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Material control assessment procedure

Description: The material control system assessment procedure being developed by the Lawrence Livermore Laboratory for the U.S. Nuclear Regulatory Commission is reviewed. It consists of five major sections: Target Identification, Adversary Sequence and Simuli Generation, Material Control System Response Determination, Safeguard System Outcome Determination, and Safeguard System Utility Determination. When adopted, this procedure will reduce safeguards licensing problems by providing compatibility with futur… more
Date: June 1, 1977
Creator: Adams, R. W. & Spogen, L. R.
Partner: UNT Libraries Government Documents Department
open access

Material control assessment procedure

Description: The material control system assessment procedure being developed by the Lawrence Livermore Laboratory for the U.S. Nuclear Regulatory Commission is reviewed. It consists of five major sections: Target Identification, Adversary Sequence and Simuli Generation, Material Control System Response Determination, Safeguard System Outcome Determination, and Safequard System Utility Determination. When adopted, this procedure will minimize safeguards licensing problems by providing compatibility with fut… more
Date: June 1, 1977
Creator: Adams, R. W. & Spogen, L. R.
Partner: UNT Libraries Government Documents Department
open access

Study of the comparative costs of five wet/dry cooling tower concepts

Description: A previous study undertaken to ascertain the economic incentives for further development of advanced dry/wet cooling towers showed that an advanced dry cooling concept using ammonia as an intermediate cooling fluid reduced the incremental cost of dry cooling by approximately 25 to 30%. This paper presents the projected costs of five alternative dry/wet concepts, one of which involves a similar use of ammonia. This study concludes that although absolute quantitative cost estimates for these cool… more
Date: June 1, 1977
Creator: Allemann, R T; Feletti, D W; Johnson, B M; Parry, H L; Smith, G C; Tokarz, R D et al.
Partner: UNT Libraries Government Documents Department
open access

Remote Disassembly of Radioactively Contaminated Vessels by Means of an Arc Saw

Description: The arc saw, a newly developed tool, is a toothless circular saw which cuts by means of an electric arc. Cutting speeds between 20 to 30 cm/sup 2//S and depths up to 45 cm are possible. There is no mechanical contact between blade and work piece, no binding, and no blade breakage. The arc saw will be applied to the rapid and remote disassembly of multiple ton, contaminated stainless steel vessels.
Date: June 30, 1977
Creator: Beitel, G. A.
Partner: UNT Libraries Government Documents Department
open access

Reference mirror hybrid fusion-fission reactor design

Description: The status of the reference mirror hybrid reactor design being performed by LLL and General Atomic is summarized. The reactor parameters have been chosen to minimize the cost of producing fissile fuel for consumption in fission power reactors. The design draws on the experience developed at LLL in previous hybrid reactor conceptual designs and on GA expertise in gas-cooling technology and fission reactor mechanical design. As in the past, we have emphasized the use of existing technology where … more
Date: June 8, 1977
Creator: Bender, D. J.; Lee, J. D. & Neef, W. S.
Partner: UNT Libraries Government Documents Department
open access

Neutron production in a high-intensity deuterium neutral beam facility

Description: Measurement of d-d neutron yields incidentally produced in multi-megawatt neutral deuterium beam injectors used in magnetic fusion experiments is discussed. Unavoidable neutron production in the neutralizer, ion-beam dump, neutral beam calorimeter and beam collimator sections of an injector is measured to provide data for the design of radiation shielding and beam diagnostic experiments. At 120 kV, 10A, 0.5s pulsed injector operation, neutron yields plateau at an instantaneous yield from the ca… more
Date: June 1, 1977
Creator: Berkner, K. H.; Cooper, W. S.; McCaslin, J. B. & Pyle, R. V.
Partner: UNT Libraries Government Documents Department
open access

Mobile nondestructive assay verification and measurement system

Description: A mobile, real-time, nondestructive assay system has been developed for both nuclear material safeguards inventory verifications and measurements on the Hanford project. The system includes electronic and computer support equipment mounted in a specially constructed vehicle, and passive and active neutron and gamma-ray measurement equipment transported in the vehicle but operated external to the vehicle. This system significantly increases safeguards verification and measurement capabilities.
Date: June 1, 1977
Creator: Brauer, F P; Fager, J E; Kaye, J H & Sorenson, R J
Partner: UNT Libraries Government Documents Department
open access

Solar crop drying conference. Proceedings

Description: Thirteen papers are included. Three were represented by extended abstracts and are listed by title. Separate abstracts were prepared for ten papers. (MHR)
Date: June 30, 1977
Creator: Butler, J.L. (comp.)
Partner: UNT Libraries Government Documents Department
open access

