Fukushima. The Disaster Background. Dec 16, 2011 14:27:16 GMT -5
Post by joeneubarth on Dec 16, 2011 14:27:16 GMT -5
Fukushima was a boiling water reactor (BWR) in the same shape as the photo above of a BWR in the United States.
The reactor is in the middle of that mass of metal. The large ring at the base is used to suppress steam that needs to be vented to the outside, usually in an emergency.
If you look carefully at the photograph you can see men standing on the suppression ring and on the side of the reactor. The realization, of course is that the Reactor is very big. To fill it with Uranium and Plutonium Fuel (in that center part) takes tons of fuel. So, if there is a meltdown, a lot of radioactive particulate can be released. Many, many times the magnitude of a Nuclear Bomb.
When built into a reactor building the entire assembly is placed into the ground with layers of cement under the reactor and suppression ring as seen in the cut-away diagram below.
Not that the reactor is effectively built inside a concrete tomb. That is to contain radioactive particulate if there is an accident that does not rupture the building as has happened at Fukushima.
Below is the photo taken of Fukushima Reactor Three after it had an explosion in Mid March of 2011 after the meltdowns.
Can you see the tracks of cement dust across what is the top of the Turbine Building for Reactor Three. Reactor buildings are designed with blowout panels if there is a sudden increase in pressure. As you can see the blowout panels did, indeed, blow out. One of the panels fell through the roof into the turbine building. Others blew right across the turbine building. You can even see where the panels nipped the combing on the edge of the roof of the turbine building.
That was one heck of an explosion! An explosion that released a tremendous amount of radioactive particulate into the Northern Hemisphere. Radioactive particulate that is going to cause millions of cases of cancer.