[en] System requirements for cooling the shield within the vacuum vessel for the core test reactor are analyzed. The total heat to be removed by the coolant system is less than 22,700 Btu/hr, with an additional 4600 Btu/hr to be removed by the 2-inch thick steel plate below the shield. The maximum temperature of the concrete in the shield can be kept below 200⁰F if the shield plug walls are kept below 160⁰F. The walls of the two ''donut'' shaped shield segments, which are cooled by the water from the shield and vessel cooling system, should operate below 95⁰F. The walls of the center plug, which are cooled with nitrogen, should operate below 100⁰F. (U.S.)

No abstract available

No abstract available

[en] Nuclear reactor systems are one method of satisfying space mission power needs. The development of such systems must proceed on a path consistent with mission needs and schedules. This path, or technology roadmap, starts from the power system technology data base available today. Much of this data base was established during the 1960s and early 1970s, when government and industry developed space nuclear reactor systems for steady-state power and propulsion. One of the largest development programs was the Systems for Nuclear Auxiliary Power (SNAP) Program. By the early 1970s, a technology base had evolved from this program at the system, subsystem, and component levels. There are many implications of this technology base on future reactor power systems. A review of this base highlights the need for performing a power system technology and mission overview study. Such a study is currently being performed by Rockwell's Energy Systems Group for the Department of Energy and will assess power system capabilities versus mission needs, considering development, schedule, and cost implications. The end product of the study will be a technology roadmap to guide reactor power system development

[en] The nuclear analysis of the 5-kW(e) reactor shield is presented. Calculation methods and optimization techniques used are presented. Borated stainless steel was selected for the gamma ray shield with tungsten alloy as an alternate. The total shield weight was calculated to be 355 lb. (U.S.)

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No abstract available

[en] The majority of today's satellites are run off solar cells and batteries and need only 1 or 2 kW. By contrast, laser weapons could require 100 mW. The radar and advanced communications satellites would need a more modest 100 kW or so, but even that is far more than existing space power systems can deliver. Until a new source of power can be devised, all of this exotic space hardware will be so many flashlights without batteries. Discussed is the possibility of nuclear reactors for power in space. The crux of the problem is heat: how materials withstand it, how to discharge the excess. The military does not seem particularly interested now, but technological optimists predict space reactors can be ready when the missile defense and antisatellite weapons are, in the 21st century

No abstract available

[en] Preliminary design work resulting in the calculation of a pump based on the helical induction principle is reported. Report contains expected performance curves, size, etc. (U.S.)