Secret nuclear disaster in 1957: The cooling system in one of the tanks containing about 70–80 tons of liquid radioactive waste failed and was not repaired. The temperature in it started to rise, resulting in evaporation and a chemical explosion of the dried waste, consisting mainly of ammonium nitrate and acetates. The explosion, estimated to have a force of about 70–100 tons of TNT...  released an estimated 2 to 50 MCi (74 to 1850 PBq) of radioactivity.The radioactive cloud moved towards the northeast, reaching 300–350 kilometers from the accident. The fallout of the cloud resulted in a long-term contamination of an area of more than 800 square kilometers, primarily with caesium-137 and strontium-90. This area is usually referred to as the East-Ural Radioactive Trace (EURT). 

official site of the Chernobyl Disaster Zone

Fire in the UK's first (air-cooled) reactor: "[The] extreme heat generated of the fire stripped the oxygen from the [liquid carbon dioxide put on as an extinguisher] & [CO was] added to the blaze" ... "Plans [are underway] to remove the fire-damaged core,

Newly updated with 1999 data! Now with 68 countries

"the possible detection of a nuclear weapon test by an American Vela satellite on September 22, 1979."

peace is our profession

thx 18brumaire!

server backed up now

projections onto nuke plant

oak ridge TN history (from 1994)