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Atlas of Irradiated Fuel Structures

Description: Compilation of photographs, photomicrograph mosaics of fuel element cross-sections, and autoradiographs of irradiated fuels. These images were colleted to understand in-reactor fuel kinetics and illustrate structural changes that occur during irradiation of ceramic fuel elements.
Date: October 1966
Creator: Horn, G. R.
Partner: UNT Libraries Government Documents Department

Cesium-137 Research Irradiator

Description: Abstract: A 12,000 curie cesium-137 research irradiator has been designed and installed on the Georgia Tech campus. The evaluation of the physical characteristics of the irradiator has been completed.
Date: April 20, 1961
Creator: Carter, R. W.; Palmer, R. C. & Willis, W. V.
Partner: UNT Libraries Government Documents Department

The H-3 Irradiation Experiment: Irradiation of Experimental Gas Cooled Reactor Graphite, Number 2

Description: Report documenting "the long-term irradiation stability of the graphite used as the moderator in the Experimental Gas Cooled Reactor (EGCR) at Oak Ridge" (p. 1) by irradiating capsules at the General Electric Test Reactor. This includes the design and construction of the experiment, experiment procedures, and results of irradiation. Appendices begin on page 83.
Date: September 1964
Creator: Helm, J. W.
Partner: UNT Libraries Government Documents Department

Biochemically Induced Avoidance of Saccharin: a Parametric Study

Description: The purpose of this study was to examine some of the parameters of saccharin avoidance relating to varying dose sizes of the colloidal suspension, Proferrin. Since studies reveal additive effects when irradiation and Proferrin are used together, it was hypothesized that different degrees of avoidance would be obtained by using various dose levels.
Date: January 1971
Creator: Stowe, Judith E.
Partner: UNT Libraries

Nano-crystallization Inhibition in 5 Nm Ru Film Diffusion Barriers for Advanced Cu-interconnect

Description: As the semiconductor industries are moving beyond 22 nm node technology, the currently used stacked Ta/TaN diffusion barrier including a copper seed will be unable to fulfill the requirements for the future technologies. Due to its low resistivity and ability to perform galvanic copper fill without a seed layer, ruthenium (Ru) has emerged as a potential copper diffusion barrier. However, its crystallization and columnar nanostructure have been the main cause of barrier failures even at low processing temperatures (300 oC -350 oC). In this study, we have proposed and evaluated three different strategies to improve the performance of the ultrathin Ru film as a diffusion barrier for copper. The first study focused on shallow surface plasma irradiation/amorphization and nitridation of 5 nm Ru films. Systematic studies of amorphization and nitrogen incorporation versus sample bias were performed. XPS, XRD and RBS were used to determine the physico-chemical, crystallization and barrier efficiency of the plasma modified Ru barrier. The nitrogen plasma surface irradiation of Ru films at substrate bias voltage of -350 V showed an improved barrier performance up to 400 oC annealing temperatures. The barrier barely started failing at 450 oC due mainly to nitrogen instability. The second study involved only amorphization of the Ru thin film without any nitrogen incorporation. A low energy ion beam irradiation/amorphization on Ru thin film was carried out by using 60 KeV carbon ions with different irradiation doses. The irradiation energy was chosen high enough so that the irradiation ions pass through the whole Ru thin film and stop in the SiO2/Si support substrate. The C-ion fluence of 5×1016 atoms/cm2 at 60 KeV made the Ru film near amorphous without changing its composition. XRD and RBS were used to determine the relationship between crystallization and barrier efficiency of the carbon irradiated Ru barrier. The amorphized ...
Date: December 2013
Creator: Sharma, Bed P.
Partner: UNT Libraries

STUDY OF PION-PION SCATTERING FROM THE REACTION $pi$$sup +$ + p $Yields$ $pi$$sup +$ + $pi$$sup +$ + n AT 1.25 AND 1.75 Bev/c (thesis)

Description: The equipment and procedure used in measuring the distribution of energy and angle of recoil of neutrons from the reaction pi /sup +/ + p yields pi / sup +/ + pi /sup +/ + n for incident pion mome nta of 1.25 and 1.75 Bev/c are explained. Utilization of the plastic scintillator detectors is given particular attention. Data on the cross section for pion-pion scattering are presented and analyzed. (22 references.) (D.C.W.)
Date: October 31, 1962
Creator: Auerbach, L.B.
Partner: UNT Libraries Government Documents Department

