The radiation levels around the crippled Fukushima Daiichi complex –perfect word– appear to have eased. Two possible causes have emerged. Either the containment structure was breached, or the now-extinguished fire in reactor four pumped radioactive material into the atmosphere.
Whichever was the cause of the spike, it does appear that the containment structure has cracked.
It appears that for the first time, the containment system around one of the Fukushima Daiichi reactors has been breached.
Officials have referred to a possible crack in the suppression chamber of reactor 2 – a large doughnut-shaped structure, also known as the torus, below the reactor housing.
That would allow steam, containing radioactive substances, to escape continuously.
This is the most likely source of the high radioactivity readings seen near the site.
The bottle has broken, but the genie has yet to fully emerge.