By now is should be obvious that we cannot build nuclear heat engines safely using the most commonly operated systems. I suspect that the Candu design come closest to an inherently safe system.
At Fukushima, it is not obvious that they were able to extract much of the fuel at all. The only thing that we can be sure of is that the folks in charge have been lying and stonewalling while attempting to soldier on. I think that they are still trying to simply recover spent rods outside the reactors.
What we knw now is that years of serious effort is ahead of us.
“It may have been caused by nuclear fuel that would have melted and made a hole in the vessel, but it is only a hypothesis at this stage,” Tepco’s spokesman Tatsuhiro Yamagishi told AFP. “We believe the captured images offer very useful information, but we still need to investigate given that it is very difficult to assume the actual condition inside.” [source]
“Up to very recently, the interest in Spirulina was mainly in its nutritive value. Currently, however, numerous people are looking into the possible therapeutic effects of Spirulina. Many pre-clinical studies and a few clinical studies suggest several therapeutic effects ranging from reduction of cholesterol and cancer to enhancing the immune system, increasing intestinal lactobacilli, reducing nephrotoxicity by heavy metals and drugs and radiation protection.”
- Kelp and other seaweeds
- Zeolite or bentonite clays
- High-dose vitamin C
- Sweet whey (for producing detoxifying glutathione)