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No Fuel In the Fukushima Reactor #1

Posted by ryuzaki0 on from the oh-this-old-thing? dept.

An anonymous reader writes To nobody's surprise, the Japanese press reports that a new way to look at the inside of one of the Fukushima 1 damaged reactors has shown the fuel is not in place. Engineers have not been able to develop a machine to directly see the exact location of the molten fuel, hampered by extremely high levels of radiation in and around the reactors, but a new scan technique using muons (details on the method in the media are missing) have shown the fuel is not in its place. While Tepco's speculation is that the fuel may be at the bottom of the reactor, it is a safe bet that at least some of it has burned through and has gone on to create an Uruguay syndrom.

4 of 234 comments (clear)

  1. Re:What on earth by Anonymous Coward · · Score: 5, Informative

    It's Japanese for "China Syndrome"

  2. Re:What on earth by digitalPhant0m · · Score: 5, Informative

    I think they are trying to be clever and play on the term China Syndrome, where the fuel melts all the way through the earth to it's Antipodal point.

    But since this is Japan, the author speculates that the antipodal point is somewhere in Uruguay, which it is not (it's kinda close though).
    You can check here: Antipodal Map

  3. The genius of holes by RSilverlok · · Score: 5, Informative

    Remember, building one at fukushima-Daichi contained a G.E. mark one (BWR) which has holes in the bottom that the control rods would supposedly use. If the fuel is not in the core it would quickly have melted the seals around those holes and oozed into the CV ( 'containment' vessel ). On estimate, it would only take about four hundred pounds of corium ( melted fuel globs) to burn through the CV bottom. This would have taken less than 24 hours from the initial incident. Since the core contained tons of material it is impossibly naive to believe that it is even remotely contained. BUT more importantly, since reactor #1 doesn't have any core material , and it was one of the least spectacular 'explosions' at the plant, How can Tepco get anyone to believe that the really spectacular explosion at three did anything less than blow core materials through the roof like the world's nastiest party popper?

    1. Re:The genius of holes by Anonymous Coward · · Score: 5, Informative

      Because if there had been any dispersal of reactor core materials, it would sort of have been obvious? Like "In the red forest near Chernobyl, where most of the large particles loaded with reactor fuel fragments rained down, literally everything was dead within days" obvious?

      Radiation spectrometers are really quite good at identifying the radioactive elements present based on the energies of the gamma rays. Virtually all contamination from Fukushima is volatiles: Cesium, strontium, iodine, xenon. Things that would have been coming off corium as vapor then either continuing as vapor or contaminating the water droplets inside before floating out. Nonvolatile elements don't generally become airborne of a whim; unless you have e.g. a burning reactor core at Chernobyl to make small particles, and a ferocious thermal convection updraft to waft them up. And even there, most of the horrible transactinide-laden particles rained down within a few miles.