Search found 139 matches

by CharlesKramer
Tue Mar 29, 2016 7:47 am
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

Corium slag must make a complicated chemical soup. It starts with fuel and cladding at thousands of degrees... then add steel containment... then cement. In Fukushima add some salt (ocean) water. In Chernobyl add sand. And then the decay chain of the fuel. Then all that mess transmuting from neutron...
by CharlesKramer
Mon Mar 28, 2016 12:01 am
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

where do you think all the neutron absobing material from the control rod went? Also, how much concrete does the coreum have to burough through and what happens to all that material? Are you saying the China Syndrome is baloney because, in a worst case meltdown, the melting stops because: -- molten...
by CharlesKramer
Fri Mar 25, 2016 5:41 pm
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

And what makes fission scary: no off switch! False. Fission definately DOES have an off switch Definitely has an off switch... meaning control rods? My point is that does not apply to tons of corium slag which will remain hot accordingly to the rules of the decay chain (at at Fukushima so hot it ca...
by CharlesKramer
Fri Mar 25, 2016 5:30 pm
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

Wow, this discussion is great! A good antidote to the near silience about this is in the news. Thanks to you and all. There is no implication of recritiality So... no mystery why I don't see it discussed anywhere. FEAR sells and they sell a lot of it I understand that. Whenever anything dies (starfi...
by CharlesKramer
Fri Mar 25, 2016 5:18 pm
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

"Critical" in the bad sense is a construct of Hollywood and the mass media I can't reconcile that -- a view of criticality as a continuum -- to the Slotin accident at Los Alamos (criticality by fleetingly and accidentally joining the two halves of the demon core) and the Cecil Kelley cent...
by CharlesKramer
Thu Mar 24, 2016 6:18 am
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

More detailed explanations for me to ponder - thx! Interesting that Arne Gundersen's speculation about criticality may have been wrong. I am not sure why you are seemingly fixated on the word "critical". It only means that a core is producing enough neutrons to sustain its operating power ...
by CharlesKramer
Wed Mar 23, 2016 7:48 pm
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

I beleive the crack was blamed on an H2 pop in the donut. It was not due to the slag. I think there were two explosions (Unit 1 and Unit 3). I don't know which one has the crack in the cement containment. I believe Gundersen speculates the Unit 3 explosion was due to criticality. Here's Gundersen i...
by CharlesKramer
Wed Mar 23, 2016 2:40 pm
Forum: General
Topic: Fun with handheld radiation detectors
Replies: 10
Views: 2215

Re: Fun with handheld radiation detectors

paperburn1 wrote:http://www.mazurinstruments.com/Comparison_Matrix.html

Too cool! Thx for the link.
by CharlesKramer
Tue Mar 22, 2016 9:45 pm
Forum: General
Topic: Fun with handheld radiation detectors
Replies: 10
Views: 2215

Fun with handheld radiation detectors

Tobacco apparently absorbs lead when it grows, including lead-210 which is present in higher concentrations when phosphate fertilizer is used. Apparently tobacco is also contaminated with even more dangerous polonium-210 (which I believe is a daughter product of the lead). I think those isotopes are...
by CharlesKramer
Tue Mar 22, 2016 9:36 pm
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

Thanks to you (and all) for patient and detailed answers! And for the links, which I will read. Still... a scary situation. Even if the slags are unlikely to melt into the ground water, they were (are?) hot enough to threaten it indirectly (by cracking the cement part of the containment). Apparently...
by CharlesKramer
Tue Mar 22, 2016 5:37 pm
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

Thanks. You know stuff. And I understand some of the reportage about Fukushima is -- apart from silence -- hysterical. But... Even once you shut down a core, it still has residual heat as the daughter products burn off Shutting the core down means inserting control rods. But is that not irrelevant i...
by CharlesKramer
Tue Mar 22, 2016 3:06 am
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Re: Question about Fukushima in 2016

Fukushima went non-critical very quickly when the quake hit and control rods were inserted. Except there were meltdowns -- three of them. No one knows where the cores are, or the extent of the damage, but muon imaging suggests at least one of the meltdowns is 100%. https://www.rt.com/news/316593-fu...
by CharlesKramer
Mon Mar 21, 2016 11:18 pm
Forum: General
Topic: Question about Fukushima in 2016
Replies: 56
Views: 8403

Question about Fukushima in 2016

Is there a fission physicist in the house? I realize Chernobyl (graphite pile) and Fukushima (boiling water with metal containment vessel) are different technologies, but both had meltdowns, and both contain tons of melted nuclear fuel that no one knows how to remove (let alone "clean up")...
by CharlesKramer
Tue Apr 07, 2015 4:47 am
Forum: News
Topic: In Pursuit of Ignition on the National Ignition Facility
Replies: 28
Views: 8028

Re: In Pursuit of Ignition on the National Ignition Facility

http://large.stanford.edu/courses/2015/ph241/baumer1/ "At the beginning, NIF was expected to achieve ignition with room to spare. But as of February 2015, the best results at NIF are a factor or three short of achieving the Lawson criterion. [9] How did NIF end up missing its ignition target by...
by CharlesKramer
Sat Jan 10, 2015 6:10 am
Forum: News
Topic: Norman Rostoker of Tri Alpha - died
Replies: 5
Views: 3010

Norman Rostoker of Tri Alpha - died

ps.uci.edu/memorial/rostoker UC Irvine professor Norman Rostoker, the father of breakthrough clean nuclear fusion energy techniques via plasma-based accelerators, died on Christmas Day [2014] in Irvine, Calif. He was 89. In addition to serving on UCI’s faculty, Rostoker co-founded Tri Alpha Energy w...

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