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THERMOSYPHONING [1 record]

Record 1 - external organization data 2005-12-19

English

Subject field(s)
  • Nuclear Fission Reactors
  • Compartment - Canadian Nuclear Safety Commission
CONT

Natural convection, also called thermosyphoning, does not produce high flow. It cannot remove full power heat, but is adequate to remove decay heat. Natural convection occurs when cool D2O in the boiler tubes falls by gravity into the core. It displaces the hot, less dense D2O surrounding the fuel. The boilers cool the fluid pushed into them from the fuel channels, and it becomes more dense. The liquid that falls into the core expands on heating and becomes less dense. Thermosyphoning continues as long as the boilers continue to remove heat.

French

Domaine(s)
  • Réacteurs nucléaires de fission
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

La convexion naturelle, appelée également thermosiphonage, ne produit pas de débit élevé. Elle ne permet pas d'évacuer la chaleur à pleine puissance, mais convient pour évacuer la chaleur de désintégration. La convexion naturelle se produit lorsque le D2O froid dans les tubes des générateurs de vapeur tombe par gravité dans le coeur. Il déplace le D2O chaud et moins dense qui entoure le combustible. Les générateurs de vapeur refroidissent le fluide en provenance des canaux de combustible, et celui-ci devient plus dense. Le liquide qui tombe dans le coeur se dilate lors du chauffage et devient moins dense. Le thermosiphonage continue tant que les générateurs de vapeur évacuent la chaleur.

Spanish

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