Free Republic
Browse · Search
News/Activism
Topics · Post Article

Skip to comments.

Restoration at nuke plant disrupted, radiation fears spread to Tokyo
Kyodo News Japan ^ | 24 March 2011

Posted on 03/23/2011 1:09:44 PM PDT by AwesomePossum

...black smoke was seen rising at the No. 3 reactor building...surface temperatures...have topped the maximum levels...high-level radiation amounting to at least 500 millisieverts per hour was detected...

(Excerpt) Read more at english.kyodonews.jp ...


TOPICS: Breaking News; Extended News; Front Page News; Japan
KEYWORDS: heat; nuke; pullback; radiation
Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-80 ... 281-300 next last
To: blackdog
What coolants do not expand under high temperature? (they would have to also be mighty plentiful)

I wouldn't bother our local experts with that. Hillary Clinton is our country's expert on matters of nuclear coolant and shipping of same. And she is very relaxed now so don't worry.

/s

41 posted on 03/23/2011 2:00:09 PM PDT by Drill Thrawl (I don't prep for the disaster. I prepare for the rebuilding.)
[ Post Reply | Private Reply | To 32 | View Replies]

To: bvw

You’re really weird.


42 posted on 03/23/2011 2:00:45 PM PDT by Tolsti2
[ Post Reply | Private Reply | To 36 | View Replies]

To: GonzoGOP
Not if they used salt water to cool them. There is going to be scale all over everything in the reactor Bessel and nobody is going to crawl in there to scrape it off. Once you get salt water into a system like this it isn't coming back. And heck the things were due to be taken out of service in less than a year anyways. No reason to take the risk of restarting a possibly damaged reactor. Just finish the shutdown.

They have not, as far as I know, used salt water on 5 and 6. The backup diesel for unit 6 either survived the tsunami or was brought back on line shortly after so they were able to maintain normal circulation of cooling water on those units, at least at a modest level. Also, while the fuel storage pools got up to 65-70 C., once they got the backup generator for unit 5 back on line, they were able to provide full cooling capacity for both units and their spent fuel ponds.

I'll note that both units 5 and 6 are several hundred meters to the north of units 1 through 4, and probably were added to the plant beyond its original design. They are also the newest of the 6, and may have benefitted from improved design and construction methods.

As far as I know, only unit 1 was destined to be removed from service this year. It is the oldest of the units, having gone commercial in 1971, whereas units 5 and 6 went commercial in 1978 and 1979 respectively. Also, while 5 is similar to 2, 3, and 4 (BWR-4), unit 6 is a BWR-5.

43 posted on 03/23/2011 2:02:16 PM PDT by meyer (We will not sit down and shut up.)
[ Post Reply | Private Reply | To 31 | View Replies]

To: AwesomePossum

This nuclear crisis is spiraling out of control. The Japnese need to start entombnimg that plantb in concrete similar to Chernobyl.

I’m very disapoointed that the Japanese have let this thing drag on so long without a change in strategy. I hope that the loss of life is minimized.


44 posted on 03/23/2011 2:02:20 PM PDT by NRG1973
[ Post Reply | Private Reply | To 1 | View Replies]

To: mewykwistmas
You can be pro-nuclear power and be terrified of this

Of course you can.

You just can't claim to be a rational person AND be terrified of this.

Choose one.

45 posted on 03/23/2011 2:03:54 PM PDT by Balding_Eagle (Overproduction, one of the top five worries of the American Farmer each and every year..)
[ Post Reply | Private Reply | To 2 | View Replies]

To: Revel

Ever hit stainless steel with water when it’s hot? Welcome to the steel pretzel factory.


46 posted on 03/23/2011 2:04:16 PM PDT by blackdog
[ Post Reply | Private Reply | To 40 | View Replies]

To: Revel
The reason they can do that is because they are continuously venting.

I don't think they've vented the containment shells on 1 through 3 for the last couple of days. I think that the reactors are hot, but stable. It's the spent fuel pools that are of greater concern now.

47 posted on 03/23/2011 2:05:32 PM PDT by meyer (We will not sit down and shut up.)
[ Post Reply | Private Reply | To 40 | View Replies]

To: Revel
They are simply blasting water in and letting it run out into the environment. A continuing last effort attempt to prevent total meltdown. This prevents steam pressure buildup.

That sounds like a reasonable assumption based on reports but I'm wondering....

That is releasing a heck of a lot of radiation into the environment. Why not just let it go into meltdown, wait fives years to cool and then clean it up. The plants are toast anyway, it's not like there is anything to save at this point beyond reducing exterior contamination.

48 posted on 03/23/2011 2:05:49 PM PDT by Drill Thrawl (I don't prep for the disaster. I prepare for the rebuilding.)
[ Post Reply | Private Reply | To 40 | View Replies]

To: dfwgator
DUCK AND COVER!

That's if you see a nuclear flash. Don't look at the flash - it could blind you! Drop flat to the ground or behind any shelter that can b e taken instantly. Cover any exposed areas with anything that can limit burns from the intense light, or injury from flying debris. Stay covered for two minutes. Count the number of seconds from the flash to the blast wave arrival. If the blast does not arrive within two minutes, it will be considerably weaker. The number of seconds between the flash and the blast wave arrival divided by 5 gives a rough idea of your distance in miles from ground zero.

49 posted on 03/23/2011 2:06:24 PM PDT by Errant
[ Post Reply | Private Reply | To 35 | View Replies]

To: Tolsti2

Oh Genius! Oh Sage!

