Nuclear reactor fuel with radially varying enrichment

Details Nuclear reactor fuel with radially varying enrichment Nuclear reactor fuel with radially varying enrichment

1988-09-30

1990-01-02

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376435, G21C 316, G21C 332

Patent

active

H00007226

ABSTRACT:
The fuel pellets inside the fuel rods of a boiling water reactor are made with a lower enrichment concentration in the axial radial region and a higher concentration near the peripheral radial region to reduce thermal expansion effects upon sudden rises in temperature of the pellet when the reactor power is abruptly increased by a rapid step-wise withdrawal of a control rod. At least rods immediately adjacent the control rods contain pellets of this type, but additional rods may also be of this construction.

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