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Posts Tagged ‘half-life radioactive’

Fukushima Nuclear Disaster Update – March 30

Posted by feww on March 30, 2011

Radiation Rises in Seawater near Fukushima NPP

Radioactive iodine was detected at 3,355 times the legal limit in seawater some 330 meters south of Japan doomed Fukushima Daiichi nuclear plant, said Japan’s nuclear safety agency.

Iodine 131 is believed to have caused the high incidence of thyroid cancer among children living near the Chernobyl plant when the 1986 nuclear disaster occurred.

Highly radioactive water has inundated at least 3 reactor buildings and is also  found elsewhere at the stricken nuclear plant.

Half-life of some radioactive elements

[NOTE: Half-life is the time taken for a radioactive substance to decay by half.]

  • Cesium-134 ~ 2  years
  • Cesium-137 ~ 30 years
  • Iodine-131 ~ 8 days
  • Plutonium-239 ~ 24,200 years
  • Ruthenium-103 ~ 39 days [Ruthenium is a fission product of uranium-235.]
  • Ruthenium-106 ~ 374 days
  • Strontium-90 ~ 28.85 years  [Strontium-90 is a product of nuclear fission and is found in large amounts in spent nuclear fuel and in radioactive waste from nuclear reactors.]
  • Uranium-234 ~  246,000 years
  • Uranium-235 ~ 703.8  million years
  • Uranium-238  ~ 4.468 billion years

Source: Various

TEPCO UPDATE

The most ridiculous news out of Tokyo Electric Power Company (TEPCO): Chairman Tsunehisa Katsumata has told reporters that he thinks Fukushima Reactors 1 to 4 MAY HAVE TO BE SHUT DOWN PERMANENTLY!

[REALLY?]

Also, is he implying that Reactor 5 and 6, or any part of the Fukushima Dai-ichi for that matter, are still safe?

Death Toll

The number of people dead or missing from the megaquake and tsunami on March 11 stands at about 28,000 people.

Aftershock

Meanwhile another strong aftershock measuring 6.0Mw struck off the east coast of Honshu about 246 km (152 miles) ENE of Tokyo, USGS/EHP reported.

Japan Meteorological Agency (JMA) had not reported this quake, as of posting.

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