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Posts Tagged ‘meltiing’

 

From 1989:

 

His studies:

checherov-imanaka

image from: http://www.rri.kyoto-u.ac.jp/NSRG/seminar/IS/Imanaka20120627.pdf

“Checherov analyzed all the reports and minutes of the Integrated expedition with measurements and calculations. The analysis estimated the amount of fuel made on the basis of thermal measurements showed that this estimate was based on assumptions that do not reflect the real picture of the thermal situation in unit 4, and secondly, were based on experiments that are not based on reliable measurements, and voluntarist declarations of expenditure thermal parameters experimentally recorded variations of which varies in the range of up to two orders of magnitude.” / “The maximum thickness of the fuel accumulation , measured on the spot and recorded on the film is 0.5 meters , and if you increase the thickness of the layer 8 times, then this cluster should have a thickness of 4 meters.” / “At the time of the accident in the reactor core were 1,659 fuel channels withg 190,257 kilograms of uranium or its kg Uranium Oxide (UO2).

AN Kiselev, Chernobyl, 1986, block 3: “Power of gamma radiation from a channel, lying on the roof of the third block measured by Zherdev was 2 Sievert per Hour (the limit of the measuring range of the instrument DP-5V ) at a distance of three meters” / “we had to work in an environment where radiation levels could exceed the 10 Sievert per Hour and even higher” / “As soon as the rotary drill bit to the fuel clusters, fuel chips along with the water got into the room , and immediately dramatically increased gamma-ray background” / “Biological protection of the camera has been redesigned in accordance with the requirements of radiation safety.” / “On the tube sites were about 15-20 tons of fuel. On the roof lay the whole fuel assemblies. Approximate weight of 300-350 kg each. The rate per person was calculated by removing 50 kg of graphite or 10-15 kg pieces of fuel rod.” / “the total amount of fuel in the lava-like clusters is within 20 % of the entire nuclear fuel that the reactor had at the time of the accident.”

“where, how much and in what state the nuclear fuel ?” / “Our reports of fuel found in the Unit 4 was several times smaller, but the debate as to why such differences exist and where the truth is – was not gebated in this symposium” / “regardless of the fact that the reactor vault is empty and you can not see this amount of fuel and the amount of such fuel just could not fit in the observed areas, those who were there and personally saw it with their own eyes the empty space – you can not convince the others that there are not huge amount of fuel as declared by those who have not been there ” / ” it turns out that the minimum found fuel is 53 % of the fuel, and if we accept the second version, you still have to find the 91%!http://www.souzchernobyl.org/?section=31&id=563

This is from an article of Mr. Kiselev, who was with Checherov INSIDE Chernobyl 4 where the fuel WAS, many many times. “The most significant work in its results was the work of the neutron research laboratory in the past year by VI Morozov. They compiled and analyzed its neutron measurements, which were carried out in the 4th block of Chernobyl nuclear power plant within a few years and determined the concentration of uranium dioxide in more than hundred samples of lava-like fuel-containing masses… After the publication of the work, where on the basis of direct measurements determined the amount of lava-like fuel-containing material (and the results of radiochemical and neutron research) determined the concentration of uranium dioxide in the samples of these masses: the number of detected nuclear fuel in the fourth block does not exceed 20% of all fuel… Research continued: 1991 results were: 23 +/- 7 tons of uranium dioxide – then 1992 research results reduced it to 11,6 +/- 1.9 tons, and direct measurements gave the result of 3,75 +/- 0.6 tons… All reports are published in separate editions, and the magazine “Atomic Energy” published several articles on the subject. The scientific community did not react to it.. the reactor pit is empty, and in under-reactor premises can not be seen such quantities of fuel, and such fuel volumes simply could not fit in the observed areas, and those who were there and personally saw with their own eyes the empty space are impossible to convince that there are huge amounts of fuel, which is proclaimed by those who have not been there… There is a total absence of an active zone in the reactor pit (!)… ”
http://www.souzchernobyl.org/?section=31&id=563

the Temperature of the Chernobyl nuclear explosion was 100,000 times lower (10,000,000%) than the nuclear explosion of the bomb type.

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“Two different models of the nuclear explosions are known. According to, the core of the Chernobyl reactor transformed to a turbo-jet solid-phase engine after a very short initial overheating of fuel. It flied like a missile from the reactor vault to the central reactor hall by the hydrodynamic forces of gas-phase streams flushing down from the fuel channels. Then it exploded as an atomic bomb in the spaceof the central hall.” source: http://www.rri.kyoto-u.ac.jp/NSRG/reports/kr79/kr79pdf/Malko1.pdfchernobyl-nuclear-explosion34

The thermal observation showed no melting process and no graphite fire.

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chernobyl4

IAEA says 96% of the fuel is still in the reactor. But it is not.

In September 1986 126 tons of graphite and 26 tons of fuel were removed from roofs at Chernobyl plant site.

If much Boron is used in western reactors, similar over moderated situations can happen.

Western reactors avoid explosions, via cooking and steaming the reactor cores and letting the aerolized inventory fly through the safety relief valves (SRVs). It`s like a pressure cooker.

NUREG 1250 also speaks of “aerolized” fuel particles after phase transition, on page 6-7.

The industry simply avoids the term “nuclear explosion in a reactor” and simply calls it: “prompt critical excursion.” That`s all.

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“an average operating nuclear power reactor will have approximately 16 billion curies in its reactor core. This is the equivalent long-lived radioactivity of at least 1,000 Hiroshima bombs.” http://www.nirs.org/factsheets/routineradioactivereleases.htm

chernobyl-nuclear-explosion39

Vladimir M. Chernousenko, Scientific Director of the Ukrainian Academy of Sciences  Institute of Physics in Kiev’s Task Force for the  Rectification of the Consequences of the Chernobyl Accident- HE SAID:

“Radiation emission was no less that 80% of the core (with a total of 192 tons), which amounted to 6.4 x 10^9 Ci (Ci = Curie = 37,000,000,000 becquerel) If we divide the figure by the population of the whole earth (4.6 x 10^9 people) then we get 1 Ci per person.”

http://www.ratical.org/radiation/Chernobyl/ChernobylIftI.html

“15m³ of radioactive substances emitted from Block 4 at this time could be diluted in 15 x 5 x 10,000,000,000,000 km³ if water, In 100 years 15,000 km³ would be needed. In 1,000 years 15 km³ would be the required amount. For comparsion: the total outflow of the world`s rivers is 36,380 km³.” Dilution is just another word for retransmission. More radiation for everyone.

 

My summary: https://tekknorg.wordpress.com/2016/04/21/nuclear-explosion-emptied-chernobyl-concealed-by-the-nuclear-industry/

 

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