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Fukushima’s Melted Reactors 500 Days On

Radioactive Inventory Numbers

 

          …by Bob Nichols

OFF LIMITS – WASTED – RADIOACTIVE

(San Francisco) – Dr. Paolo Scampa, PhD, a well-known physicist in the European Union, has prepared a radioactive inventory of Fukushima Daiichi’s destroyed  nuclear power plants 500 days after the meltdown of three disemboweled, mangled reactors.

The violent extinction level event occurred Mar 11, 2011. The deadly meltdown and dispersion of radioactive fuel throughout the world is on-going to this day.

Because of the nature of long-lived and short-lived radioactivity, this summation of the radioactive Fukushima inventory is valid for many years. Dr. Scampa’s inventory is current as of Friday, June 29, 2012.

There are 1,946 radioactive products produced by nuclear weapons and atomic reactors according to the Oak Ridge Nuclear Weapons Lab in America.

Fifty-five are considered to be long-lived; 898 are considered to be short-lived but last more than eight days. These nine hundred fifty-three radioactive isotopes are included in this analysis.

Nine hundred ninety-three (993) radioactive isotopes are considered dangerous and undergo radioactive decay within eight days; they are not included in this analysis.

Dr Scampa’s article is available to French speakers and all who wish to review the original French here.

I am solely responsible for any and all translation errors.

_______________________

FRIDAY, JUNE 29, 2012

New inventory of reactor fuels 1, 2 & 3 of Fukushima

… by Dr. Paolo Scampa, AIPRI

 

(European Union) - In light of the recent facts so testified of the medium rates of effective combustion (23.35 GwJ/t) and of enrichment (3.7%) of the reactors 1, 2, and 3 of Fukushima Daichi advanced by a team of Japanese nuclear physicists,  after numerous rough sketches of reduced numbers, AIPRI is finally in condition to present a realistic inventory of fission and activation products of the 257 tonnes (1) of fuel in the three eviscerated reactors at Fukushima Daiichi. (Radionuclide Release to Stagnant Water in Fukushima-1 Nuclear Power Plant. See below.)

Alas, contrary to our reductive conjectures from the past there are many more fission products and long-lasting activation products than we had all too optimistically imagined.

It is not 3.7 tonnes, but instead more than 6 tonnes of material that was subject to fission; it is no longer 2.1 tonnes, but 2.8 tonnes that have been activated into heavier radioactive elements. To our great regret, the potential content of long-lasting radiotoxicity is well above our original estimates.

[See spreadsheet No 1, the first of six.]

The three melted reactors combined in Fukushima Daichi contained 257 tons of nuclear fuel enriched to 3.7% Uranium 235 and divided into 1,496 assemblies,  each about 172 kg.

Reactor No. 3 also housed 32 MOX assemblies, reportedly enriched to 6% or 330 kg of Pu239.

In addition, the storage pools of these reactors have at least 239 tonnes of fuel residing there for who knows how long (1,390 assemblies) and 31 tonnes of fresh fuel (180 assemblies).

At a total electrical capacity of 2,028 MWE (2), these reactors fissioning together, had a total fission of around 1.847E20 (3) atoms per second (≈ 0.0726 g) that is to say, 6.27 kg of material per day.  

The activity attained by a radioactive element in a fuel is found to be that number of fissioned atoms per second with a constant * the total product of fission of the element being considered * e(t -λ) the probability factor 1-e(t – λ) is 1 in the case of perfectly balanced elements. NB. t is the time spent in the reactor.

The day of the earthquake their fuel was consumed according to the article cited at an average of 23.35 GWd/t at a rate of 24.07 kg/t for a total of 6.186 tonnes of fuel fissioned.

The atoms of U235 only comprise a fraction of the fissioned atoms of these 6.186 tonnes. This led to the probable fission of around 3.46 tonnes of U235 (56%), 1.86 tonnes of Pu239 (30%), 0.49 tonnes of U238 (8%) and 0.37 tonnes of Pu241 (6%).

At the time of the accident, there remained around 3.14 tonnes of fission products of the 6.19 tonnes produced over the course of time.

