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SNAP II REACTOR CORE MATERIALS

Description: A survey was made to select the construction materials for the SDR-1 reactor core vessel and grid plates. Hastelloy C was selected for the reactor vessel, top grid plate, and bottom grid plate. Inconel X was selected for the core hold-down springs. (C.J.G.)
Date: April 11, 1960
Creator: Facha, J.V.
Partner: UNT Libraries Government Documents Department

MELTING AND FORMING OF SER FUEL RODS

Description: Sixty-one metal alloy reds were fabricated for the SNAP Experimental Reactor (SER), a compact nuclear power source. These rads were 1 in. in diameter by 10 in. long and consisted of an alloy containing 7 wt.% highly enriched uranium and 93 wt.% zinconium. Melting of the alloy was done by generally accepted consumable-arc meltiag techniques. Extrusion of alloy slugs into rods was carried out, unclad, at 850 deg F. Suitable controls were developed to insure uniformity of products and reproducibility of batches. The procedures developed for this application are considered adequate for future requirements. (auth)
Date: October 1, 1960
Creator: Drennan, P.S.
Partner: UNT Libraries Government Documents Department

THE SNAP-II POWER CONVERSION SYSTEM. DYNAMIC ANALYSIS. TOPICAL REPORT NO. 3

Description: SNAP II is the designation for a nuclear auxiliary power unit, designed primarily for utilization in the WS117L satellite vehicle. The SNAP II system consists of a reactor heat source, a mercury Rankin engin, and an alternator. Dynamic analysis of the power conversion system was conducted utilizing a comprehensive analog computer simulation. Feasibility of a parasitic load control for numerous system disturbances was demonstrated. (auth)
Date: January 15, 1960
Creator: Deibel, D.L.; Mrava, G.L. & Seldner, K.
Partner: UNT Libraries Government Documents Department

THE SNAP-II POWER CONVERSION SYSTEM. TOPICAL REPORT NO. 4. TURBINE DESIGN AND TESTING

Description: SNAP II is the designation for a 3 kw nuclear auxiliary power unit to be used in a satellite vehicle. The SNAP II system consist of a reactor heat source, a mercury Rankine engine, and an alternator. A two stage, full admission, axial flow turbine was chosen for this APU application. Design details and test results are presented. (auth).
Date: January 18, 1960
Creator: Poulos, E.N. & Furman, E.R.
Partner: UNT Libraries Government Documents Department

THE SNAP II POWER CONVERSION SYSTEM TOPICAL REPORT NO. 7. MERCURY MATERIALS EVALUATION AND SELECTION

Description: The SNAP II system consists of a reactor heat source, a mercury Rankine engine, and an alternator. The problems involved in selecting materials for the SNAP II mercury system were studied. A discussion is given of the corrosion mechanisms involved in a system in which mercury is the working fluid. The problem resolves itself into selecting materials with the best combination of engineering properties for the application and highest resistance to mercury corrosion at the anticipated temperature. (auth)
Date: October 26, 1960
Creator: Owens, J.J.; Nejedlik, J.F. & Vogt, J.W.
Partner: UNT Libraries Government Documents Department

THE SNAP II POWER CONVERSION SYSTEM. Topical Report No. 6, Bearing Design and Development

Description: A preliminary analysis conducted on various types of bearings indicated that hydrodynamic type journal and thrust bearings lubricated with a portion of the mercury from the condensate return pump would best suit the SNAP II requirements. Experimental rssults confirmed the bearing design approach. Stable bearing operation was obtained at speeds in excess of the 40,000 rpm design objective with simulated loads of 1 to 10 g in the radial direction, and 0 to 2 g in the axial direction. Total power consumption of the bearing system is approximately 550 watts at the design speed. (auth)
Date: June 22, 1960
Creator: Waldron, W.D.
Partner: UNT Libraries Government Documents Department

