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Why I am not worried about Japan’s nuclear reactors
Morgsatlarge ^ | 3/13/2011 | Dr. Josef Oehmen (M.I.T.)

Posted on 03/13/2011 9:24:12 AM PDT by Qbert

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1 posted on 03/13/2011 9:24:19 AM PDT by Qbert
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To: Qbert

bump


2 posted on 03/13/2011 9:31:04 AM PDT by goodnesswins (Unlike the West, the Islamic world is serious.)
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To: goodnesswins

bookmarked


3 posted on 03/13/2011 9:35:43 AM PDT by Charlespg
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To: Qbert

bump!


4 posted on 03/13/2011 9:37:50 AM PDT by EBH ( Whether you eat your bread or see it vanish into a looter's stomach, is an absolute.)
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To: Qbert

Thanks Qbert!


5 posted on 03/13/2011 9:39:06 AM PDT by SteamShovel ("Does the noise in my head bother you?")
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To: Qbert
Very lucid explanation. This guy should be on TV every channel. Thanks for posting this.
6 posted on 03/13/2011 9:43:46 AM PDT by hinckley buzzard
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To: Qbert

We have our hysteria, its ours, we worked for it, we earned it and nobody is going to take it away!


7 posted on 03/13/2011 9:43:59 AM PDT by count-your-change (You don't have be brilliant, not being stupid is enough.)
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To: Qbert

Fascinating stuff - thanks for posting.


8 posted on 03/13/2011 9:46:49 AM PDT by andyk (Wealth != Income)
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To: Qbert

” But you will know more about nuclear power plants after reading it “.
And I thank you for that Qbert,
Good job


9 posted on 03/13/2011 9:50:31 AM PDT by Joe Boucher ((FUBO))
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http://www.freerepublic.com/focus/bloggers/2688107/posts


10 posted on 03/13/2011 9:54:38 AM PDT by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
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To: Qbert

Best... Analysis... Yet...

Bravo!


11 posted on 03/13/2011 9:57:27 AM PDT by HangnJudge
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To: Qbert

Thank you. Very interesting.


12 posted on 03/13/2011 10:00:33 AM PDT by JimSEA
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To: Qbert

Thanks for the post, but I’ll be damned before I hang out near that plant.


13 posted on 03/13/2011 10:05:12 AM PDT by eyedigress ((Old storm chaser from the west)?)
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To: Qbert
Thanks for the information. I haven't had time to read the whole article and am wondering if their spent-fuel facilities are safe. They have over fifty nuclear plants so there must be a lot of waste somewhere.

Afterthought . . . maybe your knowledge could be used in a constructive way to clean up the mess (among others) left at Hanford, Washington.

14 posted on 03/13/2011 10:05:50 AM PDT by TiaS
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To: Qbert

The Japanese BWRs do not have a core catcher. There is nothing like that incorporated in GE’s design unless it was some sort of add-on. At TMI the internals in the reactor including the fuel rods, control rods and the stainless steel rack support structures completely melted. All of that ended up in the bottom of the reactor looking like a pile of rubble. The reactor (4” thick steel) was never breached.


15 posted on 03/13/2011 10:10:59 AM PDT by meatloaf
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To: Qbert

Excellent post. Thanks.


16 posted on 03/13/2011 10:17:19 AM PDT by all the best
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To: Qbert; andyk
Fascinating stuff - thanks for posting.

I agree. Thanks Qbert and thank to Dr Josef Oehmen.

17 posted on 03/13/2011 10:23:19 AM PDT by PGalt
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To: Qbert

Good post. Mostly accurate.


18 posted on 03/13/2011 10:23:31 AM PDT by Nuc 1.1 (Liberals aren't Patriots. Remember 1789!)
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To: Qbert; andyk
Fascinating stuff - thanks for posting.

I agree. Thanks Qbert and thanks to Dr Josef Oehmen.

19 posted on 03/13/2011 10:23:41 AM PDT by PGalt
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To: Qbert

I wish this could be posted on the Front Page, I am SO tired of the chicken Littles on every quake thread on FR....


20 posted on 03/13/2011 10:24:29 AM PDT by ScreamingFist (Quiet the Idiot)
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To: Qbert

I bow to your excellent post.

Love the fact that the material has a half life of mere seconds and is not really a threat.

Further, the entire containment system and Dr. Oehmen’s explanation is superb.

Now I can go on about my day and give a quick tutorial to others, hopefully giving them ease of mind.


21 posted on 03/13/2011 10:28:16 AM PDT by Vendome ("Don't take life so seriously... You'll never live through it anyway")
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To: TiaS

Thanks.

