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Acoustic emission from beryllium

Description: The acoustic emission from both powder and ingot source beryllium has been measured as a function of strain and prior heat treatment. Most measurements were made during tensile deformation, but a limited number of compression tests have also been performed. The acoustic emission observed was of the burst type, with little or no contribution from continuous type emission. The emission was characterized by the variation of burst rate and average energy per burst as a function of strain. The tensile behavior was qualitatively similar for all the materials tested. Burst rate maxima centered roughly at 0.1 percent and 1.0 percent plastic strain were observed. The magnitude but not the strain at the low strain burst rate peak was very sensitive to prior thermal treatment, while the higher strain burst rate peak was insensitive to prior heat treatment. An energy per burst maximum was observed at 0.2 percent plastic strain, the magnitude of which was moderately sensitive to heat treatment. The Kaiser effect is observed in the material studied. Emission during compression was similar to that observed in tension. The acoustic emission observed is attributed to dislocation motion, as proposed by James and Carpenter for LiF, NaCl, and Zn. Metallographic studies of the beryllium at various strains have ruled out microcracking and twin formation as major contributors to the acoustic emission.
Date: June 9, 1976
Creator: Heiple, C. R. & Adams, R. O.
Partner: UNT Libraries Government Documents Department

Chemical research at Rocky Flats

Description: An overview of the research projects in the Chemical Research group will be given. The work involves actinide waste and processing chemistry, separations chemistry, radiation studies, and calorimetry and thermodynamics. Details will be given of the actinide separations research, including work with macroreticular anion exchangers and bidentate organophosphorus extractants.
Date: February 27, 1978
Creator: Navratil, J. D.
Partner: UNT Libraries Government Documents Department

Computor program for mathematical evaluation of the Rocky Flats nuclear accident dosimetry system

Description: A computer program has been developed to facilitate the evaluation of the Rocky Flats Emergency Dosimetry System. This program evaluates data to determine the neutron fluence associated with a criticality accident. It is necessary to obtain information about the critical system for personnel dose estimates. Information pertaining to the geometry and position of the critical material and orientation of personnel, with respect to the material, is essential to supplement the calculations contained in this program.
Date: December 20, 1977
Creator: Wood, C. B.
Partner: UNT Libraries Government Documents Department

Crate counter for normal operating loss. [Plutonium analysis in radioactive wastes]

Description: A lithium-loaded zinc sulfide scintillation counter to closely assay plutonium in waste packaged in 1.3 by 1.3 by 2.13m crates was built. In addition to assays for normal operating loss accounting, the counter will allow safeguards verification immediately before shipment of the crates for burial. The counter should detect approximately 10 g of plutonium in 1000 kg of waste.
Date: unknown
Creator: Harlan, R. A.
Partner: UNT Libraries Government Documents Department

Electron-beam fusion welding of beryllium

Description: Ingot-sheet beryllium (Be) having three different chemistries and three different thicknesses was fusion-welded by the electron-beam process. Several different preheats were used to obtain 100% penetration and crack-free welds. Cracking susceptability was found to be related to aluminum (Al) content; the higher Al-content material was most susceptable. However, adequate preheat allowed full penetration and crack-free welds to be made in all materials tested. The effect of a post-weld heat treatment on the mechanical properties of these compositions was also determined. The heat treatment produced no significant effect on the ultimate tensile strength. However, the yield strength was decreased and the ductility was increased. These changes are attributed to the formation of AlFeBe/sub 4/ and FeBe/sub 11/.
Date: January 1, 1978
Creator: Campbell, R. P.; Dixon, R. D. & Liby, A. L.
Partner: UNT Libraries Government Documents Department

Energy calibration scheme for acoustic emission

Description: The calibration technique described is an attempt to determine the actual energy release from the events causing emission bursts in beryllium and to quantitatively evaluate the effects of specimen geometry on the apparent energy per burst. (GHT)
Date: September 13, 1977
Creator: Adams, R. O. & Heiple, C. R.
Partner: UNT Libraries Government Documents Department

