Advanced Nuclear Fuels Corporation

Gerald L Ritter

An advanced boiling water reactor (BWR) fuel design is described that preferentially directs more unvoided water coolant into the upper portion of the fuel assembly. This allows relatively more fuel to be placed in the lower portion of the fuel assembly. This arrangement allows a more nearly optimun moderation of neutrons in the upper portion of the assembly while preserving a higher volume of fuel in the lower portion. In addition to providing a more nearly optimum distribution of water in the assembly, the larger number of fuel rods can be used in the lower portion to reduce the linear heat generation rate (power peaking) in the assembly.

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Richland, WA, United States of America

Gerald L Ritter