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The report begins: "In the worst case, any radioactive cloud from Japan's damaged nuclear plant is likely to be limited to the densely populated nation - unlike the wider fallout from the Chernobyl disaster, experts say."

Japanese emergency workers check resident survivors for signs of radiation contamination, 03/16/11. (photo: Asahi Shimbun/Reuters)
Japanese emergency workers check resident survivors for signs of radiation contamination, 03/16/11. (photo: Asahi Shimbun/Reuters)



Analysis: Worst-Case Nuclear Cloud Seen Limited to Japan

By Alister Doyle, Reuters

16 March 11

RSN Special Coverage: Disaster in Japan


n the worst case, any radioactive cloud from Japan's damaged nuclear plant is likely to be limited to the densely populated nation - unlike the wider fallout from the Chernobyl disaster, experts say.

The 1986 blast in then-Soviet Ukraine, when the reactor exploded, contaminated large parts of Europe in the world's worst nuclear disaster. At the Fukushima plant, the explosive potential within the six reactors is easing with time.

"In the worst case, a radioactive cloud would not go that far up in the atmosphere," said Jan Beranek, head of environmental group Greenpeace's International Nuclear Campaign.

"That is good news for the world, but bad news for Japan."

Despite assurances by Japanese authorities about low health risks, the crisis at the Fukushima plant has worsened since Friday's quake-caused tsunami, with desperate, unsuccessful attempts on Wednesday to water-bomb the facility.

"We are at the beginning of the catastrophic phase," Sebastian Pflugbeil, president of the private, German-based Society for Radiation Protection, said of Japan's efforts to pull the Fukushima plant back from the brink.

"Maybe we have to pray," he said, adding that a wind blowing any nuclear fallout east into the Pacific would limit any damage for Japan's 127 million population in case of a meltdown or other releases, for instance from spent fuel storage "ponds."

Japan's nuclear crisis may have taken its most dangerous turn yet, after the head of the US nuclear regulatory body said one of the pools containing highly radioactive spent fuel rods at the stricken plant had run dry.

Japan placed top priority on Wednesday on efforts to cool down a plutonium-fueled nuclear reactor at Fukushima - the only one of six not fueled by less hazardous uranium. Some countries advised their nationals to leave the country.

Many experts expect the outcome to be worse than the partial reactor meltdown at Three Mile Island in the United States in 1979, which caused no widespread health damage, but less severe than Chernobyl.

A U.N. study estimated that there could be 4,000 to 9,000 extra cancer deaths from Chernobyl, but Greenpeace has said that the disaster could cause more than 250,000 cancer cases, including 100,000 fatalities.

"In Chernobyl the whole plant core exploded," said Malcolm Crick, Secretary of the U.N. Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). "But there was also a lot of heat and that lifted it high into the atmosphere."

He said Fukushima was "a serious situation but it's too early to say" what the worst outcome could be.

Malcolm Grimston, a nuclear expert at the Chatham House think-tank in Britain, said Fukushima was not like Chernobyl.

"We're nearly five days after the fission process was stopped, the levels of radioactive iodine will only be about two-thirds of where they were at the start, some of the other very short-lived, very radioactive material will be gone altogether by now," he said.

"The situation may recede or deteriorate and lead to a massive radiation leak to the atmosphere," said Professor Javier Dies, head of Nuclear Engineering at the Polytechnic University of Barcelona. "As things stand, this cannot be ruled out."

A key warning sign would be if plumes of cesium are emitted from the plant, according to Richard Barrett, a former US Nuclear Regulatory Commission member who led the regulator's emergency response center.

"When cesium comes out, that means your temperatures have reached the 4,000 and 5,000 degree level," he said.

After that, the next step would produce "transuranics" such as strontium, plutonium and americium.

"If you begin to see those things then it may be an indication that the accident has proceeded to the next step," he said. "The core would have melted through the bottom of the vessel ... and it is on the floor of the reactor cavity."

Greenpeace's Beranek said that heavy pollution from cesium could make some areas of Japan near the plant uninhabitable, at least for decades, as happened around Chernobyl. Pflugbeil also said some areas might be off-limits.

Laurence G. Williams, Professor of Nuclear Safety at the John Tyndall Institute for Nuclear Research in Britain, said he did not see a Chernobyl-type blast as likely.

