Any "Latest & Greatest" about Delta?
05-16-2011, 05:47 PM
Gets Weekends Off
Joined APC: Feb 2007
Position: 765-A
Posts: 6,844
Originally Posted by forgot to bid
Speaking of American ingenuity...
Is this a case of me thinking my airplane is bigger than it really is?
05-16-2011, 05:50 PM
Happy to be here
Joined APC: Jun 2006
Position: A-320A
Posts: 18,563
Originally Posted by Jughead
Really? That's a rule? A rule.
I don't view that as a real rule.
I don't view that as a real rule.
On some level I get it. You get a mechanic up there, and they start tearing though things, a few pages could get lost.
05-16-2011, 06:05 PM
Inventory survival kit ..
Joined APC: Jul 2008
Position: Seeking no jacket required rotations
Posts: 1,069
For you nuclear types
Fukushima Reactor 1 melted down, 2 and 3 may have too
By John Timmer
Yesterday, TEPCO, the company responsible for running the Fukushima nuclear reactors, released a provisional analysis of the events that occurred in Unit 1, one of the reactors that was active when the tsunami struck. In five stark pages, the report lays out the impact of the tsunami on the facility: water levels that plunged below the bottom of the fuel, a complete meltdown of the nuclear fuel, and extensive damage to the reactor vessel.
The new analysis was enabled by the recent installation of air purifiers that let personnel reenter the reactor control room for the first time. Once inside, they were able to recalibrate some of the instruments that have been monitoring the reactor core; the revised numbers have enabled TEPCO to better understand what happened in the wake of the tsunami.
Things moved fairly quickly: by four hours after the tsunami hit, the levels of cooling water had dropped enough that the top of the fuel stack was exposed to the air. Shortly after that happened, the temperature in the core reached nearly 3,000°C, and the cooling water boiled off the bottom of the fuel stack. Melting of fuel rods started at 4.8 hours after the earthquake hit, and a partial meltdown had already occurred by 5.1 hours. According to TEPCO, any residual integrity in the fuel rods was gone by 15 hours after the quake, and the reactor core was emptied of fuel by 16 hours.
If there's a bright side here, it's that, by melting to the floor of the reactor, most of the fuel was resubmerged in cooling water. Temperatures there are now in the area of 100-120°C. The temperatures still fluctuate based on the rate of cooling water injection, suggesting the majority of the fuel is still inside the reactor vessel. The temperature and pressure readings indicate that the vessel is generally intact, as well. But the continued loss of cooling water indicates that it almost certainly has been leaking water that is heavily contaminated with radioactive isotopes (though not necessarily reactor fuel).
As Nature's Geoff Brumfiel puts it, "Nobody really knows where all the water is going—but it can't be anywhere good." The best hope is that it largely leaked into the basement areas of the reactor building but we currently don't know for certain where the water escaped to or how far it has spread. Complicating matters further are reports that TEPCO thinks that the two other reactors that were active at the time of the quake suffered similar damage. Confirmation will have to wait for access to their control rooms.
All of this will make the cleanup efforts extraordinarily complex, as the fuel can no longer be lifted out using the structure it was incorporated into, since all that supporting material has melted away. Workers will also have to contend with leaks of highly radioactive water during the process; that water will have to be removed or contained before it leaches into the surrounding soil. There are positives here—temperatures are relatively low now, and the fuel appears to have remained in the reactor vessel—but Fukushima is likely to be a long-term worry.
TEPCO Report here http://www.tepco.co.jp/en/press/corp.../110515e10.pdf
Fukushima Reactor 1 melted down, 2 and 3 may have too
By John Timmer
Yesterday, TEPCO, the company responsible for running the Fukushima nuclear reactors, released a provisional analysis of the events that occurred in Unit 1, one of the reactors that was active when the tsunami struck. In five stark pages, the report lays out the impact of the tsunami on the facility: water levels that plunged below the bottom of the fuel, a complete meltdown of the nuclear fuel, and extensive damage to the reactor vessel.
The new analysis was enabled by the recent installation of air purifiers that let personnel reenter the reactor control room for the first time. Once inside, they were able to recalibrate some of the instruments that have been monitoring the reactor core; the revised numbers have enabled TEPCO to better understand what happened in the wake of the tsunami.
Things moved fairly quickly: by four hours after the tsunami hit, the levels of cooling water had dropped enough that the top of the fuel stack was exposed to the air. Shortly after that happened, the temperature in the core reached nearly 3,000°C, and the cooling water boiled off the bottom of the fuel stack. Melting of fuel rods started at 4.8 hours after the earthquake hit, and a partial meltdown had already occurred by 5.1 hours. According to TEPCO, any residual integrity in the fuel rods was gone by 15 hours after the quake, and the reactor core was emptied of fuel by 16 hours.
If there's a bright side here, it's that, by melting to the floor of the reactor, most of the fuel was resubmerged in cooling water. Temperatures there are now in the area of 100-120°C. The temperatures still fluctuate based on the rate of cooling water injection, suggesting the majority of the fuel is still inside the reactor vessel. The temperature and pressure readings indicate that the vessel is generally intact, as well. But the continued loss of cooling water indicates that it almost certainly has been leaking water that is heavily contaminated with radioactive isotopes (though not necessarily reactor fuel).
