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Requirements Definition and Preliminary Design of a Photovoltaic Central Station Test Facility: Final Report
Abstract: Bechtel National, Inc. has conducted a study of the requirement for, and a preliminary design of, a photovoltaic central station test facility.
Initial Peak Surge Current Detection Circuits
Test requirements for several components specifies that surge currents be monitored to determine if the initial peak surge current exceeds a certain predetermined amplitude. This report describes and evaluates two circuits which were developed by Organization 2451 to meet this requirement in production testing.
The Cumulative Binomial Distribution Computer
Acknowledgement: The cumulative Binomial Distribution Computer incorporates valuable suggestions made by supervision and members of the Sandia Corporation Reliability Department.
Aerospace Nuclear Safety: October 1 - 4, 1963
Proceedings on aerospace nuclear safety.
A Mathematical Model For an Associative Memory
Abstract: A mathematical model for an associative memory is proposed which uses associative addressing and distributed storage.
A Confidence Limit Computer
Introduction: Confidence limits as a mathematical tool are applicable to many development engineering and production engineering situations. In order to make confidence limits readily available to engineers, a computer was designed which will approximate certain confidence limits.
Phantom Gage Dimensioning (Combined Part/Gage specifications)
Abstract: This memorandum discusses a new design definition technique, requiring no standard, which pictorially shows part and gage limits on the same drawing. When functional gages, test fixtures, or optical chart gages are the selected inspection method, design, manufacturing process, and gage engineers can use these drawings directly to replace the usual standards-based drawings. In essence, this advanced technology visually describes true position dimensioning and tolerancing. It enables product designers to directly control the acceptance process.
Shear Strength of Simply Supported Prestressed Concrete Beams Having Web Reinforcement
Abstract: Tests were made on 24 simply supported, post-tensioned, end-anchored, prestressed concrete beams with and without web reinforcement.
Pressure Calibration of a Reflection Plane in the Sandia 12-inch Transonic Wind Tunnel (Program III-40)
Abstract: Results of pressure tests of a reflection plane in the Sandia 12-inch transonic wind tunnel to determine lateral and longitudinal Mach distribution over the plate at 0.5≤M≤1.30 are presented.
Re-entry Flight Demonstration Number One (RFD-1): Design, Development, and Performance of the Re-entry Vehicle
This report documents the design, development, and performance of the flight vehicle for Re-entry Flight Demonstration Number One (RFD-1).
A Pulse Ammeter
A quantizing pulse ammeter has been designed which brackets an input pulse current peak between two preset current levels. These levels are easily selected by calibration circuits contained on the chassis. Readout is presented in the form of a Nixie visual display as well as an output which is suitable for automatic data recording.
Craters From Four Equal Charges in a Horizontal Square Array
Craters were observed resulting from square arrays of 64-pound charges at various spacings and depths. The closest spacings yielded craters very like those from single 256-pound charges, while wider spacings yielded craters more or less square in shape and with a mound or pier at the center. Generally, the areas so uncovered were greater than for single 256-pound charges, except for very deep charges. Volumes, too, were enhanced by this configuration by as much as a factor of three. If the same factor is maintained for nuclear charges, the cost per unit volume of a crater from such an array will be within 20 percent of that for a single charge.
Shock Signatures and Spectra from Railroad Switching Loads
Abstract: This report describes two tests made to obtain data on the loads that equipment is subjected to during railroad switching.
The Use of Compensation With Directional Couplers
Abstract: The accurate measurement of voltage standing wave ratio (VSWR) is of prime importance in the production of microwave systems. The work reported in this memorandum was undertaken in the development of a faster system for measuring VSWR.
Results of a Force Test of Four Configurations of the Hi-Lo Instrumented and Chaff Rockets in the Sandia Corporation 12 x 12 inch Transonic Wind Tunnel (Program III-46)
Abstract: Force, moment, and center of pressure information are presented for four models of the Hi-Lo configuration.
Vapor Pressures of the Rare Earths
Abstract: This report presents the vapor pressures versus temperature data graphically for the rare earth elements, yttrium and scandium.
An Aid to Printed Circuit Layouts Using the IBM-704 Computer
Abstract: This memorandum presents the possible applications and instructions for using REDCROSS, an IBM-704 computer program.
Re-entry Flight Demonstration Number One (RFD-1): Final SNAP-10A Safety Flight-Test Plan
Abstract: This report constitutes the RFD-1 Safety Flight Plan for investigating the disassembly, distraction, and disposal of the SNAP-10A reactor during re-entry.
