solutions in arbitrary dimensions are presented for their temperature, entropy, and specific heat. In 5 + 1 and 9 + 1 dimensions, more general forms for these quantities are given. It is shown that the specific heat for a higher dimensional black hole is negative definite if it has only one non-zero spin parameter, regardless of the value of this parameter. We also consider equilibrium configurations with both massless particles and massive string modes. 16 refs., 3 figs.
Date:
May 1, 1986
Creator:
Accetta, F.S. & Gleiser, M.
Object Type:
Report
System:
The UNT Digital Library
Feasibility assessment of copper-base waste package container materials in a tuff repository
This report discussed progress made during the second year of a two-year study on the feasibility of using copper or a copper-base alloy as a container material for a waste package in a potential repository in tuff rock at the Yucca Mountain site in Nevada. Corrosion testing in potentially corrosive irradiated environments received emphasis during the feasibility study. Results of experiments to evaluate the effect of a radiation field on the uniform corrosion rate of the copper-base materials in repository-relevant aqueous environments are given as well as results of an electrochemical study of the copper-base materials in normal and concentrated J-13 water. Results of tests on the irradiation of J-13 water and on the subsequent formation of hydrogen peroxide are given. A theoretical study was initiated to predict the long-term corrosion behavior of copper in the repository. Tests were conducted to determine whether copper would adversely affect release rates of radionuclides to the environment because of degradation of the Zircaloy cladding. A manufacturing survey to determine the feasibility of producing copper containers utilizing existing equipment and processes was completed. The cost and availability of copper was also evaluated and predicted to the year 2000. Results of this feasibility assessment are …
Date:
September 30, 1986
Creator:
Acton, C. F. & McCright, R. D.
Object Type:
Report
System:
The UNT Digital Library
Defect fractions for fissile and fertile TRISO-coated fuel
High quality TRISCO-coated UCO and ThO{sub 2} particles with reference MHTGR dimensions were produced in a coating campaign in August and September 1986 for irradiation tests. The heavy metal contamination and the defect levels were below the limits established for the MHTGR fuel. Over 9 kg of uranium in UCO and 30 kg of thorium in ThO{sub 2} were TRISCO-coated in 4 fissile and 3 fertile batches in the 240mm Development Coater. These coated fuel particles will be used to produce fuel rods for testing in the irradiation validation tests to be conducted in capsules HRB-19, -20 and -21 on the DOE Fuel and Fission Product Technology Program. 3 refs., 6 figs., 6 tabs.
Date:
September 1, 1986
Creator:
Adams, C.C.
Object Type:
Report
System:
The UNT Digital Library
Analyzing powers and proton spin transfer coefficients in the elastic scattering of 800 MeV polarized protons from an L-type polarized deuteron target at small momentum transfers
Analyzing powers and spin transfer coefficients which describe the elastic scattering of polarized protons from a polarized deuteron target have been measured. The energy of the proton beam was 800 MeV and data were taken at laboratory scattering angles of 7, 11, 14, and 16.5 degrees. One analyzing power was also measured at 180 degrees. Three linearly independent orientations of the beam polarization were used and the target was polarized parallel and antiparallel to the direction of the beam momentum. The data were taken with the high resolution spectrometer at the Los Alamos Meson Physics Facility (experiment 685). The results are compared with multiple scattering predictions based on Dirac representations of the nucleon-nucleon scattering matrices. 27 refs., 28 figs., 4 tabs.
Date:
October 1, 1986
Creator:
Adams, D.L.
Object Type:
Report
System:
The UNT Digital Library
Tracer Developments: Results of Experimental Studies
Tracers can be used to monitor the movement of groundwaters and geothermal fluids and they can be used as a reference to quantify changes in fluid chemistry as a result of injection. Despite their potential importance to the geothermal operator, very few tracers are presently available and of those that are, little is known about their stability or behavior at the elevated temperatures that typify resources capable of electric power generation. During the past two years the University of Utah Research Institute has been involved in tracer research and testing, largely through the DOE Injection Research Program. The purpose of this paper is to summarize the results of these laboratory and field investigations.
Date:
January 21, 1986
Creator:
Adams, M. C.; Ahn, J. H.; Bentley, H.; Moore, J. N. & Veggeberg, S.
Object Type:
Article
System:
The UNT Digital Library
Subsurface marker emplacement test plan
Current plans propose placing subsurface markers within protective barriers to deter potential human intrusion into disposed radioactive wastes. The subsurface markers would provide warning to the digging intruder should surface markers be removed, destroyed, or ignored. This plan sets forth procedures for testing the survivability of the subsurface markers during construction of the barrier. After the tests described herein are concluded, a decision can be made as to whether subsurface markers will require protection during barrier construction. If protection is required, additional tests will be needed to test the effectiveness of various protective approaches.
Date:
May 30, 1986
Creator:
Adams, M. R. & Carlson, R. A.
Object Type:
Report
System:
The UNT Digital Library
The Paducah Post (Paducah, Tex.), Vol. 80, No. 1, Ed. 1 Thursday, February 27, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
February 27, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 2, Ed. 1 Thursday, March 6, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
March 6, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 3, Ed. 1 Thursday, March 13, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
March 13, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 4, Ed. 1 Thursday, March 20, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
March 20, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 5, Ed. 1 Thursday, March 27, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
March 27, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 6, Ed. 1 Thursday, April 3, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
April 3, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 7, Ed. 1 Thursday, April 10, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
April 10, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 8, Ed. 1 Thursday, April 17, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
April 17, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 9, Ed. 1 Thursday, April 24, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
April 24, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 10, Ed. 1 Thursday, May 1, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
May 1, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 11, Ed. 1 Thursday, May 8, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
May 8, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 12, Ed. 1 Thursday, May 15, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
May 15, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 13, Ed. 1 Thursday, May 22, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
May 22, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 14, Ed. 1 Thursday, May 29, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
May 29, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History
The Paducah Post (Paducah, Tex.), Vol. 80, No. 15, Ed. 1 Thursday, June 5, 1986
Weekly newspaper from Paducah, Texas that includes local, state, and national news along with advertising.
Date:
June 5, 1986
Creator:
Adams, Patty
Object Type:
Newspaper
System:
The Portal to Texas History