Japan's nuclear concerns explained - What happened? Disaster

This is a video about what happens inside a nuclear reactor. Follow the steps (The clips are marked with a number...) And also shows the disaster..
Lets hope it won't get any worse... And pray for the workers inside, who tries to help. 5 people are already dead, might because of the radioactive stuff.

1.Reactor basics
There are several different types of nuclear reactors, including boiling water reactor systems and pressurized water reactor systems. The reactors at the Fukushima Daiichi plant are boiling water reactor systems. Here's how they work:

At the heart of a nuclear reactor is the reactor vessel, a large steel tank filled with water. It's loaded with 12-foot-long fuel rods made of radioactive pellets encased in zirconium alloy. These ceramic fuel pellets are usually made of enriched uranium 235, which is incapable of creating a nuclear explosion.

Reactor No. 3 at the Fukushima Daiichi plant used more toxic mixed-oxide (MOX) fuel rods, which contain a mixture of uranium and plutonium that is reprocessed from spent uranium.

2.Normal operation
The speed of the chain reaction and the temperature of the fuel are also controlled by the water in the reactor vessel. If the reaction is properly controlled, it reaches a point of equilibrium known as "criticality," in which the amount of heat produced remains constant.

The heat generated by the nuclear reaction boils the water in the reactor vessel, turning the water into steam. This steam flows out of the reactor vessel through pipes to steam turbines. As the steam turns the turbines, generators connected to the turbines spin and generate electricity.

The steam then travels to a condenser unit, which cools the steam, turning it back into water. This water is pumped back into the reactor, where it is used again to control the reactor temperature and reaction speed.

3.The earthquake and tsunami
Three of Fukushima Daiichi's six reactors were already shut down for inspection prior to the earthquake and tsunami. The three reactors that were in operation shut down automatically in a matter of seconds when the quake struck.

Even though the control rods were fully inserted to slow the fission chain reaction to a stop, the reactor was still extremely hot. This is known as decay heat, which will be present for months or even years. Cool water is still needed to keep the reactor fuel from overheating and possibly melting.

4.The explosions
It's still unclear exactly what happened, but what is certain is that several explosions rocked the Fukushima Daiichi nuclear power plant in the days after the earthquake and tsunami.

The first explosion occurred in the reactor No. 1 building on Saturday, March 12. A second explosion occurred on Monday, March 14, at reactor No. 3. A third explosion occurred early Tuesday, March 15, at reactor No. 2.

While these explosions caused significant damage to the exterior buildings that house the reactors, it was unclear if the concrete and steel containment vessels suffered any damage.

5. How bad is 'bad'?
The International Atomic Energy Agency (IAEA) developed the International Nuclear and Radiological Event Scale to identify the severity of incidents involving nuclear energy.

Chernobyl was a level 7 accident, the highest level, denoting a "major accident."

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[eddiemch1]

Uranium 235 is only used in light water reactors, fast breeder reactors use uranium-238 which are the majority as uranium 238 is the most common source of uranium. True uranium 238 can be used to produce plutonium 239 however you need a non domestic power plant as you have to take the reactor offline to extract the plutonium

[ArmedWarhead]

Tacticle mute in bound 

[c0ssu1]

this song is good for this video =)

[bubuteishvili]

THIS SONG IS CANCER OF YOUTUBE

[yorryyorry]

@FreeNBK2000 the steam goes straight to the turbines and does leave the reactor building. because this is a BWR Boiling Water Reactor. Pressurized water reactors have 3 loops, boiling water reactors only two. because the reactor already generates steam so there is no additional heatexchanger needet.

[FreeNBK2000]

The steam does not leave the reactor and go straight to the turbines.

Uranium 235 is precisely what they build nuclear weapons out of

[BLACKDARK80]

@bluescrod The song is called 009 Shit System -This song fucking sucks

[bluescrod]

what is the name of this song?? the music looks nice to me...

[bluescrod]

@ 1:04 is the Chernobyl reactor, not the Japanese one

Just to clear it :-)

[JTfromSTL]

OH MY GOD NOT THIS FV<KING SONG AGAIN~~~