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50,353 Matching Results

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Effect of Core Corrosion Sample Assembly on HRT Critical Concentration (open access)

Effect of Core Corrosion Sample Assembly on HRT Critical Concentration

An estimate has been made of the critical fuel concentration in the HRT, taking into account the effect of the core corrosion sample assembly. The estimate is based on a number of previous calculations of critical concentration in an un-poisoned reactor and one calculation of critical concentration as a function of poison level. The makeup of the first core corrosion sample assembly was used in calculating equivalent neutron poisoning effects. Figure 1 shows the estimated critical concentration as a function of temperature with the corrosion sample assembly in place. At 280°C, the assembly raises the critical concentration by 0.6 g U-235/kg D2O. This effect is equivalent to a uniformly distributed poison equal to 4.1% of the fission cross section. The equivalent poison is greater at lower temperatures, where the uranium concentration is lower.
Date: July 18, 1957
Creator: Haubenreich, Paul N.
System: The UNT Digital Library
Nuclear Computations for HRE-3 Design : Equilibrium Results (open access)

Nuclear Computations for HRE-3 Design : Equilibrium Results

Various nuclear characteristics of two-region spherical homogeneous reactors have been computed in order to provide information for the design of HRE-3. Equilibrium isotope concentrations were established using an ORACLE code, and a two-group model was used to obtain critical concentrations and flux distributions. Breeding ratio is plotted as a function of reactor size, blanket thorium concentration, and other design and operating parameters, and the time required for a demonstration breeding is discussed. Tables of results, including neutron balances, are given for selected reactors. a number or relations are presented for estimating the effects of fission products, copper, corrosion products, H2O, and the core tank on breeding ratio.
Date: July 10, 1957
Creator: Rosenthal, M. W. & Fowler, T. B.
System: The UNT Digital Library
Radiation Level in the Stator Region of the HRT Fuel Circulation Pump (open access)

Radiation Level in the Stator Region of the HRT Fuel Circulation Pump

The gamma dose rate in the motor region of the HRT fuel circulation pump was measured with the pump scroll full of radioactive solution. Extrapolation of the data to the solution activity expected in the pump under normal operation gives a dose rate well below that which would result in excessive gas production in the stator can within the life of the pump. The above dose rate does not include the effects of fast neutrons from the fuel solution or of the general cell radiation level in the vicinity of the pump. It appears that the possibility of gas production in the stator from the cell background radiation is sufficiently great to warrant the installation of a shield around the outside of the motor end of the fuel circulating pump.
Date: July 3, 1957
Creator: Engel, J. R.
System: The UNT Digital Library
Thermal Stress Testing of SM-2 Fuel Elements : Final Report January 1, 1959 to July 1, 1960 (open access)

Thermal Stress Testing of SM-2 Fuel Elements : Final Report January 1, 1959 to July 1, 1960

Thermal stress testing was performed on portions of reactor fuel elements.
Date: September 20, 1960
Creator: Christenson, J. A. & Kortheuer, J. D.
System: The UNT Digital Library
Summary of Reactor Design Information from Three Years Operation of a Small PWR (open access)

Summary of Reactor Design Information from Three Years Operation of a Small PWR

Reactor design information obtained from three years' operation of a small pressurized water reactor, the SM-1 (formerly APPR-1), presented and discussed
Date: September 9, 1960
Creator: Gallagher, J. G.
System: The UNT Digital Library
Structural Testing of SM-2 Fuel Elements (open access)

Structural Testing of SM-2 Fuel Elements

Ability of the originally designed SM-2 stainless steel fuel elements, of both tungsten inert gas (TIG) and electrical resistance welded construction, to withstand static transverse pressure gradients of normal reactor operation was investigated
Date: September 29, 1960
Creator: Coleman, F. G., Jr. & Herbert, R. J.
System: The UNT Digital Library
SM-1 Research and Development Quarterly Report : April 1 to June 30, 1960 (open access)

