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ATOMS FOR SPACE AND SNAP 67 leave on the moon and planets will receive electricity from nuclear power generators. FIRST REACTOR IN SPACE: SNAP-10A (1966). 14V 2 minutes, color. Produced for the USAEC by Atomics International. For sale by Hollywood Film Enterprises, Inc., 6060 Sunset Blvd., Hollywood, Calif. 90028, at $40.40 per print, including shipping case, F.O.B. Hollywood. Also available for loan from the Library, Atomics International, P. O. Box 309, Canoga Park, Calif. 91304. Development, launch and results of the world's first nuclear reactor power system to operate in space are described in this semi-technical film, which will be of interest to a wide range of audiences, including high schools. The SNAP-10A unit, consisting of a nuclear reactor and power conversion unit, was thrust into a 700 nautical mile, nearly cir- cular orbit in April 1965 from Vandenberg Air Force Base. Following remote start-up, the power plant was operated successfully for 43 days and produced more than 500,000 watt-hours of electricity. SNAP-10A, a compact reactor, is coupled to a thermoelectric con- verter-radiator unit which converts heat from fission in the reactor directly into electricity. The heat is transferred to the power conver- sion unit by a liquid metal coolant, an alloy of sodium and potassium. The SNAP-10A system generates approximately 500 electrical watts. The motion picture also describes safety of the SNAP reactor during fabrication, testing, transport, installation, launch and use in space, as well as data obtained from the flight. Detailed sequences filmed at Atomics International on fabrication and testing show the simplicity and compactness of the reactor. See also "SNAPSHOT," a film which describes pre-flight prepara- tions, development, testing and qualification system tests in greater detail. SNAP-8: SYSTEM FOR NUCLEAR AUXILIARY POWER (1966). 10 minutes, color. Produced by the Aerojet-General Corporation. Queries on sale of prints should be directed to Aerojet General Corporation, Von Karman Center, Azusa, California. In order to travel in space, man must take his own environment with him. This requires power to supply oxygen, drinking water, air condi- tioning, lighting and to operate communication systems; in short: power to maintain equipment and sustain life itself. Simulating the earth's environment is by no means a new idea. Crews of nuclear submarines live in health and comfort for months at a time while submerged in a hostile environment. This is possible because nuclear energy provides a source of continuous, uninterrupted power. Space voyagers too, need this same kind of power, and this is where SNAP-8 comes in—using a mercury-vapor turbo-generator system to convert heat from a nuclear reactor into useful electricity.