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Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
I think that a remote controlled helium balloon would be better for indoor use, virtually unlimited flight time, low power hovering, negligible draughts/wind to disturb scene .....
Probably (with an emergency deflate option etc.) better for outdoor surveying at Fukushima too, on non-windy days, for the same reasons as above. Possibly enough lift to support radiation shielding for the electronics?
worst case ... a sniper could easily bring down the craft ... a good feature.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
If they can build an ice wall (which seems a deliberately short-term policy) then surely they can build a concrete wall (if necessary directly behind the temporary ice wall) so the question is; why go for a temporary solution with obvious failure modes?
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
Sulaiman wrote ...
If they can build an ice wall (which seems a deliberately short-term policy) then surely they can build a concrete wall (if necessary directly behind the temporary ice wall) so the question is; why go for a temporary solution with obvious failure modes?
Perhaps the plan intends to freeze solid and keep frozen the entire ground around the reactors, which would stop the flow of aqueous fluids, but not necessarily (radioactive) ions which can migrate through water ice faster than you'd think.
See here:Ionic Migration in Frozen Soils and Ice,d.d2k and here: ,d.d2k&cad=rja
As we saw admitted last month, there is as yet no plan, as no one knows what to do about the corium, so we are seeing only plans and investigations preparatory to making a Grand Plan, so I guess that freezing the ground is the best stop-gap measure they can think of.
I wonder if they have considered the possible formation of ice lenses and displacement of the ground by frost heave:
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Fukushima