Relaxation of neodymium in a weakly ionized expanding plasma

Description: The laser resonance absorption technique has been used to determine the relaxation rate of electronically excited neodymium vapor during its expansion into vacuum. Significant increases of population into ground and 1128 cm/sup -1/ levels were found. Analysis shows that interaction between excited metastable atoms and electrons are much more important for relaxation than atom-atom collisions. The final population of neodymium appears to be frozen at a temperature lower than the surface temperat… more
Date: June 21, 1977
Creator: Chen, H. L.; Bedford, R.; Borzileri, C.; Brunner, W. & Hayes, M.
Partner: UNT Libraries Government Documents Department
open access

Mechanical structure of the Mirror Hybrid Reactor Power Plant

Description: The mechanical structure of the LLL/GA Mirror Hybrid Reactor vessel is briefly discussed. Functional requirements and over-all design considerations leading to selection of a post-tensioned concrete reactor vessel and a modular blanket approach are indicated. Module design life of four years, module replacement, capability and remote fueling are provided by the chosen structural design. (RME)
Date: June 6, 1977
Creator: Culver, D.W. & Neef, W.S.
Partner: UNT Libraries Government Documents Department
open access

H(t,n)/sup 3/He reaction for depth profiling of hydrogen by neutron time-of-flight

Description: The usefulness of the H(t,n) reaction for depth profiling of hydrogen in solids was investigated using the pulsed T/sup +/ beam from the Los Alamos vertical Van de Graaff. A 2.54 cm diameter by 2.54 cm thick stilbene neutron detector was placed at 0/sup 0/, 5.35 meters from the target. Pulse shape discrimination virtually eliminated gamma-ray background. Neutron spectra from targets of Ti and TiH/sub 2/ with a nominal thickness of ten microns were compared with targets of SiO/sub 2/, Si, C and … more
Date: June 1, 1977
Creator: Davis, J. C.; Lefevre, H. W.; Poppe, C. H.; Drake, D. M. & Veeser, L. R.
Partner: UNT Libraries Government Documents Department
open access

H(t,n)/sup 3/He reaction for depth profiling of hydrogen by neutron time-of-flight

Description: The cross section for the H(t,n) reaction is large (200 to 700 mb/sr at 0/sup 0/) and smoothly varying. The usefulness of this reaction for depth profiling hydrogen in solids was investigated using the pulsed T/sup +/ beam from the Los Alamos vertical Van de Graaff. Neutron spectra from targets of Ti and TiH/sub 2/ with a nominal thickness of ten microns were compared with targets of SiO/sub 2/, C and Au to assess the importance of neutron backgrounds from triton reactions with the constituents… more
Date: June 1, 1977
Creator: Davis, J. C.; Lefevre, H. W.; Poppe, C. H.; Drake, D. M. & Veeser, L. R.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of large, multifilament Nb/sub 3/Sn conductors with a new 12-Telsa tensile test apparatus

Description: A large cryogenic tensile test apparatus has been constructed at the Lawrence Livermore Laboratory (LLL) as part of the Nb/sub 3/Sn conductor program. This equipment was designed so that mechanical measurements can be made at 300, 77, or 4.2 K and critical current can be measured under simulated operating conditions as a function of the strain on large, prototype conductors for fusion magnets. The maximum operating parameters of the machine are load = 2.23 x 10/sup 5/ N, magnetic field = 12 T, … more
Date: June 20, 1977
Creator: Deis, D. W.; Hirzel, D. G.; Rosdahl, A. R.; Roach, D. R.; Freynik, H. S. Jr. & Zbasnik, J. P.
Partner: UNT Libraries Government Documents Department
open access

Dynamic models, estimation and detection concepts for safeguarding Pu(NO/sub 3/)/sub 4/ storage tanks

Description: The applicability of modern signal processing techniques to the safeguards problem for a plutonium nitrate storage tank is addressed. The techniques involve mathematical modeling, optimal estimation of process variables and the detection of abnormal changes in these variables due to adversary diversion. An example is given which shows overall performance in terms of probabilities of detection versus false alarm probabilities for levels of diversion of 150, 250, and 500 g.
Date: June 1, 1977
Creator: Dunn, D. R.
Partner: UNT Libraries Government Documents Department
open access

Determination of sound velocity in liquid metals at temperatures above 4000 K

Description: Present techniques for measuring sound velocity in liquid metals have been limited by transducers that cannot survive in extreme temperatures for the long periods these techniques require. We are developing an alternative, noncontacting technique that takes very little time (approximately 1 ..mu..s) and can be used at very high temperatures (above 6000 K). We hope to use this method with our isobaric-expansion apparatus, in which we measure the thermal expansion, enthalpy, and temperature of wi… more
Date: June 6, 1977
Creator: Gathers, G. R.; Shaner, J. W.; Calder, C. A. & Wilcox, W. W.
Partner: UNT Libraries Government Documents Department
open access

