It was in the Ukraine, however it affected many countries across Europe and the world
The #4 reactor is the reactor at the Chernobyl Nuclear Power Plant (Pripyat, Ukraine) that exploded on April 26, 1986. It is still the worst nuclear accident to ever take place anywhere.
Russia, the nuclear plant was in the place called chernobyl :)
That is in Ukrainia.
Chernobyl, Ukraine, 1986
Those reactions that take place in functioning nuclear reactors (i.e not Chernobyl or Fukushima when the accidents happened).
I think the Chernobyl accidence happened immediately, but Fukushima happened take I think 2 days
approximately 25,000 years
The disaster occurred on On 26 April 1986 at 01:23:40 a.m, in the then USSR, It is now located in Ukraine, a former soviet state.
The cleanup and containment efforts following the Chernobyl disaster, which occurred in April 1986, took several years and involved extensive measures. Initial decontamination and emergency response efforts lasted for about a year, but ongoing cleanup and remediation work continued for decades. The Chernobyl Exclusion Zone remains in place today, reflecting the long-term nature of the disaster's impact. Full decommissioning of the site and surrounding areas is projected to take several more decades.
The worst nuclear accident occurred on 26 April 1986 at the Chernobyl Nuclear Power Plant in the Ukraine (under the management of authorities in Moscow).
The cleanup and decontamination efforts following the Chernobyl disaster were extensive and ongoing. Initial containment and cleanup activities took place from 1986 to 1987, involving hundreds of thousands of workers. However, significant decontamination and monitoring efforts continued for decades, with some areas remaining restricted due to radiation. Full environmental recovery is expected to take many years, potentially up to a century or more in certain regions.