Beam pipe with safety function for accelerator-driven...

G - Physics – 21 – C

Patent

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G21C 1/30 (2006.01) G21C 9/02 (2006.01)

Patent

CA 2337856

A beam pipe (46) for guiding in an accelerator-driven nuclear system an accelerated particle beam (44) through a coolant in a primary vessel (12) onto a spallation target (30) comprises, preferably near its tip end (48), a temperature triggered flooding device, including for example a melt-rupture disc. In case of an abnormal temperature increase in the system, the temperature triggered flooding device establishes, below the normal coolant level (16), a flooding communication between the vessel (12) and the interior of the beam pipe (46), thereby flooding the interior of the beam pipe (46) with the coolant (14) contained in the vessel (12).

L'invention concerne un tuyau (46) de faisceau servant à guider, dans un système nucléaire entraîné par un accélérateur, un faisceau (44) de particules accélérées à travers un fluide de refroidissement dans une cuve (12) primaire sur une cible (30) de spallation. Le tuyau comporte, de préférence à proximité de son extrémité (48) de pointe, un dispositif de noyage sensible à la température, comprenant par exemple un disque de rupture par fusion. Au cas où une augmentation anormale de la température se produit, le dispositif de noyage sensible à la température établit, au-dessous du niveau (16) normal de fluide de refroidissement, une communication de noyage entre la cuve (12) et l'intérieur du tuyau (46) de faisceau, ce qui permet de noyer l'intérieur du tuyau (46) de faisceau à l'aide du fluide (14) de refroidissement contenu dans la cuve (12).

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