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Materials Engineering Laboratory interim report, LF-8 and LF-9 support pad fabrication

Description: This project was for the fabrication of 50 LF-8 and LF-9 support pads (clamshells) which would conform to the Los Alamos Scientific Laboratory (LASL) drawing provided in Appendix A of this report. Discussions on this contract were initiated in early October and involved delivery of all the pads by January 31, 1977. The project was modified to deliver only 10 pads by the above date. However, since the period encompassed Thanksgiving.and Christmas shutdowns, it was decided that delivery of four units by February 11, 1977 would be satisfactory to all concerned. The remainder would follow on a timely basis. This report outlines the status of the project at the present time. The data are divided into the following categories for clarity purposes: Mold master definition and fabrication, Process drawings, and Mold and piece part fabrication.
Date: March 1, 1977
Creator: Creed, K.E.
Partner: UNT Libraries Government Documents Department

Nevada Test Site, Nye County, Nevada. Final environmental impact statement

Description: This environmental statement for the Nevada Test Site (NTS) considers underground nuclear detonations with yields of one megaton or less, along with the preparations necessary for such detonations. The testing activities considered also include other continuing and intermittent activities, both nuclear and nonnuclear, which can best be conducted in the remote and controlled area of the Nevada Test Site. These activities are listed, with emphasis on weapons testing programs which do not remain static.
Date: September 1, 1977
Partner: UNT Libraries Government Documents Department

Investigation of the seismicity at regional and teleseismic distances following underground nuclear detonations. Final technical report

Description: The main emphasis of the investigation was to determine the seismicity of the Nevada Test Site area during a time period which encompassed a lull in the testing program. The time period studied extends from April 1, 1973 to October 1, 1975. The aftershock sequence of nuclear shots fired on Pahute Mesa during late 1975 and early 1976 were also included.
Date: December 31, 1977
Creator: Willis, D E; Stubenrauch, A & Willis, M E
Partner: UNT Libraries Government Documents Department

Digital SLIFER Recorder, Model A. [Underground nuclear explosions]

Description: The Digital SLIFER Recorder (DSR) is an instrument that records a time-varying frequency signal in the range from 700 kHz to 1500 kHz with an amplitude greater than 200 mV. This signal is referenced to an input fiducial marker, and recording is initiated by an increase in the frequency of the signal. The primary purpose of this instrument is to record data from the SLIFER system. The DSR records 512 samples after the record trigger signal, with a sample interval of 50 ..mu..s (for a total recording time of 25.55 ms). The measurement essentially uses a 20-cycle period-averaging counter technique.
Date: November 1, 1977
Creator: Breding, D.R.; Fogel, D.; Loukota, J.J.; Worthen, G.S. & Watterberg, J.P.
Partner: UNT Libraries Government Documents Department

Avalanche transistor pulser for fast-gated operation of micro-channel plate image-intensifiers

Description: Transistors operated in the avalanche mode are employed to generate a 1000 volt 10 to 30 nsec wide pulse with less than 4 nsec rise and fall times. This pulse is resistively attenuated to approximately equal to 270 volts and drives the image intensifier tube which is a load of approximately equal to 200 pf. To reduce stray inductance and capacitance, transistor chips were assembled on a thick-film hybrid substrate. Circuit parameters, operating conditions, and coupling to the microchannel plate image-intensifier (MCPI/sup 2/) tube are described. To provide dc operating voltages and control of transient voltages on the MCPI/sup 2/ tube a resistance-capacitance network has been developed which (a) places the MCPI/sup 2/ output phosphor at ground, (b) provides programmable gains in ''f-stop'' steps, and (c) minimizes voltage transients on the MCPI/sup 2/ tube.
Date: January 1, 1977
Creator: Lundy, A.; Parker, J.R.; Lunsford, J.S. & Martin, A.D.
Partner: UNT Libraries Government Documents Department

Stability of flow from a nuclear cavity. Final report. [GANDLF]

Description: The stability of flow from a nuclear cavity was examined. The flow of interest consists of air and steam at high pressure and temperature moving through a porous medium. The steam condenses at a moving front. The stability of the flow was analyzed using the normal mode method and a program was written to perform the necessary calculations. Results of the computer calculations show that the flow of interest is stable and any instabilities that occur will decay slowly. Stability was influenced by gravity, fluid mobilities, and condensation. It was found that the stabilizing effect of conductivity is only important at negligibly small wavelengths.
Date: July 1, 1977
Creator: Morrison, F.A. Jr.
Partner: UNT Libraries Government Documents Department