Case for charmed meson production in e/sup +/e- annihilation at spear

Description: Evidence is presented that a new particle, a narrow resonance of mass 1865 MeV/c/sup 2/, and its associated excited state can be identified with the (D/sup 0/,D/sup +/) and (D*/sup 0/,D*/sup +/) doublets of charm theory. The D production in e/sup -/e/sup +/ annihilation and various properties of the decay modes are considered. 54 references. (JFP)
Date: June 1, 1977
Creator: Goldhaber, G.
Partner: UNT Libraries Government Documents Department
open access

Molecular beam studies on multiphoton dissociation of polyatomic molecules

Description: A study is made of the multiphoton dissociation of SF/sub 6/ and other molecules under the collisionless molecular beam conditions used routinely. The results are unambiguously consistent with a far more orderly picture of the excitation and dissociation process than that suggested previously. It is concluded that although the initial excitation is selective, nearly complete energy randomization must take place in the molecular vibrational degrees of freedom before decomposition. 26 references.… more
Date: June 1, 1977
Creator: Grant, E. R.; Schulz, P. A.; Sudbo, A. S.; Coggiola, M. J.; Shen, Y. R. & Lee, Y. T.
Partner: UNT Libraries Government Documents Department
open access

Biological limiting factors in Ocean Thermal Energy Conversion

Description: Ocean thermal energy conversion (OTEC) is one of several solar energy options being considered by the U.S. Energy Research and Development Administration (ERDA). The OTEC concept utilizes the thermal difference between warm surface and cool, deep water in tropical oceans to operate a heat engine to produce either electricity or energy-intensive chemicals. Several OTEC system designs, both open and closed cycle, have been suggested. It is estimated that by the year 2020, 4 to 6% of the anticipat… more
Date: June 1, 1977
Creator: Gray, R. H.
Partner: UNT Libraries Government Documents Department
open access

LLL development of a combined etch track: albedo dosimeter

Description: The addition of polycarbonate sheet to albedo detectors for electrochemical etching provides a simple, inexpensive way to reduce the spectral sensitivity of the personnel dosimeter without losing the albedo features of sensitivity and ease of automation. The ECEP technique also provides the dosimetrist with the potential for identifying conditions of body orientation that might otherwise lead to significant error in dosimeter evaluation.
Date: June 30, 1977
Creator: Griffith, R. V.; Fisher, J. C. & Harder, C. A.
Partner: UNT Libraries Government Documents Department
open access

Relativistic heavy ion accelerators

Description: There is a growing interest in the scientific community in the use of accelerators to produce relativistic heavy ion beams for a number of purposes. It now appears that relativistic heavy ion collisions may provide an opportunity to study nuclear matter far from equilibrium density, pressure, and temperature. Heavy ion beams can also be used as simulated cosmic rays for astrophysical research and in planning space probes. At present the only relativistic heavy ion accelerator is the Belvalac at… more
Date: June 1, 1977
Creator: Grunder, H. A.; Leemann, C. W. & Selph, F. B.
Partner: UNT Libraries Government Documents Department
open access

Fifth annual conference of the International Nuclear Target Development Society

Description: A separate abstract was prepared for sixteen papers presented at the conference. Abstracts of three papers presented orally at the conference are included in the proceedings. Three papers have been abstracted previously for the data base. For abstracts of these see CONF-761055 in the Report Number Index. (RCK)
Date: June 1, 1977
Creator: Gursky, J.C. & Povelites, J.G. (comps.)
Partner: UNT Libraries Government Documents Department
open access

Shock compression of pyrolytic, ceylon natural, and a hot-pressed synthetic graphite to 120 GPa

Description: Recent improvements have made the two-stage, light-gas gun at Lawrence Livermore Laboratory into a dependable source of very energetic planar shocks. Also, the inclined-prism technique has proved useful in observing anomalous behavior of materials, especially at low pressure. The availability of these improved techniques presented an opportunity to re-examine the low pressure, shock-compression characteristics for graphite and, in a search for an additional transformation, to extend some of the… more
Date: June 6, 1977
Creator: Gust, W. H. & Young, D. A.
Partner: UNT Libraries Government Documents Department
open access

Multiplicity and charged particle emission in relativistic heavy ion collisions. [Cross sections, statistical thermodynamic models]

Description: Single-particle inclusive cross sections of precisely identified fragments are studied together with associated multiplicities of fast charged particles. Neon and argon projectiles are made to bombard uranium, calcium, and aluminium. It is found that all the observed fragment spectra are structureless and more or less exponentially decaying throughout the range of studied fragment masses. A catalogue of experimentally found qualitative features is given and the applicability of simple statistic… more
Date: June 13, 1977
Creator: Gutbrod, H. H.; Gosset, J.; Meyer, W. G.; Poskanzer, A. M.; Sandoval, A.; Stock, R. et al.
Partner: UNT Libraries Government Documents Department
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