Nowhere as far as I can find.
Perhaps you are thinking of the 1986 Chernobyl steam explosion and graphite fire. This was in the USSR and although the graphite fire melted much of the core, it was not a meltdown in the usual sense associated with nuclear reactors.
chernobyl
In the 1980s, a nuclear reactor exploded and burned near the town of Chernobyl in the former Soviet Union, now located in Ukraine. The Chernobyl disaster on April 26, 1986, is considered one of the worst nuclear accidents in history.
The nuclear reactor that exploded and burned in the 1980s was located near the town of Chernobyl in Ukraine. The Chernobyl disaster, which occurred in 1986, released a significant amount of radioactive material into the environment and is considered one of the worst nuclear accidents in history.
i think in the 1980s
south Africa
from 1945 until the 1980s, the US.since the 1980s, the USSR and now Russia.
The Chernobyl disaster
Because it was changing people's DNA
Europe
The US slowed its construction of nuclear power plants in the 1980s primarily due to the Three Mile Island accident in March 1979. This incident, which involved a partial meltdown at a Pennsylvania nuclear facility, raised significant safety concerns and public fear about nuclear energy. In the aftermath, regulatory scrutiny intensified, and many utilities faced increased costs and delays, leading to a halt or cancellation of numerous planned projects. Additionally, economic factors and the rise of alternative energy sources contributed to the decline in nuclear plant construction during this period.
From 1945 until the late 1970s or early 1980s the United States always had the most nuclear weapons. After then the USSR/Russia has had the most nuclear weapons.
By the late 1980s, nuclear power contributed approximately 15% of the total electricity generated in the Soviet Union. The country had developed a significant nuclear power program, operating several reactors and expanding its capacity throughout the 1970s and 1980s. The Chernobyl disaster in 1986, however, had a profound impact on nuclear energy policies and public perception, leading to a decline in the expansion of nuclear power in the years that followed.