Westinghouse Electric Corporation

Howard F Fensterer

Robert B Salton

Luciano Veronesi

John F Wilson

Donald G Sherwood

David E Boyle

William E Klassen

The mechanical spectral shift reactor comprises apparatus for inserting and withdrawing water displacer elements from the reactor core for selectively changing the water-moderator volume in the core thereby changing the reactivity of the core. The apparatus may include drive mechanisms for moving the displacer elements relative to the core and guide mechanisms for guiding the displacer rods through the reactor vessel. An array of tubes may be disposed between the guide mechanisms and the fuel assemblies for guidance and minimization of flow induced vibrations of the displacer elements.

Mechanical spectral shift reactor

Apparatus is disclosed for introducing a low neutron moderating fluid into the reactor vessel of a spectral shift pressurized water nuclear reactor and for distributing the moderating fluid through the lower core support plate into the fuel assemblies in the core.

Fluid moderator control system reactor internals distribution system

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Plum, PA, United States of America

Howard F Fensterer