As Nature's Geoff Brumfiel puts it, "Nobody really knows where all the water is going—but it can't be anywhere good." The best hope is that it largely leaked into the basement areas of the reactor building but we currently don't know for certain where the water escaped to or how far it has spread. Complicating matters further are reports that TEPCO thinks that the two other reactors that were active at the time of the quake suffered similar damage. Confirmation will have to wait for access to their control rooms.
All of this will make the cleanup efforts extraordinarily complex, as the fuel can no longer be lifted out using the structure it was incorporated into, since all that supporting material has melted away. Workers will also have to contend with leaks of highly radioactive water during the process; that water will have to be removed or contained before it leaches into the surrounding soil. There are positives here—temperatures are relatively low now, and the fuel appears to have remained in the reactor vessel—but Fukushima is likely to be a long-term worry.
TEPCO Report here http://www.tepco.co.jp/en/press/corp.../110515e10.pdf
05-16-2011, 06:29 PM
Happy to be here
Joined APC: Jun 2006
Position: A-320A
Posts: 18,563
Nosmo;
I read that article too. From the live readings in and around Tokyo, they are looking at 8 micro s/a an versus the normal of four. Still well in to the safe level. I hope it stays that way as I am in and out of Tokyo a lot.
I read that article too. From the live readings in and around Tokyo, they are looking at 8 micro s/a an versus the normal of four. Still well in to the safe level. I hope it stays that way as I am in and out of Tokyo a lot.
05-16-2011, 06:34 PM
Gets Weekends Off
Joined APC: Apr 2007
Position: Flying the SEC
Posts: 2,350
Sort of disproves the China Syndrome theory.
05-16-2011, 06:40 PM
veut gagner à la loterie
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Position: Light Chop
Posts: 23,286
Originally Posted by newKnow
I think everyone is referring to this as an -88. But, it looks like a DC-9 to me.
Is this a case of me thinking my airplane is bigger than it really is?
Is this a case of me thinking my airplane is bigger than it really is?
Not as good as a MD-90 personified, but seriously, what is?
05-16-2011, 07:13 PM
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Position: Light Chop
Posts: 23,286
Originally Posted by Nosmo King
From DeltaNet
Flight data successfully extracted from Air France black boxes
May 16, 2011
Investigators analyzing the wreckage of Air France Flight 447 successfully extracted data from the black boxes on Monday, including all information from the flight data recorder and a loop containing the last two hours of cockpit voice recordings, Reuters reported.
The digital chips and memory cards inside the flight-data and cockpit-voice recorders discovered recently under roughly 12,000 feet of water were found to be in good condition with scant evidence of salt water corrosion, said earlier reports.
The data will now be analyzed in detail, and it will take several weeks before an interim report is written and published this summer, France's BEA air investigation agency said in a statement.
Air France Flight 447 disappeared June 2009 while flying through heavy storms from Rio de Janeiro to Paris.
More detailed story here http://www.nytimes.com/2011/05/17/wo...ef=global-home
Flight data successfully extracted from Air France black boxes
May 16, 2011
Investigators analyzing the wreckage of Air France Flight 447 successfully extracted data from the black boxes on Monday, including all information from the flight data recorder and a loop containing the last two hours of cockpit voice recordings, Reuters reported.
The digital chips and memory cards inside the flight-data and cockpit-voice recorders discovered recently under roughly 12,000 feet of water were found to be in good condition with scant evidence of salt water corrosion, said earlier reports.
The data will now be analyzed in detail, and it will take several weeks before an interim report is written and published this summer, France's BEA air investigation agency said in a statement.
Air France Flight 447 disappeared June 2009 while flying through heavy storms from Rio de Janeiro to Paris.
More detailed story here http://www.nytimes.com/2011/05/17/wo...ef=global-home
05-16-2011, 07:19 PM
At home on the maddog!
Joined APC: Mar 2009
Position: ATL MD-88A
Posts: 2,874
Originally Posted by newKnow
I think everyone is referring to this as an -88. But, it looks like a DC-9 to me.
Is this a case of me thinking my airplane is bigger than it really is?
Is this a case of me thinking my airplane is bigger than it really is?
05-16-2011, 07:29 PM
Gets Weekends Off
Joined APC: Feb 2007
Position: 765-A
Posts: 6,844
Originally Posted by forgot to bid
That's a DC-9-50.
Not as good as a MD-90 personified, but seriously, what is?
Not as good as a MD-90 personified, but seriously, what is?
Originally Posted by DAL 88 Driver
Yep, it's a DC9-50. No "flat head screwdriver" tail cone. No engine nacelle strakes. Other than that, it would be hard to tell from that particular pic. Hey, it fooled Jughead!
I didn't know about the engine nacelle strakes on the -88 though.
That is a great picture of the -9.
05-16-2011, 07:59 PM
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Posts: 23,286
Originally Posted by newKnow
I thought so. I always look for the flat vs. round tailcone. But, in the picture it's kind of hidden, no matter which angle I turn my head.
I didn't know about the engine nacelle strakes on the -88 though.
That is a great picture of the -9.
I didn't know about the engine nacelle strakes on the -88 though.
That is a great picture of the -9.
All sizes | Delta Air Lines McDonnell Douglas DC-9-51 in HDR | Flickr - Photo Sharing!
For NewK
For Jughead and the rest of the Fly DC Jets Choir:
And the Boeing guys:
Sorry, you don't see an airplane in the pic, I'm just showing a "keep reaching for that rainbow" pic to convey the required seniority to hold a Boeing jet with any good QOL. [green big smile smilie here]
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