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2.2.3. Nuclear reactors

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The largest use of nuclear energy is in the production of electricity. This is the area with the highest number of accidents. Table 2.1 lists accidents classified as severe on the INES with a rating of 3 or more. Subsequently, the three most serious civil accidents (Three Mile Island, Chernobyl and Fukushima Daiichi) will be detailed.

Table 2.1. The most significant accidents that have occurred in civil nuclear installations. G: severity on the INES

G Date Site, country Type of installation (number of years) Type of accident
3 06/01/1981 La Hague, France Reprocessing plant (15 years) Fire in a storage silo
16/08/1989 Gravelines, France PWR reactor (9 years) Inadequate screw in the primary circuit’s valve
19/10/1989 Vandellos, Spain Gas-graphite reactor (17 years) Fire of a turbo alternator unit
11/03/1997 Tokai-Mura, Japan Fuel production plant (18 years) Fire and explosion irradiating 37 people
10/04/2003 Paks, Hungary PWR reactor (19 years) Radioactive leakage in the fuel rod cleaning system
21/04/2005 THORP/Sellafield, United Kingdom Reprocessing plant (8 years) Leakage of radioactive liquid following a ruptured pipe
4 21/01/1969 Lucens, Switzerland Heavy water reactor (1 year) Cooling failure resulting in partial fusion of the reactor
17/10/1969 Saint-Laurent-des-Eaux, France Gas-graphite reactor (1 year) Uranium smelting Reactor shutdown for 1 year
26/09/1973 Windscale/Sellafield, United Kingdom Reprocessing plant (22 years) Explosion and release of radioactive materials (37 people irradiated)
07/12/1975 Lubmin, Germany PWR reactor (1 year) Short circuit on the reactor transformer, fire and destruction of cooling pump supply
22/02/1977 Bohunice, Slovakia Gas-cooled heavy water reactor (5 years) Core corrosion and power failure during fuel changeover
13/03/1980 Saint-Laurent-des-Eaux, France Gas-graphite reactor (9 years) Uranium melting and damaged core (corrosion)
30/09/1999 Tokai-Mura, Japan Fuel fabrication plant (22 years) Uranium dosing error and explosion (three irradiated, two deaths)
5 10/10/1957 Windscale Military reactor (11 years) Fire
28/03/1979 Three Mile Island, United States PWR reactor (1 year) Partial fusion of the reactor core
6 1957 Kyshtym, USSR Reprocessing plant (?) Explosion (>10 PBq 131I)
7 26/04/1986 Chernobyl, USSR (Ukraine) Pressure tube reactor (3 years) Explosion and partial melting of the core
11/03/2011 Fukushima-Daiichi, Japan BWR reactors (36–40 years old) Cooling shutdown and partial core melting of three reactors
Industrial and Medical Nuclear Accidents

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