High exposure control rod finger

Details High exposure control rod finger High exposure control rod finger

1978-01-20

1979-10-30

Behrend, Harvey E.

G21C 710

Patent

active

041727622

ABSTRACT:
A nuclear reactor control rod containing a stack of B.sub.4 C absorber pellets in which the pellets in the lower end have a radius smaller than that of the other pellets and are wrapped with a sleeve having a linear compressibility sufficient to accommodate exposure-induced radial expansion of the end pellets without producing excessive clad strain and having a thermal conductivity sufficient to keep the centerline temperature of the end pellets below the melting point of B.sub.4 C. One such sleeve material is a type 347 stainless steel having 22.5% theoretical density.

REFERENCES:
patent: 3030294 (1962-04-01), Beaver
patent: 3365368 (1968-01-01), Fray
patent: 3407117 (1968-10-01), Lichtenberger
patent: 3507748 (1970-04-01), Fenech et al.
patent: 3510398 (1970-05-01), Wood

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