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Separation of trivalent lanthanides and actinides by solvent extraction without aqueous complexing agents

Description: A method of separating the trivalent actinides, mainly Am and Cm, from trivalent lanthanides is presented. This method embodies the sequential use of two different solvent extractants; the first extractant would remove the heavy lanthanides from the lighter lanthanides and Am--Cm, while the second would extract Am--Cm in preference to the lighter lanthanides. In this scheme, no additional complexing agents are required. Thus, waste disposal and corrosion problems are minimized. Overall separation factors for Am--Cm from lanthanide fission products in reactor wastes may be as high as several thousand. (auth)
Date: January 30, 1976
Creator: Kasting, G.B.; Heppert, J.A.; Hulet, E.K. & Wild, J.F.
Partner: UNT Libraries Government Documents Department

Flowsheet development for HTGR fuel reprocessing

Description: Development studies to date indicate that the HTGR fuel blocks can be effectively crushed with two stages of eccentric jaw crushing, followed by a double-roll crusher, a screener and an eccentrically mounted single-roll crusher for oversize particles. Burner development results indicate successful long-term operation of both the primary and secondary fluidized-bed combustion systems can be performed with the equipment developed in this program. Aqueous separation development activities have centered on adapting known Acid-Thorex processing technology to the HTGR reprocessing task. Significant progress has been made on dissolution of burner ash, solvent extraction feed preparation, slurry transfer, solids drying and solvent extraction equipment and flowsheet requirements.
Date: April 30, 1976
Creator: Baxter, B.; Benedict, G. E. & Zimmerman, R. D.
Partner: UNT Libraries Government Documents Department

Analysis of BWR pressure suppression pool dynamics

Description: The design basis loss of coolant accident (LOCA) for light water nuclear reactors postulates a major break in a coolant line. Both the response of the reactor vessel and its mechanical system as well as the response of the pressure suppression containment system exterior to the pressure vessel are of primary interest following such an event. The ability to determine system response and the suitability of particular mechanical and structural design features in both cases is predicted on the completeness with which the dynamic environment created in the various compartments is treated. In January of 1976, the Lawrence Livermore Laboratory (LLL) began a program for the NRC (RSR) to provide a sample problem solution activity which treats by numerical analysis the air-steam-water system flow implied by a LOCA. As a basis and focal point for modeling, the program addressed itself to the pressure suppression pool dynamics representative of the Mark I BWR. Program activities to date are described.
Date: August 30, 1976
Creator: McCauley, E. W.; Martin, R. W. & Sutton, S. B.
Partner: UNT Libraries Government Documents Department

HTGR fuel reprocessing technology

Description: The following aspects of HTGR reprocessing technology are discussed: characteristics of HTGR fuels, criteria for a fuel reprocessing flowsheet; selection of a reference reprocessing flowsheet, and waste treatment. (LK)
Date: April 30, 1976
Creator: Brooks, L. H.; Heath, C. A. & Shefcik, J. J.
Partner: UNT Libraries Government Documents Department

Hadron physics at Fermilab. [Review lectures]

Description: Recent experimental results from studies of hadron interactions at Fermilab are surveyed. Elastic, total and charge-exchange cross section measurements, diffractive phenomena, and inclusive production, using nuclear as well as hydrogen targets, are discussed in these lectures.
Date: August 30, 1976
Creator: Ferbel, T.
Partner: UNT Libraries Government Documents Department

Laser fusion burn diagnostics using several. cap alpha. -time-of-flight spectrometers

Description: A more compact ..cap alpha..-particle time-of-flight spectrometer using a permanent field deflection magnet has been developed for laser fusion burn diagnostics. The spectrometer is being used to measure the number and energy distribution of fusion-produced ..cap alpha.. particles emitted from laser implosions of DT gas contained in glass microshells. It is planned to view the target from different angles using several spectrometers simultaneously. Comparison of energy loss and energy broadening vs angle can yield information concerning the nature of compression and subsequent burn. Results from target experiments on the LLL ARGUS laser facility are present.
Date: September 30, 1976
Creator: Tirsell, K. G.; Catron, H. C.; Glaros, S. S. & Slivinsky, V. W.
Partner: UNT Libraries Government Documents Department

