Fuel assembly and reactor core

Details Fuel assembly and reactor core Fuel assembly and reactor core

1992-12-23

1995-07-11

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376444, 376448, 376435, G21C 332

Patent

active

054328292

ABSTRACT:
A fuel assembly comprises fuel rods arrayed in a square lattice pattern of 10 rows and 10 columns, and three large-diameter water rods arranged along a diagonal line of the fuel assembly in such a region as able to accommodate 10 fuel rods. Partial length fuel rods are arranged in an outermost layer of the fuel rod array at fuel rod setting positions other than corners of the outermost layer. Ordinary fuel rods are arranged in a layer inside the outermost layer and adjacent to the outermost layer at positions adjacent to the partial length fuel rods in the outermost layer.
The struction of the fuel assembly enables a reduction in the void coefficient and an improvement in the reactivity control capability. Also, the void coefficient can be reduced without lowering reactivity, and fuel economy is improved.

REFERENCES:
patent: 4876062 (1989-10-01), Aoyama et al.
patent: 4926450 (1990-05-01), Masuhara et al.
patent: 4968479 (1990-11-01), Ogiya et al.
patent: 5009840 (1991-04-01), Ueda et al.
patent: 5068082 (1991-11-01), Ueda et al.
patent: 5202085 (1993-04-01), Aoyama et al.
patent: 5299244 (1994-03-01), Yamauchi et al.

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