Jump to content
  • Member Statistics

    17,519
    Total Members
    7,904
    Most Online
    bowsunski
    Newest Member
    bowsunski
    Joined

Japan Nuclear Crisis Part III


Recommended Posts

More specifics -

http://www3.nhk.or.jp/daily/english/08_20.html

Thursday's quake damages Onagawa nuclear plant

Tohoku Electric Power Company says Thursday night's strong earthquake caused water to overflow from spent fuel storage pools at one of its nuclear power plants.

The power company reported on Friday that water had spilled onto the floor at all 3 reactors at the Onagawa nuclear power plant in Miyagi Prefecture. The amount of water spilled was 3.8 liters at the most.

The utility firm also found water leaks at 5 locations in the plant, including inside buildings housing the reactors.

The company added that blowout panels--devices designed to control pressure inside the buildings--were damaged at the turbine building of the Number 3 reactor.

The newly reported problems add to the downing of 3 of 4 external power lines at the Onagawa plant. The plant is maintaining its cooling capabilities with the remaining power line.

Tohoku Electric Power Company is continuing its efforts to determine the extent of the damage caused by the latest quake. But it says no change has yet been seen in radiation levels around the plant.

Link to comment
Share on other sites

  • Replies 770
  • Created
  • Last Reply

The possibility raised new questions. The Nuclear Regulator Commission said that its speculation about the flow of core material out of the reactor vessel would explain high radiation readings in an area underneath, called the drywell.

But some of the radiation readings at Reactors Nos. 1 and 3 over the last week were nearly as high as or higher than the 3,300 rems per hour that the commission said it was trying to explain, so it would appear that the speculation would apply to them as well. At No. 2, extremely radioactive material continues to ooze out of the reactor pressure vessel, and the leak is likely to widen with time, a western nuclear executive asserted.

“It’s a little like pulling a thread out of your tie,” said the executive, who spoke on the condition of anonymity to protect business connections in Japan. “Any breach gets bigger.”

Flashes of extremely intense radioactivity have become a serious problem, he said. Tokyo Electric’s difficulties in providing accurate information on radiation are not a result of software problems, as some Japanese officials have suggested, but stem from damage to measurement instruments caused by radiation, the executive said.

Broken pieces of fuel rods have been found outside of Reactor No. 2, and are now being covered with bulldozers, he said. The pieces may be from rods in the spent-fuel pools that were flung out by hydrogen explosions.

http://www.nytimes.com/2011/04/08/world/asia/08japan.html?_r=2&hp

Link to comment
Share on other sites

I think there is a lot going on in Japan that is being covered up with bull.

I suspect that's quite common over there. Saving face appears to be conditioned by the culture. I think the Japanese excel in many, many ways... but I also think there is sometimes a tendency (in America at least) to over-inflate their abilities and character. Sometimes they can be just as incompetent as the rest of us, so maybe it's unfair to judge them by a higher standard.

Of course there may be some instances where not revealing the fullness of truth (heh) may be justified for the common good. This is not necessarily one of those instances.

Link to comment
Share on other sites

Hmmm... this should be interesting to see because I've had serious doubts about the 14m tsunami claim.

Tokyo (CNN) -- A brief video clip released Saturday captures the massive tsunami that crippled Japan's Fukushima Daiichi power plant, showing the wall of water that slammed into the facility and created an ongoing crisis.

The video shows the giant wave generated by the historic March 11 earthquake crashing over the plant's seawall and engulfing the facility, with one sheet of spray rising higher than the buildings that house the plant's six reactors. Tokyo Electric Power, the plant's owner, told reporters the wall of water was likely 14 to 15 meters (45 to 48 feet) higher than normal sea levels -- easily overwhelming the plant's 5-meter seawall.

http://www.cnn.com/2...dex.html?hpt=T2

Link to comment
Share on other sites

New R7.1 quake. Power to FUBAR reactors 1, 2 and 3 still cut; more evacs and radiation increasing (again). Give the OK signal for locals; no radiation or debris fields to worry about worldwide or even the West Coast. "Relax. Have a cigar. Put your feet up. ..................OK, break's over"

==============

http://www.google.com/hostednews/afp/article/ALeqM5iLZVPkEizQJRVXAlq-l95B2ZBdFg?docId=CNG.20d623178627015535a7244f805472ca.171

New 7.1 Quake Hts Japan as Evacuation Zone Widens

By Hiroshi Hiyama (AFP) – 1 hour ago

TOKYO — Japan on Monday widened the evacuation zone around a stricken nuclear plant exactly a month on from a huge natural disaster as another 7.1 magnitude quake and tsunami alert strained nerves anew.

