Shortened and boat-tailed end for BWR fuel assembly water channe

Details Shortened and boat-tailed end for BWR fuel assembly water channe Shortened and boat-tailed end for BWR fuel assembly water channe

1992-03-26

1993-09-21

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

G21C 3322

Patent

active

052475522

ABSTRACT:
A nuclear fuel assembly for a light water reactor includes an axially directed shortened water channel, truncated between an uppermost spacer and an upper tie plate. A boat-tail shaped end fitting is mated to the truncated end of the water channel, with their mated outer surfaces forming a smooth tangential substantially continuous surface therebetween. Opposing outer side surfaces of the end fitting are substantially convex, and inwardly tapering toward one another in a continuously curved manner, with the side surfaces terminating to form a top aperture. The aperture provides for the exit of coolant moderator from the water channel, and is sized to equalize the internal flow velocity of coolant moderator exiting from said aperture to the external coolant moderator flow velocity at said aperture.

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