Tag Archive: Japan


NCNUKE has received an update from GE Hitachi headquarters in Wilmington NC.  It contains very insightful information.  Read their press release and NCNUKE’s take on it below.

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Japanese Cabinet Secretary Yukio Edano reported that the approximately 50 workers who had been working on cooling the crippled reactors at Fukushima Daiichi had been temporarily withdrawn.  A sudden spike in radiation levels caused the safety measure.  As always we at ncnuke will try to break down some of this information for our readers. Continue reading

The influential Washington based think tank , The Institute for Science and International Security;  states that the situation in Japan is more serious than the International Nuclear and Radiological Events Scale (INES) present rating of 4 out of 7.  They claim the scale should now rate the disaster as a 6 out of 7.  And that it may need to be rated as a 7 out of 7.  We will give are readers a breakdown of the scale.

 

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     GE Hitachi Spokesman Michael Tetuan released the following statement to ncnuke. Continue reading

Some background for our readers.  Fuel rods are removed from a reactor during the refueling process.  The old rods that are removed are referred to as spent fuel.  These rods, although no longer optimal for producing electricity in a reactor are still highly radioactive and filled with energy.  This spent fuel has long been the biggest problem in the electrical industry. Continue reading

This is to advise our readers that NCNUKE has urged the State Department to send the Kaman K-Max unmanned helicopter to Japan.  Kaman along with Lockheed has been testing this heavy lift design for years.  It can lift 6000 lbs.  Can be operated remotely, and could be used virtually around the clock.  See the links below. Continue reading

Authorities in Japan are now reporting that fuel rods are melting at the 3 crippled reactors.  Their containment vessels are still intact preventing a catastrophic radiation release.  It shows that Japanese authorities attempts to cool the reactors have failed so far.  They have reported that up to 180,000 have been evacuated.  Newer experimental reactor designs like Pebble Bed Reactor’s are virtually meltdown proof.  These older GE Mark 1 BWR require massive cooling  Continue reading

Despite the unfolding tragedy in Japan.  GE Hitachi in Castle Hayne is reporting that all 44 workers are safe.  They are arranging for their safe return.  When a reactor needs service the utility brings in off site technicians to expedite the labor intensive work.  Jobs such as refueling and repairs require many more people than the utility has on staff.  This is because

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As we have discussed here before, The GE Mark 1 BWR (Boiling Water Reactor) has its root in the 1950,s.  Back then the engineers could not have imagined supporting this design in the year 2011.  It is sort of like trying to get a 1955 Chevy to meet all of todays safety and crash standards.  In fact GE has done a remarkable job.  It is also a testament to the sheer robustness of the design.

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The answer to that question is being sought by the American people.  The troubled Fukushima reactors are GE Mark 1 BWR designs.  These reactor cores stay hot for days if not weeks following an emergency.  Their massive plumbing networks are their Achilles heel during a massive earthquake.  The reactors work by creating heat and superheating the surrounding water.  That water is then turned into steam and turns a massive turbine under high pressure.  It is then cooled and returned.  All of the plumbing is meant to contain these massive pressures and heat.  The huge external stresses caused by the earthquake and tsunami have severely damaged the system.  In a later post we will discuss the newer more inherently safer technologies.  Designs like the Traveling Wave Reactor, Pebble Bed Reactor, and a handful of new mini reactor designs.  For now all we can do is pray for Japan.