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Archive for the ‘Fermi nuclear power plant’ Category

Radiation Leak Found at Fukushima

Posted by feww on April 2, 2011

Japan Nuclear Disaster Update – Apr 2

Radiation near Reactor 2 in Fukushima NPP measures 1,000 millisieverts per hour

TEPCO, operator of the crippled Fukushima NPP, has found radioactive water leaking into the sea from a cracked concrete duct near Reactor 2, NHK said.


A TEPCO employee points to the inlet of a cracked concrete duct containing power cables near Reactor 2 at Fukushima Daiichi Nuclear Power Plant where contaminated water,  emitting radiation at 1,000 millisieverts per hour, is  leaking into the sea, April 2, 2011. Source: TEPCO

“With radiation levels rising in the seawater near the plant, we have been trying to confirm the reason why, and in that context, this could be one source,” said deputy head of Japan’s Nuclear and Industrial Safety Agency (NISA).

“There could be other similar cracks in the area, and we must find them as quickly as possible.”  Mr Nishiyama added.

TEPCO  is planning to pour concrete into the duct in an attempt to stop the leak, a company spokesman was quoted as saying.

The US Energy Secretary, Steven Chu, estimated on Friday that about 70% of one reactor core and 30% of another were severely damaged. However, these figures have not been confirmed by TEPCO.

What is a lethal dose of radiation from a single Exposure?

Studies of the 1945 atomic bombing at Hiroshima and Nagasaki show that 100 percent of victims whose bodies were exposed to 600,000 millirems (6,000 mSv) died from radiation. About 50 percent of victims who received  450,000 millirems (4,500 mSv) of radiation also died.

(Note: Rem is a unit of ionizing radiation equal to the amount that produces the same damage to humans as one roentgen of high-voltage x-rays.  Source: MIT)

1 rem = 10 mSv  (1 Sv = 100 rem)

Background Radiation in millirems per year (mrem/yr)

  • Average background radiation (US):  300
  • Higher altitudes (eg. Denver): 400

“Safe Levels” of Radiation (U.S.)

Limits above natural background radiation levels (average 300 millirems per year) and medical radiation:

  • Occupation Limit: Maximum of 5,000  (the limit for a worker using radiation)
  • Average Natural Background: 300

[Note: Lifetime cumulative exposure should be limited to a person’s age multiplied by 1,000 millirems, e.g., a 70-year-old person, 70,000 millirems.]

Adults

  • Max single dose for an adult: 3,000
  • Annual total dose: 5,000

Under 18

  • Max single dose for a person aged under 18 years: 300 millirems (whole body equivalent)
  • Annual total exposure: 500

Fetal Exposure

  • Maximum limit for fetal exposure during gestation period:  50 millirems per month above background levels

Medical

  • Single Chest X-ray (the whole body equivalent): 2 millirem

Air Travel

  • Coast-to-coast US round trip flight: 12 millirems

Megaquake and Tsunami Death Toll

The latest figures released by the authorities put the number of dead at about  12,000 with 16,000 people still listed as missing.

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Deadly Tornadoes Turn U.S. Midwest into ‘War Zone’

Posted by feww on June 7, 2010

Tornadoes and thunderstorms have killed at least seven people in U.S. Midwest, destroyed 50 homes, damaged many more and forced Fermi nuclear power plant to shut down

At least 7 people have been killed, more than a dozen injured, 50 houses destroyed and many more damaged in north-western Ohio, according to the officials.


US Weather forecast snapshot. Click image for an update.

The states of Illinois and Michigan have also been severely affected by the extreme weather, local reports say.

The Lake Township, one of the worst-hit areas was described as being “like a war zone,” by its Police Chief Mike Hammer [Mark Hummer.]

Michigan

Fermi nuclear power plant, located on the shore of Lake Erie, Michigan, was forced to shut down after strong winds seriously damages one of the buildings.

Illinois

The city of Streator in Illinois has been seriously damaged by high winds and thunderstorms. About 2 dozen [50] people were taken to hospital, and 30 buildings sustained “major structural damage,” the  Streator Mayor was reported as saying.

“I saw people coming out of their homes right after the tornado hit; a second story of a house was taken off,” an eye-witness said.


Eastern and
Midwest U.S. Satellite image. GOES East AVN COLOR IR CH4. CLICK HERE to UPDATE!


Goes North America Satellite image Snapshot. Click image to update.

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