Ale mi to jednak na niską chmurę wygląda.
EDIT: Pomroczność jasna mnie dopadła- toż to dym.
Użytkownik Mich4 edytował ten post 17.03.2011 - 00:52
Napisano 17.03.2011 - 00:49
Użytkownik Mich4 edytował ten post 17.03.2011 - 00:52
Napisano 17.03.2011 - 00:49
Napisano 17.03.2011 - 00:53
Napisano 17.03.2011 - 00:55
Napisano 17.03.2011 - 01:05
Napisano 17.03.2011 - 01:09
Napisano 17.03.2011 - 01:11
"To answer the question of why Fukushima is not like the Chernobyl situation .... the reactors are of completely different design.
Chernobyl was a graphite-moderated reactor, hundreds of tons of graphite (carbon) interposed amongst the fuel rods. Over the years, that became highly contaminated with radioactive compounds. When it overheated and exploded, much of the graphite spewed out in an instant - and the remainder caught fire, the smoke carrying even more contamination into the atmosphere. An old and unsafe design - maintained by persons of very questionable training.
Fukushima is a much more modern design. No flammable and dispersable graphite is used - boron containing moderator rods plus the water acts as a moderator (neutron-slowing agent) also. The containment structures are vastly superior.
A melt-down at Fukushima means that the fuel rods and metallic supporting structures will liquify and form a puddle on the floor of the containment structure. It will not explode into the air. It will not burn. It will not melt a hole through the bottom of the containment. The metals will soon oxidize, become a ceramic.
Very small amounts of radioactive gasses - mostly water vapor and a trace of non-metallic substances from the fuel rod assemblies - may "boil off" the hot mass. Being vapors, they will disperse rather quickly. Being mostly light elements, the half-life of the radioactivity is likely to be rather short too.
Yes, there will be a horrible mess, however it will be entirely confined to the reactor building save those traces of vapor mentioned above. It will be necessary to saturate the material with neutron-absorbing substances and maybe try to sub-divide the mass to kill off the chain reaction.
The material will need to be placed into strong containers and taken away for further processing. An alternative is to just pour concrete over everything and entomb the material - but this isn't the best choice since leakages could happen in the future as the concrete shrinks and cracks.
The risk from Fukushima is short-term - from the radioactive steam mostly - and will end as soon as the melted core substances can be cooled. The evacuation zone downwind of the plant is a sensible precaution and may need to be expanded somewhat. It won't last forever, but it may take months to cool off all the involved reactors."
Napisano 17.03.2011 - 01:11
Napisano 17.03.2011 - 01:13
Użytkownik kudlaty88 edytował ten post 17.03.2011 - 01:14
Napisano 17.03.2011 - 01:14
Napisano 17.03.2011 - 01:16
Napisano 17.03.2011 - 01:19
Mówiłem że coś mi tu nie gra.
Już jak szukałem tej kamerki myślałem że to nie elektrownia atomowa ...
Napisano 17.03.2011 - 01:21
Użytkownik Koho edytował ten post 17.03.2011 - 01:21
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