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Originally posted by Aeons
The Insurer weighs in. The effected plants all have tsunami and earthquake exceptions. How nice.
insurancenewsnet.com...edit on 2011/3/15 by Aeons because: (no reason given)
Citing legal exclusions, Lloyd's insurer Chaucer Holdings plc does not expect its Nuclear Syndicate 1176 to suffer "any significant insured loss" as a result of the earthquake and tsunami that hit northeastern Japan on March 11.
The Japanese Nuclear Act of 1961, amended in 2009, stipulates that operators of nuclear power plants face no liability for "grave natural disaster of an exceptional nature."
Chaucer provides insurance to Tokyo Electric Power Co., which owns two of the three nuclear power plants in the area affected by the disaster. These plants are Fukushima Dai-ichi and Fukushima Daini. Chaucer said it has no business interruption or property polices in effect on the two facilities.
The company also provides property damage cover, with an earthquake and tsunami exclusion, for the third plant, Onagawa, which is owned by Tohuku Electric Power Co.
Originally posted by TheRedneck
reply to post by Hugues de Payens
Agreed, and good post.
Some of the suits do have a lead lining, but they are super-heavy and really do not have enough lead in them even at that weight to provide much shielding. The little bit they do provide might extend exposure time some, but they do not make a person impervious to radiation by any means.
Well, except in the movies. Somehow they seem to work better in front of a camera,
Originally posted by Vitchilo
Did I see a report saying that the Japanese government had declared some kind of censorship executive power earlier today? Article 15 of the constitution?
This spent fuel must be kept underwater to prevent severe releases of radioactivity, among other reasons. A meltdown or even a fire could occur if there is a loss of coolant from the spent fuel pool. The water in the spent fuel pool and the roof of the reactor building are the main barriers to release of radioactivity from the spent fuel pool.
Hydrogen is generated in a nuclear reactor if the fuel in the reactor loses its cover of cooling water. The tubes that contain the fuel pellets are made of a zirconium alloy. Zirconium reacts with steam to produce zirconium oxide and hydrogen gas. Moreover, the reaction is exothermic – that is, it releases a great deal of heat, and hence creates a positive feedback that aggravates the problem and raises the temperature. The same phenomenon can occur in a spent fuel pool in case of a loss of cooling water.
The Fukushima Daiichi plant has seven pools for spent fuel rods. Six of these are (or were) located at the top of six reactor buildings. One “common pool” is at ground level in a separate building. Each “reactor top” pool holds 3450 fuel rod assemblies. The common pool holds 6291 fuel rod assemblies. [The common pool has windows on one wall which were almost certainly destroyed by the tsunami.] Each assembly holds sixty-three fuel rods. This means the Fukushima Daiichi plant may contain over 600,000 spent fuel rods
Japanese commercial nuclear power plants began operation in 1970. Currently there are 53 nuclear power plants in operation. To date close to 20,000 tons of spent nuclear fuel has been generated by Japan's nuclear power program
The quantity of fission products (spent nuclear fuel) produced each year at a full-sized commercial nuclear power plants is massive. A total of approximately 50,000 times the fission products of the Hiroshima bomb are created by Japanese nuclear power plants each year, and this for the most part is cumulative, in other words the material remains radioactive. Most of this waste is being temporarily stored at nuclear power plant sites and must remain segregated from the natural environment
If a fire were to break out at the Millstone Reactor Unit 3 spent fuel pond in Connecticut, it would result in a three-fold increase in background exposures. This level triggers the NRC’s evacuation requirement, and could render about 29,000 square miles of land , according to Thompson. Connecticut covers only about 5,000 square miles; an accident at Millstone could severely affect Long Island and even New York City
A 1997 report for the NRC by Brookhaven National Laboratory also found that a severe pool fire could render about 188 square miles uninhabitable, cause as many as 28,000 cancer fatalities, and cost $59 billion in damage. (The Brookhaven study relied on a different standard of uninhabitability than Thompson.) While estimates vary, “the use of a little imagination,” says Thompson, “shows that a pool fire would be a regional and national disaster of historic proportions.”
Several events could cause a loss of pool water, including leakage, evaporation, siphoning, pumping, aircraft impact, earthquake, accidental or deliberate drop of a fuel transport cask, reactor failure, or an explosion inside or outside the pool building. Industry officials maintain that personnel would have sufficient time to provide an alternative cooling system before the spent fuel caught fire. But if the water level dropped to just a few feet above the spent fuel, the radiation doses in the pool building would be lethal.
