It is hard to get a comprehensive view of this problem because the Japanese themselves either don't know what is going on or do know and aren't
saying.
The OP's linked video does say at one point that the government is going to step in and try to build a subterranean wall around the site to prevent
ground water from flowing under it and becoming contaminated. Obviously this is a large project but it has to be done. There should be an
international effort brought to bear on this very important project. The United Nations should be stepping in and extending all the help it can in the
way of "moral suasion" directed at the world community.
Japan should not be vilified or belittled. Massive help should be directed to them in a spirit of fellowship and friendship. I'm sure they know all
the psychological dimensions of the trouble they
and we are in. It doesn't have to be reiterated.
The problems they face are fivefold:
1. How to deal with the build up of stored contaminated water.
2. How to prevent more groundwater from being contaminated.
3. How to clean up the physical plant, including stored spent fuel rods.
4. How to deal with the concentrated melted fuel which has burned through the containment level of the plants into the ground below.
5. How to deal with the radioactive elements that have already reached the ocean via run off of contaminated groundwater or through direct contact
with melted fuel.
Solutions:
1. The stored contaminated water will ultimately have to be filtered of its radioactive heavy elements.
Science already has some ways to do
this, but it may have to innovate totally new ways of doing this. In the short term more storage tanks will have to be put in place.
2. The "coffer dam" around the plant should be a top priority. There should be international input on this because it is a very important and
doable element of the solution list.
3. The physical plant is a huge problem, especially the spent fuel rods held in cooling tanks. This is another area where an international effort from
the leading experts around the world on nuclear plants, and mechanical and civil engineering problems will be necessary. This is a toughie, and the
rods are a high priority.
4.
The most dangerous, potentially, of the problems faced at Fukushima is the condition (how dispersed) and most importantly,
location
of the radioactive "lava" that has melted through the containment layer of the reactors. Depending on the subterranean geology of the area, it is
possible that this lava could migrate, following the path of least resistance, underground to a point where it came into contact with the ocean. This
would be catastrophic.
It would be many times worse than what is currently happening at the site, the leak of contaminated water into the ocean. Instead of pouring tea into
the ocean, it would be like dumping tea bags into the ocean.
One hopes that the radioactive lava just melts and sinks vertically in a classic "China Syndrome". If it does not, that could be a problem that is
solvable by doing a massive underwater effort or
it could be unsolvable by any means.
5. There is technology to mine heavy elements out of sea water using filters. Work is being done all the time to improve this technology and to make
it more effective and even "element specific". The "science cavalry" is riding to the rescue on this one. I think they will get the job done.
If you had a cup of tea with too much sugar in it, could you find a way to get the sugar level reduced so that the tea is drinkable again? I couldn't
but I bet scientists could. That in effect is what the efforts directed toward heavy metal filter mining are about.
This is a coming technology. It is possible that some application of this technology will be operative off the coasts of all nations before long and
probably permanently off the coast of Japan. We will have micro applications of it as well to treat drinking water.
This tech is not just filters, but includes biological constituents and nano particulates to latch onto radioactive particles in water.
In the long term
humanity must master radioactivity. We've mastered other physical and natural processes but we lag behind with radioactivity.
We need to learn how to stop and start the process in the lab and to industrialize this mastery in order to deactivate radioactive waste.
edit on 2-9-2013 by ipsedixit because: (no reason given)
edit on 2-9-2013 by ipsedixit because: (no reason
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edit on 2-9-2013 by ipsedixit because: (no reason given)