Meltdown Confirmation

Reactor with fuel melt pool (Image from Japan Probe Blog: http://www.japanprobe.com/2011/05/13/meltdown-confirmed-at-fukushima-daiichi/)

There’s been confirmation in the press in the last few days that Daiichi #1 did indeed suffer a partial meltdown. Kevin was right

From Kevin[10:38 am Saturday 12th March]: 

“Those images of the reactor containment building post the explosion say it all. I think it’s eventually going to turn out to be the case that they’ve had a partial core melt.”

The Telegraph reported on Thursday:

Engineers from the Tokyo Electric Power company (Tepco) entered the No.1 reactor at the end of last week for the first time and saw the top five feet or so of the core’s 13ft-long fuel rods had been exposed to the air and melted down.

Previously, Tepco believed that the core of the reactor was submerged in enough water to keep it stable and that only 55 per cent of the core had been damaged.

Now the company is worried that the molten pool of radioactive fuel may have burned a hole through the bottom of the containment vessel, causing water to leak. link to article…

According to Japan Probe blog, Kunihiko Takeda of Chubu University told The Japan Times that reactors No. 2 and 3 may also be in the same situation.

Sometimes there is no joy in being right.

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4 Responses to Meltdown Confirmation

  1. gallopingcamel says:

    If you have a partial core melt and the secondary containment structure is intact, how does radiation get out?

    Am I wrong in assuming that the radiation detected outside the plant boundary came from the spent fuel rods in the cooling pools that dried out?

  2. bubbagyro says:

    This is not a melt down, technically. It is just rods melting, but not escaping into the ground beneath the reactor, the criterion for a melt down. It is partial rod melting, but not a “melt down”.

    Reply: Indeed – thank you for underlining the point, Verity

    • Pascvaks says:

      Call it a “Public Outcry Melt Down” brought on by the World Wide Media. The use of the term Melt Down, or Global Warming, or whatever, all become redefined once they are published or spoken. You know, most of the problems in this World are caused by people who have no idea what they’re talking about AND they’re paid to do it. Wonder if that’s always been true? Bet it has been;-)

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