Estimate of earth media shear strength at the Nevada Test Site

Description: A method is presented of estimating the effective shear strength of the fractured rock that surrounds a nuclear detonation. To do this, we measure the cavity radii from previous detonations. We also use numerical computer codes to model the explosion phenomenology and develop the functional relationship between the normalized cavity displacement and the normalized shear strength of the rock. In this sense, the computer codes serve as replica models that are dimensionally analyzed to interpret the field experience. We separate the effects of gravity and overburden pressure from the effects of the material properties and give scaling laws for each. We have analyzed approximately 300 nuclear detonations at the Nevada Test Site (NTS) and have found that the most frequent shear strengths are between 0.020 and 0.060 kbars. They are also essentially independent of the depth-of-burial ranges considered. We obtained good agreement between predicted shear strengths and those measured from core samples for different areas at the Nevada Test Site.
Date: November 3, 1977
Creator: Terhune, R.W. & Glenn, H.D.
Partner: UNT Libraries Government Documents Department

Preliminary code development for seismic signal analysis related to test ban treaty questions

Description: Forensic seismology, from a present day viewpoint, appears to be divided into several areas. Overwhelmingly important, in view of current Complete Test Ban (CTB) discussions, is the seismological study of waves generated in the earth by underground nuclear explosions. Over the last two decades intensive effort has been devoted to developing improved observational apparatus and to the interpretation of the data produced by this equipment. It is clearly desirable to extract the maximum amount of information from seismic signals. It is, therefore, necessary to quantitatively compare various modes of analysis to establish which mode or combination of modes provides the most useful information. Preliminary code development for application of some modern developments in signal processing to seismic signals is described. Applications of noncircular functions are considered and compared with circular function results. The second portion of the discussion concerns maximum entropy analysis. Lastly, the multivariate aspects of the general problem are considered.
Date: January 1, 1977
Creator: Brolley, J.E.
Partner: UNT Libraries Government Documents Department

Rainout assessment: the ACRA system and summaries of simulation results. [Computer systems to estimate threats from precipitation scavenging of radioactive debris clouds from nuclear weapons]

Description: A generalized, three-dimensional, integrated computer code system was developed to estimate collateral-damage threats from precipitation-scavenging (rainout) of airborne debris-clouds from defensive tactical nuclear engagements. This code system, called ACRA for Atmospheric-Contaminant Rainout Assessment, is based on Monte Carlo statistical simulation methods that allow realistic, unbiased simulations of probabilistic storm, wind, and precipitation fields that determine actual magnitudes and probabilities of rainout threats. Detailed models (or data bases) are included for synoptic-scale storm and wind fields; debris transport and dispersal (with the roles of complex flow fields, time-dependent diffusion, and multidimensional shear effects accounted for automatically); microscopic debris-precipitation interactions and scavenging probabilities; air-to-ground debris transport; local demographic features, for assessing actual threats to populations; and nonlinear effects accumulations from multishot scenarios. We simulated several hundred representative shots for West European scenarios and climates to study single-shot and multishot sensitivities of rainout effects to variations in pertinent physical variables.
Date: September 1, 1977
Creator: Watson, C.W.; Barr, S. & Allenson, R.E.
Partner: UNT Libraries Government Documents Department

DENBIG and DARN. Codes for the reduction of digital pinex data

Description: Code DENBIG was written to reduce the digital pinex data received from the Nevada Test Site (NTS) and Transient Reactor Test Facility (TREAT) experiments. Output modes are density plots, contour plots, splatter plots, equivalent radius calculations, line cuts, and reduced data in matrix form. Provisions are included to incorporate subtraction of dry-run data, transfer function corrections, and pinhole absorption corrections. Code DARN processes pinex data in which electromagnetic pulse shifts have eliminated sync tips or caused unsaturated amplitude variations. These induced problems are eliminated by clamping the data, point by point, to dry-run data. The DARN output modes are subset of those of DENBIG. The data frame established by DARN can be filed for subsequent input to DENBIG. Program descriptions and operating instructions are discussed. 19 figures.
Date: October 1, 1977
Creator: Beyer, L.M.
Partner: UNT Libraries Government Documents Department

Rock equation of state: a constitutive computer model

Description: A constitutive model for a rock equation of state was developed in HEMP and CEL-HEMP computer codes. The model includes the mechanical and thermal properties of soil, such as elasticity, pore closure, compaction, and vaporization. Three test problems were computed using the equation of state: ground motion following the LATIR event, impact vaporization of preheated plates, and surface motion produced from exploding a 3.7-kg(10-lb) charge at a depth of 6.5 m. Agreement between our computations from the model and actual measurements is remarkably close.
Date: August 24, 1977
Creator: Kamegai, M.
Partner: UNT Libraries Government Documents Department

