Fuel assembly

Details Fuel assembly Fuel assembly

1991-10-07

1994-03-29

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376434, 376441, G21C 334

Patent

active

052992446

ABSTRACT:
A plurality of fuel rods containing fissile material are arranged in triangle lattices. A plurality of water rods groups are arranged among the fuel rods. Each of the water rods groups includes no fuel rod but a plurality of water rods which are arranged adjacently each other in triangle lattices having substantially same pitch as the fuel rods. The water rods groups are arranged not adjacently each other, and are surrounded with the fuel rods. the outer diameter of the water rod is smaller than the pitch. The fuel assembly is able to suppress increment of pressure loss because of formation of coolant path among adjacent water rods. Further, void reactivity coefficient is able to be small.

REFERENCES:
patent: 4588550 (1986-05-01), Blomstrand et al.
patent: 4777016 (1988-10-01), Yoshioka et al.
patent: 4789520 (1988-12-01), Morimoto et al.
patent: 4863680 (1989-09-01), Sakurada et al.
patent: 5068082 (1991-11-01), Ueda et al.

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