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. A resident explains his fears during a town hall meeting on the impact of radiation exposure from the nearby leaking Fukushima nuclear facilities, on March 22 in the town of Kawamata, Fukushima Prefecture. (AP Photo/Wally Santana)
A farmer drains milk into a pit in Iitate, in Fukushima, northeastern Japan, in this photo taken by Yomiuri Shimbun on March 23. Japanese authorities had temporarily advised against allowing infants to drink tap water in Tokyo due to raised radiation levels, and the United States became the first nation to block some food imports from Japan, saying it would halt milk, vegetable, and fruit imports from areas near the tsunami-damaged nuclear plant because of contamination fears. (Reuters/Yomiuri Shimbun)
Originally posted by TheLastStand
reply to post by ethancoop
I've taken better photos on a cell phone camera in the dark 5 years ago. These japanese have the latest and greatest stuff. I don't buy that, I'm sure it was a cell phone camera, I wasn't talking about the blurring, I was talking about the obvious compression artifacts found within the photograph. Some are from compression, some are from the cmos censor, and some are from radiation. We all know there is radiation in those control rooms that is why they HAVE to install lead plates to make them more habitable.
Originally posted by mrrad
Here is a detailed nasa report on how radiation in space effects their CCDs space probe cameras, the basic effects should be the same in a reactor.
Hooked up to what? The core is a closed system... you can't just flow water through it and let it drain out
Originally posted by silent thunder
Hello. I just thought I would inform anyone who is interested that I have returned to Tokyo after leaving Japan for several days. I hope to be providing very bland, hopefully objective reports from an on-the-ground perspective in the days ahead. I just posted the first installment of pics in the RATS forum (access restricted to ATS members with over 200 ATS points). Thank you for your interest.
Radiation spikes in sea near Japan nuclear plant
By Huw Griffiths (AFP) – 1 day ago
SENDAI, Japan — Radiation levels have jumped 10-fold in days in seawater near Japan's tsunami-hit nuclear plant, officials said, as workers battled to stabilise the crippled power station.
Drinking a half-litre (20-ounce) bottle of similarly contaminated fresh water would expose a person to their annual safe dose, said an official who however ruled out an immediate threat to aquatic life and seafood safety.
The iodine-131 level in the Pacific Ocean waters just off the Fukushima plant was 1,250 times above the legal limit -- compared with readings of 126 times higher taken on Tuesday, and 145 higher on Thursday.
"This is a relatively high level," nuclear safety agency official Hidehiko Nishiyama said in a televised press conference on the test results from Friday released by plant operator the Tokyo Electric Power Company (TEPCO).
Assessing the likely impact on aquatic life, Nishiyama added: "Generally speaking, radioactive material released into the sea will spread due to tides, so you need much more for seaweed and sea life to absorb it."
He added that because iodine-131 has a half-life -- the time in which half of it decays -- of eight days, "by the time people eat the sea products, its amount is likely to have diminished significantly."
However, TEPCO in a statement also said that levels of caesium-137, which has a half life of about 30 years, was 79.6 times the legal maximum.
Originally posted by 00nunya00
reply to post by zorgon
Pretty much all animal life on earth is contaminated in some way.edit on 24-3-2011 by 00nunya00 because: (no reason given)
Fukushima – INES scale rating Publication
- March 25, 2011
A new analysis prepared for Greenpeace Germany by nuclear safety expert Dr Helmut Hirsch shows that by March 23 2011, Japan’s nuclear crisis has already released enough radioactivity to be ranked at Level 7 on the International Nuclear Event Scale (INES). This is the scale’s highest level, and equal to the 1986 Chernobyl nuclear disaster.
Hirsch’s assessment, based on data published by the French government's radiation protection agency (IRSN) and the Austrian governments Central Institute for Meteorology and Geodynamics (ZAMG) found that the total amount of radionuclides iodine-131 and caesium-137 released between March 11 and March 23 have been so high that the Fukushima crisis already equates to three INES 7 incidents.
Greenpeace radiation monitoring team begins Fukushima assessment
Scope of the monitoring: This preliminary monitoring work sees the team spend several days documenting radioactive contamination and dose rate levels in the areas north-west of the Fukushima evacuation zone (20km radius from nuclear plant) that have been most affected by the radioactive releases.
Environmental Fate/Exposure Summary :
Cobalt-60 is produced by neutron activation of components of nuclear reactors; these components are made of various alloys of steel that contain metals that can absorb neutrons and produce cobalt-60. Cobalt-60 can also be produced in a particle accelerator. Trace amounts of cobalt-60 are present in the environment worldwide due to fallout from past atmospheric nuclear weapons testing. Cobalt-60 may be released to the environment from nuclear reactors and facilities that process spent nuclear fuel, especially hardware associated with the spent fuel.
A cobalt bomb is a theoretical type of "salted bomb": a nuclear weapon intended to contaminate an area by radioactive material, with relatively little blast.
The weapon's tamper would be of ordinary cobalt metal, which the explosion then would transmute to the radioactive isotope cobalt-60 (60Co), which would produce deadly nuclear fallout.
The cobalt tamper would be transmuted into the isotope 60Co upon initiation and bombardment by neutron radiation. 60Co decays into an excited 60Ni by beta decay. The excited 60Ni then transitions to a ground state 60Ni, releasing gamma radiation.
The concept of a cobalt bomb was originally described by physicist Leó Szilárd, who suggested that an arsenal of cobalt bombs would be capable of destroying all human life on Earth (whether he was actually right is disputable). Cobalt was chosen because of the fallout, that would have a half-life of 5.27 years and would be intensely radioactive at the same time. While there exist isotopes with a longer half-life than 60Co, they are also insufficiently radioactive. Many isotopes are more radioactive (gold-198, tantalum-182, zinc-65, sodium-24, and many more), but they would decay faster, possibly allowing some population to survive in shelters.
To provide a point of reference: to equally distribute 1 gram of cobalt per square kilometer of Earths surface one needs 510 tonnes.
Experts compare Fukushima and Chernobyl disasters
Japan lost much time in dealing with the consequences of an accident at its quake-hit Fukushima Nuclear Power Plant, Russian experts said.
People who dealt with removing the consequences of the 1986 Chernobyl nuclear disaster in Ukraine, or 'liquidators,' compared the two accidents.
"Intensive activity started in Chernobyl on the first day [since the accident], but in Japan, it's very slow. In my opinion, they lost much time and still can't control what is happening," Col. Gen. Nikolai Antoshkin, one of the Chernobyl liquidators, told RIA Novosti on Friday.
Another liquidator, Nikolai Tarakanov, said Fukushima reactors dating back to 1974 cause his concern as they are "too old."
MOSCOW, March 26 (RIA Novosti)