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

Description: Turbine development for the SNAP I power conversion system is described. A three-stage axial flow turbine with the first two impulse stages partial admission and the last stage full admission with a slight amount of reaction was selected. Other design and performance data are included. (J.R.D.)
Date: June 20, 1960
Creator: Reemsnyder, D.C. & Szanca, E.M.
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 MATERIALS DEVELOPMENT. Period covered: February 1, 1957 to June 30, 1959

Description: Investigations of materials for use in connection with the SNAP I mercury Rankine cycle power conversion system are discussed. Test programs are outlined and results are tabulated for each candidate material. Several nonmetallic materials and processing procedures were developed which enabled uncooled high-performance electric machinery to operate at 550 deg F in mercury vapor. (J.R.D.)
Date: June 20, 1960
Creator: Hambor, V.F. & Owens, J.J.
Partner: UNT Libraries Government Documents Department

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

Description: Development of the SNAP I power conversion system is described. The system is designed to convert the thermal energy produced by the decay of radioisotopes into 500 watts of electrical energy by means of a mercury Funkine cycle. A list of specific accomplishments of the program is included. (J.R.D.)
Date: June 20, 1960
Creator: Biering, R.C.; Carrell, D.D.; Grevstad, P.E.; Otto, N.P.; Picking, J.W.; Thur, G.M. et al.
Partner: UNT Libraries Government Documents Department

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

Description: Development of the control elements for the SNAP 1 power conversion system is described. A description of test and prototype hardware and performance data are included. The control package in its final design is a combination of regulator and speed-sensitive feedback which provides satisfactory steady-state operation and serves as a mechanism correction for system disturbances. (J.R.D.)
Date: June 20, 1960
Creator: Dauterman, W.E.; Mueller, M.W. & Viton, E.J.
Partner: UNT Libraries Government Documents Department

SNAP I POWER CONVERSION SYSTEM CONDENSER RADIATOR DEVELOPMENT. Period covered: February 1, 1957 to April 15, 1959

Description: S>Development of the condenser-radiator for use in the SNAP I power conversion system is described. Although no prototype hardware was designed or tested in the program, the concept of rejecting waste by radiation in a gravitationless environment was proved feasible. (J.R.D.)
Date: June 20, 1960
Creator: Kiraly, R.J. & Reemsnyder, D.C.
Partner: UNT Libraries Government Documents Department

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

Description: Development of bearings for use in the SNAP I power conversion system is described. Liquid mercury, lubricated hydrosphere bearings were selected. Design and performance data are given along with conclusions. (J.R.D.)
Date: June 20, 1960
Creator: Meredith, R.; Ono, G.Y. & Reemsnyder, D.C.
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

The Nuclear Rocket: New Powerplant for Space Vehicle Propulsion

Description: A fundamental and practical survey is made of nuclear rocket application to space vehicle propulsion. The engine is described and propellant and radiation effects are discussed. Project Rover is summarized and performance requirements for a space vehicle are discussed. It is concluded that nuclear rockets can provide substantial performance, reliability, and economic advantages for difficult space missions. (T.R.H.)
Date: March 1, 1960
Creator: Schmidt, H. R. & Decker, R. S.
Partner: UNT Libraries Government Documents Department

APPLICATION OF NUCLEAR POWER SUPPLIES TO SPACE SYSTEMS

Description: Studies were made to ascertain what useful satellite and/ or space missions may be accomplished with the SNAP 2, 8, and 10 power systems within the 1960 to 1970 time period, to delineate useful satellite and/or space missions which would most profitably employ nuclear power sources, to ascertain what restrictions are imposed on various payloads as a result of having a nuclear power system on board, and to investigate the general vehicle integration and installation requirements of the SNAP 2 and 10 power units. Space flight programs, characteristics and limitations of SNAP, applications of nuclear power supplies. design integration, and system integration are discussed. (M.C.G.)
Date: June 30, 1960
Partner: UNT Libraries Government Documents Department