Discussion » Current Events » Japan Faces Prospect of Nuclear Catastrophe as Wor

  • A.w
    A.w wrote:

     

    TOKYO — Japan faced the likelihood of a catastrophic nuclear accident Tuesday morning, as an explosion at the most crippled of three reactors at the Fukushima Daiichi Nuclear Power Station damaged its crucial steel containment structure, emergency workers were withdrawn from the plant, and much larger emissions of radioactive materials appeared immiment, according to official statements and industry executives informed about the developments.

    Japanese Prime Minsiter Naoto Kan made a televised address to the nation at 11 a.m. Tokyo time to discuss the latest developments in the crisis.

    The sharp deterioration came after government officials said the containment structure of the No. 2 reactor, the most seriously damaged of three reactors at the Daichi plant, had suffered damage during an explosion shortly after 6 a.m. on Tuesday.

    They initially suggested that the damage was limited and that emergency operations aimed at cooling the nuclear fuel at three stricken reactors with seawater would continue. But industry executives said that in fact the situation had spiraled out of control and that all plant workers needed to leave the plant to avoid excessive exposure to radioactive leaks.

    If all workers do in fact leave the plant, the nuclear fuel in all three reactors is likely to melt down, which would lead to wholesale releases of radioactive material — by far the largest accident of its kind since the Chernobyl disaster 25 years ago.

    Reports of an imminent worsening of the problem came after a frantic day and night of rescue efforts focused largely on the No. 2 reactor. There, a malfunctioning valve prevented workers from manually venting the containment vessel to release pressure and allow fresh seawater to be injected into it. That meant that the extraordinary remedy emergency workers have been using to keep the nuclear fuel from overheating no longer worked.

    As a result, the nuclear fuel in that reactor was exposed for many hours, increasing the risk of a breach of the container vessel and a more dangerous emissions of radioactive particles.

    By Tuesday morning, the plant’s operator, Tokyo Electric Power, said it had fixed the valve and resumed seawater injections, but that they had detected possible leaks in the containment vessel that prevented water from fully covering the fuel rods.

    Then the explosion hit the same reactor. The operator initially reported that the blast may have damaged the bottom part of the container vessel, but later said radiation levels had not risen high enough to suggest a major escalation of the problem. While they did not immediately provide a detailed account of what happened at the reactor, government and company officials initially ruled out  a serious breach that could lead to massive radioactive leaks or a full meltdown of the nuclear fuel.

    Follow the NYTimes.....

    http://www.nytimes.com/2011/03/15/world/asia/15nuclear.html

  • Stine Ekren
    Stine Ekren wrote:

    @Ami, I guess u may be engaged as WLIB reporter of entertainment & News section~hh~

  • Jamie Wen
    Jamie Wen wrote:

    我国现有核电站4座:秦山、大亚湾、田湾、岭澳,再建和规划中的9座。在中长期布局中,广东、浙江、山东、江苏、辽宁、福建等沿海省份将是厂址的优选地点。到2020年,我国将新增投产2300万千瓦的核电。建核电站的政治歧见纷争和核辐射带来的政治困扰应是决策层的顾虑。

  • Stine Ekren
    Stine Ekren wrote:

    ok, Jamie, count u in~

  • Stine Ekren
    Stine Ekren wrote:

    absolutely! u contributed so much to  WLIB~hehe...

  • Da Fan
    Da Fan wrote:

    Decades ago, the US threw HUNDREDS of atomic bombs in Nevada, and dudes in Cali and Vegas were quite fine...the catasthrophy in Chernobyl is a level 7 accident, and people in Kiev were somewhat affected coz Kiev is too close to the site...the thing is, I just cannot understand why dudes in China are so worry about the radioactive matter would float to China and do significant harm to them.

    Seriously, do you know how much PURE Uranium is in the reactor? do you know how much pure Uranium an A bomb has? Do you aware of that the unit of the number you're worring about is "μSv", not "Sievert"? -- Come on, do you even know the definition and meaning of a Sievert?

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