"I can't think of anything at the moment that would drive that explosive force," he said. "It will just be a melting, or a degrading, heating up of the fuel which will just crumble into a heap like what happened at Three Mile Island."

Richard Wakeford, of the Dalton Nuclear Institute at the University of Manchester, said in a statement that words like "apocalypse" and "catastrophe" were "utterly inappropriate" about the situation at Fukushima and could cause unnecessary panic.

Leaks from Fukushima have already spread some radiation from the plant, briefly raising levels in Tokyo to 10 times normal levels, but are far below the level of a catastrophic release that would pose a wide threat to human health, experts say.

Crick at UNSCEAR said that long-term exposure after Chernobyl for people living in Ukraine, Belarus and Russia was about 10 millisieverts, the equivalent of the radiation in one CT scan. People pick up about 2.4 millisieverts a year in background radiation.


Additional reporting by Gerard Wynn in London, Vera Eckert in Frankfurt, Sylvia Westall in Vienna, Martin Roberts in Madrid and Matt Daily in New York; editing by Mark Trevelyan, Phil Berlowitz.

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+15 # readerz 2012-11-10 11:09
Thank you for posting this article, although it should be the top headline on the e-mails. I lived through the era of the Civil Rights marches, and by sheer luck, I happened to see then Sen. Hubert Humphrey's speech in the Senate that introduced the Civil Rights Act of 1965. If there was ever an Act of Congress that should have been a Constitutional Amendment, and applying to all states not just a few, that should have been it. Everybody who was born after that time has no idea what things were like before that Act was passed, and not just in the south.

If key provisions are overturned, that means the "majority" of southern voters will immediately revert to non-black and non-Hispanic voters. There used to be literacy questions for those who wanted to vote (to a white: "Spell cat." to a black: "Spell terrestrial.") There was also a poll tax that made it expensive to vote: now that tax is hidden in the costs of obtaining voter I.D.s for the elderly. There was severe voter intimidation, such as the coal company that fired people after Pres. Obama was reelected.

We need the Civil Rights Act extended to cover all 50 states and protect the vote for all citizens, including U.S. citizens who live in U.S. territories. America's election system is a disgrace, and does not need any more reductions in the right to vote.
 
 
+10 # bingers 2012-11-10 11:35
Time for Thomas, Scalia, Alito and Roberts to have massive heart attacks before they screw us again. ;o)
 
 
+21 # panhead49 2012-11-10 11:36
Chief Justice Roberts - have you ever ventured into the south? Racism is still alive, well and thriving. And spreading. As should the authority of the Voting Rights Act. Yeah, I know, this conflicts with OMG white is no longer the only color that matters.

Your ruling on Citizens United blew up in your face - messing with the Voting Rights Act may well blow this country up. If anything it should be expanded. Yeah Arizona, I'm looking at you.
 
 
+2 # readerz 2012-11-10 22:00
I love it: change the name of the GOP to the OMG.

Lots of people sent in their dollars that they could not afford to send to try to match the billionaires' millions. This is no way to run a government, and there needs to be some overall better Constitutional Amendments on the definition of adults and their voting and contribution rights; expand the Civil Rights Act and get rid of Citizens United.
 
 
+12 # reiverpacific 2012-11-10 12:27
Well, I can't wait to read (if released) the twisted logic from on high by this crowd, especially Scalia and his echo-chamber lapdog Thomas.
May whatever powers that rule over us get some of them replaced in this coming term and restore a balance of progressive sanity.
 
 
+12 # Regina 2012-11-10 14:19
This is the next campaign, after Citizens United, that Roberts and his cohorts will conduct to undo laws that have benefited the
people of the United States. Those provisions embody the people's efforts to elect governments that serve them rather than privately vested interests. In turn, we see the prime long-term benefit of Obama's reelection, and the incoming Senate's composition, in that he may be called upon to name one or more new Justices during the coming four years, subject to the Senate's confirmation. I fervently hope we can succeed in enacting a constitutional amendment that would negate CU. I hope we won't need another amendment to preserve voting rights against yet another judicial travesty.
 
 
0 # whichLawIsJudeLaw 2012-11-15 01:17
I would definitely agree that Racism is alive in the South - but I wonder, at what point in the distant future do we no longer consider the south to be described "racist in the past"

Just curious what you guys think, I certainly think that SCOTUS will need to uphold the voting act - it would be really bad timing considering all the things that have been discussed recently about a more powerful minority group in America in regard to the election.
 

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