[Video column] Fukushima Diary talks “Tepco washing off Plutonium to the Pacific, huge risk for the least effect”

Tepco plans to start discharging the bypass water to the Pacific from this coming June, but alpha nuclides including Plutonium-238/239/240 and Uranium-235/238 will not be tested nor filtered.

It would decrease only 10~25% of the groundwater flowing to the plant buildings, but why do they have to take such a risk ?

When they finish building the underground wall on the seaside, the stopped groundwater may come up to the bypass well point as well.

Fukushima Diary thinks it’s nothing but a performance of the government of Japan and Tepco to show as if they could be still doing something, they had a card in their hand.





Downplay it in the beginning, and quietly add more information so nobody notices it. All for not letting the cattle escape. This is their strategy.


Français :

[Édito Vidéo] Les entretiens du Fukushima Diary : “Tepco lessive le plutonium dans le Pacifique, un risque énorme  pour un effet minimum”


Tepco préviot de commencer le déversement des eaux de la dérivation dans l’océan Pacifique à partir du mois de juin mais sans en mesurer ni filtrer les alpha-nucléides comme les plutonium 238/239/240 et uranium 235/238.
Ça devrait diminuer de 10 à 25 % seulement le flot des eaux souterraines qui inondent les bâtiments de la centrale, mais pourquoi doivent-ils prendre un tel risque ?
Les eaux souterraines bloquées pourront rejoindre et dépasser les puits de forage lorsqu’ils auront fini de construire le mur souterrain du côté mer.
Le Fukushima Diary pense qu’il ne s’agit que d’un numéro du gouvernement japonais et de Tepco voulant faire croire qu’ils sont toujours en train de faire quelque chose, ils avaient cette carte en main.

Le minimiser au début et ajouter tranquillement de nouvelles information pour que personne ne le remarque. Tout pour que le troupeau ne s’échappe pas. C’est leur stratégie.

  1. “Fukushima Diary thinks it’s nothing but a performance of the government of Japan and Tepco to show as if they could be still doing something,”

    sad, but true

    even more sad
    its just a part of a performance thats been going on
    for the last 3 years

  2. Since there’s already 3 billion tons of naturally occurring uranium dissolved in the ocean I doubt this is going to make much difference.

    1. Perhaps we are concerned with:

      Strontium-89, Strontium-90, Yttrium-90, Zirconium-95, Niobium-95, Ruthenium-106, Rhodium-106, Antimony-125, Iodine-131, Xenon-133, Caesium-137, Caesium-134, Cerium-144, Protoactinium-147, Europium-154, Plutonium-238, 239, 240, 241, Americium-241 and 243, Curium-242,243,244, as well as Uranium 238,235 and 234.


      1. Well perhaps you are. If you are I would suggest that you review the concept of half-life as many of those radionucliedes can be easily crossed off your list of concern.

        It’s been 1128 days since the reactors shut down.

        Xenon-133 has a half-life of 5.243 days.

        So to calculate how much of the Xenon-133 that existed when the reactors shut down is still around you use the handy formula: 2^(-duration/half-life) which is 2^(-1128/5.243) = 1.7e-65 or to put it another way

        99.999999999999999999999999999999999999999999999999999999999999998 % of the Xenon-133 that was originally there no longer exists.

        Iodine-131 has a half-life of 8.02 days.

        2^(-1128/8.02) = 4.5e-43 or to put it another way 99.99999999999999999999999999999999999999995 % of the Iodine-131 that was originally there no longer exists.

        1. Cold Shut Down,

          It appears that the Japan definition for ‘cold shut down’ may allow for +/- 7 months continued fission. Fission products, including Xenon were detected by the South Korean government, not too long ago. Perhaps they sourced from Fukushima Daiichi, North Korea or a nuclear navy accident.

          ‘We are concerned’; as in ‘We’ have learned not to trust the government of Japan to use words and terms with their traditional meanings.

          Show Me

          1. South Korea detecting Xenon in South Korea which is not detected at FD is a sign of fissions at FD?

            Oh Bill, you’re so funny.

            1. South Korea detected Xenon.

              Japan did not say squat. Silence and exclusionary detailing are not even denials. Japan’s TEPCO alter ego denials are pitiful and unworthy.

              Fukushima remains on the suspect list.

              How does that old rhyme go?

              ‘Where oh where’

              Where, oh where did the Corium Go?

              Where, oh where can it be?

              The muon detectors search high and low.

              Oh where, oh where, can it be?

