Fuel assembly

Details Fuel assembly Fuel assembly

1988-03-24

1989-10-24

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376443, 376447, G21C 332

Patent

active

048760625

ABSTRACT:
A fuel assembly of the present invention comprises a plurality of fuel rods which are held by an upper tie plate and lower tie plate at the ends thereof and a moderating rod which is arranged between the fuel rods and held by the lower tie plate at its lower end. The fuel rods are arranged in a lattice form having 9 rows and 9 columns, and the moderating rod contains a passage for a coolant and has a cruciate cross-sectional form. The ratio A.sub.M /A.sub.C of the area A.sub.M of a moderator region in the moderating rod in the cross-sectional plane in which the moderator is present to the area A.sub.C of the coolant passages in said fuel assembly is within the range of 0.07 to 0.11, and the area A.sub.M is 75% or more of the total area of the fuel lattice units in which none of the fuel rods is arranged, but the moderating rod is arranged.

REFERENCES:
patent: 4587089 (1986-05-01), Takeda
patent: 4597937 (1986-07-01), Sakurai
patent: 4652426 (1987-03-01), Boyle
patent: 4683113 (1987-07-01), Mochida
patent: 4686079 (1987-08-01), Ishikawa
patent: 4755348 (1988-07-01), Shiralkar
patent: 4759912 (1988-07-01), Talejarkhan
patent: 4762669 (1988-08-01), Doshi
patent: 4777016 (1988-10-01), Yoshioka
patent: 4789520 (1988-12-01), Morimoto

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