Evaluation of anion exchange resins for processing plutonium--neptunium residues

Description: An anion exchange process was developed to process miscellaneous residues of plutonium plus 0.5 wt % neptunium to allow prompt return of the plutonium to a plutonium recovery process. Several macroreticular anion exchange resins were compared to Dowex 1-X4 for the process. Dowex 1-X4 showed the best performance for the plutonium (III)-neptunium(IV) separation.
Date: August 20, 1977
Creator: Navratil, J. D. & Leebl, R. G.
Partner: UNT Libraries Government Documents Department

Evaluation of extraction chromatography for americium recovery

Description: Extraction, or reverse-phase partition chromatography, as used mostly for analytical separations, employs an organic solvent extractant as a stationary phase on an inert support material. This technique, which has the advantage of utilizing the versatility of solvent extraction systems with the less expensive operation of ion exchange equipment, was evaluated for a process to recover low level concentrations of americium from acidic process waste streams at Rocky Flats. The bidentate organophosphorous extractant DHDECMP (dihexyl-N, N-diethylcarbamylmethylene phosphonate) was used as the stationary phase since it was shown to effectively scavenge americium from acidic waste streams without significantly extracting impurity ions. Over 30 support materials were evaluated for DHDECMP capacity and for their ability to retain the extractant. Of the supports tested, the Amberlite XAD macroreticular sorbents were found to have the highest DHDECMP capacity. Amberlite XAD-4 beads retained the extractant significantly better than the other supports evaluated. Thus, this solvent was tested for americium breakthrough capacity and compared to the theoretical capacity.
Date: March 23, 1977
Creator: Alford, C. E. & Navratil, J. D.
Partner: UNT Libraries Government Documents Department

Fluidized bed incineration of transuranic contaminated waste

Description: A 9 kg/h pilot scale fluidized bed incinerator is now being used for burning various types of radioactive waste at Rocky Flats Plant. General solid combustible waste containing halogenated materials is burned in a fluidized bed of sodium carbonate for in stu neutralization of thermally generated acidic gases. A variety of other production related materials has been burned in the incinerator, including ion exchange resin, tributyl phosphate solutions, and air filters. Successful operation of the pilot plant incinerator has led to the design and construction of a production size unit to burn 82 kg/h of plant-generated waste. Residues from incinerator operations will be processed into glass buttons utilizing a vitrification plant now under development.
Date: January 1, 1976
Creator: Ziegler, D. L. & Johnson, A. J.
Partner: UNT Libraries Government Documents Department

Fluidized bed incineration system for U. S. Department of Energy defense waste. Status report, July--December 1976. [Defense waste]

Description: A fluidized-bed incineration facility has been designed for installation at the Rocky Flats Plant. The purpose is to develop and demonstrate the process for the combustion of transuranic waste. The unit capacity will be about 82 kg/hr of combustible waste. The combustion process will utilize in situ neutralization of acid gases generated in the process. The equipment design is based on data generated on a pilot scale unit and represents a scale-up factor of nine. Title II engineering is complete and construction work has begun.
Date: March 27, 1978
Creator: Richey, L. L.; Faccini, P. T. & Feng, P. K.
Partner: UNT Libraries Government Documents Department

Fundamental mechanisms of penetration in GTA welding

Description: Continued study of arc properties using emission spectroscopy coupled with computer simulation of the heat flow in welds has led to an understanding of the phenomena that control weld fusion zone shape. It was found that the liquid metal flow patterns in the weld pool are of prime importance and that arc current density characteristics and base metal properties have only indirect influence. The mode of interaction between the arc and weld pool flow is presented in qualitative terms.
Date: January 1, 1977
Creator: Mills, G. S.
Partner: UNT Libraries Government Documents Department