The King of the Chicken Little’s calls me weird.

Sadly, I have no budget for a framed certificate.


50 posted on 03/23/2011 2:06:37 PM PDT by bvw
[ Post Reply | Private Reply | To 42 | View Replies]

To: dfwgator

Just saying... If you live in the dfw area or any large city, you should already know this! :)


51 posted on 03/23/2011 2:08:20 PM PDT by Errant
[ Post Reply | Private Reply | To 49 | View Replies]

To: NRG1973

Book a ticket and roll up yer sleeves. Disappointment and the Japanese culture do not coexist. If this event took place on American soil, they would still be forming a committee to award contracts on authorized response teams only after they are SEIU approved.


52 posted on 03/23/2011 2:08:20 PM PDT by blackdog
[ Post Reply | Private Reply | To 44 | View Replies]

To: meyer
They have not, as far as I know, used salt water on 5 and 6. The backup diesel for unit 6 either survived the tsunami or was brought back on line shortly after so they were able to maintain normal circulation of cooling water on those units, at least at a modest level. Also, while the fuel storage pools got up to 65-70 C., once they got the backup generator for unit 5 back on line, they were able to provide full cooling capacity for both units and their spent fuel ponds.

Can you confirm that? If they had power on 5 & 6 why take a week to route power all the way from the outside world. Just rotate the power form plant to plant and use the batteries to keep the pumps going between hits off the diesel. I just can't see them letting things get as bad as they did last Tuesday, when the tops were actually being blown off the buildings, if they had power that close to hand.
53 posted on 03/23/2011 2:09:51 PM PDT by GonzoGOP (There are millions of paranoid people in the world and they are all out to get me.)
[ Post Reply | Private Reply | To 43 | View Replies]

To: Errant
LOL, They really started crawling out from under their computer desks as soon as things settled down a bit...

A bit more news like the above, and you'll hear crickets again.

Any rational person will be concerned about this kind of news, but there are A LOT of Freepers who owe the rest of us an apology.

You guys are making FR look like a bunch of Chicken Littles.

I'm telling you the sky is not falling, and there never was any danger of that happening.

You shouldn't let your emotions drvie you, that kind of stuff is for Liberals, not people who want to call themselves Freepers.

54 posted on 03/23/2011 2:10:19 PM PDT by Balding_Eagle (Overproduction, one of the top five worries of the American Farmer each and every year..)
[ Post Reply | Private Reply | To 11 | View Replies]

To: Selene

Good link. Interesting details about the various robots that are being requested by and sent to Japan. Glad to see iRobot Corp out of Massachusetts sending four. (I have a couple of their consumer Roomba robots. My dog hates! them!)


55 posted on 03/23/2011 2:10:23 PM PDT by lonevoice (Where the Welfare State is on the march, the Police State is not far behind)
[ Post Reply | Private Reply | To 29 | View Replies]

To: blackdog

Your experience is helpful, I am sure, but you understand these nuclear boilers are very heavy thick steel — I’m not up on the specs, but they are far more able to handle high pressures and thermal differentials than a typical commercial or residential stainless steel boiler.


56 posted on 03/23/2011 2:11:13 PM PDT by bvw
[ Post Reply | Private Reply | To 46 | View Replies]

To: GonzoGOP
Not if they used salt water to cool them.

Reactors 5 and 6 were further away and I don't believe salt water was used to cool them.

And heck the things were due to be taken out of service in less than a year anyways.

Prior to this disaster, the plant's operating certificate was renewed for another decade. They were not planning on decommissioning any reactors this year.

Reactors 5 and 6 were several years newer than 1-3, and another two reactors were scheduled to be built at the plant.

57 posted on 03/23/2011 2:11:25 PM PDT by Dan Nunn (Support the NRA!)
[ Post Reply | Private Reply | To 31 | View Replies]

To: Drill Thrawl

Hillary’s a real crotch cooler, but I had no idea!


58 posted on 03/23/2011 2:11:40 PM PDT by blackdog
[ Post Reply | Private Reply | To 41 | View Replies]

To: GonzoGOP

I’m not sure which low alloy steel is used in fabricating the reactor but it is not stainless steel. Yes, there are safety factors involved in the design and the operation of a nuclear power plant. For one thing the quality control requires mill certifications on the structural materials used in the construction. As on example, some of the steel may be an A36 spec. That means it will have a minimum tensile strength of 36,000 psi and ultimate tensile strength of 58,000–80,000 psi. The mill certification which documents the strength determined by the tests conducted on samples taken from the melt, is higher than 36,000. But 36,000 is what the safety factor is based on.

I don’t recall the ultimate but many of the mill certs we had for A36 was greater than 40,000 psi.


59 posted on 03/23/2011 2:11:50 PM PDT by meatloaf
[ Post Reply | Private Reply | To 21 | View Replies]

To: NRG1973
The Japnese need to start entombnimg that plant in concrete similar to Chernobyl.

That one is easy. Concrete holds in heat, and right now the problem is getting heat out. Right now they need to keep as much of that material where it is as they can, and that means keeping those containment vessels and fuel pools intact.
60 posted on 03/23/2011 2:12:57 PM PDT by GonzoGOP (There are millions of paranoid people in the world and they are all out to get me.)
[ Post Reply | Private Reply | To 44 | View Replies]


Navigation: use the links below to view more comments.
first previous 1-2021-4041-6061-80 ... 281-300 next last

Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.

Free Republic
Browse · Search
News/Activism
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson