I presume that the fuel fell to the bottom of the containment vessel made of concrete and reacted violently with its cement"
http://mdn.mainichi.jp/mdnnews/news/20110809p2g00m0dm010000c.html
"I presume that the fuel fell to the bottom of the containment vessel made of concrete and reacted violently with its cement, releasing large amounts of radioactive materials into the outside from the pressure vessel," said Tanabe.
Study says nuclear fuel at Fukushima reactor possibly melted twice/
Experts have been wrong before really hoping this is not the case.Tdm
Atomic Explosion
:(
Nuclear blast (prompt criticality) in Fukushima-3 ...
GammaCam photos and other evidences of neutron induced radiation, indicate that a nuclear blast (criticality excursion) occurred at the Fukushima nuclear power plant.
Explosion films indicate that a suspicious blast occurred in Fukushima Building-3 on or about March 14, 2011.
What was the yield of the Improvised Explosive Device - nuclear
(IED-N)?
The explosion films indicate a blast on the Order of magnitude of about 5 Ton (TNT - Equivalent). This (WAG) is similar to the yield some of the USA Tactical Nukes deployed in Europe during the latter years of the Cold War.
I have not seen any official evaluation of the yield of this nuclear explosion disclosed in the popular press. No doubt the official yield figures were calculated in March 2011 under the provisions of the CTBT Organization. Also, the USA, Russian, Chinese and Japanese authorities would have independently calculated the blast parameters.
Critic needed science / nuclear engineer based answer
Ok U have probably already posted this you have been on this nuclear explosion...but any physicist care to read this PDF 4 pages it is explaining why Fukushima had nuclear criticality explosions. is this a possible scenario/ reason unit 3 was such a big explosion comparatively .
http://www.llrc.org/fukushima/subtopic/fukushimacriticality.pdf
James Bond --- 007
This little physics lesson was included in a 1964 James Bond movie. ‘Goldfinger’ used induced radiation in the plot. James Bond uncovers Auric Goldfinger's plans to attack the United States Bullion Depository at Fort Knox with a small nuclear bomb. The "nuclear device" as Goldfinger puts it, is set to explode inside Fort Knox making the entire gold supply radioactive for 58 years.
http://www.universalexports.net/Movies/goldfinger-gadgets.shtml
Gadget: Nuclear Bomb
Status: Disarmed
Description:
http://www.youtube.com/watch?v=KdQoSK9wibU
http://en.wikipedia.org/wiki/Goldfinger_(film)
close to a nuke
:
Common construction materials such as concrete, iron and brass are non-radioactive.
So it is a REALLY big deal when they suddenly BECOME highly radioactive.
Generally speaking that means that the materials have been bombarded with SLOW moving neutrons.
Either the materials have been placed inside a nuclear reactor or ...
The materials were very near a nuclear explosion.
Boiling And melting points
Boiling And melting points for uranium and plutonium oxides are not the same true?
CRC handbook look ups
Melting Point (Celsius):
(Pu - 639.4C, PuO2 - 2,400C) -
(U - 1,132.0C, UO2 - 2865C)
This kind of information is a look-up.
http://www.facts-about.org.uk/science-element-uranium.htm
http://upload.wikimedia.org/wikipedia/commons/0/08/Plutonium_Wikipedia_b...
Note:
Plutonium captures more neutrons and control is more difficult to maintain, than with uranium. Thus, the most likely suspect is the plutonium.
Pu (elemental) lookups
Example lookup information for metallic (elemental) plutonium:
Really no more complicated than a menu at a fast food restaurant.
Plutonium
Appearance
silvery white
General properties
Name, symbol, number plutonium, Pu, 94
Pronunciation /plu??to?ni?m/
ploo-toe-nee-?m
Physical properties
Phase solid
Density (near r.t.) 19.816 g•cm?3
Liquid density at m.p. 16.63 g•cm?3
Melting point 912.5 K,639.4°C,1182.9°F
Boiling point 3505 K,3228°C,5842°F
This was around March 21?
This was around March 21? What happened with the fuel after that?