1.9E+9Bq of beta nuclide leaked

Contaminated water leaked at reverse osmosis membrane of desalination unit. (After collecting gamma nuclides)

  • 4/27/2012  9:17 Sob-contract company worker found water leakage.
  • 9:30  Tepco employee stopped the desalination unit.
  • 9:35  Water leaking alarming system finally started working in water purification control room.
  • 10:19  Caught the leaking water by a plastic bag and stopped leakage by Valve isolation operations.
  • 10:20 ~ 11:10  Collected leaked water.
  • Leakage amount was 36L.
  • Radiation level of the surface, Gamma : 1mSv/h    Beta : 7mSv/h    Alpha : Unknown
  • Reason : Unknown.
  • Leakage amount of radionuclide : Cesium 134  5.4E+4   Cesium 137  7.5E+4    Total beta 1.9E+9



1.9E+9Bq of beta nuclide leaked


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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 2012