High exposure control rod finger

Details High exposure control rod finger High exposure control rod finger

G - Physics

21

C

359/86

G21C 7/10 (2006.01)

Patent

CA 1105623

Abstract of the Disclosure A nuclear reactor control rod containing a stack of B4C 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 B4C. One such sleeve material is a type 347 stainless steel having 22.5% theoretical density. 7090

313067

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