The Chernobyl Reactor is still active.
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.
The Chernobyl reactor is not operational and has been encased in a cement sarcophagus since the 1986 disaster. The temperature inside the sarcophagus is monitored and is not at extreme levels; however, radiation levels are still high in the vicinity.
No, the last reactor was shut down in December of 2000. However, they are still working of cleaning and removal today.
It was not controlled, once the top of the reactor was blown off there was nothing anyone could do. The fuel melted and ran down, whilst the graphite burned away, so this would stop the nuclear reaction. The task then was to put out the fire which was still raising radioactive material into the atmosphere. This was done partly by firemen with hoses (many of whom died from radiation) and by dropping material onto the burning reactor from helicopters.
No, the Chernobyl Nuclear Power Plant is not operational. The last remaining reactor was shut down in December 2000 due to safety concerns and international pressure. Today, the site is primarily used for decommissioning and cleanup efforts.
No, the RBMK design was evolved in the Soviet Union, and has not been used anywhere except Russia and former Soviet Bloc countries like the Ukraine. Russia has now moved to PWR reactors, but I think some RBMK's are still operating there. Existing ones had some mods made after Chernobyl to improve safety. All the Chernobyl reactors are shutdown permanently. this was a condition of EU assistance.
No
No. Chernobyl is still contaminated with nuclear radiation, making this city unsafe to live in.
Chernobyl is a place in the Ukraine which had a nuclear disaster in 1986. I don't know of a WW2 connection, but of course the Ukraine was a war zone when Germany invaded, so there may be some history of that time. Try WW2 category for your question.
After the Chernobyl disaster, cleanup efforts included removing and burying contaminated soil, debris, and plant material, constructing the "sarcophagus" to contain the damaged reactor, and implementing measures to reduce the spread of radioactive material. Thousands of workers, known as liquidators, were involved in the cleanup, with some areas still requiring ongoing monitoring and maintenance today.
I don't know of one specifically, there was still underground nuclear testing at the time so there might have been several that year. If you are thinking of the reactor explosion at Chernobyl that year, that was not a nuclear explosion, just a large steam explosion when the coolant water flash vaporized blowing the roof off the reactor. Once the graphite moderator in the core was exposed to air it caught fire, this was the worst part of the disaster as burning graphite is nearly impossible to put out and the smoke was carrying all kinds of radioactive material from deep in the core.