Reactor 2 needed Depleted Uranium and/or Americium injection, said NRC email — ‘Uncontrolled criticality’ discussed

Published: January 2nd, 2012 at 9:42 am ET


March 15th, 2011 – “Re-criticality” is a major concern – I hope transient will become stable, Enformable, Dec. 30, 2011:

[…March 15, 2011…]

I have received the email below from Mr. [Wataru Mizumachi, Japan Nuclear Energy Safety Organization Executive Advisor], past ISOE Bureau Chair. He provides his current assessment of the TEPCO Reactor situation. The plant operators are making significant sacrifices to keep cooling water over the core in a very challenging environment.

Dr. Mizumachi indicates the “re-criticality” is the major concern at this time.

David W. Miller
Radiation Protection Dept.
Cook Nuclear Plant




We had one of the worst earthquake in the world in the north part of Japan where 15 thousands people may be killed by the 30 feet Tsunami which we never experienced.

As for Fukushima Nuclear Power Station, the reactor building is bad shape.

TEPCO is inserting the sea water into the RPV and I hope the transient will become stable.

The-decay heat may stay for months, but we can control it.

Right now we may have to consider about the re-criticality.



Wataru and Yoshihisa,

It appears the Unit 2 may be headed to an uncontrolled criticality. Pat Robinson, recommends a Los Alamos Chemical Engineer Expert to TEPCO. His name is Gordon Jarvenian PhD at _________________(b)(.)

The seawater is flashing to steam as I understand it. TEPCO will need to inject depleted Ur and/or Am-241 in the partially core to poison the uncontrolled criticality mass. Gordon may know how to do this.

I wish you the best in responding to this rare and unusual nuclear plant event.

David W. Miller, PhD
NATC Regional Director
Radiation Protection Dept.
Cook Nuclear Plant


See the a scan of the original email here

See also: [intlink id=”alert-nrc-reactor-2-burned-continuously-several-days-after-meltdown-hydrogen-ignited-video” type=”post”]{{empty}}[/intlink]

Published: January 2nd, 2012 at 9:42 am ET


Related Posts

  1. Tepco Email: Possible re-criticality in Reactor No. 2 May 30, 2012
  2. TEPCO: Either neutrons caused “chain reaction” OR a criticality due to increased water injection November 2, 2011
  3. Top Japan Nuke Expert: Sustained “re-criticality” of melted fuel may have occurred in Reactor No. 2 — TEPCO claims no sustained criticality November 2, 2011
  4. Busby: On-going fission is occurring at Fukushima — Either a recent “enriched uranium fission” or an “explosive criticality” November 6, 2011
  5. 82°C at Reactor No. 2 — Keeps rising even after injection of more water — Tepco “set to dump in boric acid” February 12, 2012

16 comments to Reactor 2 needed Depleted Uranium and/or Americium injection, said NRC email — ‘Uncontrolled criticality’ discussed

  • BreadAndButter BreadAndButter

    The “Japanese Nuclear Energy Safety Organization Executive Advisor” mails to the Radiation Protection Unit of the Cook NPP in the US for help.
    As a consequence, an engineer from Los Alamos is invited to open new markets for depleted uranium, which the US Army uses en masse.


  • radegan

    “Got a fire in your kitchen? Don’t use those old whimpy fire extinguishers, do what nuclear engineers do when they have to put out a really hot fire – use the new TEPCO Depleted Uranium Fire User System, or DUFUS for short. Get one for your kitchen today, get a second one free, just pay shipping and handling. Call now, supplies limited.”

    • aigeezer aigeezer

      Guaranteed for the life of the planet or 300 days, whichever comes first.

    • Spectrometising

      Why don’t they just ring up the pentagon???? Tell them there is a guy with a turban and a suitcase in the reactor, and they will supply entirely for free a nicely coloured orange depleted uranium bunker buster bomb entirely at no charge for TEPCO.

    • Spectrometising

      @ radegan: I think mine was the more inexpensive and hassle free option. No offence.

  • or-well

    Inspiring. “I hope”,”may stay for months”,”may have to consider”,”Gordon may know how”………
    Certainty to be found only in subsequent spin and the depth of the shit they’re in.

  • LetThemEatYellowCake LetThemEatYellowCake

    I wonder how much they’d have to inject in a process like that. Does anyone think it was done or think we have results that would suggest it? albeit we have little testing results available to us… maybe the accounting for the difference of the Arctic/Ireland vs. lower band?

  • or-well

    depleted UR “and/or” Am-241

    Hey lets make toxic stew
    throw stuff in the pot
    lets see if it glows or
    stops getting hot.
    A little of this, a little of that –
    why not might as well
    when up creek named shat
    and can’t find a paddle
    so put on yer goggles
    it’s time for some science!
    It makes the mind boggle –
    So lacking in conscience.

  • Bobby1

    Gordon Jarvinen is an expert of nuclear separation technologies at Los Alamos.

    • LetThemEatYellowCake LetThemEatYellowCake

      It looks like he’s pretty talented in plutonium and actinide separations too. Perhaps.. nevermind wishful thinking..

  • CaptD CaptD

    This says it all:
    “i hope the transient will become stable.”

    Even Nuclear profession­als are left HOPING that things do not go critical (pun intended).­..

    Much more on HP:

  • CaptD CaptD

    Many MORE NRC emails, it may take a bit to load, but I suggest that you save to disc!

  • Tumrgrwer Tumrgrwer

    Thanks CaptD for the NRC emails, I feel much safer now, knowing these people got our backs…….
    Emergency Preparedness Response Network (EPRNet). Another expensive story book manufacturer for our perusal.

    Let us be kind, one to another, for we are each of us together in our pain!

  • Knowing Japanese pride and historical traditions just a little, I doubt they ever asked for or received any help from this guy.

    At least in Russia at Chernobyl, they TRIED with massive efforts and huge numbers of people to put the out of control radioactive fire OUT, using thousands of tons of boron, sand, and lead.

    Yea, they might have contaminated much more landscape with the lead, (much of it vaporized and went along with the radioactive elements to poison surrounding landscape) but they did actually accomplish putting the fire out.

    No studies have yet been done on what REALLY worked there to put that fire out. Was is the sand that diluted the corium and lowered its temperature, making it into a kind of glass?

    Was it the boron, which slowed the reactions?

    Was is the lead? Why did they even use it in the first place?

    No one knows, and no one yet seems to care… as if we would never have another melt down and melt through.

    Now we have SEVERAL melt downs and melt throughs, with what looks like at LEAST ONE NUCLEAR explosion that wiped out Reactor #3 at Fukushima, plus possibly the spent fuel pool there.

    Are they using anything that was learned from Chernobyl? Did they learn anything from Chernobyl as far as putting these fires out?

    It seems from the non action, non intervention strategy that they are taking with very few people compared to Russia and Chernobyl, that no one cares if the out of control nuclear fires ever go out. They do not seem to even care to find out WHERE THEY ARE.

    Meanwhile, the radiation releases continue and no one seems to even care how much total radiation was or is being released.

    So it goes in la la land, where up is down and down is up.