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Archive for the ‘Chernobyl’ Category

EU Nuclear Plants Plagued by Problems

Posted by feww on October 3, 2012

DISASTER CALENDAR SYMBOLIC COUNTDOWN: 1,260 Days Left

[October 3, 2012] Mass die-offs resulting from human impact and the planetary response to the anthropogenic assault could occur by early 2016. 

  • SYMBOLIC COUNTDOWN: 1,260 Days Left to the ‘Worst Day’ in Human History

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Global Disasters/ Significant Events

“Hundreds of problems” found in EU’s nuclear plants

Hundreds of problems have been discovered in nearly all the EU’s 143 nuclear plants, with specific failings in all 58 of France’s nuclear reactors, according to a leaked report.

  • More than 100,000 people live within a 30-km radius each of 47 nuclear power plants with a total of 111 reactors.
  • “On the basis of the stress test results practically all [nuclear plants] need to undergo safety improvements,” says the leaked draft. “Hundreds of technical upgrade measures have already been identified.
  • “Following the accidents at Three Mile Island and Chernobyl, urgent measures to protect nuclear plants were agreed. The stress tests demonstrated that even today, decades later, their implementation is still pending in some member states.”
  • Four reactors in two unnamed countries would have less than an hour to restore safety functions if electrical power was lost, the report adds.

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Global Disasters: Links, Forecasts and Background

GLOBAL WARNING

Posted in Chernobyl, Chernobyl nuclear disaster, Chernobyl reactor, chernobyl victims, Europe nuclear disaster, Fukushima NPP, highest risk of nuclear disasters, nuclear accidents, nuclear disasters | Tagged: , , , , , , , , , , , | 1 Comment »

Hydrogen Building Up at Reactor 1, Fukushima NPP

Posted by feww on April 6, 2011

UPDATED at 13:00UTC

Will the Scope of Fukushima Nuclear Disaster Widen?

Based on the information available, FIRE-EARTH believes there’s a strong probability that the extent of Fukushima nuclear disaster could widen to directly impact large population centers in Japan up to a 250 – 300km radius of the plant, which includes Tokyo Metropolitan Area.

The reactor vessel or sections of its attachments in one or more of the severely damaged reactors at the plant could explode releasing humongous amounts of radiation into the environment [Probability ≥66% as of posting,] dwarfing the Chernobyl disaster by a massive factor.


Hydrogen gas may be accumulating in Reactor 1 at Fukushima NPP: TEPCO

Tokyo Electric Power Company (TEPCO) said it may have to inject nitrogen gas into Reactor 1 at the stricken Fukushima NPP to prevent a possible explosion from hydrogen buildup, NHK reported.

According to another report, TEPCO is preparing to also pump nitrogen into Reactors 2 and 3.

Buildup of hydrogen gas in three of the reactors at Fukushima NPP caused several explosions following the Great Eastern Japan Earthquake and tsunami which crippled the plant on March 11.

Injection of nitrogen gas is meant to dilute the amount of oxygen and hydrogen gasses and prevent them from reaching critical concentration levels, 5 and 4 percent respectively, at which an explosion occurs. 

Meanwhile TEPCO announced that it had stopped the flow of highly radioactive water into the ocean from a cracked concrete duct near Reactor No. 2 , using a sodium-silicate compound as a sealant.

Remembering Chernobyl Victims


The sarcophagus covering the damaged fourth reactor at the Chernobyl nuclear power plant is seen behind a building decorated with a graffiti in the abandoned city of Prypiat April 4, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world’s worst civil nuclear accident took place, on April 26. Engineers are still struggling to regain control of damaged reactors at the Fuskushima plant after last month’s earthquake and tsunami, in the worst nuclear crisis since Chernobyl in 1986, with the government urging the operator of the plant to act faster to stop radiation spreading. REUTERS/Gleb Garanich. Image may be subject to copyright. Reuters images …

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Posted in Chernobyl, Chernobyl explosion, Chernobyl nuclear disaster, chernobyl victims, environment | Tagged: , , , , | Leave a Comment »

UPDATE: Japan Nuclear Disaster

Posted by feww on April 5, 2011

UPDATE 12:00UTC

TEPCO has revealed that it had found radioactive iodine-131 at 7.5 million times the legal limit in seawater samples taken on Saturday near the stricken Fukushima NPP.

Samples taken on Monday showed the radioactive level at 5 million times the legal limit. The new samples also  contained radioactive cesium-137  at 1.1 million times the legal limit, the company said.

Why have oceans if you couldn’t…

Japan to dump 11,500 tons of “low-contaminated water” into the Pacific ocean

Workers at Fukushima Dai-ichi NPP have begun dumping “low-radioactive” water  into the ocean allegedly to free up  storage room for  more highly radioactive water.

TEPCO says they are dumping 11,500 tons of radioactive-water, currently held at the crippled Fukushima NPP storage facilities, into the Pacific ocean so that the more radioactive-water that is leaking from Reactor 2 can be stored in its place.

Does that mean when even more highly radioactive water is found at the site they can dump the second load into the ocean?

Meanwhile in Germany…

“A decision has been taken to shut down eight plants before the end of this year and they definitely won’t be reactivated. And the remaining nine will be shut down by the end of the decade,” a German deputy environment minister, told Reuters on Monday.

