TERMIUM Plus®

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MAJOR ACCIDENT [1 record]

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Record 1 2012-01-05

English

Subject field(s)
  • Nuclear Plant Safety
  • Nuclear Fission Reactors
CONT

The International Nuclear Event Scale [INES]. Level 7. Major accident. Criteria. External release of a large fraction of the radioactive material in a large facility (e.g. the core of a power reactor). This would typically involve a mixture of short and long-lived radioactive fission products (in quantities radiologically equivalent to more than tens of thousands of terabecquerels of iodine-131). Such a release would result in the possibility of acute health effects; delayed health effects over a wide area, possibly involving more than one country; long-term environmental consequences.

French

Domaine(s)
  • Sûreté des centrales nucléaires
  • Réacteurs nucléaires de fission
CONT

Structure fondamentale de l’échelle INES [échelle internationale des événements nucléaires]. [Niveau] 7. Accident majeur. Conséquences à l'extérieur du site. Rejets majeurs : effets étendus sur la santé et l’environnement.

OBS

Le seul accident de niveau 7 connu dans le monde est celui deTchernobyl en 1986.

Spanish

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