date	location	type of accident	deaths	injuries	highest dose (rem)	activity release	fissions (x1015)
11 Feb 1945	Los Alamos, New Mexico, USA	uranium in styrex	0	0	0		6
6 Jun 1945	Los Alamos, New Mexico, USA	uranium in water	0	0	66		40
21 Aug 1945	Los Alamos, New Mexico, USA	plutonium assembly	1	1	510		10
21 May 1946	Los Alamos, New Mexico, USA	plutonium assembly	1	4	2100		3
? Dec 1949	Los Alamos, New Mexico, USA	uranium in solution	0	0	2.5		35
~1950?	Chalk River, Ontario, Canada	uranium in water	0	0	>5?		?
1 Feb 1951	Los Alamos, New Mexico, USA	uranium in water	0	0	~0		100
16 Nov 1951	Hanford Works, Washington, USA	plutonium in solution	0	0	low		80
18 Apr 1952	Los Alamos, New Mexico, USA	uranium assembly	0	0	~0		15
2 Jun 1952	Argonne, Illinois, USA	uranium in water	0	2	140		122
12 Dec 1952	Chalk River, Ontario, Canada	uranium in water	0	0	low		120000
9 Apr 1953	Sarov, Russia, USSR	plutonium assembly	0	0	1.6		11
15 Mar 1953	Mayak Enterprise, Russia, USSR	plutonium in solution	1	1	1000		200
3 Feb 1954	Los Alamos, New Mexico, USA	uranium assembly	0	0	~0		56
26 May 1954	Oak Ridge, Tennessee, USA	uranium in solution	0	0	0.9		100
22 Jul 1954	Idaho RTA, Idaho, USA	uranium in water	0	0	~0		4680
29 Nov 1955	Argonne, Illinois, USA	uranium	0	0	~0		470
1 Feb 1956	Oak Ridge, Tennessee, USA	uranium in solution	0	0	0.6		160
3 Jul 1956	Los Alamos, New Mexico, USA	uranium	0	0	0		32
12 Feb 1957	Los Alamos, New Mexico, USA	uranium assembly	0	0	~0		120
21 Apr 1957	Mayak Enterprise, Russia, USSR	uranium in solution	1	5	3000		100
2 Jan 1958	Mayak Enterprise, Russia, USSR	uranium in solution	3	1	6000		230
16 Jun 1958	Oak Ridge, Tennessee, USA	uranium in solution	0	5	460		1300
15 Oct 1958	Vinca, Yugoslavia	uranium in water	1	5	430		2600
18 Nov 1958	Reactor Testing Area, Idaho, USA	uranium	0	0	~0		25000
30 Dec 1958	Los Alamos, New Mexico, USA	plutonium in solution	1	0	12000		150
16 Oct 1959	Idaho RTA, Idaho, USA	uranium in solution	0	0	50	some	40000
15 Mar 1960	Saclay, France	uranium in water	0	0	~0		3000
17 Jun 1960	Los Alamos, New Mexico, USA	uranium assembly	0	0	~0		60
5 Dec 1960	Mayak Enterprise, Russia, USSR	plutonium in solution	0	0	2		250
3 Jan 1961	Idaho RTA, Idaho, USA	uranium in water	3	0	fatal*		4400
25 Jan 1961	Idaho RTA, Idaho, USA	uranium in solution	0	0	<0.06		600
14 Jul 1961	Siberian Chemical Combine, Russia, USSR	uranium	0	1	200		12
10 Nov 1961	Oak Ridge, Tennessee, USA	uranium assembly	0	0	~0		10
7 Apr 1962	Hanford, Washington, USA	plutonium in solution	0	3	110		800
7 Sep 1962	Mayak Enterprise, Russia, USSR	plutonium in solution	0	0	low		200
5 Nov 1962	Idaho RTA, Idaho, USA	uranium in water	0	0	~0		1000
11 Dec 1962	Los Alamos, New Mexico, USA	uranium	0	0	~0		30
30 Jan 1963	Siberian Chemical Combine, Russia, USSR	uranium in solution	0	0	17		790
11 Mar 1963	Sarov, Russia, USSR	plutonium assembly	0	2	550		5
26 Mar 1963	Livermore, California, USA	uranium assembly	0	0	0.12		376
2 Dec 1963	Siberian Chemical Combine, Russia, USSR	uranium in solution	0	0	<5		60
24 Jul 1964	Wood River, Rhode Island, USA	uranium in solution	1	1	10000		130
28 May 1965	White Sands, New Mexico, USA	uranium assembly	0	0	~0		150
30 Dec 1965	Mol, Belgium	uranium in water	0	1	500		430
3 Nov 1965	Electrostal Plant, Russia, USSR	uranium oxide slurry	0	0	3		8
16 Dec 1965	Mayak Enterprise, Russia, USSR	uranium in solution	0	0	0.27		550
30 Jan 1968	Oak Ridge, Tennessee, USA	uranium in solution	0	0	low		11
5 Apr 1968	Chelyabinsk-70, Russia, USSR	uranium assembly	2	0	3000		60
6 Sep 1968	Aberdeen, Maryland, USA	uranium assembly	0	0	~0	0	609
10 Dec 1968	Mayak Enterprise, Russia, USSR	plutonium in solution	1	1	2450		130
24 Aug 1970	Windscale Works, England, United Kingdom	plutonium in solution	0	0	2		1
15 Feb 1971	Kurtchatov, Russia, USSR	uranium	0	2	?		20000
26 May 1971	Kurtchatov, Russia, USSR	uranium in water	2	2	6000		2000
17 Oct 1978	Idaho CPP, Idaho, USA	uranium in solution	0	0	low		2700
13 Dec 1978	Siberian Chemical Combine, Russia, USSR	plutonium assembly	0	1	250		3
23 Sep 1983	Constituyentes, Argentina	uranium in water	1	0	3700		400
10 Aug 1985	Chazhma Bay, Vladivostock, Russia, USSR	uranium reactor	10	49	220	~7 MCi	5000
15-16 May 1997	Novosibirsk Plant, Russia	uranium in solution	0	0	<0.4		5.5
17 Jun 1997	Arzamas-16, Russia	uranium assembly	1	0	4800		10000
30 Sep 1999	Toki-mura, Japan	uranium in solution	2	1	1800		2500

© 2002, 2007 by Wm. Robert Johnston.
Last modified 20 September 2007.
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