Just to clarify, I’m not the author of the blog- I just felt it was important to post this because there seems to be a lot of misinformation floating around the Internet about the reactors.

(I will be speaking this week with a friend of mine whose father is a nuclear scientist, and will try to see if he has any further information that may be helpful.)


22 posted on 03/13/2011 10:30:35 AM PDT by Qbert ("I seem to smell the stench of appeasement in the air" - Margaret Thatcher)
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To: hinckley buzzard
This guy should be on TV every channel.

Oh no! Can't let *that* happen. If he did, then people would no longer be alarmed, and they [gasp] might stop watching 24-hour news! The loss of advertising revenue! Think of the loss of revenue!

23 posted on 03/13/2011 10:35:18 AM PDT by COBOL2Java (Obama is the least qualified guy in whatever room he walks into.)
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To: Qbert

Thank you!

The reporting has been atrocious.


24 posted on 03/13/2011 10:36:48 AM PDT by FrogMom (There is no such thing as an honest democrat!)
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To: Qbert
Very informative.

Can anyone verify there is, in fact, a 3rd containment at the reactor in question?

25 posted on 03/13/2011 10:37:36 AM PDT by Mariner (USS Tarawa, VQ3, USS Benjamin Stoddert, NAVCAMS WestPac, 7th Fleet, Navcommsta Puget Sound)
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To: Nuc 1.1
For those of us who are not engaged in nuclear physics and found the good doctor's commentary very clear and informative, could you please elabourate on any inaccuracies.

Also, what is the half-life of the radioactive isotopes of iodine and cesium to which the doctor refers? These numbers did not appear in the article (or, perhaps I just missed them). These would seem to be somewhat of importance, as radioactive cesium is oftentimes mentioned as the principal nasty agent in a (putative) terrorist dirty-bomb attack.

Thank you for any corrections/information you can add, and FReegards!

26 posted on 03/13/2011 10:37:36 AM PDT by SAJ (Zerobama -- a phony and a prick, therefore a dildo)
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To: Qbert

Thnaks for this.


27 posted on 03/13/2011 10:37:56 AM PDT by mad_as_he$$
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To: Qbert

Thanks for this.


28 posted on 03/13/2011 10:38:05 AM PDT by mad_as_he$$
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To: Robert A. Cook, PE

Ok this makes more sense than the “diesel fuel was contaiminated with seawater” line from yesterday.


29 posted on 03/13/2011 10:40:20 AM PDT by mad_as_he$$
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To: Qbert
Thanks for posting this, and thanks to the original author for explaining the situation.

Did anyone else have to look up the word "tendentious?" Or am I just the product of a State educational system? :-)

30 posted on 03/13/2011 10:47:50 AM PDT by ThunderSleeps (Stop obama now! Stop the hussein - insane agenda!)
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To: SunkenCiv

I vote for this thread, because it was posted in full. :-)


31 posted on 03/13/2011 10:50:07 AM PDT by Larry Lucido
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To: Mariner; Qbert; All
OK, I just looked some things up and I have to call BS! on this "blog". No fault to Qbert, he's just passing it along.

First, the GE BWR-1 reactor in question has NO 3rd containment. If the "pressure cooker" is breached, the fuel is exposed to the environment.

Secondly, Cesium-137 has a 30yr half-life. If you were to get a big breath full of that steam, you would likely have health problems, if not serious health problems. That's not to say it was concentrated or didn't adequately disperse at sea.

32 posted on 03/13/2011 10:53:19 AM PDT by Mariner (USS Tarawa, VQ3, USS Benjamin Stoddert, NAVCAMS WestPac, 7th Fleet, Navcommsta Puget Sound)
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To: Qbert
I will try to summarize the main facts. The earthquake that hit Japan was 7 times more powerful than the worst earthquake the nuclear power plant was built for (the Richter scale works logarithmically; the difference between the 8.2 that the plants were built for and the 8.9 that happened is 7 times, not 0.7). So the first hooray for Japanese engineering, everything held up.

When the earthquake hit with 8.9, the nuclear reactors all went into automatic shutdown. Within seconds after the earthquake started, the moderator rods had been inserted into the core and nuclear chain reaction of the uranium stopped. Now, the cooling system has to carry away the residual heat. The residual heat load is about 3% of the heat load under normal operating conditions.

Good post overall, but the earthquake was 8.9 at the epicenter, not where the nuclear reactors are.

33 posted on 03/13/2011 11:00:20 AM PDT by Moonman62 (Half of all Americans are above average. Politicians come from the other half.)
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To: Al B.

Good read.....