Design techniques and measured performance for a uniformly-pumped 4-cm diameter rod amplifier

Description: A solid-state laser rod amplifier of moderate aperture achieving a high degree of spatial gain uniformity has been constructed and its performance evaluated. Digital and analogue techniques were used to optimize the amplifier design for performance in a laser fusion application. Results of simple 2-D computer simulations and experimental evaluations of amplifier performance are presented.
Date: June 30, 1976
Creator: Linford, G. J. & Yarema, S. M.
Partner: UNT Libraries Government Documents Department

Laser fusion burn diagnostics using several. cap alpha. -time-of-flight spectrometers

Description: A more compact ..cap alpha..-particle time-of-flight spectrometer using a permanent field deflection magnet has been developed for laser fusion burn diagnostics. The spectrometer is being used to measure the number and energy distribution of fusion-produced ..cap alpha.. particles emitted from laser implosions of DT gas contained in glass microshells. It is planned to view the target from different angles using several spectrometers simultaneously. Comparison of energy loss and energy broadening vs angle can yield information concerning the symmetry of compression and subsequent burn. Results from target experiments on the LLL ARGUS laser facility are present.
Date: September 30, 1976
Creator: Tirsell, K. G.; Catron, H. C.; Glaros, S. S. & Slivinsky, V. W.
Partner: UNT Libraries Government Documents Department

Development scenario for laser fusion

Description: This scenario proposes establishment of test and engineering facilities to (1) investigate the technological problems associated with laser fusion, (2) demonstrate fissile fuel production, and (3) demonstrate competitive electrical power production. Such facilities would be major milestones along the road to a laser-fusion power economy. The relevant engineering and economic aspects of each of these research and development facilities are discussed. Pellet design and gain predictions corresponding to the most promising laser systems are presented for each plant. The results show that laser fusion has the potential to make a significant contribution to our energy needs. Beginning in the early 1990's, this new technology could be used to produce fissile fuel, and after the turn of the century it could be used to generate electrical power.
Date: March 30, 1976
Creator: Maniscalco, J. A.; Hovingh, J. & Buntzen, R. R.
Partner: UNT Libraries Government Documents Department

Marshall Islands radiological followup

Description: In August, 1968, President Johnson announced that the people of Bikini Atoll would be able to return to their homeland. Thereafter, similar approval was given for the return of the peoples of Enewetak. These two regions, which comprised the Pacific Nuclear Testing Areas from 1946 to 1958, will probably be repopulated by the original inhabitants and their families within the next year. As part of its continuing responsibility to insure the public health and safety in connection with the nuclear programs under its sponsorship, ERDA (formerly AEC) has contracted Brookhaven National Laboratory to establish radiological safety and environmental monitoring programs for the returning Bikini and Enewetak peoples. These programs are described in the following paper. They are designed to define the external radiation environment, assess radiation doses from internal emitters in the human food chain, make long range predictions of total doses and dose commitments to individuals and to each population group, and to suggest actions which will minimize doses via the more significant pathways. (auth)
Date: April 30, 1976
Creator: Greenhouse, N.A. & McCraw, T.F.
Partner: UNT Libraries Government Documents Department

Computerized mass spectrometer data system at LLL

Description: The data systems on the three mass spectrometers at LLL are computer-controlled, pulse-counting systems synchronized to a repeatedly swept magnetic field. The data are accumulated in the memory of the computer or in a Nuclear Data ND 180 in a multi-scaler mode of operation. This mode of data acquisition allows a continuous check of the background stability and makes tune-up easier. But the main benefit is a reduction in the required ion emission rate stability. By the use of standards to set the system dead time, we have been able to utilize the sensitivity of a pulse counting system without the expense of exotic equipment.
Date: June 30, 1976
Creator: Friesen, R. D. & Dupzyk, R. J.
Partner: UNT Libraries Government Documents Department

