Vast plumes of steam are once again issuing from reactor building three at Fukushima Diiachi nuclear plant. they were first noticed on December 19th, then it stopped, then arose again over the Christmas period.
TEPCO has not given any indication where the steam is coming from and what radioactive components are in it.
Unlike the other five reactors, reactor 3 ran on mixed core containing both uranium fuel and mixed uranium and plutonium oxide, or MOX nuclear fuel. The Reactor 3 fuel storage pond still houses an estimated 89 tons of the plutonium-based MOX nuclear fuel composed of 514 fuel rods.
In November, TEPCO, responsible for the decommissioning of the plant, began the highly risky removal of over 1,500 potentially damaged nuclear fuel rods from reactor 4. The reactor is the most unstable part of the plant as it was offline at the time of the 2011 catastrophe and its core didn’t go into meltdown. Instead, hydrogen explosions blew the roof off the building and severely damaged the structure.One of the most dangerous operations attempted in nuclear history was a success as a total of 22 assemblies containing 50 to 70 fuel rods have been transported to a new storage pool. While the extraction of the fuel rods is a significant challenge for TEPCO, a more complex task of removing the cores of the stricken reactors is yet to come.
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Contributed by Chris Carrington of The Daily Sheeple.
Chris Carrington is a writer, researcher and lecturer with a background in science, technology and environmental studies. Chris is an editor for The Daily Sheeple. Wake the flock up!