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Conceptual design of a laser fusion power plant

Description: A conceptual design of a laser fusion power plant is extensively discussed. Recent advances in high gain targets are exploited in the design. A smaller blanket structure is made possible by use of a thick falling region of liquid lithium for a first wall. Major design features of the plant, reactor, and laser systems are described. A parametric analysis of performance and cost vs. design parameters is presented to show feasible design points. A more definitive follow-on conceptual design study … more
Date: July 14, 1977
Creator: Maniscalco, J. A.; Meier, W. R. & Monsler, M. J.
Partner: UNT Libraries Government Documents Department
open access

Clinch River Breeder Reactor secondary control rod system

Description: The shutdown system for the Clinch River Breeder Reactor (CRBR) includes two independent systems--a primary and a secondary system. The Secondary Control Rod System (SCRS) is a new design which is being developed by General Electric to be independent from the primary system in order to improve overall shutdown reliability by eliminating potential common-mode failures. The paper describes the status of the SCRS design and fabrication and testing activities. Design verification testing on the com… more
Date: September 14, 1977
Creator: McKeehan, E. R. & Sim, R. G.
Partner: UNT Libraries Government Documents Department
open access

Fluorescence-pumped photolytic gas laser system for a commercial laser fusion power plant

Description: The first results are given for the conceptual design of a short-wavelength gas laser system suitable for use as a driver (high average power ignition source) for a commercial laser fusion power plant. A comparison of projected overall system efficiencies of photolytically excited oxygen, sulfur, selenium and iodine lasers is described, using a unique windowless laser cavity geometry which will allow scaling of single amplifier modules to 125 kJ per aperture for 1 ns pulses. On the basis of hig… more
Date: July 14, 1977
Creator: Monsler, M.J.
Partner: UNT Libraries Government Documents Department
open access

Results from the 1/5-scale Mark I BWR pressure suppression experiment

Description: A series of consistent, versatile, and accurate air-water tests simulating LOCA conditions has been completed on the /sup 1///sub 5/-scale Mark I BWR Pressure Suppression Experimental Facility. Detailed histories of vertical loads on the wetwell are obtained in a carefully scaled three-dimensional system. In particular, variation of hydrodynamic-generated vertical loads with changes in drywell pressurization rate, downcomer submergence, and the vent-line loss coefficient were established. An in… more
Date: October 14, 1977
Creator: Pitts, J.H. & McCauley, E.W.
Partner: UNT Libraries Government Documents Department
open access

Characterization of nuclear waste

Description: Nuclear wastes which are logical candidates for deep geologic disposal include commercial (spent fuel, reprocessing) and defense wastes. It is expected that the 5250 metric tons of spent fuel discharged through the end of 1978 would increase to about 100,000 tons by the end of 2000. The individual characteristics of each waste type (spent fuel, solidified waste, defense wastes) are described in turn. (DLC)
Date: February 14, 1979
Creator: Platt, A. M.
Partner: UNT Libraries Government Documents Department
open access

Capture cross section and gamma-ray spectrum calculations for medium-weight nuclei. [Double-peak, energy-dependent Breit-Wigner model]

Description: A double-peak, energy-dependent Breit-Wigner model of the E1 gamma-ray strength function was applied to nuclei from As to Rh, to predict their neutron capture cross sections and capture gamma-ray spectra. A consistent set of model parameters was obtained in this mass region to describe the step in the low-energy tail of the E1 strength function. This step allows agreement with photonuclear data at high energies, the correct GAMMA/sub gamma/ to be obtained for agreement with neutron capture cros… more
Date: November 14, 1979
Creator: Gardner, M. A. & Gardner, D. G.
Partner: UNT Libraries Government Documents Department
open access

Survey of Modes and Their Effects in ORMAK, ISX-A, and ISX-B

Description: A comparison of some features of the three tokamaks is given. The ORMAK and ISX-A have ceased operation. The ISX-B has completed a checkout phase with studies of circular, ohmically heated plasmas in which it performed much like ISX-A. Shaped and injection heated plasmas are being studied. Diagnostics for mode structures were the usual Mirnov loops for approx.B/sub theta/ and collimated soft x-ray detectors for the internal fluctuations approx.X. The approx.X measurements on ISX-A, and thus far… more
Date: February 14, 1979
Creator: Dunlap, J. L.; Burris, R. D.; Harris, J. H.; Navarro, A. P. & Pare, V. K.
Partner: UNT Libraries Government Documents Department
open access

New radiobiological findings bearing on the 1977 ICRP recommendations. [Sensitivity of mouse and monkey prenatal oocytes to chronic, low-dose, tritium exposure]

