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NHK World: Crack Near #2 Reactor Has Stopped Leaking Radioactive Water into Ocean

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  • NHK World: Crack Near #2 Reactor Has Stopped Leaking Radioactive Water into Ocean

    NHK World: TEPCO confirmed that a crack in pit outside of the #2 reactor is allowing contaminated water to leak into ocean. Unsure if this is the only source of radiation into the sea. Crack to be filled with concrete.
    http://www3.nhk.or.jp/daily/english/02_21.html

  • #2
    Re: NHK World: Crack Near Reactor #2 Leaking Into Ocean

    NHK World reports that twice the legal standard of iodine-131 was detected 40km offshore, but not a threat to human health.
    http://www3.nhk.or.jp/daily/english/02_17.html

    Comment


    • #3
      Re: NHK World: Crack Near Reactor #2 Leaking Into Ocean

      IAEA has a slideshow on the seawater contamination levels:

      http://www.slideshare.net/iaea/pres-...ne-brief010411
      Twitter: @RonanKelly13
      The views expressed are mine alone and do not represent the views of my employer or any other person or organization.

      Comment


      • #4
        Re: NHK World: Crack Near Reactor #2 Leaking Into Ocean

        Press Release (Apr 02,2011)
        Out flow of fluid containing radioactive materials to the ocean from areas near intake channel of Fukushima Daiichi Nuclear Power Station Unit 2


        Today at around 9:30 am, we detected water containing radiation dose over
        1,000 mSv/h in the pit* where supply cables are stored near the intake
        channel of Unit 2. Furthermore, there was a crack about 20 cm on the
        concrete lateral of the pit, from where the water in the pit was out
        flowing. At around 12:20 pm, we reaffirmed the event at the scene.
        We have implemented sampling of the water in the pit, together with the
        seawater in front of the bar screen near the pit. These samples were sent
        to Fukushima Daini Nuclear Power Station for analysis.
        In addition to seawater sampling conducted in the coastal areas of
        Fukushima Daiichi/Daini Nuclear Power Station (sampling conducted at 4
        points), we have initiated additional seawater sampling at 3 points in the
        areas 15 km offshore from the relevant power stations. Taking into account
        the result of these monitoring, we are intending to conduct a
        comprehensive assessment.
        Currently, we are preparing to block up the leakage by injecting concrete
        to the crack. Moreover, we will investigate the influx route of
        contaminated water in the pit and implement necessary measures to prevent
        such influx.

        *pit: a shaft made of concrete


        Appendices
        Appendix1:Unit 2:Outline drawing of the out flow to ocean near discharge
        channel(PDF 10.8KB) http://www.tepco.co.jp/en/press/corp...s/110402e1.pdf
        Appendix2:Plan for sampling and radiation measuring of seawater offshore
        (PDF 12.7KB) http://www.tepco.co.jp/en/press/corp...s/110402e2.pdf
        Appendix3:Points for sampling and radiation measuring of seawater
        offshore(PDF 48.2KB) http://www.tepco.co.jp/en/press/corp...s/110402e3.pdf

        http://www.tepco.co.jp/en/press/corp...1040203-e.html
        Twitter: @RonanKelly13
        The views expressed are mine alone and do not represent the views of my employer or any other person or organization.

        Comment


        • #5
          Re: NHK World: Crack Near Reactor #2 Leaking Into Ocean

          Sunday, April 3, 2011

          Tepco dumps concrete to plug radiation leak at No. 2

          Sea contamination traced to cracked storage pit connected to reactor

          By MASAMI ITO and MINORU MATSUTANI
          Staff writers

          Tokyo Electric Power Co. said Saturday that a cracked storage pit at the Fukushima No. 1 power plant was the source of a radioactive water leak contaminating the ocean and that it is attempting to fill it with concrete.

          Holed up: A worker at the Fukushima No. 1 nuclear plant points to a cracked storage pit from which highly radioactive water was found leaking Saturday. KYODO PHOTO
          According to the utility and the Nuclear and Industrial Safety Agency, the square, concrete-covered pit is situated near an intake used to pump seawater into reactor No. 2.

          Although the pit is small, it contains highly contaminated water with a radioactivity exceeding 1,000 millisieverts per hour that is leaking into the ocean from a 20-cm crack, Tepco said.

          More...
          http://search.japantimes.co.jp/cgi-b...0110403a1.html
          "Safety and security don't just happen, they are the result of collective consensus and public investment. We owe our children, the most vulnerable citizens in our society, a life free of violence and fear."
          -Nelson Mandela

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          • #6
            Re: NHK World: Crack Near Reactor #2 Leaking Into Ocean

            Press Release (Apr 03,2011)
            Plant Status of Fukushima Daiichi Nuclear Power Station (as of 6:00 PM, April 3)

            ...

            Today at around 9:30 am, we detected water containing radiation dose overc
            1,000 mSv/h in the pit* where supply cables are stored near the intake
            channel of Unit 2. Furthermore, there was a crack about 20 cm on the
            concrete lateral of the pit, from where the water in the pit was out
            flowing.(We already informed.) During the same day, we injected fresh
            concrete to the pit, but we could not observe a reduction in the amount
            of water spilling from the pit to the sea.
            Therefore, we considered that a new method of stopping the water and
            determined to use the polymer. Necessary equipment and experts of water
            shutoff will be dispatched to the site and after checking the condition,
            we're doing continuous work to stop water by injecting polymer(April 3rd).

            ...

            http://www.tepco.co.jp/en/press/corp...1040307-e.html
            Twitter: @RonanKelly13
            The views expressed are mine alone and do not represent the views of my employer or any other person or organization.

            Comment


            • #7
              Re: NHK World: Unknown How Radiation is Entering into Ocean

              According to NHK World, TEPCO used a white dye in an attempt to locate the source of ocean radiation near reactor #2. TEPCO has of yet to find the source of the leak and thinks it may be elsewhere.
              http://www3.nhk.or.jp/daily/english/04_21.html

              Comment


              • #8
                Re: NHK World: Crack Near #2 Reactor Leaking Radioactive Water into Ocean

                NHK World reports that another attempt by TEPCO has now confirmed one source of radioactive water into the ocean is the #2 reactor. TEPCO has yet to contain the leak; efforts continuing.
                http://www3.nhk.or.jp/daily/english/05_18.html
                http://www3.nhk.or.jp/daily/english/05_32.html

                Comment


                • #9
                  Re: NHK World: Crack Near #2 Reactor Has Stopped Leaking Radioactive Water into Ocean

                  NHK World reporting that the efforts to stop the leaking of radiation from the pit near the #2 reactor has been successful, but may not be the only leak.
                  http://www3.nhk.or.jp/daily/english/06_10.html

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