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[Various] Japan Nuclear Emergency - Continuous Coverage of Damage and Radiation Risks - Page 63  

post #621 of 2836
Quote:
Originally Posted by damric;12712917 
1) I wish the news media would stop calling the fuel plates, fuel rods. There are control rods, made of hafnium. These are fully inserted to shut down the reactor, and are adjusted by the operator to control the fission reaction during operation (shim-in, shim-out).

2) If they mean that a single control rod is sticking out because it cannot insert due to structural damage, it's not such a big deal. Several of these control rods are designed to fail and still be able to fully shut down the reactor. Once the core gets flooded with boron-tetraflouride (a fission poison), it's going to take more than a few stuck rods to bring the reactor from a subcritical state.

3) If they mean that fuel plates are exposed at all (1m or 3m makes no difference), this bad, but not awful. Those fuel plates will likely melt due to decay heat (1000F causes damage if I recall). Of course, even if they melt down entirely, and end up in the bottom of the reactor vessel, they can not fission due to negative reactivity of control rods and poison. They are going to get submerged and cool off one way or another biggrin.gif


thinking.gif Hmm... So all of the current media drama is essentially over nothing, yes? If so, very good news. God I hate American news networks - they spew a continual stream of BS for all those willing to consume it (sadly many, many people).
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post #622 of 2836
Quote:
Originally Posted by SamuelL421;12712955 
thinking.gif Hmm... So all of the current media drama is essentially over nothing, yes? If so, very good news. God I hate American news networks - they spew a continual stream of BS for all those willing to consume it (sadly many, many people).

That's why a lot of people here are using BBC and Al-Jazeera (because regardless of what preconceived notions or whatever you might think about AJ, it is a good news source).
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post #623 of 2836
Quote:
Originally Posted by SamuelL421;12712955 
thinking.gif Hmm... So all of the current media drama is essentially over nothing, yes? If so, very good news. God I hate American news networks - they spew a continual stream of BS for all those willing to consume it (sadly many, many people).

Well there is still a possibility of radiation in the close vicinity of the plants but the fear of it having world wide effects is extremely unlikely. As already said the reactors are off, it is just cooling the excess heat that is the issue. At least thats what I am taking from all of this, still a lot of conflicting information as of yet.
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post #624 of 2836
Quote:
Originally Posted by kurt1288;12712970 
That's why a lot of people here are using BBC and Al-Jazeera (because regardless of what preconceived notions or whatever you might think about AJ, it is a good news source).

"but, but, but they are associated with terrorists!!"doh.gif
Edited by scyy - 3/13/11 at 12:00am
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post #625 of 2836
Quote:
Originally Posted by kurt1288;12712970 
That's why a lot of people here are using BBC and Al-Jazeera (because regardless of what preconceived notions or whatever you might think about AJ, it is a good news source).

I havent watch a single American news channel for information on the quake in japan, it has been all Aljeezera, and some BBC.

A HUGE thanks for Damric for his knowledge!!
    
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post #626 of 2836
I do watch cnn and other networks quite a bit. Honestly I have seen about 80% fear/hype on this subject. There were a few articles on cnn.com that were fairly factual. The intelligent person can usually figure out sensationalism. Unfortunately there's plenty of naive people out there in the general public, and plenty of people willing to make a dollar spreading sensationalism to them.

Like I said before, I never felt like my job as a reactor operator was dangerous. Our worst fear was a bad lube oil fire in the engine room, but we could evacuate and activate AFFF sprinklers or HALON if needed. My current job at the steel mill is way more dangerous, 99 ways to die in every direction I turn my head.

A very good cnn.com article with an excellent diagram of the reactor system. Unfortunately they misnomer it as a "boiling water" reactor, which it is not. The boiling occurs in the boiler, on the secondary loop side (see diagram). Boiling in the reactor itself would be bad, bad.

Edited by damric - 3/13/11 at 12:14am
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post #627 of 2836
Quote:
Originally Posted by damric;12713018 
I do watch cnn and other networks quite a bit. Honestly I have seen about 80% fear/hype on this subject. There were a few articles on cnn.com that were fairly factual. The intelligent person can usually figure out sensationalism. Unfortunately there's plenty of naive people out there in the general public.

Like I said before, I never felt like my job as a reactor operator was dangerous. Our worst fear was a bad lube oil fire in the engine room, but we could evacuate and activate AFFF sprinklers or HALON if needed. My current job at the steel mill is way more dangerous, 99 ways to die in every direction I turn my head.

So when you joined the navy you were able to enlist to work specifically with reactors? Or was there some luck that you were able to get that job and training?
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post #628 of 2836
Quote:
Originally Posted by damric;12713018 
I do watch cnn and other networks quite a bit. Honestly I have seen about 80% fear/hype on this subject. There were a few articles on cnn.com that were fairly factual. The intelligent person can usually figure out sensationalism. Unfortunately there's plenty of naive people out there in the general public.

Like I said before, I never felt like my job as a reactor operator was dangerous. Our worst fear was a bad lube oil fire in the engine room, but we could evacuate and activate AFFF sprinklers or HALON if needed. My current job at the steel mill is way more dangerous, 99 ways to die in every direction I turn my head.

i was prob exposed to more raditation in my job as a radar operator then you were working in a reactor room. No suppose to stand within 160 degrees of the front of the radar and we were in fox holes right infront of the radar with it on and no one realized it for 36 hours. We had 2 weeks of raditation tests. army acually takes that crap seriously. if i ever get cancer, it will be connected to my service with approval on the first try.
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post #629 of 2836
Quote:
Originally Posted by Blue Destroyer;12713055 
i was prob exposed to more raditation in my job as a radar operator then you were working in a reactor room. No suppose to stand within 160 degrees of the front of the radar and we were in fox holes right infront of the radar with it on and no one realized it for 36 hours. We had 2 weeks of raditation tests. army acually takes that crap seriously. if i ever get cancer, it will be connected to my service with approval on the first try.

100% agree. I probably didn't get half a REM total from all the time I spent working around that stuff, including working inside the reactor compartment during maintenance shutdowns. We tracked our exposure with some pretty cool dosimetry devices.
Quote:
Originally Posted by scyy;12713041 
So when you joined the navy you were able to enlist to work specifically with reactors? Or was there some luck that you were able to get that job and training?

You choose, but you must qualify. Talk to a recruiter. They will need you to take the ASVAB, and the NFQT. These are tests that measure your ability to learn new things, and determine if you have certain aptitude areas. I was lucky and scored high enough to qualify for Nuclear Machinist Mate, Nuclear Electrician, or Nuclear Electronics technician. I chose nuke-ET, because they are the ones that get to shim rods just like Homer Simpson biggrin.gif If you already have a degree, there's also Nuke officers, and boy do they get paid.
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post #630 of 2836
Thank you, Damric for your informative posts. +1rep
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