The latest aftershock caused buildings to sway in the capital Tokyo, shortly after the nation had observed a minute's silence to remember the 13,000 people killed in the March 11 disaster and the 15,000 who officially remain missing.

The US Geological Survey said the 7.1 onshore quake hit at 5:16 pm (0816 GMT) at a depth of just 13 kilometres (eight miles). Its epicentre was 81 kilometres south of Fukushima city, near the troubled nuclear plant.

Japan's meteorological agency warned that a one-metre (three foot) wave could hit Ibaraki prefecture, one of the areas pummelled by last month's massive tsunami, before cancelling the alert less than an hour later.

Another tremor of 7.1 on April 7 -- just one of thousands of aftershocks to hit the traumatised country -- killed at least two people and cut electricity across a huge area of northern Japan.

Workers battling to contain the crisis at the Fukushima-Daiichi nuclear plant were evacuated after the latest quake Monday, which briefly knocked out power to crippled reactors before electricity was restored.

People across the country had paused at 2:46 pm, the moment Japan's biggest ever recorded earthquake struck, setting off a chain of events that has left workers scrambling to tame runaway atomic reactors at the Fukushima plant.

It was the worst tragedy to envelop the country since World War II.

Prime Minister Naoto Kan promised Sunday he would "never abandon" tsunami survivors as he tried to focus attention on the future, despite the continuing high-stakes battle at the nuclear plant.

Kan, on only his second trip to the disaster zone in the month since the tragedy, said the government would "work as fast as possible" to house the more than 150,000 people still living in emergency shelters.

Underlining the threat of long-term health damage from radiation, the government on Monday said it was to widen the evacuation area around the atomic plant to include some towns outside the current 20-kilometre exclusion zone.......................>MORE:

http://www.google.com/hostednews/afp/article/ALeqM5iLZVPkEizQJRVXAlq-l95B2ZBdFg?docId=CNG.20d623178627015535a7244f805472ca.171

Link to comment
Share on other sites

Interesting video on CNN.com , Naomi Toyda went into one of the abandoned towns, filmed and brought Geiger counter, way over limits.

The Nuclear Safety Commission of Japan released a preliminary calculation Monday saying that the crippled Fukushima Daiichi nuclear plant had been releasing up to 10,000 terabecquerels of radioactive materials per hour at some point after a massive quake and tsunami hit northeastern Japan on March 11.

The disclosure prompted the government to consider raising the accident's severity level to 7, the worst on an international scale, from the current 5, government sources said. The level 7 on the International Nuclear Event Scale has only been applied to the 1986 Chernobyl catastrophe.

The current provisional evaluation of 5 is at the same level as the Three Mile Island accident in the United States in 1979.

According to an evaluation by the INES, level 7 accidents correspond with a release into the external environment radioactive materials equal to more than tens of thousands terabecquerels of radioactive iodine 131. One terabecquerel equals 1 trillion becquerels.

Haruki Madarame, chairman of the commission, which is a government panel, said it has estimated that the release of 10,000 terabecquerels of radioactive materials per hour continued for several hours.

The commission says the release has since come down to under 1 terabecquerel per hour and said that it is still examining the total amount of radioactive materials released.

The commission also released a preliminary calculation for the cumulative amount of external exposure to radiation, saying it exceeded the yearly limit of 1 millisieverts in areas extending more than 60 kilometers to the northwest of the plant and about 40 km to the south-southwest of the plant.

It encompasses the cities of Fukushima, Date, Soma, Minamisoma, and Iwaki, which are all in Fukushima Prefecture, and some areas including the town of Hirono in the prefecture.

Within a 20-km exclusion zone set by the government, the amount varied from under 1 millisieverts to 100 millisieverts or more, and in the 20-30 km radius ring where residents are asked to stay indoors, it came to under 50 millisieverts. The commission used the System for Prediction of Environmental Emergency Dose Information to calculate the spread of radiation.