This fuel as well harbored around another 2.84 tonnes of residual activation products (32 assemblies of Pu239 MOX fuel are not included here) over the 5.01 tonnes of activation products produced over time. At the moment of the emergency stop, about 1.1% of the fuel was comprised of activation products.

Overall, 9 tonnes of fuel was subjected to atomic fission or activation transformation occasioning a prodigious explosion of radioactivity and radiotoxicity which over time, is several times the amount needed to kill by internal contamination the whole human race.

K. Nishihara, et al., “Radionuclide release to Stagnant Water in Fukushima-1 Nuclear Power Plant,” Trans. At. Energy Soc, Japan, Vol 11 (1), pp 13 – 19, 2012 (in Japanese).

The atomic factory disemboweled and fanned out

 

For such a burn up of 23.35 GWd/t and such a mass as 257 tonnes of UOX the total radiological activity at shutdown is on the order of 29.14 billion Curies [Ci,]  that is 1.078E21(4) Bq of which 4.97 billion Ci (1.84E20 Bq) is released as gas.

At the shutdown the elements of less than one year half life, hold 99.33% of the radioactive activity and 65.32% of the radiotoxicity. The half-life elements of more than a year represent only 0.67% of the radioactivity but 34.68% of the radiotoxicity.

[See spreadsheet No 2:]

The most remarkable of the volatile elements (elements of which the boiling point is inferior to 1,500 degrees Centigrade and escape above all the first coriums). 37,921 PBq; 1 billion Ci; 18 billion potential inhaled lethal doses.

The official report of the Japanese government to the IAEA [International Atomic Energy Association] contains a hypothesis that the emanations of nuclear fuel from Fukushima Daiichi are equivalent to the ones observed at Chernobyl.

We can see by comparing the subsets of figures below that the radioactive particle emission through the air from Fukushima is not only 3.7 times higher than Chernobyl; but, more importantly, 28.3 times more radiotoxic with every breath you take.

Copyright 2012 by Bob Nichols, All Rights Reserved. Republishing allowed with all Sources and Notes included.

Sources and Notes.

“New inventory of reactor fuels 1, 2, & 3 of Fukushima,” by Dr Paolo Scampa, Jun 29, 2012, AIPRI Blog, http://aipri.blogspot.it/2012/06/nouvel-inventaire-des-combustibles-des.html  http://tinyurl.com/7j8npql

(1) “Tonnes” in the singular is defined as 1,000 kg. each and 2,200 lbs each.

(2) A single MWE is defined as One Million Watts of Electricity.

(3) The decimal equivalent of 1.847E20 is 184,700,000,000,000,000,000 atoms per second fissioned. The number is spoken as: one hundred eighty-four quintillion, seven hundred quadrillion.

(4) The decimal equivalent of 1.078E21 is 1,078,000,000,000,000,000,000 Bq. The number is spoken as: one sextillion, seventy-eight quintillion. One Curie is equal to 37 Billion Becquerels per second. One Becquerel is one atomic disintegration per second.

Dr Scampa’s first included spreadsheet from the AIPRI article. There are six total.

Spreadsheet No 1: AIPRI, Jun 2012

Fukushima Daichi

1F1

1F2

1F3

Total

Rate of U enrichment235

3.70%

3.70%

3.70%

3.70%

Mwe

460

784

784

2,028Mwe

tons of fuel

69

94

94

257 t

Nb assemblies

400

548

548

in

U235 t1496.

2.55

3.48

3.15

9.18t

Pu239 (Mox enriched to 6 %)

0.330.33

T

Average Burnup GWd / t

25.8

23.1

21.8

23.35 GWd / t

kg per tonne fissioned

26.59

23.81

22.47

24.07 kg / t

Tonnes fissionnées by heart

1.835

2.238

2.113

t6.186

Note. 1 GWd / t ≈ 1.0309 kg did. / T

≈ 172 kg per assembly

Spreadsheet No 2, 3, 4, 5 and 6.:
Go to Dr Scampa’s original AIPRI Blog for the detailed spreadsheets Nos. 2, 3, 4, 5 and 6. They are all here: http://aipri.blogspot.it/2012/06/nouvel-inventaire-des-combustibles-des.html
Or, http://tinyurl.com/7j8npql

 

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10 Comments for “Fukushima’s Melted Reactors 500 Days On”

  1. From the information presented here as well as your previous articles it would appear that smokers will be among the first to experience a large uptick in mortality followed by us older folks, the very young and the chronically ill. Hitler with his aggressive eugenics program would certainly have approved. Sure will cut down on the population of old soldiers.