SM-1 Research and Development Quarterly Report : April 1 to June 30, 1960

This report covers research conducted at the SM-1 and highlights progress made in plant water chemistry and health physics practices and progress on individual tasks and test are reported
Date: September 20, 1960
Creator: Bergman, C. A.
System: The UNT Digital Library
Nuclear Analysis of Various Spert-III Critical Experiments (open access)

Nuclear Analysis of Various Spert-III Critical Experiments

The calculational models employed in the nuclear analysis of the SM-2 were applied to various critical experiments performed upon the SPERT-III core
Date: April 27, 1961
Creator: Paluszkiewica, S.
System: The UNT Digital Library
Activity Build-Up Control by High pH Coolant : A Literature Survey (open access)

Activity Build-Up Control by High pH Coolant : A Literature Survey

A survey was made of unclassified literature dealing with the control of activity buildup in pressurized water reactors by high pH coolants
Date: January 23, 1961
Creator: Bergen, C. R.
System: The UNT Digital Library
Texas Turfgrass Research: 1990 (open access)

Texas Turfgrass Research: 1990

Consolidated progress report providing a summary of research conducted at the experiment station during the prior year related to grass varieties used as turf, including growth and development, turfgrass cultivars, environment, pests, and culture.
Date: June 1990
Creator: Texas Agricultural Experiment Station
System: The Portal to Texas History
Texas Turfgrass Research: 1987 (open access)

Texas Turfgrass Research: 1987

Consolidated progress report providing a summary of research conducted at the experiment station during the prior year related to grass varieties used as turf, including growth and development, turfgrass cultivars, environment, pests, and culture.
Date: June 1989
Creator: Texas Agricultural Experiment Station
System: The Portal to Texas History
Texas Turfgrass Research: 1979-80 (open access)

Texas Turfgrass Research: 1979-80

Consolidated progress report providing a summary of research conducted at the experiment station during the prior year related to grass varieties used as turf, including updates on research, studies on turfgrasses, cultivar characterizations, fungicides, and herbicides.
Date: January 1981
Creator: Texas Agricultural Experiment Station
System: The Portal to Texas History
Texas Turfgrass Research: 1991 (open access)

Texas Turfgrass Research: 1991

Consolidated progress report providing a summary of research conducted at the experiment station during the prior year related to grass varieties used as turf, including growth and development, turfgrass cultivars, environment, pests, and culture.
Date: June 1992
Creator: Texas Agricultural Experiment Station
System: The Portal to Texas History
Texas Electronic Visit Verification System Availability Report: December 2021 (open access)

Texas Electronic Visit Verification System Availability Report: December 2021

Monthly report documenting times that electronic visit verification (EVV) systems -- required to document certain medicaid service visits -- were malfunctioning or not accessible in the state of Texas, due to maintenance or other issues.
Date: December 2021
Creator: Texas Health and Human Services Commission
System: The Portal to Texas History
Texas School and Appraisal Districts' Property Value Study: Preliminary Report, 2000 (open access)

Texas School and Appraisal Districts' Property Value Study: Preliminary Report, 2000

Preliminary findings of a study conducted by the Texas Comptroller's Office to "determine the total taxable value of all property in each school district" (Government Code Section 403.302), to inform the distribution of state funding for public education.
Date: March 2001
Creator: Texas. Comptroller's Office.
System: The Portal to Texas History
Texas School and Appraisal Districts' Property Value Study: Preliminary Report, 1994 (open access)

Texas School and Appraisal Districts' Property Value Study: Preliminary Report, 1994

Preliminary findings of a study conducted by the Texas Comptroller's Office to "determine the total taxable value of all property in each school district" (Government Code Section 403.302), to inform the distribution of state funding for public education.
Date: January 1995
Creator: Texas. Comptroller's Office.
System: The Portal to Texas History
Analysis of Annual Reports of Licensees for the Year 1970 (open access)

