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They lost cooling for a period of time at TMI, but were able to get it going again before the melting core could breach the reactor pressure vessel. They had sufficient cooling water to take away the heat of the reaction, apparently it was very close to getting away from them, they got lucky (or the engineers that designed it knew what they were doing).
Originally posted by cripmeister
I've been reading about the TMI accident where half of the core melted. But I haven't been able to find an explanation to why the core only partially melted, does anyone know what stopped the process?
Originally posted by DancedWithWolves
Where are our world leaders in this crisis? The longer this goes on, the more I find it insane that our world leaders are not front and center in leading the charge to help.
TEPCO vice-president Sakae Muto told journalists at the company's latest briefing that test results showing the plutonium came from samples taken a week ago.
Three plutonium isotopes -- Pu-238, -239 and -240 -- were found in soil at five different points inside the plant grounds, Tokyo Electric reported. It said that plutonium found in two of the samples could have come out of the reactors that were damaged by the March 11 earthquake and tsunami that ravaged northern Japan.www.cnn.com...
What if the release of elements in the smoke and vapour were not just radioactive iodine, caesium and uranium but a MOX combination including plutonium?
This would explain why the workers were immediately evacuated given the deadly nature of plutonium;
Plutonium is extremely difficult to detect because it emits limited gamma rays -- unlike radioactive iodine, caesium and uranium -- and it is deadly; Plutonium release would not show up as a radiation spike;
Plutonium 239 is the deadliest element known to man;
Half-life of Plutonium-239 in MOX is 24,000 years: Few milligrams of P-239 escaping in a smoke plume will contaminate soil for tens of thousands of years
A body was found yesterday containing high levels of radiation in the town of Ookuma-cho, about 5 kilometers from the Fukushima Dai-ichi power plant. The Fukushima Police Department received a report of an unidentified body laying outdoors in the area. About 15 policemen dressed in protective gear went to the area.
Since the police detected dangerous levels of radiation, they decided not to take the body back with them, according to NHK. The police did not disclose the level of radiation.
Fukushima Daiichi's seventh and eighth reactors will be finished in October 2013 and 2014, a year later than planned, the utility said today. The company may have to report safety breaches in addition to a possible chain reaction during a shutdown three decades ago, said President Tsunehisa Katsumata.
Yeah, I got that impression from posters overnight.
Originally posted by cripmeister
reply to post by butcherguy
Thanks. From following this thread it seems to me that several posters are under the impression that once nuclear fuel rods have started to melt the process is unstoppable. There's no such thing as a partial meltdown yet that's what happened at TMI. Confusing to say the least.