Det är inte bortom kontroll nu, men det är inte en idealisk situation heller. Kärnan i reaktor 1 är uppenbarligen skadad, som betyder att de radioaktiva gaser i bränsleelementen kommer att frigöras. Hur mycket är ännu inte känt. Kärnan i enhet 3 kan också vara skadad, men kanske mindre än enhet 1.
Såvitt jag vet försöker de kyla av reaktorerna (U1 och U3) med havsvatten och borsyra. Det här är väldigt drastiskt och betyder i stort sett att man stänger ner dem för gott.
Om reaktorn kyls med havsvatten, har de mer eller mindre kontroll över situationen - men som sagt, ingen idealisk situation heller.
Man kommer att släppas ut radioaktiva Xe och Kr, men de kommer att spädas ut i luften, som bör blåsa ut till havs. Men vi måste vänta och se hur mycket som släpps ut.
Hur länge kan de tänkas behöva pumpa havsvatten innan temperaturerna är nere på säkra marginaler?
Handlar det om dagar? Eller veckor?
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Senast redigerad av SugaredThoughts 2011-03-13 kl. 21:12.
A former adviser on radiation to the UK government, Dr Christopher Busby, has told the BBC the situation at the nuclear plants is extremely serious. "Particularly concerning is the [Fukushima] number three reactor which I understand is in trouble now, because... it runs on a different sort of fuel; it doesn't run on uranium, it runs on a mixed uranium plutonium fuel, and plutonium is an extremely serious hazard so if this stuff comes out then it's going to make what's happened so far, in terms of the tsunami damage, look a little bit like an entrée to the real course."
Olycksbådande... Men vi får se... Lite sensationalistiskt kanske.
så m.a.o är dom förstörda för gott eller? vad är Xe och Kr? och kan det komma strålning upp till oss?
Har för mig att de ändå skulle avveckla Fukushima 1-1 under 2011 och senare bygga de planerade 1-6 och 7. Så rent ekonomisk lär det inte ha varit ett alltför svårt beslut.
Olycksbådande... Men vi får se... Lite sensationalistiskt kanske.
Verkar stämma:
MOX fuel loaded into Tokyo Electric's old Fukushima reactor
FUKUSHIMA, Aug. 21, 2010 (Kyodo News International) -- Tokyo Electric Power Co. (OOTC:TKECY) loaded plutonium-uranium mixed oxide fuel Saturday into a reactor at its nuclear power plant in Fukushima Prefecture in preparation for the largest Japanese utility's first plutonium-thermal power generation.
The No. 3 reactor at the Fukushima No. 1 plant would be the third in Japan to be used for the so-called pluthermal generation, but the only one among the three to have been subjected to antiaging treatment with 34 years since its launch.
Tokyo Electric plans to activate the reactor on Sept. 18 and let it start generating electricity on Sept. 23.
Pluthermal output has already begun at the No. 3 reactor of Kyushu Electric Power (OOTC:KYSEY) Co.'s Genkai plant in Saga Prefecture and the No. 3 reactor of Shikoku Electric Power Co.'s (OOTC:SHEKF) Ikata plant in Ehime Prefecture.
Om oturen verkligen är framme:
What is MOX?
MOX stands for "Mixed-Oxide Fuel." It is a nuclear power reactor fuel made from plutonium mixed with uranium. The U.S. Department of Energy (DOE) wants to make experimental MOX fuel using plutonium from dismantled nuclear weapons.
There is no doubt that we must contain the plutonium from nuclear warheads. It must neither enter the environment--where it can poison drinking water and virtually everything else with which it comes into contact--nor be accessible to terrorists or others who might wish to build atomic bombs.
But using plutonium as reactor fuel accomplishes neither of those goals.
* MOX fuel requires processing of plutonium before the fuel is fabricated, creating new plutonium-laced waste, added worker exposures, and releases to the environment.
* Transportation of the plutonium, even when armed guards are deployed, is an open invitation to terrorists or others seeking this deadly material.
* Use of MOX in nuclear reactors is not safe, and could result in serious accidents.
* Use of MOX would add to our nation's immense radioactive waste burden, and would make it more difficult to find scientifically-defensible solutions to our atomic waste problems.
MOX is dangerous
Use of MOX fuel attacks commercial nuclear reactors where they are the weakest. Many reactors are aging prematurely, and cracks are appearing in vital reactor components. Most atomic reactors were not originally designed to use MOX fuel and MOX makes key reactor components age even faster.
Because of its high "neutron flux" levels, the reactor pressure vessel can become embrittled and fail during accident conditions. A nuclear accident involving MOX fuel could cause a meltdown more serious than Three Mile Island or Chernobyl, because the levels of radiation inside a reactor using MOX are even higher than in a normal atomic reactor.
