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AUGMENTATION TRANSITOIRE REACTIVITE [1 record]

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Record 1 2017-04-13

English

Subject field(s)
  • Nuclear Physics
  • Nuclear Fission Reactors
CONT

After the Chernobyl accident, the shutdown system of all RBMK reactors was improved by: modifying the control rod design to eliminate the positive scram effect, reducing the rods' insertion time, incorporating the short bottom rods to the shutdown system, and implementing 24 fast-acting scram rods.

French

Domaine(s)
  • Physique nucléaire
  • Réacteurs nucléaires de fission
CONT

De fait, il n'est pas clair qu'un déclenchement de l'arrêt d'urgence à ce moment aurait évité un accident : la déformation du flux neutronique axial et la position des grappes de contrôle (presque toutes entièrement hors cœur) auraient pu conduire à une augmentation transitoire de la réactivité («positive scram»), déclenchant un accident 36 s plus tôt.

Spanish

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