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Thread: State of emergency declared at Japan Nuclear Plant

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    Re: State of emergency declared at Japan Nuclear Plant

    Excerpted from “Second nuclear meltdown likely under way in Japan, official says,” NBC, msnbc.com and news services, updated 2 minutes ago
    A partial meltdown is likely under way at second quake-stricken nuclear reactor, Japan's top government spokesman said Sunday.

    Fuel rods were briefly exposed and radiation levels briefly rose above the legal limit at the nuclear plant where both reactors are located, said Chief Cabinet Secretary Yukio Edano.

    His statement came after Japan's largest electric utility started releasing steam Sunday at one quake-crippled nuclear reactor while trying to stop a meltdown that began a day earlier in another. …
    Joseph Cirincione reported on Saturday's edition of the NBC Nightly News that a third reactor at Fukushima Daiichi may also have experienced a backup coolant failure. In effect all three operating reactors at the facility are failing.
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    Re: State of emergency declared at Japan Nuclear Plant

    According to CNN, Japan is now operating on the presumption that two core meltdowns are underway, and cooling system of a third reactor has failed. Dear lord.
    Last edited by DiAnna; 03-13-11 at 12:07 AM.

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    Re: State of emergency declared at Japan Nuclear Plant

    Quote Originally Posted by DiAnna View Post
    According to CNN, Japan is now operating on the presumption that two core meltdowns are underway, and cooling system of a third reactor has failed. Dear lord.
    Story here:

    Japanese nuclear plants' operator scrambles to avert meltdowns

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    Re: State of emergency declared at Japan Nuclear Plant

    Quote Originally Posted by danarhea View Post
    States of emergency have been declared at FIVE nuclear power plants now. This is serious as hell. Has anybody seen what these nuke plants look like? Let me show you one:



    Notice something? No containment dome. They look just like the ones at Chernobyl. This could be a disaster which could be unparalleled by any other in history. I pray to God that Japan does not end up going through another Hiroshima or Nagasaki. There won't be explosions if any of these plants melts down, but the radiation and fallout will be there, nonetheless.

    The irony contained within the possibilities here staggers the imagination. Let us all pray that a meltdown does not happen.
    All newer nuclear power plants have this new design. Let's all pray that they can get a handle on this.

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    Re: State of emergency declared at Japan Nuclear Plant

    Holy crap...how bad is this going to get? It seems every hour or so, they revise their story to something worse...

    What will the multiple meltdowns mean in terms of radiation release, and potential damage?
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    Re: State of emergency declared at Japan Nuclear Plant

    Quote Originally Posted by repeter View Post
    Holy crap...how bad is this going to get? It seems every hour or so, they revise their story to something worse...

    What will the multiple meltdowns mean in terms of radiation release, and potential damage?
    I'm not an expert, but I would expect that any radioactive material would spread outward, but more towards the prevailing winds. IF however, the radioactive particles get into the jet stream, well... then there's going to be radioactivity spread around the world.

    Regardless, the biggest threats are the areas nearest these nuclear power plants.

    Not to make light of the seriousness of this event, because there's already hundreds or thousands of people dead on top of this, but can we REALLY count nuclear as a 'clean energy' in light of SEVERAL meltdowns?

    The Japanese government has not been very forthcoming in this situation, how bad does it have to get?? I hope that people are being given the iodine treatment... I mean, you can live without your teeth or hair, but if you lose the lymph nodes to radiation damage, you can't survive that.

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    Re: State of emergency declared at Japan Nuclear Plant

    Reactor Containment Breached!


    As the crisis continues with Japan’s Fukushima Daiichi nuclear power plant, a variety of STRATFOR nuclear science and engineering sources said Japanese government statements that the troubled Unit 1 reactor container has not been breached are highly dubious. Reports of iodine and cesium outside of the plant indicate that the reactor’s containment structure has been breached.

    Iodine is in the fuel pins and cesium is a particulate, meaning there are heavy particles in the air, which are basically radioactive dust. Cesium 137, which Yomiuri Shimbun reports has been discovered in the surrounding area, is probably a product of the nuclear fission process and a strong demonstration of severe damage to the nuclear reactor’s core. The fact that the government has prepared a series of iodine treatments for locals in the vicinity of the nuclear plants suggests it is anticipating the need to prevent iodine exposure.

    Meanwhile 90 people were reported as possibly exposed to radiation, including 30 refugees from the area and 60 people on staff at Futaba hospital
    CONTINUED: Free Article for Non-Members | STRATFOR
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    Re: State of emergency declared at Japan Nuclear Plant

    Quote Originally Posted by Big Tom View Post
    All newer nuclear power plants have this new design. Let's all pray that they can get a handle on this.
    The secondary containment structure does not have to be dome shaped. It has to be proven to sustain a defined overpressure, the value of which is some figure like 15 psid or so. While flat walls are less efficient at carrying this distributed load than a spherical dome, it's not impossible, either.

    However, given that explosion the first day, it's unlikely their containments survived anyway. I read where they're pumping seawater in to cool things down. Good luck with that. Before earthquake those tea kettles were operating at 95% power or greater, that's how commerical reactors are run, and it will have most likely have been running long enough to have achieved a steady state balance between fission product poisons and rod height.. The post-shut down fission product decay is going to be generating significant amounts of heat for WEEKS, and it will take at least two months before the heat generation will slow down to a safe level.

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    Re: State of emergency declared at Japan Nuclear Plant

    Quote Originally Posted by Mayor Snorkum View Post
    The secondary containment structure does not have to be dome shaped. It has to be proven to sustain a defined overpressure, the value of which is some figure like 15 psid or so. While flat walls are less efficient at carrying this distributed load than a spherical dome, it's not impossible, either.

    However, given that explosion the first day, it's unlikely their containments survived anyway. I read where they're pumping seawater in to cool things down. Good luck with that. Before earthquake those tea kettles were operating at 95% power or greater, that's how commerical reactors are run, and it will have most likely have been running long enough to have achieved a steady state balance between fission product poisons and rod height.. The post-shut down fission product decay is going to be generating significant amounts of heat for WEEKS, and it will take at least two months before the heat generation will slow down to a safe level.
    They better start pouring some ice cubes in there!
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    Re: State of emergency declared at Japan Nuclear Plant

    Quote Originally Posted by BmanMcfly View Post
    Not to make light of the seriousness of this event, because there's already hundreds or thousands of people dead on top of this, but can we REALLY count nuclear as a 'clean energy' in light of SEVERAL meltdowns?
    Yes, of course.

    TMI 1 was due to operator error, Chernobyl was due to poor and obsolete design compounded by the financial decay associated with a socialist state, and it's safe to say that the Fukushima reactor design parameters did not include consideration of a trench-ripping axis-shifting, island shoving earthquake. Someone said those facilities were built in the 70's?

    What's needed to for melt-down free reactors:

    1) Air cooling so loss of coolant accidents are impossible.

    2) Naturally convective, so loss of flow accidents are unlikely.

    3) Low power density cores, so meltdowns are physically impossible.

    Shut reactor designs do exist today. But no one is going to scrap existing power plants to build new pebble-bed air cooled reactors. As always, the money counts.

    However, Mayor Snorkum believes completely in the ability of the anti-progress environmentalists to beat the drum you're tapping to death.

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