2.4 Sv/h on the basement floor of reactor1

2.4 Sv/h was measured around this point.



Steel plate lay over the aisle.


Following up this article.. [Video] Tepco identified a leaking part on reactor1 vessel / Pipes are rusted and starting deteriorated [URL]


Tepco measured 2.4 Sv/h on the basement floor of reactor1.

On 5/30/2014, Tepco implemented the follow-up robot survey in reactor1. They ran the robot in torus room to investigate the coolant part called suppression chamber.


From their report, the atmospheric radiation level was 200 ~ 500 mSv/h in most of the areas, but they detected 2,400 mSv/h at one point. A steel plate was detached from somewhere and lay over the aisle to stop the robot moving ahead (The picture above). The pipes were severely contaminated nearby the high radiation level area, but detailed readings are not announced.

This time, video wasn’t published either.





You read this now because we’ve been surviving until today.


Français :

2,4 Sv/h dans le sous-sol du réacteur 1


2,4 Sv/h relevés près de cet endroit.

Plaque d’acier reposant en travers de l’allée.

Article lié : [Vidéo] Tepco identifie l’origine d’une des fuites de l’enceinte du réacteur 1 : Les tuyaux sont rouillés et ils commencent à s’en désintégrer

Tepco a relevé 2,4 Sv/h dans le sous-sol du réacteur 1.
Le 30 mai 2014, Tepco a effectué une expédition robotisée de suivi dans le réacteur 1. Ils ont fait marcher le robot dans la salle du tore pour examiner les endroits du refroidissement de la chambre en surpression.

Selon leur rapport, la radioactivité ambiante était entre 200 et 500 mSv/h à peu près partout mais ils ont relevé 2 400 mSv/h en un point. Une plaque d’acier détachée de quelque part repose en travers de l’allée barrant le passage au robot  (photo ci-dessus). Les tuyaux sont hautement radioactifs près de l’endroit extrêmement radioactif mais le détail des relevés n’est pas communiqué.
Cette fois-ci la vidéo n’a pas été publiée non plus.


Vous pouvez lire ceci parce que nous avons survécu jusqu’à aujourd’hui.

  1. Shutter the WORST of the WORST, please

    Perhaps the USA NRC should join Planet Earth in outlawing the architectural DEFICIENCIES of the General Electric Mark-1 pseudo-containment design. The GE Mark-1 power plants are the WORST of the WORST of the WORST of the civilian operated nuclear power station equipment on the Blue Planet.

    Perhaps the NRC should CANCEL ALL the GE Mark-1 operating licenses, in the USA; rather than extend their licenses by ANOTHER twenty (20) YEARS.

    Is it too much to ask, that the USA NRC outlaw the most hazardous design on EARTH? Pretty Please! Simon says, “Mother May I?”

    Tick-Tock, Tick-Tock

      1. General Electric is the LOSER

        GE Mark-1 –> 3 have failed

        Russian Reactor –> 1 failed

        3X Total Failures

        1. If fukushima engineers had put the batteries up on a nearby hill, or the roof, there’d be no situation. That’s not a factor in the reactor design itself. The russian rbmk is inherently more unstable in operation due to a positive void coefficient, and many other small factors like graphite tips on control rods. Come back and speculate when you know something.

          1. The Fukushima battery banks were designed for 8 Hour Backup. Then they ran down and died like dogs. There was NO source of power to recharge the (Large) Station Batteries. Then the Fukushima-50 used their personal car batteries for control functions.

            Car batteries are too small to pump reactor coolant water.

            Relocation of the dead, 8-hour Station Batteries would not have changed anything.

            The: reactors, containments, filtration and ventilation systems failed and the consequences have been devastating.

            1. Correct.

              But relocation of the backup generators and their fuel tanks would have.

              1. Wrong Again

                Loss of ultimate heat sink DOOMED Fukushima Reactors FDU-1. FDU-2 & FDU-3.

                Broken piping DOOMED FDU-1 AGAIN.

                MOX Fuel DOOMED FDU-3 again.

                  1. Crappy design

                    Loss of ultimate heatsink, due to damage to oceanic heat exchangers and pumps. Also clogging of the water inlets with debris.


            2. I meant to type generators, not batteries. But anyway, weren’t the batteries flooded, and electrical power lost when the tsunami arrived, rather than them running down after 8 hours? The batteries provided DC for power and instrumentation. The functioning of the IC was unavailable due to the lost (flooded) batteries, not depleted batteries as you claim.
              Get your facts straight. Relocation of the batteries would have enabled correct functioning of the IC. Loss of DC also delayed venting and depressurization to allow water injection.

              1. Multiple causes of failure.

                Crappy design, crappy systems, crappy operators, crappy architecture, crappy equipment, crappy forecasting, crappy geological mapping, crappy equipment locations, …

                Pure crap

                  1. More Fukushima Crap

                    Crappy regulators, crappy shills, crappy media, crappy politicians, crappy bankers, crappy investment bankers, crappy IAEA, crappy WHO, crappy icewall vendor, crappy METI, crappy dosimetry, crappy medical treatment, …

                    Pure crap, to the core

                    1. And in other news, our deep water oil drilling platform is working just fine.

                    2. Carbon Footprint

                      The carbon footprint of the Fukushima cleanup effort is Sasquatch size.

                      Whether anthropogenic global warming exists, or ties to CO2 is another matter.

  2. *“The difference between stupidity and genius is that genius has its

    Albert Einstein

Comments are closed.

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.


May 2014