Re-entry Flight Demonstration Number One (RFD-1): Preflight Disassembly Analysis and Observed Disassembly of the Simulated SNAP-10A Reactor
Abstract: This report describes the SNAP-10A Simulated Test Reactor, the test philosophy of Re-entry Flight Demonstration Number One, the analytical analysis of reactor disassembly, and the results of the flight test.
High Velocity Shock Testing, Equipment and Methods
The need for special high velocity shock testing is pointed out and equipment that has been developed to meet these needs is discussed. The concept of velocity-change and its importance in shock-testing technology is brought out. The three types of equipment discussed are: accelerated drop testers, pneumatic actuators, and air guns. Examples of each type and their capabilities and limitations are presented.
A High-Voltage Pulse Generator for Testing Dielectric Samples
Abstract: The purpose of this report is to describe the problems inherent to general dielectric strength measurements, and to act as a guide in establishing a method for pulse dielectric strength measurements.
Proceedings of the International Symposium for Packaging and Transportation of Radioactive Materials: 1965
Forword: The International Symposium for Packaging and Transportation of radioactive materials held at Albuquerque, New Mexico, January 12 to 15, 1965, was a joint effort on the part of the Sandia Corporation, the Albuquerque Operations Office, and the Headquarters, U.S. Atomic Energy Commission.
Curves for Estimating Low Blast Over-Pressure
A plot of overpressure versus distance is presented for the fractional psi pressure level. The plot provides a rapid and simple means of estimating the permissible yield at any distance from settled areas.
A Transistorized Reactivity Measurement System
An all-transistor system has been developed to be used in measuring the reactivity of the reactor in the Sandia Engineering Reactor Facility. In operation, the system triggers a pulsed neutron source (PNS) in the reactor and counts the resulting neutron flux, thus giving a measure of the time constant of the reactor. The counting is done in eleven time-sequenced counting channels. The reactor time constant is a measure of the reactor reactivity.
Calibration of a Peak Current Gage Developed at Sandia Corporation
Abstract: Methods are presented for calibrating a peak current gage which was developed at Sandia in the spring of 1953.
A Small-scale Investigation of the Possibility of Constructing Low-Relief Earth-Fill Dams Using Nuclear Explosives
The experiment described herein has shown that the concept of low dams produced by ballistic collision of ejecta from simultaneous detonation of properly spaced parallel rows of charges is a feasible one. Rows of 8-pound charges were buried 3 feet deep with 4-foot spacing between charges. When two such rows of charges were placed parallel and 17.5 feet apart, the maximum height of the "dam" was achieved. The spacing of 17.5 feet between rows corresponds to 4.7 times the crater radius of one 8-pound charge at the burial depth which maximizes the single-charge crater. The extrapolation of these results to larger explosions is discussed. The height decreases and the width increases as the spacing between rows is further increased. The mass of material in the "dam" cannot exceed that in the crater of one of the rows. At the spacing between rows which maximizes height, the volume of the "dam'' is about 50 percent of maximum volume theoretically achievable. At wider spacings, the volume increases to 75 percent.
Evaluation of Plated-Through Connections for Printed Circuit Boards
The present report describes the evaluations conducted with plated-through connections produced by techniques used by some of the prominent fabricators of printed circuits.
Final Report on Re-entry Flight Demonstration Number Two
Abstract: RFD-2 was the second of Sandia's operational safety flight tests of systems for nuclear auxiliary power.
Re-entry Flight Demonstration Number One (RFD-1): Data Book
Re-entry flight demonstration number one (RFD-1) was launched on May 22, 1963 from the Scout launch complex at NASA Wallops Station, Wallops Island, Virginia.
Vapor Pressures of the Rare Earths
Abstract: This report presents the vapor pressures versus temperature data graphically for the rare earth elements, yttrium and scandium.
A Method for Performing a Human-Factors Reliability Analysis
Foreword: There has been relatively little work reported on deriving quantitative estimates of the degradation to a man-machine system resulting from human errors. One approach, used in the Reliability Department of Sandia Corporation, is presented here as an example of how such estimating can be done.
Automatic Tester for Electrical Fuses
Abstract: This technical memorandum describes an automatic tester and recorder as it is used in obtaining fusing time information from electrical fuses for subsequent analysis in the IBM 704 computer.
Air-Gun Studies of Ferroelectric Materials (Second Printing)
Specimens of two ferroelectric materials, barium titanate and lead-zirconate titanate, have been subjected to high dynamic stresses by impacting them with a projectile accelerated by an air gun. The purpose of these tests was to supplement information previously obtained using high explosives to stress the ferromagnetic materials.