Description: Recent experiments on low-level irradiation during development raise questions relevant to ICRP Publication 26. Mice and monkeys were studied; the measured endpoint was the radiation-induced loss of female germ cells. Three issues are examined. The first is the numerical value of Q (quality factor) appropriate for low-energy beta rays. Comparisons of tritium with gamma radiation were made under conditions of chronic, low-level exposure, and the relative biological effectiveness (RBE) was found … more
Date: February 14, 1979
Creator: Dobson, R.L.
Partner: UNT Libraries Government Documents Department
open access

Cyclotron design studies for a medical ion accelerator

Description: A two year design study has been completed for medical ion accelerators with beams of sufficient range and intensity for therapy. The particles of main interest were ions between carbon and neon, but the generation of proton and neutron beams was studied also. Cyclotrons appear to be good injectors for a heavy ion medical synchrotron, particularly if neutron and/or isotope production is desired as well. They also offer a competitive solution for proton beams of 250 MeV. A superconducting cyclot… more
Date: September 14, 1978
Creator: Behrsing, G. U.; Clark, D. J.; Hoyer, E. H.; Leemann, C. W.; Voelker, F. & Yourd, R. B.
Partner: UNT Libraries Government Documents Department
open access

Heat transfer in inertial confinement fusion reactor systems

Description: The transfer of energy produced by the interaction of the intense pulses of short-ranged fusion microexplosion products with materials is one of the most difficult problems in inertially-confined fusion (ICF) reactor design. The short time and deposition distance for the energy results in local peak power densities on the order of 10/sup 18/ watts/m/sup 3/. High local power densities may cause change of state or spall in the reactor materials. This will limit the structure lifetimes for ICF rea… more
Date: May 14, 1979
Creator: Hovingh, J.
Partner: UNT Libraries Government Documents Department
open access

Value engineering and the role of R and D in the neutral beam program

Description: Value Engineering, simply defined, is a systematic approach to getting more for your money. It has been used to reduce the cost of a wide variety of products by the D.O.D. and in principle, should be applicable to various phases of the Neutral Beam Program. With respect to R and D, the principles of Value Engineering must be used with caution. They are most effective in evaluating directed development with very specific goals, but can be misleading when considering advanced innovative work.
Date: May 14, 1979
Creator: Fink, J.
Partner: UNT Libraries Government Documents Department
open access

Elastic and plastic properties of uranium dioxide from 5 to 330 GPa

Description: Published Hugoniot data for UO/sub 2/ is in error, because the measuring techniques used did not resolve the strong multiple-wave shock-structures present. Hence calculations related to liquid metal, fast-breeder-reactor, excursion analyses based on extrapolations of that data are in serious error. The inclined prism, flash gap, and two-stage gas-gun techniques are used to determine shock-compression parameters for UO/sub 2/ to 300 GPa. The Hugoniot elastic limit for UO/sub 2/ was found to be 5… more
Date: May 14, 1979
Creator: Gust, W.H.
Partner: UNT Libraries Government Documents Department
open access

Measuring social risk and determining its acceptability

Description: The implementation of a nuclear waste management technology raises several issues concerning the regulation of social risk. This paper presents a decision analytic approach to resolving some of those issues. A methodology for developing a radiological risk measure is presented, and several approaches to defining acceptable levels of that risk measure are considered. The methodology presented is oriented toward the development of radiological performance objectives for use as guidance in the dra… more
Date: July 14, 1978
Creator: Lathrop, J.W.
Partner: UNT Libraries Government Documents Department
open access

Neutral beam production using negative ions

Description: Techniques for producing intense negative ion beams are discussed. These beams are required for intense neutral beam development at energies greater than 150 keV. Handling, acceleration, and stripping of negative ion beams are described.
Date: June 14, 1978
Creator: Hooper, E. B. Jr.
Partner: UNT Libraries Government Documents Department
open access

Driving pockels cells in multi-arm lasers

Description: This paper describes the method used to drive Pockels cells on the 20-arm Shiva laser for inertial confinement fusion research at the Lawrence Livermore Laboratory. Shiva became operational last fall, and has just completed a series of 20-arm target shots. It uses two pockels cell gates in each laser arm for suppression of amplified spontaneous emission (ASE) that can damage or destroy the target before the main pulse arrives. Two additional Pockels cells are used in the preamplification stages… more
Date: June 14, 1978
Creator: Carder, B. M.
Partner: UNT Libraries Government Documents Department
open access

Thermophysical measurements on liquid metals above 4000 K

Description: Thermophysical data are presented for liquid niobium up to approximately 6000/sup 0/K and for liquid lead up to approximately 5000/sup 0/K. These new results are summarized along with previously obtained high temperature data for liquid molybdenum, tantalum, tungsten, and uranium.
Date: April 14, 1977
Creator: Shaner, J. W.; Gathers, G. R. & Hodgson, W. M.
Partner: UNT Libraries Government Documents Department
open access

