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Fukushima had a melt through rather than a melt down

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NNN0LHI Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Jun-07-11 08:39 AM
Original message
Fukushima had a melt through rather than a melt down
http://www.bloomberg.com/news/2011-06-07/melted-fuel-at-fukushima-may-have-leaked-through-yomiuri-says.html

Melted Fuel at Fukushima May Have Leaked Through, Yomiuri Says

By Go Onomitsu - Jun 7, 2011 1:02 AM CT

The melted fuel at Tokyo Electric Power Co.’s Fukushima Dai-Ichi nuclear power station may have leaked through the pressure vessels of the Nos. 1 to 3 reactors, the Yomiuri newspaper reported.

The Japanese government will submit a report to the International Atomic Energy Agency that raises the possibility the fuel dropped through the bottom of the pressure vessels, a situation described as a “melt through” and considered more serious than a “meltdown,” according to the report, which cited the document.

---------------------------

Does this mean the fuel is in the ground somewhere now?
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FBaggins Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Jun-07-11 08:47 AM
Response to Original message
1. Not "rather than"... "in addition to"
You can't get a "melt through" without first having a meltdown.

Does this mean the fuel is in the ground somewhere now?

No... it means that some portion of the fuel is out of the RPV (the inner pressure vessel) and fell to the bottom of the primary containment structure.
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meow mix Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Jun-07-11 09:50 AM
Response to Reply #1
3. wrong again, as usual "situation at No. 1 is the more critical"
not that you care about anything other than your constant nuke lies. #1 is leaking like a sieve.


A TEPCO spokesman said on Monday that while those melted fuel rods inside 2 and 3 are still sitting at the bottom of their containment vessels, they are covered in water and stable, and damage to the vessels is “limited.”

The situation at No. 1 is the more critical: the fact that water levels inside the vessel are believed to be low indicates the slumped fuel may have permeated the vessel, creating holes through which contaminated water may be leaking into the plant.


http://ecocentric.blogs.time.com/2011/05/24/what-fukushima%E2%80%99s-triple-meltdown-means/
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FBaggins Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Jun-07-11 10:06 AM
Response to Reply #3
4. Um... I know you want an excuse to post... but was that in reply to something I said?
Edited on Tue Jun-07-11 10:07 AM by FBaggins
It doesn't appear to be.

Neither statement is "wrong"... let alone "again".
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NNN0LHI Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Jun-07-11 09:34 PM
Response to Reply #1
5. Does this report indicate the fuel is still in the bottom of the primary containment structure?
http://transcripts.cnn.com/TRANSCRIPTS/1106/07/jkusa.01.html

KING: And we have some video -- this is from TEPCO, the Tokyo Electric Power Company and it is of unit one. And I want to show this video and I want to ask you, Arnie Gundersen, when you look at this video -- as someone who understands the design, the engineering in here -- what are you seeing?

GUNDERSEN: It frightened me. What it's showing is that the nuclear reactor core has melted, and it's somewhere down below the floor. And you can just see boiling water and boiling steam coming out of that hole in the floor. It's the closest yet they've come to approaching that radioactive core. So, that was the first thing.

The second thing is that the robot -- these were taken with a robot -- measured a dose in that room of 400 rem per hour. We call that LD 50/50. And what that means is that it's a 50 percent chance you'll get a lethal exposure in one hour.

KING: So, if somebody was in that room for an hour or more, they're likely dead or seriously --

GUNDERSEN: Yes. If they're in that room for an hour, it's a quick death. It's not 10 years out. It's a 50/50 chance you'll die within a week.

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izquierdista Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Jun-07-11 09:43 AM
Response to Original message
2. And could still be falling
Uranium and plutonium are quite dense, so they could be heading deeper, it depends on the geology of the area. Maybe it will form a natural nuclear reactor like the one at Oklo: http://en.wikipedia.org/wiki/Natural_nuclear_fission_reactor
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