Fuel assembly of a boiling water reactor with supplementary feed

Details Fuel assembly of a boiling water reactor with supplementary feed Fuel assembly of a boiling water reactor with supplementary feed

1992-04-02

1993-09-07

Wasil, Daniel D.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

G21C 3322

Patent

active

052436365

ABSTRACT:
A fuel assembly for a boiling water reactor includes an elongated case having a bottom, a top and an interior. A base part covers the bottom of the case and has inlet openings formed therein for a liquid coolant acting as a moderator. A head part covers the top of the case and has outlet openings formed therein for a liquid/steam mixture of the coolant. At least one throttle restriction is disposed in a cross-sectional plane between the head part and the base part. A portion of the coolant flows along and between a bundle of fuel rods which are disposed parallel to one another and to the case in the interior of the case. A portion of the liquid coolant is guided through the at least one tube. The at least one tube is disposed parallel to the rods in the bundle between the base part and the head part. The at least one tube has lateral outlet openings formed therein upstream of the cross-sectional plane of the throttle restriction. The at least one tube has a lower end with a liquid inlet formed therein, and the liquid inlet is expanded to render a pressure loss in the coolant flow between the inlet openings in the base part and the cross-sectional plane in the interior of the tube negligibly small as compared with a pressure loss outside the tube.

REFERENCES:
patent: 3629065 (1971-12-01), Knox
patent: 4708846 (1987-11-01), Patterson et al.
patent: 4968479 (1990-11-01), Ogiya et al.

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