Meltdowns also likely occurred at No. 2, No. 3 reactors of Fukushima plant, Asahi Shimbun, May 18, 2011:
And like the No. 1 reactor, the melted fuel appears to have created holes in the pressure vessel of the No. 3 reactor, according to the data of Tokyo Electric Power Co. released May 16. [...]
At the No. 3 reactor, the melted fuel may have burned through the pressure vessel to the containment vessel, the data showed. [...]
According to the data, the pressure in the pressure vessel of the No. 2 reactor dropped at 6:43 p.m. on March 15. A similar drop in pressure also took place at the No. 3 reactor at 11:50 p.m. on March 16.
Those declines were apparently the result of holes made in the pressure vessels. [...] it appears that melted nuclear fuel formed new holes in the pressure vessels. [...]
Radioactive materials, such as technetium, produced when nuclear fuel rods are damaged, have been detected in water in the No. 3 reactor building. That discovery has raised speculation that the melted nuclear fuel has breached the pressure vessel and landed in the containment vessel.
No. 3 reactor… is the only one at the site loaded with a mixed fuel known as mox, for mixed oxide, which includes reclaimed plutonium. -NYTimes
Published: May 18th, 2011 at 1:58 am ET