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.
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NHK World: Crack Near #2 Reactor Has Stopped Leaking Radioactive Water into Ocean
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Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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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
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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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.
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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).
...
Twitter: @RonanKelly13
The views expressed are mine alone and do not represent the views of my employer or any other person or organization.
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