Nuclear and radiation accidents and incidents

Table columns:
Date
Location of accident
Description of accident or incident
Dead
Cost ($US millions 2006 )
INES level[25]

Table rows:
cells: 000000001957-09-29-0000September 29, 1957
Mayak, Kyshtym, Russia
The Kyshtym disaster was a radiation contamination incident that occurred at Mayak, a Nuclear fuel reprocessing plant in the Soviet Union.
6
cells: 000000001957-07-26-0000July 26, 1957
Simi Valley, California, United States
Partial core meltdown at Santa Susana Field Laboratory’s Sodium Reactor Experiment.
0
32
cells: 000000001957-10-10-0000October 10, 1957
Sellafield aka Windscale fire, Cumberland, United Kingdom
A fire at the British atomic bomb project destroyed the core and released an estimated 740 terabecquerels of iodine-131 into the environment. A rudimentary smoke filter constructed over the main outlet chimney successfully prevented a far worse radiation leak and ensured minimal damage.
0
5
cells: 000000001961-01-03-0000January 3, 1961
Idaho Falls, Idaho, United States
Explosion at SL-1 prototype at the National Reactor Testing Station. All 3 operators were killed when a control rod was removed too far.
3
22
4
cells: 000000001966-10-05-0000October 5, 1966
Frenchtown Charter Township, Michigan, United States
Partial core meltdown of the Fermi 1 Reactor at the Enrico Fermi Nuclear Generating Station. No radiation leakage into the environment.
0
132[26]
cells: 000000001969-01-21-0000January 21, 1969
Lucens reactor, Vaud, Switzerland
On January 21, 1969, it suffered a loss-of-coolant accident, leading to a partial core meltdown and massive radioactive contamination of the cavern, which was then sealed.
0
5
cells: 000000001975-01-01-00001975
Sosnovyi Bor, Leningrad Oblast, Russia
There was reportedly a partial nuclear meltdown in Leningrad nuclear power plant reactor unit 1.
cells: 000000001975-12-07-0000December 7, 1975
Greifswald, East Germany
Electrical error causes fire in the main trough that destroys control lines and five main coolant pumps
0
443
3
cells: 000000001976-01-05-0000January 5, 1976
Jaslovské Bohunice, Czechoslovakia
Malfunction during fuel replacement. Fuel rod ejected from reactor into the reactor hall by coolant (CO2).[27]
2
4
cells: 000000001977-02-22-0000February 22, 1977
Jaslovské Bohunice, Czechoslovakia
Severe corrosion of reactor and release of radioactivity into the plant area, necessitating total decommission
0
1,700
4
cells: 000000001979-03-28-0000March 28, 1979
Three Mile Island, Pennsylvania, United States
Loss of coolant and partial core meltdown due to operator errors. There is a small release of radioactive gases. See also Three Mile Island accident health effects.
0
2,400
5
cells: 000000001984-09-15-0000September 15, 1984
Athens, Alabama, United States
Safety violations, operator error, and design problems force a six-year outage at Browns Ferry Unit 2.
0
110
cells: 000000001985-03-09-0000March 9, 1985
Athens, Alabama, United States
Instrumentation systems malfunction during startup, which led to suspension of operations at all three Browns Ferry Units
0
1,830
cells: 000000001986-04-11-0000April 11, 1986
Plymouth, Massachusetts, United States
Recurring equipment problems force emergency shutdown of Boston Edison’s Pilgrim Nuclear Power Plant
0
1,001
cells: 000000001986-04-26-0000April 26, 1986
Chernobyl, Chernobyl Raion (Now Ivankiv Raion), Kiev Oblast, Ukraininan SSR, Soviet Union
Overheating, steam explosion, fire, and meltdown, necessitating the evacuation of 300,000 people from Chernobyl and dispersing radioactive material across Europe (see Effects of the Chernobyl disaster)
30 direct, 19 not entirely related and 15 minors due to thyroid cancer, as of 2008.[3][28]
6,700
7
cells: 000000001986-05-04-0000May 4, 1986
Hamm-Uentrop, West Germany
Experimental THTR-300 reactor releases small amounts of fission products (0.1 GBq Co-60, Cs-137, Pa-233) to surrounding area
0
267
cells: 000000001987-03-31-0000March 31, 1987
Delta, Pennsylvania, United States
Peach Bottom units 2 and 3 shutdown due to cooling malfunctions and unexplained equipment problems
0
400
cells: 000000001987-12-19-0000December 19, 1987
Lycoming, New York, United States
Malfunctions force Niagara Mohawk Power Corporation to shut down Nine Mile Point Unit 1
0
150
cells: 000000001989-03-17-0000March 17, 1989
Lusby, Maryland, United States
Inspections at Calvert Cliff Units 1 and 2 reveal cracks at pressurized heater sleeves, forcing extended shutdowns
0
120
cells: 000000001992-03-01-0000March 1992
Sosnovyi Bor, Leningrad Oblast, Russia
An accident at the Sosnovy Bor nuclear plant leaked radioactive gases and iodine into the air through a ruptured fuel channel.
cells: 000000001996-02-20-0000February 20, 1996
Waterford, Connecticut, United States
Leaking valve forces shutdown Millstone Nuclear Power Plant Units 1 and 2, multiple equipment failures found
0
254
cells: 000000001996-09-02-0000September 2, 1996
Crystal River, Florida, United States
Balance-of-plant equipment malfunction forces shutdown and extensive repairs at Crystal River Unit 3
0
384
cells: 000000001999-09-30-0000September 30, 1999
Ibaraki Prefecture, Japan
Tokaimura nuclear accident killed two workers, and exposed one more to radiation levels above permissible limits.
2
54
4
cells: 000000002002-02-16-0000February 16, 2002
Oak Harbor, Ohio, United States
Severe corrosion of control rod forces 24-month outage of Davis-Besse reactor
0
143
3
cells: 000000002004-08-09-0000August 9, 2004
Fukui Prefecture, Japan
Steam explosion at Mihama Nuclear Power Plant kills 4 workers and injures 7 more
4
9
1
cells: 000000002006-07-25-0000July 25, 2006
Forsmark, Sweden
An electrical fault at Forsmark Nuclear Power Plant caused one reactor to be shut down
0
100
2
cells: 000000002011-03-11-0000March 11, 2011
Fukushima, Japan
A tsunami flooded and damaged the plant's 5 active reactors, drowning two workers. Loss of backup electrical power led to overheating, meltdowns, and evacuations.[29] One man died suddenly while carrying equipment during the clean-up.[30] The plant's 6th reactor was inactive at the time.
2+
7
cells: 12 September 2011
Marcoule, France
One person was killed and four injured, one seriously, in a blast at the Marcoule Nuclear Site. The explosion took place in a furnace used to melt metallic waste.
1

Questions about this table:
originalText: where was the most serious global nuclear power plant accident in 1986
answer: answerTexts: Chernobyl, Chernobyl Raion (Now Ivankiv Raion), Kiev Oblast, Ukraininan SSR, Soviet Union