Fukushima Daiichi - a two-fer
Great series on dismantling the Fukushima Daiichi reactor from the Institute of Electrical and Electronics Engineers (pronounced "Eye-triple-E"):
First -
the job:
Dismantling Fukushima: The World's Toughest Demolition Project
A radiation-proof superhero could make sense of Japan�s Fukushima Daiichi nuclear power plant in an afternoon. Our champion would pick through the rubble to reactor 1, slosh through the pooled water inside the building, lift the massive steel dome of the protective containment vessel, and peek into the pressure vessel that holds the nuclear fuel. A dive to the bottom would reveal the debris of the meltdown: a hardened blob of metals with fat strands of radioactive goop dripping through holes in the pressure vessel to the floor of the containment vessel below. Then, with a clear understanding of the situation, the superhero could figure out how to clean up this mess.
Unfortunately, mere mortals can�t get anywhere near that pressure vessel, and Japan�s top nuclear experts thus have only the vaguest idea of where the melted fuel ended up in reactor 1. The operation floor at the top level of the building is too radioactive for human occupancy: The dose rate is 54 millisieverts per hour in some areas, a year�s allowable dose for a cleanup worker. Yet, somehow, workers must take apart not just the radioactive wreck of reactor 1 but also the five other reactors at the ruined plant.
Second -
the tools:
Meet the Robots of Fukushima Daiichi
Entering the Danger Zone: In March 2011, a series of meltdowns and explosions turned the Fukushima Daiichi nuclear power station into a radioactive ruin. The damaged reactor buildings are far too radioactive for humans to safely work in, so robots are surveying radiation levels and starting the cleanup. The PackBot, an inspection bot from iRobot of Bedford, Mass., was one of the first bots to arrive at the site.
Slideshow -- unfortunately, this website doesn't play nice with
Deslide.
Posted by DaveH at February 28, 2014 12:55 PM