“Japan has shown that even if there is a miniscule occurrence, the residual risk is too high to justify the continuation of nuclear power […] It is better to go for other energy services in a civilized country,” Juergen Becker said.

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 (e.g, 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

*Note:  Radiation dose of about 2,000 millisieverts (200,000 millirems) cause serious illness.

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

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Posted in Chernobyl, Chernobyl nuclear disaster, chernobyl victims, environment, Half-life | Tagged: , , , , , , | 1 Comment »

Fukushima Radiation Leak NOT Fixed

Posted by feww on April 3, 2011

Japan Nuclear Disaster Update – April 3

Radioactive contaminated water still leaking into the ocean at a rate of about 2 liters per second: TEPCO

More than7 tons  of radioactive water is leaking into the ocean every hour, Tokyo Electric Company said, NHK reported.


A 20-cm crack at the bottom of a concrete duct near Reactor 2 at Fukushima NPP is releasing more than 7 tons or radioactive water into the ocean. Photo released by TEPCO.


An inlet to the damaged maintenance duct near Reactor 2.
Photo released by TEPCO.


Cement mix poured to block crack in the duct
.
Photo released by TEPCO.

Summary of Latest Developments:

  • Contaminated water in the duct is emitting more than 1,000 millisieverts per hour (100,000  millirems per hour)* of radiation into the surrounding environment.
  • Seawater samples taken 330 m south of the plants on March 31 contained both radioactive iodine-131 at 4,385 times and cesium-137 at 527 times above the legal limits. Cesium-137 has a half life of 30 years and persists much longer than iodine (half-life = 8 days, see also list below).
  • Workers made an unsuccessful attempt to plug the crack using concrete.
  • A second attempt made earlier today to fix the crack using a mixture of a chemical polymer, sawdust and shredded newspaper also failed.
  • TEPCO is preparing for a third attempt to plug the leak, using an absorbent gel which expands to contain water and is usually included in baby diapers and litter trays for pets.
  • About  164,000 people are currently living in shelters
  • At least 70,000 people have been evacuated from a 20 km exclusion zone of Fukushima NPP.
  • Up to  140,000 people live inside the next 10 km zone, who have been urged to leave or stay indoors.
  • “The impact of the nuclear crisis is expected to go on for a long time,”  Japan’s Chief Cabinet Secretary Yukio Edano said earlier today.

*Note:  Single radiation dose of 2,000 millisieverts (200,000 millirems) and above causes serious illness. See also exposure list below.

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

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.

Related Links

Posted in Chernobyl, Chernobyl nuclear disaster, fukushima nuclear disaster, Fukushima Nuclear Power Plant, Fukushima Nuclear reactor, Japan Nuclear alert | Tagged: , , , | 3 Comments »

Smoke Detected at Japanese Nuke Plant

Posted by feww on October 10, 2008

Japan’s Nuclear Cowboys

Sensors detected smoke at Tokaimura nuclear complex about 120km northeast of Tokyo on Friday. Smoke was detected at a solid waste facility where metal waste is incinerated. The operator claimed there was no release of radioactivity.

The fuel reprocessing center in Tokaimura was the scene of an uncontrolled nuclear chain reaction in September 1999 which killed two employees and contaminated about 700 people with radiation.

“Japan’s nuclear power program has a history of accidents and lax oversight. In August, liquid containing uranium splashed out of a container at a nuclear fuel plant southwest of Tokyo, exposing two people to radiation.” AP reported.


Engineers at Tokaimura plant triggered the world’s worst nuclear accident since Chernobyl. Credit: New Scientist. Image may be subject to copyright.


Emergency response personnel at the site of the Tokaimura criticality accident, Japan, September 30, 1999. Source: The Encyclopedia of Earth.

Posted in BNFL, Chernobyl, enriched uranium, nuclear fuel | Tagged: , , , , | Leave a Comment »

World’s Worst Polluted Places

Posted by feww on February 1, 2008

Top 10 Worst polluted places [Source: Blacksmith Institute]

CHERNOBYL, UKRAINE

Estimated No. of Affected People: Initially 5.5 million [the figure is now disputed.]

Escaped Pollutants: Radioactive dust including uranium, plutonium, cesium-137, strontium and other metals

Source of Pollution: Meltdown of reactor core in 1986

victims-sl.jpg

The Incident: A meltdown of the reactor’s core in the Chernobyl power plant killed thirty people in 1986. About 135,000 people were evacuated. It is believed that about one hundred times more radiation was released in the accident than by the atom bombs dropped over Hiroshima and Nagasaki in 1945.

Legacy: More than 4000 cases of thyroid cancer were diagnosed among children and adolescents between 1992 to 2002 in Belarus, Russia and Ukraine. Victims under 14 years were most severely affected by the elevated concentrations of radioiodine found in milk.

Incidents of skin lesions, respiratory ailments, infertility and birth defects were readily found among the more than five million people who inhabit the affected areas of Belarus, Russia, and Ukraine for many years following the accident.

Disputed Facts: The above facts, however, have been disputed by a number of individuals including the author of a recent WHO report, and the retired “nukophile” British academic, James Lovelack. Local and international experts, however, have dismissed the WHO report findings.

Posted in Belarus, birth defects, Chernobyl, Russia, Ukraine | 5 Comments »