Advanced boiling water reactor fuel assembly design

Details Advanced boiling water reactor fuel assembly design Advanced boiling water reactor fuel assembly design

1989-02-17

1990-09-18

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376435, G21C 332

Patent

active

049576984

ABSTRACT:
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.

REFERENCES:
patent: 4675154 (1987-06-01), Nelson et al.
patent: 4708846 (1987-11-01), Patterson
patent: 4749547 (1988-06-01), Blomstrand
patent: 4777016 (1988-10-01), Yoshioka
patent: 4781885 (1988-11-01), Lill
Copy of `L` Supplied by Applicant w/translation.

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