Gallium in the alpha and delta plutonium lattice

Description: Some general ideas are offered to further an understanding of the nature of the delta-phase plutonium--gallium alloys and their stability. Attention is given to a hypothesis relating to the role of gallium atom positions in the plutonium lattice. (GHT)
Date: January 1, 1976
Creator: Fischer, R. B.
Partner: UNT Libraries Government Documents Department

Interaction of xenon light with the surface of 304 stainless steel

Description: Laser amplifier frames fabricated from Type 304 stainless steel are known to cause damage to glass lenses by ejecting particles which are deposited on the lenses. High energy pulses of xenon light interact with the steel surface to produce damage sites. Heat treatment and surface cleaning procedures greatly affect the surface stability of the steel and influence contamination generated by the steel. It is believed that inclusions and/or carbides play a role, and the size of damage sites observed on glass correlate with the size of nonmetallic phases in the steel. Thermal etching of the steel was found to be a principle mechanism of surface damage caused by the high energy xenon light.
Date: February 14, 1978
Creator: Krenzer, R. W.
Partner: UNT Libraries Government Documents Department

Corrosion-induced acoustic emissions from uranium 4.5--weight percent niobium binary alloy

Description: The ability to monitor corrosion and stress-corrosion cracking of uranium 4.5-weight percent niobium was investigated. The acoustic emissions from stress-corrosion cracking were monitored using smooth four-point bend specimens, which were immersed in oxygen-saturated water containing chloride ions. The acoustic emissions from corrosion were monitored from rectangular corrosion coupons. These latter specimens were exposed to nitrogen-saturated and oxygen- saturated solutions of distilled water and distilled water with chloride ions. Dilute solutions of hydrochloric acid were also used. Findings show that stress- corrosion crack monitoring of the alloy was successful. Corrosion monitoring of the alloy showed a direct correlation between corrosion rate (based on weight loss) and total acoustic emissions. For a specific range, one can calculate the corrosion rate of uranium alloys in a corrosive solution from the total acoustic emissions generated. Studies to determine the source of corrosion-induced acoustic emissions were inconclusive.
Date: December 15, 1975
Creator: Mah, R.; Kochen, R. L. & Macki, J. M.
Partner: UNT Libraries Government Documents Department

Accurate machining

Description: Very minor test part experience of the all-rotary machine has been obtained. Results at this point appear to verify that the machines (both in the three axis and in the phonograph configuration) are inherently more accurate than machines with slides. Much more work is needed to define the desirable operating parameters and the size capacity of the all rotary machine. A second generation three axis machine is in the design stage which abandons mounting the vertical axes from the top, and instead has three vertical axes at various pin points of link points on a complex tool arm. The part then spins on a fixed axis. This machine is conceived to produce large diameter contoured laser mirrors with great accuracy. Going to a complex set of tool arm linkages greatly reduces the weight and forces on components to be moved during machining, reducing further the very minute deflection in the machining process.
Date: January 1, 1976
Creator: Burnham, M. W.
Partner: UNT Libraries Government Documents Department

JBK-75 microstructure specification recommendation. [Modified A-286]

Description: Since the ASTM-E-45 standard for microcleanliness is not applicable to superalloys like JBK-75 stainless steel (Modified A-286), Rocky Flats should adopt the Ladish microcleanliness standard (APML Cleanliness Classification of High Temperature Alloys Chart, 1971), as a guide for setting material acceptance specifications for JBK-75. Inclusion ratings of S-2, N-2, C-2, and M-2 should be acceptable. The microstructure should have a grain size of 5 or finer, but not smaller than 9, and microsegregation (banding) should be kept to a minimum.
Date: October 31, 1977
Creator: Brewer, A. W.
Partner: UNT Libraries Government Documents Department

Mechanics of micromachining

Description: The current state of machining theory is examined for relevance to micromachining. Of particular interest are those features of the theory which are important to optical surface finishes and surface characteristics. The relation of transverse strain or side flow to the nature of the machining marks is one example of interest. Correlation with measurements of machining parameters and surface finishes is given.
Date: January 1, 1976
Creator: Burnham, M. W.
Partner: UNT Libraries Government Documents Department

