Robert Hunziker writes at CounterPunch:
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The Fukushima multiple nuclear disasters continue spewing out hot stuff like there’s no tomorrow. By all appearances, it is getting worse, out-of-control nuclear meltdowns.
On June 19th Tepco reported the highest-ever readings of strontium-90 outside of the Fukushima plant ports. The readings were 1,000,000 Bq/m3 of strontium-90 at two locations near water intakes for Reactors 3 and 4. Tepco has not been able to explain the spike up in readings. The prior highest readings were 700,000 Bq/m3. (Source here).
Strontium-90 is a byproduct of nuclear reactors or during the explosion of nuclear weapons, e.g., it is considered the most dangerous component of radioactive fallout from a nuclear weapon (Source: HyperPhysics, Dept. of Physics and Astronomy, Georgia State University). It is a cancer-causing substance because it damages genetic material (DNA) in cells. Strontium-90 is not found in nature. It’s a byproduct of the nuclear world of today, e.g., strontium-90 was only recently discovered, as of August 2014, for the first time ever, by the Vermont Health Department in ground water at the Vermont Yankee Nuclear Power Station (Source here).