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CALCULATION OF THE REQUIREMENTS FOR OPERATION OF REFRACTORY-METAL COMPONENTS AT HIGH TEMPERATURE IN VACUUM
Equations based on kinetic theory relate the contamination of refractory metals in vacuum to the appropriate variables. Several examples are given for which the allowable system pressures are calculated. The examples illustrate the effect of varying several parameters. The importance of the sticking factor for active gases on hot refractory metals and its effect on the system design are discussed. The data for estimating the sticking factor for O/sub 2/ on Nb are given, along with some estimated values. Experimental data on the composition and rates of outgassing of ultrahigh-vacuum systems and their importance in system design are discussed. Several methods of reducing contamination rates and the relative ease and effectiveness of these methods are presented. It was concluded that tests of 1000 hr or longer will probably require system pressures of between 10/sup -9/ and 10/sup -6/ torr, the particular pressure depending upon the residual gas composition, test duration, allowable contamination level, and the other variables discussed. Since the most important source of contamination in a properly designed ultrahigh-vacuum system is the outgassing process, bakeable systems should be designed to operate with walls as cool as practical, and to have a minimum of surface area and outgassing materials inside. …
Date:
September 18, 1962
Creator:
Clausing, R.E.
Object Type:
Report
System:
The UNT Digital Library
RADIOISOTOPE AND RADIATION APPLICATIONS. Quarterly Progress Report
The study of the mechanism of free-radical formation and decay in polymeric materials was continued and extended to include an investigation of the potential application of this information to the development of novel graft copolymers. The study of postirradiation grafting techniques employing both peroxide initiation and direct grafting was continued. In addition, the effect of molecular weight on site formation was further investigated. Licenses and license applications for approximately 300 by-product material licenses were reviewed to obtain information on environmental conditions of source usage. The feasibility of testing sealed-source response to normal environments by accelerated test procedures was studied. Indications are that the approach will probably not be applicable to either vibration or abrasion stresses but may be for corrosion stresses. (auth)
Date:
October 18, 1962
Creator:
Sunderman, D.N., ed.
Object Type:
Report
System:
The UNT Digital Library
Calculation and Measurement of the Transient Temperature in a Low- Enrichment UO$sub 2$ Fuel Rod During Large Power Excursions
The results of Spert I in-pile transient tests of a rodtype, low- enrichment UO/sub 2/ fuel element are presented. The tests were performed to investigate the possibility of damage to such long thermal-time-constant fuel rods when subjected to short-period power excursions, and to test the effectiveness of an instrumentation technique for measurement of UO/sub 2/ fuel temperatures within the rods. In an initial series of power excursion tests, in which the range of reactor periods was from approximately 1 sec to 7.5 msec, simultaneous measurements were made of the transient temperature at the center of the fuel rod and at the outer cladding surface. Fuel rod rupture occurred during the exponential rise of the 7.5-msec excursion. Similar short-period tests performed on a second fuel rod contain ing no internal thermocouples did not result in cladding failure, supporting the postulation that rupture of the first rod was caused by waterlogging of the UO/sub 2/ as a result of the cladding penetrations made for installation of the internal thermocouples. Calculations of the transient temperature distribution in the fuel rod were made, and the results are found to be in good agreement with the experimental data obtained on the central-UO/sub 2/ and cladding-surface …
Date:
May 18, 1962
Creator:
Houghtaling, J. E.; Quigley, T. M. & Spano, A. H.
Object Type:
Report
System:
The UNT Digital Library
THE EXPERIMENTAL DESIGN FOR BeO IRAADIATION EXPERIMENTS ORNL 41-8 AND ORNL 41-9
The experimental plan for irradiating BeO pellets in Experiments ORNL 41- 8 and ORNL 41-9 was chosen in accordance with the principles of experimental design. The design is known by statisticians as a 2/sup 5/ factorial experiment confound'' in six replications. Five variables---size, density, grain size, temperature and time--are controlled at two levels to form the basic 2i factorial experiment. The sixth variable, neutron flux, is introduced by confounding on higher-order interactions. An explanation is presented in nontechnical language the means by which the aims of the experimenters and the physical conditions affecting the experiment were utilized in constructing the experimental design. (auth)
Date:
July 18, 1962
Creator:
Gardiner, D.A.
Object Type:
Report
System:
The UNT Digital Library
RADIOISOTOPES AND RADIATION APPLICATIONS. Quarterly Progress Report No. 12
Continued research is reported in the areas of intrinsic radioactive tracers for industrial process control and the effects of structural factors on radioinduced graft polymerization. The use of Be-- Po neutron sources for production of short-lived isotopes is being investigated. Data are included on the effects of target volume, high-Z scattering media, target-isotope concentration, and macroscopic cross-section on speciflc and total activation produced with a 10-curie source. Research on graft-polyerization concerning the effects of structure on freetinued. Results indicate that the radical formed in a variety of substituted methacrylate polymers is the same in all cases. (J.R.D.)
Date:
April 18, 1962
Creator:
Sunderman, D.N. ed.
Object Type:
Report
System:
The UNT Digital Library
An Algol Compiler for the Control Data Corporation 1604. Progress Report No. 2
A summary of the progress on development of the ALGOL compiler for the Control Data Corporation 1604 Computer is presented. This computer is based on machine-independent specifications developed at ORNL. A brief description of the structure of the compiler is included along with discussions concerning language restrictions, the hardware language representation, and the required equipment configuration. An example illustrates the generated program instructions. (auth)
Date:
October 18, 1962
Creator:
Bumgarner, L. L.; Grau, A. A.; Lietzke, M. P.; Stueland, R. G. & Wolf, K. A.