    • Your right, ethanallen.

      The slaughter of the innocents has already started, though. They were the very first to be consumed in the Fuku Kill. Fetuses, new borns and killer Rads do not mix; and, the lil babies always lose that fight. So they are first to die and the cull continues daily.

      The next big group is probably kids and geezers who spend a lot of time outside. That is a sure ticket to extinction. ‘Tis a pity, that the Nuker Pied Pipers are talking all these kids, and oldsters too, into these idiot “demonstrations” against the very human animals that killed them and their friends.

      I’m speaking of the demonstrators as the newly dead here, ‘cos they are short for this world. Walking willingly into this Open Air Auschwitz is a whole new definition of Stupidity.

      Yea, make a list of the things you do that are stupid and change them, if you can.

      If not, ask yourself if you want to die where you sit. Pretty simple really.

      Bob Nichols

  2. So was this a mismanaged accident, unintentional sabotage by spread of Stuxnet, or deliberate sabotage by the usual suspects?

    • Good question. What do you think?

      I wrote an article Saturday, June 9th, 2012 with the arresting title of “Kill One Kill Twelve Kill Millions Kill Billions,” where I reported that three or more meltdowns were inevitable. The meltdowns were guaranteed to happen since the utterly required big emergency generators on Fukushima Reactors Nos 1, 2, 3 and 4 were the wrong voltage for the life saving or life taking pumps. There is no way in hell the wrong voltage emergency generators would ever do the job. That was guaranteed from the get-go.
      http://www.veteranstoday.com/?p=210465

      All that had to happen was for the two external power lines to be cut to get the show on the road. After that, it was all downhill for this gig. The Earthquake and tsunami were just flashy distractions; not the real deal at all.

      That is an open and shut case of sabotage resulting in the death of millions; perhaps more, in my opinion. There is no statute of limitations, either.

      Bob Nichols

  3. Undoubtedly great atomic scientists like Brian Ross and Bob Schieffer are still 4Square behind atomic energy. Why, it’s cheap, efficient, and it charges your cell phone circuits, what more to expect? Fact is, we have not learned a damn thing since Chernobyl because somebody is running this show that knows nothing. The big, raging question is where to do we go from here? Is there any hope or are we, as people in line for a good basting of radionuclides, just waiting for our terminal exposures? Japan has shut down all their reactors, what have we, the smartest people in the world, done about our reactors?

  4. FactversusHype

    The coverup of this situation since the beginning is in keeping with a government that is completely out of control. Completely, purposely, out of control. Thank you for a very important article.

  5. Bob, Thanks for all you do keeping an eye on this story for the rest of us where new dramas tend to bury the old. I wish we had more people to work on follow ups on the so many stories that we have covered where the aftermath slips through our fingers.

  6. That’s a Bummer for all. Does it get better or worse with time?

    • It’s pretty straightforward, as much as this stuff can be.

      It gets worse. The kill-you-dead radiotoxicity goes up. Nothing can be done to stop it, it is the way it works.

      Bob Nichols

      • Bob, please stop “sugar-coating” this. I think we deserve a realistic assessment for once. Condos on Fukushima beach are priced to sell. Are you trying to halt the “economic recovery” of Japan?

        Please, speak with actual authority figures like Ann Coulter who know that radioactive exposure is actually good for us all. I feel confident that ‘she’ will lead the way and vacation on “said beach” sometime this year…or at least I hope so.

        On a serious note, thanks for keeping this “killing us softly” issue in the headlines. The silence on this historically unparalleled disaster is deafening. Deafening in an overtly criminal aspect that should have “heads rolling”. But that would require a now very rare Earth element…JUSTICE.

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