<BR clear=all>http://english.kyodonews.jp/news/2011/04/84721.html

Link to comment
Share on other sites

REUTERSFLASH ReutersBreakingNews Earthquake off coast off Honshu, Japan, measured at 6.6 magnitude - USGS

Revised up to a 6.6

  • NEWS ADVISORY: Parts of Tohoku, Tokai shinkansen lines suspended after quakes (08:38)
  • NEWS ADVISORY: Services on all parts of Joetsu, Nagano shinkansen lines halted after quakes (08:37)
  • NEWS ADVISORY: Fire breaks out at Fukushima nuclear plant, soon extinguished (08:37)
  • NEWS ADVISORY: Narita airport runways closed for checks in wake of quake that jolted Chiba Pref. (08:24)
  • The above are flashes from Kyoodo
Link to comment
Share on other sites

The Nuclear Safety Commission of Japan released a preliminary calculation Monday saying that the crippled Fukushima Daiichi nuclear plant had been releasing up to 10,000 terabecquerels of radioactive materials per hour at some point after a massive quake and tsunami hit northeastern Japan on March 11.

The disclosure prompted the government to consider raising the accident's severity level to 7, the worst on an international scale, from the current 5, government sources said. The level 7 on the International Nuclear Event Scale has only been applied to the 1986 Chernobyl catastrophe.

The current provisional evaluation of 5 is at the same level as the Three Mile Island accident in the United States in 1979.

According to an evaluation by the INES, level 7 accidents correspond with a release into the external environment radioactive materials equal to more than tens of thousands terabecquerels of radioactive iodine 131. One terabecquerel equals 1 trillion becquerels.

Haruki Madarame, chairman of the commission, which is a government panel, said it has estimated that the release of 10,000 terabecquerels of radioactive materials per hour continued for several hours.

The commission says the release has since come down to under 1 terabecquerel per hour and said that it is still examining the total amount of radioactive materials released.

The commission also released a preliminary calculation for the cumulative amount of external exposure to radiation, saying it exceeded the yearly limit of 1 millisieverts in areas extending more than 60 kilometers to the northwest of the plant and about 40 km to the south-southwest of the plant.

It encompasses the cities of Fukushima, Date, Soma, Minamisoma, and Iwaki, which are all in Fukushima Prefecture, and some areas including the town of Hirono in the prefecture.

Within a 20-km exclusion zone set by the government, the amount varied from under 1 millisieverts to 100 millisieverts or more, and in the 20-30 km radius ring where residents are asked to stay indoors, it came to under 50 millisieverts. The commission used the System for Prediction of Environmental Emergency Dose Information to calculate the spread of radiation.

<BR clear=all>http://english.kyodo...1/04/84721.html

What this is now on the scale of Chernobyl. I'am skeptical it's bad but not that bad. Hopefully it is effecting towns already destroyed beyond repair by the Tsunami anyway.

Link to comment
Share on other sites

What this is now on the scale of Chernobyl. I'am skeptical it's bad but not that bad. Hopefully it is effecting towns already destroyed beyond repair by the Tsunami anyway.

A few things...

Towns being destroyed by a tsunami can be rebuilt. Radiation remaining in an area will limit future development.

This may not have had the same type of single event as Chernobyl, but in this case there are 4 reactors with problems and the cumulative effect is what matters.

Link to comment
Share on other sites

A few things...

Towns being destroyed by a tsunami can be rebuilt. Radiation remaining in an area will limit future development.

This may not have had the same type of single event as Chernobyl, but in this case there are 4 reactors with problems and the cumulative effect is what matters.

Scince they are starting over from scratch it is easy to just build a town anywhere. Not so easy when you have possessions, friends family and employment tying you to that town.

Link to comment
Share on other sites

Scince they are starting over from scratch it is easy to just build a town anywhere. Not so easy when you have possessions, friends family and employment tying you to that town.

The tsunami didn't travel 30km inland. Water and debris made it no more than 10km and in most places much less than that. The wave that destroyed things near the coast isn't doing the same damage 10 km inland as it would be much less in height and strength, which in turn would spare many communities away from the coast of complete destruction. Additionally, the square km area that has both nuclear and tsunami problems is absolutely dwarfed by the square km dealing with just the nuclear plant issue.