Object Type:
Report
System:
The UNT Digital Library
Carbide Cathode Studies, Physical and Chemical Redeposition. Quarterly Progress Report, April 1, 1962-June 30, 1962
The utilization of physical and chemical processes to reduce the rate of vapor loss of thermionic emitters composed of mixed carbides of U and Zr in order to increase the permissible operating temperature is being studied. Preliminary, qualitative results obtained from study of physical redeposition processes showed that increasing the collector temperature may markedly reduce the rate of weight loss from a UC emitter operating at 2053 deg K. The requisite experimental equipment for studies of chemical transport processes was designed and constructed. Experiments will proceed through both a physical chemistry approach to an understanding of the transport processes and a technique to evaluate the efficacy of possible combinations of chemical species by monitoring the electron emission from diodes containing such mixtures. (auth)
Date:
July 18, 1962
Creator:
Weinberg, A. F.; Yang, L. & Langer, S.
Object Type:
Report
System:
The UNT Digital Library
A Method of Estimating the Kinetic Effects of Scram Rods
None
Date:
May 18, 1962
Creator:
Moore, K. V. & Gossmann, S. R.
Object Type:
Report
System:
The UNT Digital Library
"Life" Tests on Internally Water-Cooled Hollow Copper Conductors
Tests were conducted to determine whether a time limitation exists on the use of internally water-cooled hollow copper conductors operating at densities of up to 330,000 amps/in/sup 2/. Using demineralized water, having a specific resistivity of 4 to 9 x 10/sup 6/ ohm-cm, no indication of a decrease in heat transfer coefficient as a function of time was observed. However, metallographic examination revealed that corrosion--erosion does occur at a slow rate. Using process water there was a time dependent decrease in heat transfer coefficient and a consequent rise in metal temperature. The subsequent use of demineralized water in the same conductor again produced stable heat transfer, over the time spans investigated, 192 hours. The maximum total time investigated was 873 hours for one conductor. (auth)
Date:
July 18, 1962
Creator:
Lewin, J.
Object Type:
Report
System:
The UNT Digital Library
Calculation of Departure From Nucleate Boiling Conditions for the Spert Iii Reactor in the High Pressure Region
Calculations are made to determine the safe steadystate power operating limits of the Spert III reactor from the viewpoint of fuel plate burnout. A computer program is developed for the IBM 704 to aid in these calculations. The Bettis design departure from nucleate boiling (DNB) equation is used in conjunction with the LeTourneau and Grimble method of hot channel'' analysis in the development of the calculations. For cases where DNB occurs in the bulk boiling region, a modified Martinelli-Nelson twophase flow correlation and some experimental singlephase pressure drop data are employed. DNB for a typical operating condition of 550 deg F inlet temperature and 2500 psig is computed to check the code. The results of the sample calculation show that at a steady- state power level of 60 Mw (maximum design power) the minimum flow rate required to prevent DNB is approximately 8000 gpm. (auth)
Date:
April 18, 1962
Creator:
Dugone, J.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0051.1533]
Photograph taken for a newspaper owned by the Oklahoma Publishing Company. Caption: "One Died and two other persons were seriously injured when two cars above rammed together at the intersection of SH 152 and Newcastle Rd. late Wednesday afternoon."
Date:
January 18, 1962
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0227.0416]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "in aviation will benefit from a $300 grant made by Soon-Airs to Oklahoma City University."
Date:
April 18, 1962
Creator:
Lucas, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0238.0380]
Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Is Wesir-Wer, a top administrator of the temples of Aman and Monthu at Thebes in the fourth century, B. C. Dr. John D. Cooney, ancient art curator in the Brooklyn Museum, poses, top photo with the headless 28-inch-figure , which had been in a Cairo museum since 1903."
Date:
May 18, 1962
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0418.0320]
Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Firemen are silhouetted against a back ground of billowing flames"
Date:
September 18, 1962
Creator:
Gumm, John
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0243.0384]
Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "Baseball is the subject, no doubt, as Clint Courtney (left) , 89ers catcher, and Alvin Eggeling, city recreating director, get together at the 89ers banquet Wednesday."
Date:
April 18, 1962
Creator:
Gumm, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0051.1514]
Photograph taken for a newspaper owned by the Oklahoma Publishing Company. Caption: "It came unglued,' was the comment made by one officer at this crash scene 14 miles south of Ponca City."
Date:
June 18, 1962
Creator:
Casto, Bill
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0418.0317]
Photograph taken for a newspaper owned by the Oklahoma Publishing Company.
Date:
September 18, 1962
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0210]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Buck Cook, commissioner of charities and corrections, outside ward."
Date:
July 18, 1962
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0200]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
July 18, 1962
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0207]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
July 18, 1962
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0208]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
July 18, 1962
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0211]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mrs. Edna Goodspeed, chief matron, and Buck Cook inspect sewing room."
Date:
July 18, 1962
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0342.0264]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Greeting her young charge with a friendly smile, Mrs. R. M. Kitchen, Red Cross Motor Service volunteer will drive the youngster from home to Speech and Hearing Clinic, then home again."
Date:
April 18, 1962
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0261.0778]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Sir Edmund Hillary, a tall man who likes to climb tall mountains, was i n Oklahoma City Thursday - this time as a speaker rather than a mountain climber."
Date:
October 18, 1962
Creator:
Cobb, Richard
Object Type:
Photograph
System:
The Gateway to Oklahoma History