Spectral shift reactor

Details Spectral shift reactor Spectral shift reactor

G - Physics

21

C

359/33

G21C 7/08 (2006.01) B23K 26/14 (2006.01) G21C 7/117 (2006.01) G21C 7/27 (2006.01)

Patent

CA 1175161

49,297 ABSTRACT OF THE DISCLOSURE A mechanical spectral shift reactor comprises apparatus for inserting and withdrawing water displacer elements having differing neutron absorbing capabilities for selectively changing the water-moderator volume in the core thereby changing the reactivity of the core. The displacer elements may comprise substantially hollow cylindrical low neutron absorbing rods and substantially hollow cylindrical thick walled stainless rods. Since the stainless steel displacer rods have greater neutron ab- sorbing capability, they can effect greater reactivity change per rod. However, by arranging fewer stainless steel displacer rods in a cluster, the reactivity worth of the stainless steel displacer rod cluster can be less than a low neutron absorbing displacer rod cluster.

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