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PRELIMINARY RESULTS OF THE SNAP 2 EXPERIMENTAL REACTOR

Description: The operating history of the SNAP 2 Experimental Reactor (SER) and the preliminary results from the testing program are presented. The total energy generated during the life of the reactor was 224,650 kilowatt hours. This is equivalent to approximately one-half year of full-power operation. The methods used to obtain the reactor parameters are also described. The experimental data obtained were generally in excellent agreement with calculated valuess The principal comparisons are tabulated. (auth)
Date: April 1, 1961
Creator: Hulin, M.W. & Beall, J. eds.
Partner: UNT Libraries Government Documents Department

SNAP-2 RELIABILITY PROGRAM

Description: The basic concept of the SNAP 2 reliability program is discussed. The basis for the reliability requirements for SNAP 2 is presented, and the fundamental methods by which these requirements can be accomplished are described. The reliability objectives for the system, a description of basic failure characteristics, and design considerations for reliability margins and component selection are presented, together with test plans for establishing reliability margins and for demonstrating system reliability. (auth)
Date: August 31, 1963
Creator: Burgess, D.S.
Partner: UNT Libraries Government Documents Department

SNAP I POWER CONVERSION SYSTEM PUMP DEVELOPMENT. Period covered: February 1, 1957 to June 30, 1959

Description: S>Pump development for the SNAP I power conversion system is described. A four-vaned impeller pump supplemented by a jet boost stage was selected for development to meet the final design requirements. Information on other designs, pump test facilities, and conclusions are included. (J.R.D.)
Date: June 20, 1960
Partner: UNT Libraries Government Documents Department

SNAP I POWER CONVERSION SYSTEM ALTERNATOR DEVELOPMENT. Period covered: February 1, 1957 to June 30, 1959

Description: Alternator development for the SNAP 1 power conversion system is described. A radial air-gap permanent-magnet 6-pole single-phase 2600-cps alternator, rated at 536 watts, 0.8 power factor, and 115 volts was selected. Discussion of requirements and specifications, design and performance, test facilities, and conclusions are included. (J.R.D.)
Date: June 20, 1960
Creator: Morgan, H.J.
Partner: UNT Libraries Government Documents Department

GPHS-RTGs in support of the Cassini RTG Program. Final technical report, January 11, 1991--April 30, 1998

Description: As noted in the historical summary, this program encountered a number of changes in direction, schedule, and scope over the period 11 January 1991 to 31 December 1998. The report provides a comprehensive summary of all the varied aspects of the program over its seven and a quarter years, and highlights those aspects that provide information beneficial to future radioisotope programs. In addition to summarizing the scope of the Cassini GPHS-RTG Program provided as background, the introduction includes a discussion of the scope of the final report and offers reference sources for information on those topics not covered. Much of the design heritage of the GPHS-RTG comes from the Multi-Hundred Watt (MHW) RTGs used on the Lincoln Experimental Satellites (LES) 8/9 and Voyager spacecraft. The design utilized for the Cassini program was developed, in large part, under the GPHS-RTG program which produced the Galileo and Ulysses RTGs. Reports from those programs included detailed documentation of the design, development, and testing of converter components and full converters that were identical to, or similar to, components used in the Cassini program. Where such information is available in previous reports, it is not repeated here.
Date: August 1, 1998
Partner: UNT Libraries Government Documents Department

General-Purpose Heat Source: Research and development program: Cold-Process Verification Test Series

Description: The General-Purpose Heat Source (GPHS) provides power for space missions by transmitting the heat of {sup 238}Pu decay to an array of thermoelectric elements. Because any space mission could experience a launch abort or return from orbit, the heat source must be designed and constructed to survive credible accident environments. Previous testing conducted in support of the Galileo and Ulysses missions documented the response of GPHSs and individual GPHS capsules fueled with {sup 238}UO{sub 2} ({sup 235}U-depleted) to a variety of explosive overpressure and impact events. In the early 1990s, Los Alamos National Laboratory (LANL) resumed fabrication of {sup 238}UO{sub 2} GPHS pellets. The Cold-Process Verification (CPV) Test Series was designed to compare the response of GPHS heat sources loaded with recently fabricated hot- and cold-pressed {sup 238}UO{sub 2} pellets to the response of urania pellets used in the Galileo and Ulysses performance tests. This report documents eleven bare-capsule impacts and one impact of a fully loaded GPHS module. All of the failures observed in the bare-clad impact tests were similar to failures observed in previous safety tests. No failures occurred in the module impact test.
Date: June 1, 1996
Creator: Reimus, M.A.H. & George, T.G.
Partner: UNT Libraries Government Documents Department