Coupling structure of fuel assembly

G - Physics – 21 – C

Patent

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Details

G21C 3/33 (2006.01)

Patent

CA 2687678

The coupling structure of a fuel assembly, which eliminates a play in the vertical direction at the fitting portion of a latch sleeve (10) and a lock key (20) while preventing foreign matters from mixing with fuel, comprises the latch sleeve (10) having a projecting portion (11) formed at the upper end portion thereof, an upper nozzle (30) having a latch sleeve installation hole (31) into which the upper end portion of the latch sleeve (10) is inserted, and the lock key (20) installed in the latch sleeve installation hole (31) and provided, in the lower surface thereof, with an opening (21) having a shape matching the shape of the projecting portion (11), the latch sleeve (10) and the lock key (20) being coupled together by turning the lock key (20) after inserting the upper end portion of the latch sleeve (10) into the lock key (20), wherein a screw coupling means for screw coupling the lock key (20) to the upper nozzle (30) side by forming a male screw (23) on the side surface of the lock key (20)is provided.

La structure de couplage d'un assemblage combustible, qui élimine un jeu dans la direction verticale au niveau de la partie de raccord d'une douille (10) et d'une clé de verrouillage (20) tout en empêchant les corps étrangers de se mélanger avec le combustible, comprend la douille (10) qui possède une partie en saillie (11) formée en son extrémité supérieure, une buse supérieure (30) qui possède un orifice d'installation de douille (31) dans lequel est insérée l'extrémité supérieure de la douille (10), et la clé de verrouillage (20) installée dans l'orifice d'installation de la douille (31) et munie, sur sa surface inférieure, d'une ouverture (21) qui possède une forme qui correspond à la forme de la partie en saillie (11), la douille (10) et la clé de verrouillage (20) étant accouplées en tournant la clé de verrouillage (20) après avoir inséré l'extrémité supérieure de la douille (10) dans la clé de verrouillage (20), des moyens d'accouplement à vis destinés à accoupler la clé de verrouillage (20) du côté de la buse supérieure (30) en formant une vis mâle (23) sur la surface latérale de la clé de verrouillage (20)étant prévus.

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