Three-phase region of D/sub 2/-DT-T/sub 2/

Description: The three-phase region of various mixtures of D/sub 2/, DT, and T/sub 2/ has been investigated through plots of temperature and pressure vs time. The liquid surface for a temperature-vs-composition plot is obtained from the points of first freezing. The solid surface is obtained from the points of first melting after a quick freeze. All components appear miscible in both liquid and solid phases from 17 to 22 K. From analogy to H-T systems, the chemical equilibria in these D-T systems were assum… more
Date: January 14, 1977
Creator: Souers, P. C.; Kelly, E.; Roberts, P. E.; Fearon, D. & Tsugawa, R. T.
Partner: UNT Libraries Government Documents Department
open access

Electroplated solder for superconductor application. [Pb--Sn]

Description: Lead-tin plating can be rapidly and uniformly applied to a 0.25 in. square copper conductor. Such plating can be used as solder with a minimum flux requirement. In the range studied, the tin content of the coating can be controlled. It varies directly with the tin content of the bath and amperage and inversely with the temperature.
Date: September 14, 1976
Creator: Roust, G. W. & Kelley, W. K.
Partner: UNT Libraries Government Documents Department
open access

Two-phase-flow cooling concept for fusion reactor blankets

Description: The new two-phase heat transfer medium proposed is a mixture of potassium droplets and helium which permits blanket operation at hih temperature and low pressure, while maintaining acceptable pumping power requirements, coolant ducting size, and blanket structure fractions. A two-phase flow model is described. The helium pumping power and the primary heat transfer loop are discussed. (MOW)
Date: January 14, 1977
Creator: Bender, D. J. & Hoffman, M. A.
Partner: UNT Libraries Government Documents Department
open access

Geothermal Reservoir Interpretation from Change in Gravity

Description: Precision gravity methods provide new information regarding geothermal reservoir mechanisms and depletion. This paper discusses the principles of present interpretations and early conclusions from two producing geothermal fields, Wairakei, in New Zealand, and The Geysers, California. 4 refs., 4 figs.
Date: December 14, 1977
Creator: Isherwood, William
Partner: UNT Libraries Government Documents Department
open access

Optimal Timing of Geothermal Energy Extraction

Description: This paper is concerned with the optimal time to commence extraction of energy from a hot-water geothermal reservoir. The economic models that we have presented in the past have the common characteristics that the extraction program starts immediately (see References 1 and 2). Based on this assumption, we determined optimal extraction strategies and planning horizons such that the present values of total profits were maximized. In this study we relax the requirement that extraction be undertake… more
Date: December 14, 1977
Creator: Golabi, Kamal & Scherer, Charles R.
Partner: UNT Libraries Government Documents Department
open access

Progress Report on Multiphase Geothermal Modeling

Description: Work over the past year has concentrated on three areas: 1) to implement a concept of vertical equilibrium in geothermal modeling, 2) to improve the matrix equation solution technique for both two- and three-dimensional models, which improvements this report describes in detail, and 3) to apply a vertical equilibrium, areal model to the Wairakei, New Zealand geothermal field. The steady-state modeling indicates that large regions in the reservoir probably had a small steam cap prior to exploita… more
Date: December 14, 1977
Creator: Mercer, James W. & Faust, Charles R.
Partner: UNT Libraries Government Documents Department
open access

Summary of Results of HGP-A Well Testing

Description: The experimental well, HGP-A, drilled under the auspices of the Hawaii Geothermal Project, is located on the island of Hawaii near the eastern rift of Kilauea volcano. Drilling was completed to a depth of 6450 feet in April 1976. The well is cased to 2230 feet below the surface, which is 600 feet above sea level, with a slotted liner running from the end of the casing to bottomhole. Cuttings and core samples obtained during drilling indicate that the region is composed of volcanic basalt with a… more
Date: December 14, 1977
Creator: Kihara, D.; Chen, B.; Yuen, P. & Takahashi, P.
Partner: UNT Libraries Government Documents Department
open access

Well Interference Study of the Multi-Layered Salton Sea Geothermal Reservoir

Description: A well interference testing program of the Salton Sea Geothermal reservoir is being conducted as part of a resource evaluation study by the Earth Sciences Geothermal Industrial Support Program of the Lawrence Livermore Laboratory. Studies to date indicate the reservoir rock to be composed of layered sequences of shales and sands. Wells involved in the testing program are being used in support of, or are in the vicinity of, the MAGMA-SDG&E Geothermal Loop Experimental Facility (GLEF), located in… more
Date: December 14, 1977
Creator: Morse, J.G.
Partner: UNT Libraries Government Documents Department
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