Properties of Kel F-800 polymer

Description: Kel F-800 fluorocarbon polymer has been selected as the binder for the TATB explosive in the B77 bomb. Kel F-800 is a 3M copolymer derived from the monomers chlorotrifluorethylene (CTFE) and vinylidine fluoride (VF/sub 2/). To understand and define Kel F-800 in relation to its intended use, as well as to generate guidelines for controlling the WR material, a thorough evaluation of its properties and the expected variations from different production lots was made. The research showed that Kel F-800 varies in both mechanical and thermal properties because of its high Tg (glass transition temperature) and because of its crystallinity. However, no evidence that these variabilities are detrimental to any of the end-use properties of Kel F-800 was found.
Date: July 21, 1977
Creator: Cady, W.E. & Caley, L.E.
Partner: UNT Libraries Government Documents Department

Digital RLC analysis of CDU fireset x-units

Description: An accurate and repeatable technique has been developed for quantitatively determining the dynamic resistance, inductance, and capacitance (RLC) of CDU Fireset X-units by digital analysis of the output current waveform. The waveform is digitized with 8 bit resolution at a 10 ns sample rate. A calibration file provides correction for attenuator and digitizer errors. Data accuracy is optimized by software filtering to minimize the digitizing noise component. R, L, and C are derived by selecting any four waveform coordinates as limits for a series of multiple numerical integrations. The integrals become coefficients for a system of linear equations which are solved simultaneously to obtain the circuit impedance. The approach is independent of circuit damping, eliminates the need for determining the waveform starting point, and is accurate to 1 percent in the presence of noise. The technique has been successfully employed at Bendix to identify defects and variations in components and processes used in the manufacture of X-unit assemblies.
Date: January 1, 1977
Creator: Bennett, A.G.
Partner: UNT Libraries Government Documents Department

Development of the MC3133 reefing line cutter

Description: A pyrotechnic actuated reefing line cutter has been developed which, in response to an incoming programmable time delayed electrical firing signal, severs a nylon or Kevlar parachute reefing line following parachute deployment. The design objectives and final design concept which evolved are described. First order approximations and parameter studies leading to a preprototype design are presented. Significant evaluation studies that resulted in the selection of boron/calcium chromate for the initiating charge and titanium subhydride/potassium perchlorate for the output charge are discussed in detail. Final design verification testing data show that the reefing line cutter will meet functional requirements after the following sequential environments: thermal shock, --54/sup 0/C to 90/sup 0/C; mechanical shock, 9806 m/s/sup 2/, 2 ms duration; vibration, 98 m/s/sup 2/, 26-2000 Hz; and linear acceleration, 1960 m/s/sup 2/ for two minutes.
Date: September 1, 1977
Creator: Craig, J.R.
Partner: UNT Libraries Government Documents Department

Plutonium and americium concentration along fresh-water food chains of the Great Lakes, U. S. A. Progress report, July 1976--September 30, 1977

Description: The primary purpose of studying the biogeochemical behavior of transuranic radionuclides in large freshwater lakes began with studies of the distribution of these radionuclides, essentially introduced from the fallout of atmospheric nuclear weapons tests, in Lake Ontario. The recognition that an additional source of supply of these nuclides to Lake Ontario (subsequent to their release into Lake Erie) existed in the form of leakage from the Nuclear Fuel Services reprocessing plant at Springville, New York, led to expansion of the program to include sampling at the eastern end of Lake Erie. Much of the program is devoted to studies of the distribution of these nuclides in the lake sediments as they appear to be a major repository for transuranics in freshwater lakes. The extent to which this is a temporary or permanent repository is illuminated by studies of transuranic distributions in the lake waters and biota.
Date: January 1, 1977
Creator: Bowen, V.T.
Partner: UNT Libraries Government Documents Department

SLIFER Decipher

Description: The SLIFER Decipher (SD) is a digital instrument that records a time-varying frequency signal in the range from 700 kHz to 1500 kHz with an amplitude greater than 200 mV. This signal is referenced to an input fiducial marker. The primary purpose of this instrument is to reduce data recorded on magnetic tape from the SLIFER system used in underground nuclear tests. The SD records 512 samples after the fiducial signal, with a sample interval of 50 ..mu..s (for a total recording time of 25.55 ms). The measurement essentially uses a 20-cycle period-averaging counter technique.
Date: October 1, 1977
Creator: Breding, D.R.; Worthen, G.S.; Loukota, J.J.; Fogel, D. & Watterberg, J.P.
Partner: UNT Libraries Government Documents Department