Division of Reactor Development, Research and Development Programs Quarterly Progress Report: April - June 1964

Description: The programs sponsored by the Division of Reactor Development at Hanford include studies on basic properties of fuel materials and fabrication methods, physics, chemical processing of reactor fuels and radioactive waste, material development, irradiation effects on materials, fuel cycle analysis and advanced concepts, instrumentation, and nondestructive testing techniques. The results of these programs are broadly applicable to the Civilian Application Program.
Date: November 1964
Creator: Pacific Northwest Laboratory
Partner: UNT Libraries Government Documents Department

Thermal Conductivity of UO2

Description: Report discussing the thermal conductivity of uranium dioxide. The first part of the report includes the thermal effects on the substance's physical form, while the second part describes the experimental details.
Date: September 1962
Creator: Daniel, J. L. 1924-; Matolich, J., Jr. & Deem, H. W.
Partner: UNT Libraries Government Documents Department

The Effect of Reactor Irradiation on the Stress Strain Curve of Copper

Description: The following report describes the method of a crystal of 99.99% pure copper grown under high vacuum and cut into two specimens used to test the effects of reactor irradiation on copper. Provided is a map of the results that show the difference between the unirradiated and irradiated copper samples through the process of stress strain.
Date: 1951
Creator: Blewitt, T. H. & Coltman, R. R.
Partner: UNT Libraries Government Documents Department

Preparation of Radioiron of High Specific Activity

Description: From abstract: "A comparison has been made of methods for producing Fe59 of higher specific activity than that obtainable by irradiating natural iron in the Clinton pile. Five processes have been considered, (1) irradiation of natural iron in the Hanford piles, (2) irradiation of enriched F58 in the Clinton and Hanford piles, (3) Szilard-Chalmers enrichment using ferrocyanides in the Clinton pile, (4) collection of recoils in a phase separable from the bulk of the iron, and (5) the Co59 (n,p) Fe59 reaction in the Clinton and Hanford piles."
Date: January 28, 1948
Creator: Swartout, J. A. & Rice, H. M.
Partner: UNT Libraries Government Documents Department

An investigation of aircraft heaters XXX : nocturnal irradiation as a function of altitude and its use in determination of heat requirements of aircraft

Description: Report presenting generalized radiation charts for the calculation of the irradiation from water vapor, carbon dioxide, ozone, and the earth in terms of appropriate parameters. Nocturnal irradiation was found to decrease greatly as a function of altitude and meteorological conditions.
Date: January 1949
Creator: Boelter, L. M. K.; Poppendiek, H.; Young, G. & Andersen, J. R.
Partner: UNT Libraries Government Documents Department

Construction report: GA17-7 (P13N) irradiation capsule

Description: A detailed description of the GA17-7 (P13N) capsule is presented, including fuel sample weights and dimensions, dimensions of capsule components, and piggyback (secondary) experiment locations. The report is intended as a guide for operational thermal analysis, as a reference for post-irradiation examination, and as a reference for future capsule design. (auth)
Date: October 1, 1972
Creator: Steibel, J.S. & Czech, B.A.
Partner: UNT Libraries Government Documents Department

ATR NATIONAL SCIENTIFIC USER FACILITY INSTRUMENTATION ENHANCEMENT EFFORTS

Description: A key component of the Advanced Test Reactor (ATR) National Scientific User Facility (NSUF) effort is to enhance instrumentation techniques available to users conducting irradiation tests in this unique facility. In particular, development of sensors capable of providing ‘real-time’ measurements of key irradiation parameters is emphasized because of their potential to offer increased fidelity data and reduced post-test examination costs. This paper describes the strategy for identifying new instrumentation needed for ATR irradiations and the program underway to develop and evaluate new sensors to address these needs. Accomplishments from this program are illustrated by describing several new sensors now available to users of the ATR NSUF. In addition, progress is reported on current research efforts to provide users improved in-pile instrumentation.
Date: April 1, 2009
Creator: Rempe, Joy L. & Meyer, Mitchell K.
Partner: UNT Libraries Government Documents Department