The Worst Nuclear Meltdowns of the Cold War: The History of the Biggest Nuclear Disasters in the United States and Soviet Union

Uranium is best known for the destructive power of the atom bombs, which ushered in the nuclear era at the end of World War II, but given the effectiveness of nuclear power, nuclear power plants were constructed around the developed world during the second half of the 20th century. While nuclear power plants were previously not an option and thus opened the door to new, more efficient, and more affordable forms of energy for domestic consumption, the use of nuclear energy understandably unnerved people living during the Cold War and amidst ongoing nuclear detonations. After all, the damage wrought on Hiroshima and Nagasaki made clear to everyone what nuclear energy was capable of inflicting, and the health problems encountered by people exposed to the radiation also demonstrated the horrific side effects that could come with the use of nuclear weapons.

Thus, it seemed that everyone’s worst fears were realized on March 28, 1979 when the nuclear plant at Three Mile Island suffered a partial meltdown. Since it occurred years before Russia’s Chernobyl disaster took place, the accident, a combination of mechanical and management failures, was at the time the worst civilian nuclear disaster yet, and the predictions of its consequences were dire. Given the release of radioactive material, nearby residents feared for their lives, and the nature of the radioactive contamination meant it would take nearly 15 years and $1 billion to fully clean up after the disaster. 

Ultimately, Three Mile Island paled in comparison to Chernobyl, which to this day remains the most notorious nuclear accident in history. Located in the Ukraine, the Chernobyl power plant was undergoing experiments in the early morning hours of April 26, 1986 when it suffered a series of explosions in one of its nuclear reactors, killing over 30 people at the plant and spread radioactive fallout across a wide swath of the Soviet Union.