Category Archives: water leaks to sea

60 mill Bq released to air, over 200 mill Bq leak to sea each hour

On December 16 it was reported  that Levels of radioactive materials released outside the plant have declined to 60 million becquerels per hour, one-13 millionth of the levels at the time when the accident occurred. Additional radiation levels at the plant … Continue reading

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Biggest ever nuclear spill to ocean – 27 petaBq of Cs-137 is 20 times TEPCO’s estimate says IRSN

TEPCO earlier estimated that Cs-137  in the sea totalled  about 1 petaBq, and the JAEA earlier estimated 4 petaBq, compared to this estimate of 27 petaBq (see Table 1 here).  The major difference is that TEPCO counted only water leaks,  … Continue reading

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Cesium levels off Fukushima Prefecture 58 times higher than before quake

Levels of radioactive cesium 137 in waters off Fukushima Prefecture are 58 times higher than before the March 11 quake that crippled a nuclear power plant there, a government survey shows. The science ministry conducted sophisticated sensitive analysis of seawater … Continue reading

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Cesium levels off Fukushima Prefecture 58 times higher than before quake

Cesium levels off Fukushima Prefecture 58 times higher than before quake BY HIROSHI ISHIZUKA STAFF WRITER 2011/10/07 Levels of radioactive cesium 137 in waters off Fukushima Prefecture are 58 times higher than before the March 11 quake that crippled a … Continue reading

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Do silt sences filter radioactive particles from water ?

probably not… see the new page here

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Officials did not warn of extra radiation due to rain and wind on March 15 – though half radiation fell onto ocean

A new JAEA report says that people were exposed unnecessarily because government warnings did not take into account the heavy rain after reactor 3 blew up, or the fact that the wind was blowing onshore at that time, instead of … Continue reading

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15,000 Terabequerels in ocean contamination – not 4,700 as TEPCO estimated. difference is air deposition

TEPCO has admitted two major water leaks from the plant, this study calculates some of the air-deposition.   Other water-leaks from the plant are still not included (as are strontium and other isotopes which may be of the same magnitude). … Continue reading

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Unit 3 is built on a layer of permeable rock that extends to sea

As shown in this diagram, the Reactor and Turbine Buildings of Unit 3 appear to be build in a layer of permeable rock that extends under the seabed of the intake canal. From the diagram, it is hard to tell … Continue reading

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70-fold rise in sea-water radioactivity in last week near Unit 3

Radioactivity in the sea off Unit #3 went up by a factor of at least 70 times between August 28 and September 5, to the highest level for two months, but it does not seem directly related to the typhoon. … Continue reading

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Underground water barrier to be built in 2 years – 800 metres long

The 800 metre wall just off the intake canals has been the obvious way to limit water leaking to the ocean, but it is a bit late., and very slow.   I called a contactor in Queensland who said they … Continue reading

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