The consequences of severe spent fuel pool accidents at closed U.S. reactors were studied by the Brookhaven National Laboratory in a 1997 report prepared for the U.S. Nuclear Regulatory Commission. According to the results, the damages resulting from such accidents for U.S. Boiling Water Reactors could range from $700 million to $546 billion, which would be between roughly $900 million and $700 billion in today’s dollars. The lower figures would apply if there were just one old spent fuel set present in the pool to a full pool in which the spent fuel has been re-racked to maximize storage. Other variables would be whether there was any freshly discharged spent fuel in the pool, which would greatly increase the radioactivity releases. The estimated latent cancer deaths over the years and decades following the accident was estimated at between 1,300 and 31,900 within 50 kilometers (30 miles) of the plant and between 1,900 and 138,000 within a radius of 500 kilometers (300 miles) from the plant.
The range of consequences in Japan would be somewhat different from those outlined in the Brookhaven report, since the consequences depend on population density within 50 and 500 kilometers of the plant, the re-racking policy, and several other variables. It should also be noted that Daiichi Unit 1 is about half the power rating of most U.S. reactors, so that the amount of radioactivity in the pool would be about half the typical amount, all other things being equal. But the Brookhaven study can be taken as a general indicator that the scale of the damage could be vast in the most severe case.
“That would be like Chernobyl on steroids,” said Arnie Gundersen, a nuclear engineer at Fairewinds Associates and a member of the public oversight panel for the Vermont Yankee nuclear plant, which is identical to the Fukushima Daiichi unit 1
The Tokaimura nuclear accident (東海村JCO臨界事故, Tōkai-mura JCO-rinkai-jiko?, "Tōkai Village JCO Criticality Accident") was at the time Japan's worst civilian nuclear radiation accident. It took place on 30 September 1999 at a uranium reprocessing facility located in the village of Tōkai, Naka District, Ibaraki. The accident occurred in a very small fuel preparation plant operated by JCO (formerly Japan Nuclear Fuel Conversion Co.), a subsidiary of Sumitomo Metal Mining Co
The Rokkasho Reprocessing Plant (六ヶ所村核燃料再処理施設, Rokkasho Kakunenryō Saishori Shisetsu?) is a nuclear reprocessing plant with an annual capacity of 800 tons of uranium or 8 tons of plutonium
Rokkasho-mura has the world largest cooling pool (Fig. 4). Spent nuclear fuel transported to the reprocessing plant is stored here and it is ultimately expected to hold 3000 tons of spent fuel
Other safety problems have plagued Rokkasho. Last year, the cooling system of its spent nuclear fuel storage pool temporarily failed. The ventilation system in the fuel storage building had problems. Last month, the fuel pool, which at that point contained more than 1,000 nuclear fuel assemblies, leaked coolant from a loose valve; it took workers more than 15 hours to identify and fix the problem
According to Dr. Jeffrey King, the chair of the Nuclear Science and Engineering program at the Colorado School of Mines, levels of radiation released during the first two explosions at the nuclear plant in Japan mirrored the amount you'd receive after a few chest X-rays.
The amount of radiation released on-site after the third explosion is the equivalent to 4,000 chest X-rays.
Several experts we spoke with say they believe, given the ever-changing nature of nuclear incidents, the ranking for the Fukushima incident will likely go up.
Originally posted by okiecowboy
reply to post by rancher1
I would really disagree with that report....it's kinda like apples and oranges really...Chernobyl reactor melted down..1 reactor..and graphite burned...but no spent fuel
how many reactors we talking in japan? in japan someone had the great idea of sticking spent fuel above the reactor
Heck in Chernobyl....there is only 21,900 fuel rods that have to be stored....in japan we are talking about 400k or more...
I don't know enough about the subject to say either way,, But i can tell you this she is a well respected leader in the energy world, I would think twice before I trying to dispute her, Just Email her at the link she will respond she is cool like Redneck..
Originally posted by EnhancedInterrogator
reply to post by Count Chocula
That would certainly have a more predictable out-come (i.e. everybody dies).
Not to mention Toyota and Honda parts raining down all over the world.
Originally posted by crazydaisy
This article just came across the wires - thought it would make me
feel better but after reading I find it more concerning than before.
With regard to the Fukushima Nuclear Power Plants, Prime Minister Kan went to TEPCO to figure out the current situation again, and some new developments that I did not have during my last press conference came to light. I would like to report on these as soon as possible to the people of Japan.
In the Unit 2 reactor at the Fukushima Daiichi Nuclear Power Station, damage has been observed to the suppression pool, a slightly protruding section connected to containment vessel that condenses water vapor into liquid water. However, the readings of radiation levels in the surrounding area have shown no sudden rise, and are not at values that would represent a threat to the people's health.
All the same, we intend to take swift action in response to this situation. As I need to take orders from the Prime Minister at TEPCO, I need to leave you soon. If you have just one or two questions, please go ahead.