Management Oversight and Risk Tree (MORT): a new system safety program

Description: Experiences of Aerojet Nuclear Company (ANC), in the development and implementation of a system safety program for ANC and for the Energy Research and Development Administration (ERDA) are discussed. Aerojet Nuclear is the prime operating contractor for ERDA, formerly AEC, at the Idaho National Engineering Laboratory. The ERDA sponsored ''MORT'' system safety program is described along with the process whereby formal system safety methods are incorporated into a stable organization. Specifically, a discussion is given of initial development of MORT; pilot program trials conducted at ANC; implementation methodology; and reaction of the ANC organization. (auth)
Date: April 30, 1976
Creator: Clark, J.L.
Partner: UNT Libraries Government Documents Department

Comparison of the inelastic response of steel building frames to strong earthquake and underground nuclear explosion ground motion

Description: Analytic studies were made of the adequacy of simulating earthquake effects at the Nevada Test Site for structural testing purposes. It is concluded that underground nuclear explosion ground motion will produce inelastic behavior and damage comparable to that produced by strong earthquakes. The generally longer duration of earthquakes compared with underground nuclear explosions does not appear to significantly affect the structural behavior of the building frames considered. A comparison of maximum ductility ratios, maximum story drifts, and maximum displacement indicate similar structural behavior for both types of ground motion. Low yield (10 - kt) underground nuclear explosions are capable of producing inelastic behavior in large structures. Ground motion produced by underground nuclear explosions can produce inelastic earthquake-like effects in large structures and could be used for testing large structures in the inelastic response regime. The Nevada Test Site is a feasible earthquake simulator for testing large structures.
Date: June 30, 1976
Creator: Murray, R. C. & Tokarz, F. J.
Partner: UNT Libraries Government Documents Department

Seismic evaluation of critical facilities at the Lawrence Livermore Laboratory. [Evaluation of effects of severe earthquake loading]

Description: The performance of critical facilities at the Lawrence Livermore Laboratory (LLL) are being evaluated for severe earthquake loading. Facilities at Livermore, Site-300 and the Nevada Test Site are included in this study. These facilities are identified, the seismic criteria used for the analysis are indicated, the various methods used for structural analysis are discussed and a summary of the results of facilities analyzed to date are presented.
Date: June 30, 1976
Creator: Murray, R. C. & Tokarz, F. J.
Partner: UNT Libraries Government Documents Department

In situ measurement of residual plutonium

Description: Nondestructive assay techniques were developed and implemented to permit the measurement of residual plutonium in glove boxes, conveyors, and tanks in areas of varying background using both gamma and neutron portable detection equipment. The gamma detector was a 2 x 2 inch sodium iodide detector collimated to view a well defined area. The neutron detector consisted of /sup 3/He tubes in a polyethylene case with a small amount of directionality. Application of the described techniques to equipment prior to removal has shortened the clean-up time by identifying the locations of recoverable quantities. The agreement between assigned values and recovered plutonium has been within 16 percent for quantities ranging from several grams up to kilogram levels.
Date: June 30, 1976
Creator: Kindle, C. H.
Partner: UNT Libraries Government Documents Department

Basic requirements of laser fusion power production and laser fusion-fission plutonium breeding

Description: Required values of thermonuclear energy-gain, inertial confinement, laser-pulse energy and power for both electric power production by laser-fusion and for plutonium breeding by laser fusion-fission are obtained from simple considerations, and are tabulated for purposes of comparison. It is found that breeder requirements are very significantly less demanding, suggesting that plutonium breeding is a much more feasible near-term goal of laser fusion.
Date: September 30, 1976
Creator: Kidder, R. E.
Partner: UNT Libraries Government Documents Department

Hyperfine structure measurements in /sup 235/U I

Description: Using a pressure tuned narrowband pulsed dye laser we have investigated hyperfine effects in several ground state transitions in /sup 235/U I using the multistep laser photoionization method on an atomic beam. The instrumental linewidth was 300 to 400 MHz corresponding to a calculated residual Doppler width of approximately 300 MHz and a laser width of about 100 MHz. The technique also provides very accurate values (less than 100 MHz) for the isotope shifts for the investigated transitions.
Date: September 30, 1976
Creator: Paisner, J. A.; May, C. A.; Carlson, L. R.; Worden, E. F.; Johnson, S. A. & Solarz, R. W.
Partner: UNT Libraries Government Documents Department