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Originally posted by Hopeforeveryone
reply to post by Krzyzmo
reply to post by liejunkie01
Ok i'll say it.... how strange you both post the same picture within a few seconds of each other ! freaky
DigitalGlobe has released a new satellite image of the Fukushima Daiichi nuclear site in Japan taken at 10:20AM local time on March 18, 2011. The most significant difference in the new image is the lack of any visible steam above the damaged reactor building for unit 3. In both the March 16 and March 17 images, steam can be seen venting out of the top of the building.
Originally posted by Unity_99
Getting truth out now is going to be grassroots from people, it won't be from them.
Originally posted by zorgon
Originally posted by Unity_99
People are already being hospitalized because of sodium iodide pills with all the scare tactics. I will BET you that more people will get sick or die from those pills than those form any radiation. Considering your misinterpretation of Mox fuel use, I would be more catious
Do you happen to have a link on that? I googled it a few different ways and find nothing at all to say that is true. If we want to make sure everyone is telling the truth and not "fear mongering", we should all post links to reliable sources before making any outrageous claims that are based in opinion and not facts.
Originally posted by 00nunya00 I forget what it was called, I will go back and search the thread for the pic after I post this, but do you know if that's the case in these reactors? I never said anything about it because I figured if these actually used the graphite, it would be mentioned as the same risk during full meltdown.
The plants at Fukushima are so called Boiling Water Reactors, or BWR for short. Boiling Water Reactors are similar to a pressure cooker. The nuclear fuel heats water, the water boils and creates steam, the steam then drives turbines that create the electricity, and the steam is then cooled and condensed back to water, and the water send back to be heated by the nuclear fuel. The pressure cooker operates at about 250 °C.
The nuclear fuel is uranium oxide. Uranium oxide is a ceramic with a very high melting point of about 3000 °C. The fuel is manufactured in pellets (think little cylinders the size of Lego bricks). Those pieces are then put into a long tube made of Zircaloy with a melting point of 2200 °C, and sealed tight. The assembly is called a fuel rod. These fuel rods are then put together to form larger packages, and a number of these packages are then put into the reactor. All these packages together are referred to as "the core".
The Zircaloy casing is the first containment. It separates the radioactive fuel from the rest of the world. The core is then placed in the "pressure vessels". That is the pressure cooker we talked about before.
The pressure vessels is the second containment. This is one sturdy piece of a pot, designed to safely contain the core for temperatures several hundred °C. That covers the scenarios where cooling can be restored at some point.
The entire "hardware" of the nuclear reactor - the pressure vessel and all pipes, pumps, coolant (water) reserves, are then encased in the third containment. The third containment is a hermetically (air tight) sealed, very thick bubble of the strongest steel. The third containment is designed, built and tested for one single purpose: To contain, indefinitely, a complete core meltdown. For that purpose, a large and thick concrete basin is cast under the pressure vessel (the second containment), which is filled with graphite, all inside the third containment. This is the so-called "core catcher". If the core melts and the pressure vessel bursts (and eventually melts), it will catch the molten fuel and everything else. It is built in such a way that the nuclear fuel will be spread out, so it can cool down.