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- W2296911688 abstract "A discussion is given of parameters affecting the size of small, fast nuclear reactors. The electric power in relation to reactor size for a helium Brayton cycle is compared with that for a potassium Rankine cycle. In a flat power-density distribution in a cylindrical reactor core, the potassium-cooled reactor is slightly larger than the helium-ccoled reactor for any given coolant volume fraction. The power that a reactor may deliver for a given size depends strongly upon the radius of the holes through which the coolant passes. For small hole radii (0.1 centimeters) in the potassium-cooled reactor, thermal stress limits the power the reactor may deliver. But although thermal stress generally limits the power of the helium-cooled reactor, a portion of its power range may be limited by maximum permissible wall temperatures of the coolant passage. For larger hole radii (0.3 centimeters), thermal stress still limits the potassium-cooled reactor; but wall temperature limits the helium-cooled reactor. Taking into account thermodynamic efficiency, the potassium-cooled reactor can deliver more power for a given reactor size if the coolant passage holes are large. However as the coolant passage holes are made smaller, the helium-cooled reactor improves faster than the potassium-cooled reactor. For ccolant holesmore » of 0.1 centimeter radius, the helium reactor can deliver more power for a given size than the potassium reactor. In any case, thermal stress and wall temperature are the only limiting factors in the electric power range from 0 to 10 megawatts. Therefore, the most desirable condition is to have the coolant passage holes as small as practical. (auth)« less" @default.
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- W2296911688 date "1960-09-01" @default.
- W2296911688 modified "2023-09-27" @default.
- W2296911688 title "COMPARISON OF NUCLEAR REACTOR PARAMETERS FOR USE WITH THE HELIUM BRAYTON CYCLE AND WITH THE POTASSIUM RANKINE CYCLE" @default.
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