How did the nuclear disaster in japan happen?

Answer 1

What caused the accident? This is a very hard question to answer. The obvious one is operator error. The operator was not very familiar with the reactor and hadn't been trained enough. Additionally, when the accident occurred, normal safety rules were not being followed because they were running a test. For example, regulations required that at least 15 control rods always remain in the reactor. When the explosion occurred, less than 10 were present. This happened because many of the rods were removed to raise power output. This was one of the direct causes of the accident. Also, the reactor itself was not designed well and was prone to abrupt and massive power surges.

Answer 2

Chernobyl was a Russian town that contained a Nuclear Power station. One day, disaster struck as a completely unexplained LOCA occurred. A LOCA is a Lot OF Coolant Accident, where coolant spills out from wherever it is and gets into somewhere it shouldn't be, like a wad of circuitry. This makes everything go haywire and, the long-and-the-short of it is that the Chernobyl Nuclear Power Plant Exploded, blasting deadly particles of nuclear radiation everywhere.

Russia and Northern Europe/Asia are still feeling the repercussions today, almost thirty years later.

Answer 3

The Japanese nuclear power plants, Fukushima I and Fukushima II, were both reported as experiencing failures. First, the former experienced a cooling failure which caused Japan to call for a state of emergency and the evacuation of residents in the nearby zone.

On March 12 there was a large explosion at the Fukushima I plant. The outer structure of one of the buildings had collapsed and workers were injured.

Now workers are desperately trying to prevent a full meltdown of the reactor. 50 workers have remained behind to try last-resort tactics to cool the exposed rods, which are the cause of fear that this may get worse.

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There are a few excellent links, I attached, offering information regarding radiation and how it could affect health. I am adding one more website link which gives a good, easy to understand, info about the development of the nuclear crisis.

The moment nuclear plant chief WEPT as Japanese finally admit that radiation leak is serious enough to kill people. Read more at the related link below.

Answer 4

When the Nuclear Disaster happened, it was caused by a broken Radiation Pump.

The sequence of events is as follows:

1. the earthquake caused damage to reactor systems
2. various sensors responding to the quake and/or the damage, caused the control system to automatically shutdown the reactors and activate the emergency cooling water pumps
3. diesel powered generators started automatically when the plant quit generating electricity to keep the control system and pumps powered [up to here things were going mostly the way they were designed to handle such a situation]
4. the tsunamis flooded the diesel powered generators, shutting them down causing the emergency cooling water pumps to stop, letting the reactors overheat
5. a series of explosions resulted damaging the reactors further, causing releases of radioactive gasses (whether these were steam explosions or hydrogen/oxygen explosions we don't know yet -- they were not nuclear explosions); the latest information seems to indicate hydrogen/oxygen explosions which also suggests at least partial meltdown of the cores

After this things become more complicated. We may not know what really happened until long after things are under control and an investigation completed. Wish we still had Richard Feynman.

BTW, there is no such thing as a Radiation Pump.

Answer 5

At 1.23am April 26th 1986 operators in the control room of Reactor4 made a mistake with a routine safety check that led to an explosion and fire that lasted 10 days. It released radio-active fallout which spread over tens of thousand sq.miles and drove more than a quarter of a million people from their homes.

Answer 6

Because they were left unattended during a disaster,the technicians ran away instead of remaining at their posts to shut down and seal off the reactors...

Answer 7

The Japan Tsunami/Earthquake/"Disaster" happened on March 11, 2011.

Well, here it would be the 10th when it happened, but in Japan it was the 11th.

Answer 8

The accident happened after a earthquake hit in march.