Nuclear Regulation Authority “Reactor4 possibly had 2~3 strong explosions in 311”

On 8/30/2013, Nuclear Regulation Authority released their report about reactor4 investigation conducted from this July to August.

In this report, they concluded reactor4 experienced at least 2 strong explosions in 311.

According to their report, the ceiling and floor of S-W part of the 4th floor had a severe damage. Also, the floor of N-W part of the 3rd floor had a serious damage. The investigating team assumed there were 2 major explosion around these areas.

In addition to it, the 5th floor lost the walls on theS, E and W and the roof. There might have been another explosion there according to their report.



You can ignore the truth but the truth won’t ignore you.


Français :

L’Autorité de Régulation Nucléaire : “Le réacteur 4 a sans doute subi 2 ou 3 fortes explosions pendant le 11 mars 2011”


Le 30 août 2013, l’Autorité de Régulation Nucléaire a publié son rapport d’enquête sur le réacteur 4, investigations menées entre juillet et août dernier.

Dans ce rapport, ils concluent que le réacteur 4 a subi au moins 2 fortes explosions en mars 2011.
Selon leur rapport, le plafond et le plancher du sud-ouest du 4e étage est gravement endommagé. De plus, la partie nord-ouest du 3e étage est également gravement endommagée. L’équipe d’investigation considère qu’il y a eu 2 explosions majeures dans ces zones.
En plus de ça, selon leur rapport le 5e étage a perdu ses murs Sud, Est et Ouest et son toit. Ce pourrait bien être aussi à cause d’une autre explosion à cet endroit.

Vous pouvez ignorer la vérité mais la vérité ne vous ignorera pas.

  1. Reportedly, FDNPP Reactor-4 was empty at the time of the Great East Asia Earthquake. If memory serves, the spent fuel had been removed and the new fuel had not been loaded into the reactor.

    That has been the consistent story from Day 1, though everything ever stated by TEPCO should have about 3 leading question marks, 2 internal and another 3 trailing question marks.

    It is clear that the FDNPP structure, reactor and spent fuel pool sustained HEAVY damage and multiple explosions are plausible, based on a quick review of the damage locations.

    Internal USA NRC email indicated that SEVERAL spent fuel fires were raging and ~3-5 Fatal Radiation cases were reported.

    Thus the LIKELY sources for Unit-4 Damage are:

    VENTING of H2 from Unit-3 to Unit-4 in a ventilation failure.

    Direct Blast damage from the Unit-3 Reactor Detonation

    H2 ignition from the Unit-4 Spent Fuel Pool fires and corium slug(s).

    We cannot rule out that TEPCO may have lied about the Unit-4 Reactor. So it is in the realm of possibility that the fuel status of the Unit-4 Reactor was not as reported.

    It is spectacularly EASY to see which direction a blast traveled from the source. So lying is easy to detect with good photograpic evidence.


    Bill Duff

  2. I have never seen the video of 4 blowing up, have you or a copy please post.
    I study photos of blast damage, 4 the blast radius is bigger than the rest, just look at switching station.
    4 blew up before 3 did, why was down for maintenance, have a look on you tube at the effects of a earthquake on a swimming pool, would Snape those rods like matchsticks.
    If it was hydrogen explosion the panels on 4 and 5 th floor would look like the other reactors, blown out but they no longer exist, dust, more powerful explosion or implosion, implosion would make sense if nuclear explosion?

    1. Spring and Autumn are typically periods of low electrical demand. Thus, reportably and plausibly, 3 reactors were in service and 3 reactors were out of service for routine maintenance and/or refueling.

      The FDNPP Unit-3 REACTOR was the biggest televised explosion, by far. The TEPCO salvage operation photographic evidence indicates that Reactor-3 may have vaporized. The reactor, shell vessel and containment are certainly NOT visible in the photograph.


      What percentages of the FDU-3 reactor fuel blew Sky-High, scattered about the campus, and melted through the foundation as corium? How deep have the FDU-3 Corium Slug(s) burned into the earth? How much ex-vessel, ex-shell and subteranean fission is still ongoing from the corium slug(s) of Unit-3?

      Something turned the entire Northern Hemispheric Atmosphere BRIGHT ORANGE, with radioactive Iodine, in March 2011. I suspect Reactor-3 and the burning Spent Fuel Pools. At the time, I referred to it, in blogs, as a Vast Radionuclide Storm.


      Bill Duff

  3. I downloaded the article but, alas it’s in Japanese. Is there an English translation available? The information conveyed in the diagrams and pictures is tantalizing.

  4. curious …. i’ve been hearing a lot about Reactor 4, what is its current status? Do we have any verified, on the ground reports? I’ve heard everything that was written above, but still, we do not know what its current status is: empty, contained, leaking, etc. AThank you for your information, we are getting so little of it as to the immediate activities.

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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.


September 2013