Report on metric study tour to Republic of South Africa

Description: The modernized metric system, known universally as the International System of Units (abbreviated SI under the French name) was renamed in 1960 by the world body on standards. A map shows 98 percent of the world using or moving toward adoption of SI units. Only the countries of Burma, Liberia, Brunei, and Southern Yemen are nonmetric. The author describes a two-week session in Pretoria and Johannesburg on metrication, followed by additional meetings on metrication in Rhodesia. (MCW)
Date: unknown
Creator: Laner, F. J.
Partner: UNT Libraries Government Documents Department

Reverse osmosis pilot plant studies for the purification and reuse of effluent from a sanitary waste treatment plant

Description: The Rocky Flats reverse osmosis pilot plant is described, and some data acquired from these operations are presented. A brief description of the equipment recommended for use in the recycling plant is also included.
Date: unknown
Creator: Plcok, C. E.; Hausburg, D. E. & Horrell, D. R.
Partner: UNT Libraries Government Documents Department

Screw calciner mechanical direct denitration process for plutonium nitrate to oxide conversion

Description: This report describes a screw calciner direct-denitration process for converting plutonium nitrate to plutonium oxide. The information should be used when making comparisons of alternative plutonium nitrate-to-oxide conversion processes or as a basis for further detailed studies. The report contains process flow sheets with a material balance; a process description; and a discussion of the process including history, advantages and disadvantages, and additional research required.
Date: October 14, 1977
Creator: Souply, K. R. & Sperry, W. E.
Partner: UNT Libraries Government Documents Department

Status report: waste incineration and fixation for Waste Management, Production, and Reprocessing Division of the Department of Energy (July--December 1976)

Description: Fluidized bed incineration and waste fixation processes are being used to process the types of wastes expected from nuclear fuel reprocessing and production plants. Test incineration runs have been made on two types of wastes: high efficiency particulate air (HEPA) filters and tributyl phosphate-solvent solutions. Laboratory-scale vitrification equipment was used to produce glass pellets from incinerator ash and blends of other expected waste streams. Computer modeling gave an expected product integrity life of over 2,000 years.
Date: November 25, 1977
Creator: Ziegler, D. L.; White, J. W.; Johnson, A. J.; Fong, L. Q.; Teter, A. R. & Chung, S. F.
Partner: UNT Libraries Government Documents Department

Secondary recovery of plutonium and americium from process waste streams by solvent extraction

Description: A solvent extraction process is being evaluated for the secondary recovery of plutonium and americium from Rocky Flats waste streams. The bidentate organophosphorus compounds dihexyl-N,N-diethylcarbamylmethylene phosphonate and its dibutyl analogue have been shown to be selective extractants for the actinides from solutions of nitric acid. The results from laboratory test runs in which the organophosphorus extractants were used for processing secondary waste solutions will be presented. Solvent extractant properties and purification procedures are discussed.
Date: January 16, 1978
Creator: Hagan, P. G. & Navratil, J. D.
Partner: UNT Libraries Government Documents Department

Filter testing and development for prolonged transuranic service and waste reduction

Description: The life of High Efficiency Particulate Air (HEPA) filters used in transuranic service is influenced greatly by the gaseous and particulate matter to which the filters are exposed. The most severe conditions encountered at Rocky Flats are at the ventilation systems serving the plutonium recovery operations in Bldg. 771. A project of filter testing and development for prolonged transuranic service and waste reduction was formally initiated at Rocky Flats on July 1, 1975. The project is directed toward improving filtration methods which will prolong the life of HEPA filter systems without sacrificing effectiveness. Another important aspect of the project is to reduce the volume of HEPA filter waste shipped from the plant for long-term storage. Progress to September 30, 1976, is reported.
Date: February 1, 1977
Creator: Geer, J. A.; Buttedahl, O. I.; Skaats, C. D.; Terada, K. & Woodard, R. W.
Partner: UNT Libraries Government Documents Department