9 shows shield mass for reactor powers of 333 kWt and 2.5 MWt, and dose rates of 5 and 25 rem/30 days for a range of separation distances from 100 to 1000 m. Three concepts were included in the growth space station application study: (1) two 150 kWe boom-mounted reactor power systems; (2) one 300 kWe boom-mounted reactor power system; and (3) one 300 kWe tether-mounted reactor power system. The first of the boom-mounted concepts consisted of two 150 kWe reactor-based power systems, each mounted 165 m from the centerline of the station. The second of the boom-mounted concepts used one 300 kWe reactor-based power system, 60 m from the bottom boom of the space station. Two types of shielding were considered for
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