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An emergency transfer tube closure for a nuclear reactor well comprising an elongated, vertically-extending, U-shaped guide laterally disposed on each side of the transfer tube, a closure plate vertically disposed between the guides having rollers thereon riding within the guides permitting movement

An emergency transfer tube closure for a nuclear reactor well comprising an elongated, vertically-extending, U-shaped guide laterally disposed on each side of the transfer tube, a closure plate vertically disposed between the guides having rollers thereon riding within the guides permitting movement of the closure plate downwardly into sealing engagement with the transfer tube under emergency conditions.

대표청구항 ▼

In a nuclear fuel reactor well that includes a transfer tube projecting outwardly from wall thereof, said transfer tube having a first closure assembly, and said transfer tube having a circumferential flange extending outwardly laterally therefrom, an emergency transfer tube closure therefor compris

In a nuclear fuel reactor well that includes a transfer tube projecting outwardly from wall thereof, said transfer tube having a first closure assembly, and said transfer tube having a circumferential flange extending outwardly laterally therefrom, an emergency transfer tube closure therefor comprising; a pair of elongated, vertically-extending U-shaped guides, one U-shaped guide disposed laterally on each side of said transfer tube, each of said U-shaped guides comprising a base and laterally-extending flanges thereon, said U-shaped guides having their open ends facing each other, a closure plate, having a surface facing said circumferential flange greater in area than the area circumscribed by the outer circumference of said circumferential flange, vertically disposed between said U-shaped guides, said closure plate normally being disposed in a vertical plane just slightly in front of the vertical plane of said circumferential flange, two pairs of rollers, one pair of which is rotatably mounted on each side of said closure plate adjacent said U-shaped guides, riding on the inner portion of each of said flanges of each of said U-shaped guides, each of said U-shaped guides being provided with a pair of spatially disposed openings on a flange thereof adjacent said wall of said nuclear fuel reactor well, each of said pairs of openings being disposed on each of said U-shaped guides a distance equal to the distance between the center lines of the corresponding pair of rollers riding within said U-shaped guides, each of said openings being sufficiently large to receive a corresponding roller of said pairs of rollers in said U-shaped guides, said openings being shaped on said flanges of said U-shaped guides so that when said pairs of rollers are disposed therein, the face of said closure plate will be in sealing engagement with said circumferential flange of said transfer tube.