Analysis of Annual Reports of Licensees for the Year 1970

Report providing an overview of data related to bank loans in Texas, broken down by various aspects of the loan types and the borrowers.
Date: 1970
Creator: Texas. Office of Consumer Credit Commissioner.
System: The Portal to Texas History
Analysis of Annual Reports of Licensees for the years 1970-1975 (open access)

Analysis of Annual Reports of Licensees for the years 1970-1975

Report providing an overview of data related to bank loans in Texas, broken down by various aspects of the loan types and the borrowers.
Date: 1975
Creator: Texas. Office of Consumer Credit Commissioner.
System: The Portal to Texas History
Analysis of Annual Reports of Licensees for the Years 1972-1973 (open access)

Analysis of Annual Reports of Licensees for the Years 1972-1973

Report providing an overview of data related to bank loans in Texas, broken down by various aspects of the loan types and the borrowers.
Date: 1973
Creator: Texas. Office of Consumer Credit Commissioner.
System: The Portal to Texas History
Statistical Supplement to the Texas College and University System Coordinating Board Annual Report: 1984 (open access)

Statistical Supplement to the Texas College and University System Coordinating Board Annual Report: 1984

Statistical report about various data collected on Texas state colleges and universities during fiscal year 198Y such as enrollment, faculty, credit hours, facilities, state appropriations, and student loans.
Date: January 1985
Creator: Coordinating Board, Texas College and University System
System: The Portal to Texas History
Statistical Supplement to the Texas College and University System Coordinating Board Annual Report: 1983 (open access)

Statistical Supplement to the Texas College and University System Coordinating Board Annual Report: 1983

Statistical report about various data collected on Texas state colleges and universities during fiscal year 198Y such as enrollment, faculty, credit hours, facilities, state appropriations, and student loans.
Date: January 1984
Creator: Coordinating Board, Texas College and University System
System: The Portal to Texas History
Statistical Supplement to the Texas Higher Education Coordinating Board Annual Report: 1987 (open access)

Statistical Supplement to the Texas Higher Education Coordinating Board Annual Report: 1987

Statistical report about various data collected on Texas state colleges and universities during fiscal year 198Y such as enrollment, faculty, credit hours, facilities, state appropriations, and student loans.
Date: 1987~
Creator: Texas Higher Education Coordinating Board
System: The Portal to Texas History
Habitat Development Field Investigations, Windmill Point Marsh Development Site, James River, Virginia: Appendix A (open access)

Habitat Development Field Investigations, Windmill Point Marsh Development Site, James River, Virginia: Appendix A

Appendix containing an assessment of vegetation on a dredged material island located near Windmill Point in the freshwater tidal reach of the James River. It accompanies a report on habitat development field investigations of the Windmill Point Marsh Development Site, James River, Virginia.
Date: August 1978
Creator: Silberhorn, G.M. & Barnard, T.A. Jr.
System: The UNT Digital Library
Strengthening and Democratizing the U.S. Artificial Intelligence Innovation Ecosystem: An Implementation Plan for a National Artificial Intelligence Research Resource (open access)

Strengthening and Democratizing the U.S. Artificial Intelligence Innovation Ecosystem: An Implementation Plan for a National Artificial Intelligence Research Resource

This is the final report of the National AI Research Resource (NAIRR) task force, where they present a roadmap and implementation plan for a national cyberinfrastructure aimed at overcoming the access divide, reaping the benefits of greater brain power and more diverse perspectives and experiences applied to developing the future of AI technology and its role in society. The NAIRR also took the opportunity during their research to set the standards for responsible AI research practices and governance processes that uphold their priority to develop and harness their researched technologies in a manner that reinforces national democratic values and Americans' personal freedoms.
Date: January 2023
Creator: Knowles, Tess Deblanc; Parashar, Manish; Parker, Lynne; Gianchandani, Erwin; Braga, Daniela; Dean, Mark E. et al.
System: The UNT Digital Library