TATB formulation study. Final report

Description: The physical characteristics of several TATB formulations were investigated for use in booster pellets. These formulations included fine particle size TATB, without binder and with 1% Kel-F binder and 2% Kel-F binder. Corresponding tests were performed on RX-03-BB (7.5% Kel-F) for comparison. Test samples from each formulation were prepared for thermal cycling, moisture resistance, compression, indirect tensile and density gradient.
Date: June 1, 1977
Creator: Crutchmer, J. A.
Partner: UNT Libraries Government Documents Department

TATB PBX development (particle size)

Description: Pantex formulated RX-03-BB TATB PBX now being produced has physical properties which are acceptable and consistent from lot-to-lot and batch-to-batch. The latest eight large lots, which varied in size from 225 to 544 kg, have consistent tensile strengths and tensile strains in excess of 0.3 percent. The particle size distributions of the TATB lots used were correlated to physical properties by subjecting the data to a least square linear regression. The physical properties of the PBX are not strongly affected by the TATB particle size distribution. A comparative physical properties test series conducted between Pantex and LLL showed that the sets of data are in close agreement.
Date: March 1, 1977
Creator: Osborn, A. G.; Stallings, T. L. & Johnson, H. D.
Partner: UNT Libraries Government Documents Department

How to estimate the solubility of an insoluble compound: 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)

Description: A simple method for estimating the solubility of TATB in various solvents is presented. We consider it unlikely that a solvent will be found in which TATB is more soluble than 0.1 percent (w/v). Exceptions are the so-called superacids in which the solubility of TATB exceeds 20 percent (w/v).
Date: April 1, 1977
Creator: Selig, W.
Partner: UNT Libraries Government Documents Department

Installation of horizontal seismometers in the LLL seismic net and their calibration. [Measurement of ground motion from underground nuclear explosions at Nevada Test Site]

Description: The Lawrence Livermore Laboratory seismic net was upgraded by installing two horizontal seismometers at each of the four LLL stations. These seismometers record radial and transverse ground motion from underground nuclear explosions at the Nevada Test Site and complement the vertical components which were installed several years ago. Each station now monitors three orthogonal components of ground velocity over a broad frequency band.
Date: January 25, 1977
Creator: Denny, M. D.
Partner: UNT Libraries Government Documents Department

Project Rulison: well plugging and site abandonment. Final report

Description: This document is designed to be used in conjunction with NVO 174 (Rev. 1), the Project Rulison Well Plugging and Site Abandonment Plan, August 1976. NVO 174 (Rev. 1) describes in detail the methods and procedures that were to be used in implementing a plugging and abandonment procedure for the Rulison wells and site. This final report compares the planned actions with the actual disposition of the various tasks and operations. Those activities which departed substantially from the original plan of operation are described along with the operations that occurred as planned. The disposal of all radiological materials is discussed comprehensively in the Rulison Radiation Contamination Clearance Report PNE-R-68 dated June 1977 by the Eberline Instrument Corporation.
Date: September 1, 1977
Partner: UNT Libraries Government Documents Department

Adducts of benzotrifuroxan (BTF)

Description: The preparation and some properties of adducts of benzotrifuroxan (BTF) are reported. The adducts contain one or two molecules of the adduct-forming compound (AFC) per molecule of BTF. All AFC's contain an oxygen atom.
Date: April 4, 1977
Creator: Selig, W.
Partner: UNT Libraries Government Documents Department

Health and Safety Laboratory environmental quarterly. Final tabulation of monthly /sup 90/Sr fallout data: 1954--1976

Description: This report presents the monthly /sup 90/Sr deposition data derived from a global network of stations started in 1954. This program was carried out to assess the distribution patterns and inventory the amount of fallout of radionuclies from atmospheric nuclear tests. In 1976, monthly deposition rates had diminished to the point where measurable levels of /sup 90/Sr were rarely observed.
Date: October 1, 1977
Partner: UNT Libraries Government Documents Department

TATB formulation processes

Description: The effects of several processing parameters were evaluated. Included were TATB particle size, processing time, batch concentration, binder treatment, granule size and others. Batch concentration and granule size emerged as the most important factors affecting mechanical response.
Date: February 1, 1977
Creator: Osborn, A. G.
Partner: UNT Libraries Government Documents Department