UK radioactive waste baseline inventory

1 January 2000

Level Description People and environment Radiological barriers Defence-in-depth
7 Major accident Chernobyl, Ukraine, 1986 — Widespread health and environmental effects. External release of a significant fraction of reactor core inventory.
6 Serious accident Kyshtym, Russia, 1957 — Significant release of radioactive material to the environment from explosion of a high activity waste tank.
5 Accident with wider consequences Windscale Pile, UK, 1957 — Release of radioactive material to the environment following a fire in a reactor core. Three Mile island, USA, 1979 — Severe damage to the reactor core.
4 Accident with local consequences Tokaimura, Japan, 1999 — Fatal overexposures of workers following a criticality event at a nuclear facility. Saint Laurent des Eaux, France, 1980 — Melting of one channel of fuel in the reactor with no release outside the site.
3 Serious incident Sellafield, UK, 2005 — Release of large quantity of radioactive material, contained within the installation. Vandellos, Spain, 1989 — Near accident caused by fire resulting in loss of safety systems at the nuclear power station.
2 Incident Atucha, Argentina, 2005 — Overexposure of a worker at a power reactor exceeding the annual limit. Cadarache, France, 1993 — Spread of contamination to an area not expected by design. Forsmark, Sweden, 2006 — Degraded safety functions for common cause failure in the emergency power supply system at nuclear power plant.
1 Anomaly Breach of operating limits of a nuclear facility
0 No safety significance



Privacy Policy
We have updated our privacy policy. In the latest update it explains what cookies are and how we use them on our site. To learn more about cookies and their benefits, please view our privacy policy. Please be aware that parts of this site will not function correctly if you disable cookies. By continuing to use this site, you consent to our use of cookies in accordance with our privacy policy unless you have disabled them.