Induced nuclear reactions: processes – systems – and elements – Reactor structures – With particular control rod guide structure
Patent
1990-02-26
1993-08-17
Hunt, Brooks H.
Induced nuclear reactions: processes, systems, and elements
Reactor structures
With particular control rod guide structure
376210, 376352, 376243, G21C 104
Patent
active
052375951
ABSTRACT:
An improved guide plate of the type used in the guide tubes of a nuclear reactor and having a central orifice for conducting coolant, and circular guide holes interconnected by slots for guidingly conducting the movement of control rodlets and control rod vanes through the guide tube is disclosed. The improvement comprises a plurality of vent openings in the form of vent holes uniformly disposed between the slots of the plate and vent gaps disposed between the outer periphery of the guide plate and the inner wall of the guide tube for reducing turbulence in the flow of coolant through the central orifice, thereby advantageously reducing both fretting and frictional engagement between the control rodlets and the guide holes. The resulting turbulence reduction further advantageously reduces the rodlet drop time through the guide tube, thereby enhancing reactor safety. Additionally, the guide holes of the improved guide plate are chrome plated to further reduce frictional engagement between the control rodlets and the plate.
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Chelliah Meena
Hunt Brooks H.
Westinghouse Electric Corp.
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