              1. Well, look at it this way, where ISN’T the corium? It isn’t flung across the northern hemisphere, turning the sky orange in a Great Radionuclide Storm, even if that sounds very dramatic. It ISN’T on the moon, nor did it vanish into thin air. It most likely slumped to the bottom of the pressure vessel, and possibly fell through to the bottom of the containment. It’s not magic fairy dust which can teleport to new locations. It obeys gravity and thermal-hydrolic equations, and is accurately modeled by IRSN’s ASTEC simulations. On the other hand we have Mr Bill Duff, singing fairytale rhymes.

                1. Fukushima Fuels

                  The Atomic Explosion in FDU-3, did in fact scatter nuclear fuel and fission products to the winds.

                  What remains, of the FDU-3 MOX fuel; added to the FDU-1 and FDU-2 UOX fuel; form the Corium Slugs. Perhaps by now the Corium locations are MUON mapped. However, the Corium slugs are undisclosed.

                  Japan continues to lie; by omission, commission and exclusionary detailing.

                  Fukushima Fools

                2. Wow! That has to be the most you have articulated in one reply in months! Why the sudden verbal diarrhea?

                  Note that IRSN’s ASTEC simulations are just that – simulations! How did you come to the conclusion that they are indeed accurate? Was it the fairy dust that compelled you?

                  Nice to see that you qualify your remarks with terms such as “most likely”, “possibly” & “fairytale”.

                  The more you reply, the more you betray yourself and your terms of reference.

                  1. Well Duh, Dud

                    Resolution is inversely proportional to Wavelength. Scatter is a general physical phenomenon.

                    I operated electron microscopes, and took quantum physics in frigging college. The use of a different subatomic particle is not exactly a complicated jump; for the technically savvy. Positive and negative images are fairly simple stuff.

                    What is your problem? If the Japanese are having troubles doing a MUON mapping; then they should just say so.


                    Bill Duff

                  2. Different wavelengths

                    FLIR, Forward Looking Infra Red surveillance is a relatively long wave electromagnetic spectrum. Thus the photos are kinda grainy, with poor detail. Still, they are more detailed than we would like pointed at our homes by curious neighbors and/or snoopy government officials.

                    Maybe this kind of stuff is out of your league, Dud.

                    Seems fairly simple to engineers, physicists and mathematicians.


    2. naturally occurring uranium

      as a ton of banana’s

      your comparing apples to oranges

      the uranium (238 ect) is much more radioactive

      But then I think we all know that don’t we

      1. Reactor fuel is 96% U238 and 4% U235

        Natural uranium is 99.3% U238 and 0.7% U235

        I know you fervently wish to believe that the world wasn’t already radioactive before man split the atom but it was.

        1. Plutonium,

          The OP Title: “Tepco washing off Plutonium to the Pacific, huge risk…”

          Thus, the concern should probably be concentrated on the more dangerous, Higher ACTIVITY radioisotopes, such as Pu-238, Pu-239 & Pu-240.

          http www epa gov/ (radiation/radionuclides/plutonium) html

          Plutonium is a silvery-grey metal that becomes yellowish when exposed to air. It is solid under normal conditions, and is chemically reactive. Plutonium has at least 15 different isotopes, all of which are radioactive. The most common ones are Pu-238, Pu-239, and Pu-240. Pu-238 has a half-life of 87.7 years. Plutonium-239 has a half-life of 24,100, and Pu-240 has a half-life 6,560 years. The isotope Pu-238 (rocket fuel) gives off useable heat, because of its radioactivity.

  3. A table of nuclides for review of the Fukushima ‘witches brew’.

    http atom kaeri re kr/ (ton/tool/nuchart/nuchart1) gif

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About this site

This website updates the latest news about the Fukushima nuclear plant and also archives the past news from 2011. Because it's always updated and added live, articles, categories and the tags are not necessarily fitted in the latest format.
I am the writer of this website. About page remains in 2014. This is because my memory about 311 was clearer than now, 2023, and I think it can have a historical value. Now I'm living in Romania with 3 cats as an independent data scientist.
Actually, nothing has progressed in the plant since 2011. We still don't even know what is going on inside. They must keep cooling the crippled reactors by water, but additionally groundwater keeps flowing into the reactor buildings from the broken parts. This is why highly contaminated water is always produced more than it can circulate. Tepco is planning to officially discharge this water to the Pacific but Tritium is still remaining in it. They dilute this with seawater so that it is legally safe, but scientifically the same amount of radioactive tritium is contained. They say it is safe to discharge, but none of them have drunk it.


April 2014