34 posted on 03/13/2011 11:01:52 AM PDT by HalfFull ("Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery?" -PHenry)
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bookmarked


35 posted on 03/13/2011 11:04:24 AM PDT by RckyRaCoCo (I prefer liberty with danger to peace with slavery, IXNAY THE TSA!)
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To: Qbert

THIS IS WHY I LOVE Free Republic!

Lots of accurate, comprehensive information, usually with references.

Thanks for posting, Qbert!


36 posted on 03/13/2011 11:04:44 AM PDT by BwanaNdege
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To: SAJ
Iodine 131 has a half life of about 8 days, so it's very radioactive and absorbed by the thyroid.

Cesium 137 is a lot less radioactive, it has a half life of about 30 years. As far as I know, it doesn't have a special affinity for a specific organ or tissue

37 posted on 03/13/2011 11:07:22 AM PDT by Toddsterpatriot (Math is hard. Harder if you're stupid.)
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To: Qbert

I am a perfect example of how partial knowledge can be dangerous. I nod to better information. My profs would’ve had my ass for some of my thoughts. Great info.


38 posted on 03/13/2011 11:10:49 AM PDT by reed13k (For evil to triumph it is only necessary for good men to do nothing.)
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To: Toddsterpatriot

Cesium is in the same grouping on the periodic chart (1A) as sodium and potassium and therefore could be found anywhere those two elements (or their salts) are found. In other words, just about everywhere.


39 posted on 03/13/2011 11:21:10 AM PDT by reg45
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To: neverdem; decimon; justa-hairyape; spokeshave; Tolsti2

*PING*


40 posted on 03/13/2011 11:22:01 AM PDT by grey_whiskers (The opinions are solely those of the author and are subject to change without notice.)
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To: Mariner

I wouldn’t go so far as to call it “BS”. That seems a bit harsh to a rather reasoned explanation by someone trying to help people to chill out, which is badly needed.

Let’s be charitable and call it inaccurate while we wait to see. As you implied, there is a lot of good info here.

If the author made an honest error which might invalidate the core of his analysis, then that will be apparent.


41 posted on 03/13/2011 11:31:58 AM PDT by rlmorel (How to relate to Liberals? Take a Conservative, remove all responsibility...logic...)
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To: Toddsterpatriot

It has been a while for me, but I do recall Cs-137 is very dangerous when inhaled or ingested. That was the case in South America when some people found a discarded medical source in a dump and broke it open to see what was inside.


42 posted on 03/13/2011 11:39:47 AM PDT by rlmorel (How to relate to Liberals? Take a Conservative, remove all responsibility...logic...)
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To: rlmorel

Yes, it’s a really dangerous gamma and beta source, but much less radioactive than iodine 131.


43 posted on 03/13/2011 11:50:59 AM PDT by Toddsterpatriot (Math is hard. Harder if you're stupid.)
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To: Qbert

OK, but nothing mentioned to reduce the threat of Mothra.


44 posted on 03/13/2011 11:52:56 AM PDT by Dr. Sheldon Cooper (I'm not insane, my mother had me tested!)
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To: Qbert

ping good post


45 posted on 03/13/2011 11:58:59 AM PDT by Cvengr (Adversity in life and death is inevitable. Thru faith in Christ, stress is optional.)
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To: Mariner

“First, the GE BWR-1 reactor in question has NO 3rd containment. If the “pressure cooker” is breached, the fuel is exposed to the environment.”

From where are you getting this information?


46 posted on 03/13/2011 12:02:27 PM PDT by Qbert ("I seem to smell the stench of appeasement in the air" - Margaret Thatcher)
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To: Qbert

I think he is correct on this, containment appears to be a identified weakness in this circa 1971 design.


47 posted on 03/13/2011 12:36:08 PM PDT by rlmorel (How to relate to Liberals? Take a Conservative, remove all responsibility...logic...)
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To: Qbert

Time,distance & shielding.....


48 posted on 03/13/2011 12:44:03 PM PDT by stevecmd
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To: Larry Lucido

:’D


49 posted on 03/13/2011 12:49:56 PM PDT by SunkenCiv (The 2nd Amendment follows right behind the 1st because some people are hard of hearing.)
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To: rlmorel

“I think he is correct on this, containment appears to be a identified weakness in this circa 1971 design.”

—I’m just correcting the claim that the Fukushima reactors are BWR-1 types. They’re actually all BWR-3 and higher:

http://www-pub.iaea.org/MTCD/publications/PDF/CNPP2010_CD/pages/AnnexII/tables/table2.htm

As for containment flaws with this design- could well be, I don’t know. I’ll defer to the experts here.


50 posted on 03/13/2011 12:56:22 PM PDT by Qbert ("I seem to smell the stench of appeasement in the air" - Margaret Thatcher)
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