One of the radiation resistant robots developed by Sarcophagus engineers to trundle through the ruin's interior. Reportedly, Ukraine offered its nuclear emergency assistance to Japan very early on, but the Japanese declined because they didn't want associations with Chernobyl. For such a robotically excellent country, it seems odd that there are no radiation resistant robots being used in the Fukushima emergency. But that is evidently because the Japanese nuclear industry didn't want to pay for them so they never got developed.
After 25 years, the Sarcophagus itself is radioactive waste. With financing from 26 donor countries, the New Safe Confinement was supposed to have been completed by 2008. But the date keeps getting pushed back. Now it is 2015.
It is likely that similar tombs await Fukushima, which just doubled the odds of similar worst cases disasters happening at one of the worlds 443 nuclear reactors in the coming decades.
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