A system for passively dissipating heat from the interior of...

G - Physics – 21 – C

Patent

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G21C 15/18 (2006.01)

Patent

CA 2183159

A system (10) for dissipating heat from the interior space (50) of a containment struc- ture (3, 6) for a nuclear reactor (2), for an indefinite time period, comprises a first heat exchanger (15, 15') outside said containment structure (3, 6) which is submerged vertically in a pool (11) associated with the exterior of the top wall (4, 7) of the structure (3, 6), and a sec- ond heat exchanger (25) placed in the interior space (50), said first and second heat exchang- ers (15, 25) being fluid connected to each other in a closed loop circuit (28) with piping (23, 24) containing a thermal carrier fluid. Said pool (11) is provided with a covering (90) defining a first duct (12) in communication with an outside air intake, and a second duct (13) in communi- cation with a chimney (14), the interconnection of said ducts (12, 13) being inhibited by the water present in the pool (11) when filled to a predetermined level (9).

L'invention porte sur un système (10) de dissipation de chaleur de l'intérieur (50) d'une structure de confinement (3, 6) d'un réacteur nucléaire (2), sur une durée indéfinie, ce système comprenant un premier échangeur thermique (15, 15') situé à l'extérieur de la structure de confinement (3, 6) et qui est immergé dans une piscine (11) associée à la partie extérieure de la paroi supérieure (4, 7) de la structure (3, 6), et un second échangeur thermique (25) placé dans l'espace interne (50) de la structure, ces premier et second échangeurs thermiques (15, 25) étant raccordés l'un à l'autre par un fluide dans un circuit à boucle fermée (28) par des conduites (23, 24) contenant un fluide entraîneur thermique. Cette piscine (11) est pourvue d'un toit (90) formant un premier conduit (12) communiquant avec une prise d'air externe, et un second conduit (13) communiquant avec une cheminée (14), l'interconnexion de ces conduits (12, 13) étant empêchée par l'eau présente dans la piscine (11) lorsque celle-ci est remplie jusqu'à un niveau prédéterminé (9).

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