Press plug About OKG Nuclear power Security Environment Work at OKG Press School INES scale Area protection Reactor safety Radiation Safety culture Security policy INES scale The INES (International Nuclear Event Scale) has been developed by the United Nations International Atomic Energy Agency (IAEA), where incidents at nuclear power plants can be classified according to severity. In this way, the public and the media can get a quick and understandable explanation of how serious an event is. Classification of events The safety significance is classified on a scale from 1-7. The INES scale is used internationally and is a complement to the reporting system used between the nuclear facilities and the authorities. INES 7 Chernobyl 1986. The accident at reactor 4 at the Chernobyl nuclear power plant in present-day Ukraine had far-reaching effects on the environment and human health. Fukushima 2011. En kraftig jordbävning med efterföljande tsunami orsakade reaktorhaverier i Japan, med radioaktiva utsläpp som konsekvens. INES 5 Windscale 1957. Olyckan vid en luftkyld grafitreaktor i nuvarande Sellafield i England orsakade radioaktiva utsläpp till atmosfären. Three Mile Island 1979. Olyckan vid kärnkraftverket i USA orsakade att reaktorhärden skadades allvarligt. Det radioaktiva utsläppet utanför anläggningen var mycket begränsat. INES 4 Saint Laurent 1980. Olyckan i kärnkraftverket i Frankrike medförde att en del av reaktorhärden skadades, inget yttre radioaktivt utsläpp förekom. Tokaimura 1999. Olyckan i den kombinerade upparbetnings-anläggningen och bränslefabriken Tokaimura i Japan ledde till begränsade yttre radioaktiva utsläpp. INES 3 Vandellos 1989. The incident at the Vandellos nuclear power plant in Spain did not cause any external emissions of radioactivity, nor did it cause any damage to the reactor core or contamination in the plant. INES 2 Forsmark 2006. A short circuit in a switchgear at Forsmark 1 caused a disturbance in the electricity supply. Only two out of four reserve power supplies started. No emissions occurred. The page was reviewed on March 27, 2018 Related info IAEA Government reporting Chernobyl Fukushima OKG Aktiebolag Simpevarp 200, 572 83 Oskarshamn info@okg.uniper.energy 0491-78 60 00 Org nr: 556063-3728 Contact Processing of personal data Press Current production at O3 Created with Raphaël 2.1.4 1433 1450 MW 0 1450 About our production Our production of electricity, with very low greenhouse gas emissions, is a national resource that creates jobs and contributes to prosperity and competitiveness for Swedish industry. We use cookies to make the website work in a good way for you. By continuing to browse, you agree that we use cookies. What are cookies? I understand