Positional Tolerancing at Sandia Corporation
Abstract: "This brochure presents a brief introduction to the Positional Tolerance Method of DImensioning as employed by Sandia Corporation. The emphasis is placed on the elimination of ambiguities and increase in tolerances provided by this method as compared to the older, bilateral method."
The Sandia Corporation 12-inch Transonic Wind Tunnel Analog-to-Digital Data Gathering System
Abstract: This memorandum describes the components and presents the operating and maintenance instructions for the 12-inch transonic wind tunnel analog-to-digital data gathering systems.
APOTA (Automatic Positioning of Telemetering Antennas)
This report presents a description of and operating instructions for APOTA--a device which automatically tracks any signal-emitting source within the 190 to 250 MC band. APOTA is especially useful for telemetering applications.
Prediction of Shock Response
Abstract: A method is presented of predicting the shock response of a friction-damped vibratory system.
Re-entry Flight Demonstration No. 1 (RFD-1): Optical Data and Fuel-Element Experiment
This report on the RFD-1 optical data and external fuel-element experiment includes a description of the instruments and test components used, a presentation of the data obtained, an explanation of the methods of data reduction employed, and a statement of the conclusions derived. It covers the theory, design, qualification tests, flight-test data, and results of the external fuel-element experiment. Also presented is a theoretical analysis of observed versus predicted ablation times and altitudes for the external fuel elements. In addition, this report presents recommendations for improvements to data acquisition and reduction methods in future, similar flight tests.
IBM Problem M Curves
Abstract: Presented here are working graphs of pressure, density, velocity, and temperature from the Los Alamos Scientific Laboratory calculations (IBM Problem M) of a spherically symmetric explosion in a homogeneous atmosphere.
Re-entry Flight Demonstration Number Two: Interim Flight-Test Report
Abstract: This report presents a summary and brief evaluation of the RFD-2 flight-test data reduced as of December 16, 1964.
A Digital Comparator
A digital comparator has been designed to flag data which goes above a maximum limit or below a minimum limit.
Wind Tunnel Study of the Influence of Orifice Geometry and Flow Rates on the Measured Pressure Error of a Static Pressure Probe at Mach 3
Abstract: Tests were conducted in the Jet Propulsion Laboratory's 20-inch Supersonic Wind Tunnel to determine the effect of hole-spacing geometry on the measured pressure error due to "breathing" for a pressure-sensing probe at Mach 3.01.
Positional Tolerancing at Sandia Corporation
Abstract: "This report presents a brief introduction to the Positional Tolerance Method of DImensioning as employed by Sandia Corporation. The emphasis is placed on the elimination of ambiguities and increase in tolerances provided by this method as compared to the older, bilateral method" (p. 2).
Note on the Numerical Evaluation of Integrals of the Form [integral] [superscript infinity] [subscript infinity] f(x) [golden ratio constant] (x) dx, with Particular Reference to the Determiniation of the Expectation of a Function of a Normally Distributed Random Variable
Abstract: A method is given for the rapid and accurate numerical integration of integrals of the form [integral] [superscript infinity] [subscript infinity] f(x) [golden ratio constant] (x) dx, where f(x) is "smooth."
Infrared Spectrophotometric Analysis of Urethane Compounds
Abstract: This report presents a simple, quantitative analytical method for determining the percent of a particular group or structure within a urethane compound by means of the infrared spectrophotometer.
Preliminary Report on Magnetogasdynamic Aspects
Report describing studies on magnetogasdynamic aspects, presented in three sections: a summary of relevant magnetofluidmechanic fundamentals; a review of relevant literature on flow modification in magnetofluidmechnics; and the results of analytical investigations on highly restricted magnetofluidmechanic flows.
Neutron Flux and Spectra Measurements in the Sandia Pulsed Reactor Facility (SPRF)
Introduction: Neutron measurements were made in the pulsed reactor building and on the safety screen of the pulsed reactor in order to determine the neutron yield of the reactor as a function of (1) distance from the reactor centerline, (2) direction in the reactor building, and (3) position on the reactor safety screen.
Physical Properties of Fused Salt Mixtures
Foreword: The purpose of the present work was to collect and tabulate data on fused salt mixtures.
Analysis of the Mount Laguna Photovoltaic Cell Failure
From summary: The purpose of this analysis is to provide photovoltaic (P/V) system design and field engineers with an understanding of the primary factors which can cause individual P/V cells in a module or an array to be forced into reverse bias and eventual failure and to provide guidelines for the adequate protection of the cells.
Low-Cost Photovoltaic Cell Mount Study
From abstract: This report is a technical and economic evaluation of five representative cell laydown techniques with the final goal being a determination of which was most promising from a cost performance basis.