Which nuclear disaster took place in 1986 in the erstwhile USSR?

Answer 1

a) a nuclear disaster falls under physics, not chemistry
b) Yahoo Answers does not exist to do your homework for you.

Answer 2

1986 (April 26) Chernobyl 4 (Pripyat, USSR) explodes and burns, spreads contamination worldwide. Thirty three are killed from heat and radiation exposure. Worldwide effects from internal contamination are harder to measure.

The first to die were the fire fighters. Telyetnikov, a fire captain who was off duty but returned to help out, was asked why they went on top of the turbine building to toss chunks of burning graphite reactor core (mixed with hunks of reactor fuel) back into the reactor. Why did they climb up there into a lethal radiation field? His answer was, "If we did not do it, who would?"

The accident was caused when an electrical engineer was trying to see if the turbines spinning down after a reactor trip would still have enough electrical energy to power safety injection pumps to pump water into the reactor core. Unfortunately, the experiment was held up a few times and the reactor core became very unstable at low power. All the control rods were pulled out and the water flowing through the reactor was cold (moderating the neutrons). The control rods could not be inserted quickly enough and even as they were inserted, they added a little bit more reactivity. The result was a criticality excursion that lead to a steam explosion which lifted the lid of the reactor and caught the graphite of the core on fire.

Later attempts to contain the burning core were disastrous, in particular dropping bags of lead onto the fire from helicopters. The lead vaporized and the crew wound up getting quite a bit of dose. Eventually a large sarcophagus was built around unit 4. It is now crumbling and falling into itself. Not a good solution but the best that they could do at the time.

There is not much money for remediation of the area surrounding Chernobyl. Besides, Chernobyl is not the worst of the sites of radiological contamination in the former USSR. Try the area in the south Urals called Cheylyabinsk-40 or Mayak. Along the Techa river.

Answer 3

Erstwhile Ussr

Answer 4

Chernobyl Nuclear Plant, Ukraine.

Answer 5

Chernobyl

Answer 6

Chernobyl, in Ukraine.

Answer 7

who cares you sour puss above me. they still get the education. why dont you not waste a post. like you just made me do

Answer 8

chernobyl

Answer 9

chernobyl