Link to comment
Share on other sites

Very grim news:

(Reuters) - The operator of Japan's crippled Fukushima Daiichi nuclear power plant said on Tuesday that they are concerned that the radiation leakage could eventually exceed that of the 1986 Chernobyl nuclear disaster.

"The radiation leak has not stopped completely and our concern is that it could eventually exceed Chernobyl," an official from operator Tokyo Electric and Power told reporters on Tuesday.

Japan on Tuesday raised the severity of its nuclear crisis at the Fukushima Daiichi nuclear plant to a level 7 from 5, putting it on par with the Chernobyl nuclear disaster in 1986.

The emission of radioactive substances from the Daiichi plant is about 10 percent of the amount that had been detected at Chernobyl, Japan's nuclear safety agency said earlier on Tuesday. (Reporting by Shinichi Saoshiro, editing by Jonathan Thatcher)

http://www.reuters.com/article/2011/04/12/japan-nuclear-radiation-idUSTKE00635920110412

Link to comment
Share on other sites

Some of the readers' comments in a Wall Street Journal article about this situation are absolutely insane and baffling:

has anyone noticed an increase in nose bleeds in the states? I live in the mountains of Ny and alot of people have been having nose bleeds in the last 2 weeks
Seeing that they have 10 TIMES the radioactive material that Chernobyl had it actually rates a TEN on the scale to seven.
This is going to surpass Chernobyl by a long shot. Once the personel start getting very sick from working at containing the disaster, you wont get any one to go near the place. Each of these reactors will start to go back into fission reactions (if they haven't already). Then its good night nurse.
soon we will hear about exploded reactors and most likely Tokyo will become a ghost city

http://www.marketwatch.com/story/japan-may-assess-nuclear-crisis-at-chernobyl-level-2011-04-11

Link to comment
Share on other sites

The tsunami didn't travel 30km inland. Water and debris made it no more than 10km and in most places much less than that. The wave that destroyed things near the coast isn't doing the same damage 10 km inland as it would be much less in height and strength, which in turn would spare many communities away from the coast of complete destruction. Additionally, the square km area that has both nuclear and tsunami problems is absolutely dwarfed by the square km dealing with just the nuclear plant issue.

I was just trying to be optomistic, I agree there isn't much to be optomstic about from this situation though.

Link to comment
Share on other sites

Some of the readers' comments in a Wall Street Journal article about this situation are absolutely insane and baffling:

http://www.marketwat...evel-2011-04-11

Hey, i got a nosebleed the other day! AHH! haha jk jk.

That video with the experiment is a pretty scary. Almost like a frying pan,if you put it under water after being used, it'll bend,deform,crack and lose it's coating. repeat the process and it will shatter.

Seems like the inability to keep some of the reactors a constant cool has really done some damage to the fuel rods/fuel rod casings.

From CNN:

http://www.cnn.com/2011/WORLD/asiapcf/04/11/japan.nuclear.reactors/index.html?hpt=T1&iref=BN1

"The amount of radioactive Cesium-137, which has a half-life of 30 years, is about one-seventh the amount released at Chernobyl, according to the agency"

"Hidehiko Nishiyama, the safety agency's chief spokesman, explained the final level won't be set until the disaster is over and a more detailed investigation has been conducted"

"Instead, "if there are areas in the northwestern parts where there is a risk of exceeding 20 millisieverts as a cumulative dose over a one-year period, the area will be designated an evacuation area even if it is beyond the 30-kilometer area," Shinano told reporters Monday night."

"That dose is a tiny fraction of what would cause immediate radiation sickness, but it's more than seven times the amount a typical resident of a western industrialized country receives from background sources in a year. Long-term exposures to those levels of radiation could increase the risk of cancer -- and the presence of cesium isotopes that have half-lives of up to 30 years means that radioactivity could linger for some time."

"Japanese authorities attributed growing concentrations of cesium-134, with a two-year half-life, and cesium-137, which loses half its radioactivity over 30 years, to the decay of larger concentrations of iodine-131, which has a half-life of eight days"

Overall, a very informative article that isn't overly alarming, but isn't downplaying the scenario either.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...