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SNAP III Final Performance Test Summary

Description: SNAP III, a 3- to 5-watt electrical generator, was designed as a proof- of-principle device in the development of radioisotope-powered thermoelectric power-conversion systems. A program involving five development areas was employed in achieving this aim. These areas were: (1) generator development, fuel encapsulation, and handling techniques; (2) system safety studies; (3) system dynamic tests; (4) system parametric performance tests; and (5) system life tests. Particular attention was given to fuel encapsulation and handling techniques, system safety studies, system parametric performance tests, and system life tests. (auth)
Date: August 1, 1960
Creator: Long, J. D.
Partner: UNT Libraries Government Documents Department

13-Watt Curium-Fueled Thermoelectric Generator for Hard Lunar Impact Mission. Final Report-Subtask 5.8

Description: Results of a conceptual design study for a curium powered thermoelectric generator of minimum size and weight which is capable of sustaining hard impact is presented. The generator produces a minimum of 13 watts of d-c power at 3 volts, and weighs 6.2 pounds excluding shielding. (J.R.D.)
Date: August 1, 1960
Creator: Bloom, J. L.
Partner: UNT Libraries Government Documents Department

Advanced Thermoelectric Power System. Final Report

Description: Development of a radioisotope-fueled thermoelectric power-conversion system for the SNAP program is discussed. The generator operates at somewhat less than 1% over-all efficiency, has a power output of approximately 1.45 watts, and has a specific power of 0.l42 watts per pound. The power-flattening device did not perform as expected. A second generator is also described which produces a maximum power of 1.6 watts, has a maximum efficiency of 1.20%, and has a specific power of 0.32 watts per pound (exclusive of the weight of the heat source). (auth)
Date: January 1, 1960
Creator: Harvey, R. J.
Partner: UNT Libraries Government Documents Department

Curium Fueled Generators for Lunar and Space Missions. Preliminary Safety Analysis Report

Description: Two thermoelectric generators that use Cm/sup 242/ as the heat source are described. One, designed for a lunar 12,480 c. The second, designed for a satellite or space probe mission, is fueled with 6.18 g having an activity of 20,400 c. Preparation of the fuel, assembly of the generator, and the launching of the vehicle are considered. Accidents that may occur in the launching of the vehicle are analyzed and the fate of the fuel in the event of an aborted mission or upon reentry of the vehicle after the completion of a mission are determined. (W.D.M.)
Date: June 1, 1960
Creator: Riggs, C. O.
Partner: UNT Libraries Government Documents Department

Final Safety Evaluation of a Ten Watt Strontium-90 Fueled Generator for a Deep Sea Application-SNAP 7E

Description: A safety evaluation of the SNAP 7E thermoelectric generator system is described. Analyses were performed to assess the radiobiological effects in event of a fuel release and the shielding was evaluated to determine the safe working limits for personnel. The entire evaluation is based on a fuel loading of 31,000 curies of radiostrontium. It is concluded that the safety criteria are met and there is reasonable assurance that this generator is safe for its intended mission. (J.R.D.)
Date: May 1, 1962
Creator: Berkow, H. N. & Kelly, V. G.
Partner: UNT Libraries Government Documents Department

Interim Report on Safety Procedures for the Task 2 Thermoelectric Generator

Description: Operational hazards associated with the use of a radioisotope-fueled auxiliary power unit for a satellite mission are evaluated. The entire fabrication-to-flight and/or retrieval and disposal sequence is examined and safe handling procedures suggested. The design and operation of the Task 2 thermoelectric generator is discussed. (C.J.G.)
Date: March 15, 1960
Creator: Klein, L. T.
Partner: UNT Libraries Government Documents Department

DIRECT ENERGY CONVERSION DEVICES. A Literature Search

Description: A bibliography comprising 208 unclassified references is presented on nuclear direct energy conversion devices. Major emphasis is placed on auxiliary power devices suitable for use in satellites including reports on nuclear batteries, thermoelectric cells, thermionic conversron and aspects of the SNAP program. (J.R.D.)
Date: March 1, 1961
Creator: Raleigh, H.D. comp.
Partner: UNT Libraries Government Documents Department

Statistical Analysis of SNAP 10A Thermoelectric Converter Element Process Development Variables

Description: Statistical analysis, primarily analysis of variance, was applied to evaluate several factors involved in the development of suitable fabrication and processing techniques for the production of lead telluride thermoelectric elements for the SNAP 10A energy conversion system. The analysis methods are described as to their application for determining the effects of various processing steps, estabIishing the value of individual operations, and evaluating the significance of test results. The elimination of unnecessary or detrimental processing steps was accomplished and the number of required tests was substantially reduced by application of these statistical methods to the SNAP 10A production development effort. (auth)
Date: December 15, 1962
Creator: Fitch, S. H. & Morris, J. W.
Partner: UNT Libraries Government Documents Department

RADIOISOTOPE FUELED AUXILIARY POWER UNIT. Quarterly Progress Report No. 7, July-September 1958

Description: Progress made in the development of SNAP-1 and -3 is reported. SNAP-1 development reported includes: boiler development, fuel development, properties of cerium dioxide, materials corrosion, power conversion system development, shielding analysis, hazards evaluation, and ground test development. SNAP-3 development includes: power conversion analysis, thermoelectric generator development, and fuel element development. Information is given on the handling and transportation equipment for SNAP-1. (N.W.R.)
Date: October 31, 1963
Partner: UNT Libraries Government Documents Department

THE CESIUM-137 POWER PROGRAM. Quarterly Report No. 3

Description: Progress made in the development of the Cs/sup 137/ fueled thermoelectric generator for marine power applications is reported. Information is given on thermoelectric generator design, shielding, power conversion system, hazards evaluation, fuel element forming and cladding, fabrication, and heat transfer. Cs/sup 137/ energy calculations are presented along with shielding calculations. The development and fabrication of cesium polyglass for fuel application are included. (N.W.R.)
Date: October 31, 1961
Partner: UNT Libraries Government Documents Department

SNAP 7 Program Task 8--Strontium-90 Fueled Thermoelectric Generator Development. Quarterly Progress Report No. 3, May 1, 1961 Through July 31, 1961

Description: The SNAP 7 program is being conducted for the purpose of developing 4 radioisotope fueled thermoelectric power generation systems. An important phase of this program is the processing of Sr/sup 90/ into heat sources for these systems. The thermoelectric reliability breadboard model and the operating model of the 10-watt thermoelectric generator were assembled and prepared for tests. The SNAP 7B and 7D 60-watt thermoelectric generators were designed, materials were received, and fabrication of components was initiated. Fuel process engineering, nuclear chemistry audit, and manufacturing fuel processing equipment achievements are discussed. (M.C.G.)
Date: October 31, 1962
Creator: West, W.
Partner: UNT Libraries Government Documents Department