It looks like you're using an Ad Blocker.
Please white-list or disable AboveTopSecret.com in your ad-blocking tool.
Some features of ATS will be disabled while you continue to use an ad-blocker.
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 uninhabitable , 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.”
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
If that fuel were exposed to air and steam, the zirconium cladding would react exothermically, catching fire at about 1,000 degrees Celsius. A fuel pond building would probably not survive, and the fire would likely spread to nearby pools. The Nuclear Regulatory Commission (NRC) concedes that such a fire cannot be extinguished; it could rage for days
On average, spent fuel ponds hold five to 10 times more long-lived radioactivity than a reactor core. Particularly worrisome is the large amount of cesium 137 in fuel ponds, which contain anywhere from 20 to 50 million curies of this dangerous isotope. With a half-life of 30 years, cesium 137 gives off highly penetrating radiation and is absorbed in the food chain as if it were potassium. According to the NRC, as much as 100 percent of a pool’s cesium 137 would be released into the environment in a fire.
In comparison, the 1986 Chernobyl accident released about 40 percent of the reactor core's 6 million curies. A 1997 report for the Nuclear Regulatory Commission (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. A single spent fuel pond holds more cesium-137 than was deposited by all atmospheric nuclear weapons tests in the Northern Hemisphere combined.
The photo from NASA's Aqua satellite was taken at 2:46 p.m. Local Japan Time and shows a dark plume of smoke emanating from the Sendai region. The black smoke can be seen blowing far out to sea.
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
# 0510: Japan's worsening nuclear crisis will now be compared to the Chernobyl disaster, an editorial in Japan's Asahi Shimbun says. It adds that the unprecedented disaster will test the resilience of Japanese society.
A nation in the grip of nuclear panic: Japan disaster spirals out of control amid warnings it could end in 'apocalypse'...
Read more: www.dailymail.co.uk... l#ixzz1GkKTV95J
Also The Emperor of Japan has just been on live TV to say that he prays for the safety of as many of his people as possible ( sky news live tv banner)
Japan was consumed by panic last night as the nuclear crisis threatened to spiral out of control.
Fears of 'an apocalypse' were raised as radiation levels soared - and experts warned the crippled Fukushima plant had become a nuclear risk second only to the Chernobyl disaster.
Read more: www.dailymail.co.uk... l#ixzz1GkKdIxNf
# a cosmic cataclysm in which God destroys the ruling powers of evil
# Revelation: the last book of the New Testament; contains visionary descriptions of heaven and of conflicts between good and evil and of the end of the world; attributed to Saint John the Apostle
Originally posted by meathed
reply to post by tarifa37
Do you know where the Emperor is hiding out?
If he is hiding in a bunker or in another country then the worst WILL unfold.
I havent seen what the emperor was wearing, however I have noticed that every other japanese government ministers that have been at a press conferance, have been wearing a BLUE JUMPSUIT
Did anyone else notice that?
In addition to the reactor cores, the storage pool for highly radioactive irradiated nuclear fuel is also at risk. The pool cooling water must be continuously circulated. Without circulation, the still thermally hot irradiated nuclear fuel in the storage pools will begin to boil off the cooling water. Within a day or two, the pool’s water could completely boil away. Without cooling water, the irradiated nuclear fuel could spontaneously combust in an exothermic reaction. Since the storage pools are not located within containment, a catastrophic radioactivity release to the environment could occur. Up to 100 percent of the volatile radioactive Cesium-137 content of the pools could go up in flames and smoke, to blow downwind over large distances. Given the large quantity of irradiated nuclear fuel in the pool, the radioactivity release could be worse than the Chernobyl nuclear reactor catastrophe of 25 years ago.” Kamps is a specialist in nuclear waste at Beyond Nuclear and conducted research last year assessing the state of nuclear facilities in Japan.
The spent fuel rod pool at reactor 4 is one of seven pools for spent fuel rods at Fukushima Daichii. These pools are designed to store the intensively radioactive fuel rods that were already used in nuclear reactors. These “used” fuel rods still contain uranium (or in the case of fuel rods from reactor 3, they contain both uranium and plutonium from the MOX fuel used in that reactor). In addition to the uranium and plutonium, the rods also contain other radioactive elements. These radioactive elements are created in the rods by the intense radiation around the rods when they are in the reactor core (before they are moved to the spent fuel pools).
Six of the spent fuel rod pools 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 up to 3450 fuel rod assemblies. The common pool holds up to 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. The fuel rods once stored atop reactor 3 may no longer be there: one of the several explosions at the Fukushima reactors may have damaged that pool.
It never ends. Disasters will happen again and again until either they kill you or you die of natural or unnatural causes. I wouldn't worry about the jet stream. It's unlikely to impact us, but even if it does you can't spend your life running from the boogieman. The reality is that what's happening today will happen again in the not too distant future. Everything has momentum. Everything is conserved. Change is slow and painful. So if you're going to be running now you'll be running for the rest of your life. If you want to live your life, then do it now. If this event turns truly horrible and it turns out that it'll impact us in a big way, then I agree, it's time to leave. But until then live your life, don't panic.
Originally posted by morder1
Wow that Jet stream is nuts!! Should we be worried if we are in that area???
This whole incident is really wild... wonder what will be the end of it
Originally posted by originunknown
good yet frightening post.
ive heard on five live that they are going to try and douse the fires by helicopter. this seems like their playing their last cards now.