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Thread: Japan Hit By Tsunami

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    Quote Originally Posted by Nemesis View Post
    hey Aco, i always thought a SCRAM would instantly stop a meltdown from happening, is it because what my knowledge is based off of is nuc subs instead of giant reactors? and also, by SCRAMing it with the raw sea water, it'll be totally destroyed, right? as in that is a last ditch effort, once you expose it to sea water you'll never be able to use it again...yes?
    meltdown does not mean explosion. that's called an explosion. meltdown means just that; the radioactive fuel becomes so hot they actually melt/burn through their containment structure (literally 'melting down') SCRAMing isn't done to reduce heat (though often they'll perform those opperations in conjunction) it's designed to halt the fission taking place. it's done by lowering the control rods into the core in the fastest possible manner. depending on the method of SCRAM used, reactors could be started up easily, or with very much difficulty. the most common SCRAM involves shoving the control rods all the way into the core at one time, halting fission completely. backups for this (and possible primary systems, but i hope not) amount to basically dumping buckets of neutron-absorbing material into the core.

    since water (even ion-rich sea-water) doesn't attenuate radiation very well, SCRAMing w/ seawater is not feasible. what they were probably doing, was pumping seawater into the coolant pipes to keep temperatures down while they fixe the main coolant system
    Quote Originally Posted by OMGBEARS
    I feel it is important for me to let you know how feeble your efforts to strike such feelings inside of me really are. I have the internal fortitude of a large animal, an elephant, for instance. Likewise, I'm the result of coitus between the devil and a pack mule made out of chainsaws, so I am extremely strong, and carry little care for others in this world. Trees also stand aside due to my chainsaw blood.
    Quote Originally Posted by ๖ReS View Post
    How am I supposed to tell you to fuck off without replying ?

  2. Default

    ah, well thank you. and the whole sea water thing is what i know of from nuc subs. bvasically if there's no other way to stop it from melting down they just open up the reactor to sea water, it fries everything but at least it wont destroy the sub. i assumed it worked the same way here.
    Quote Originally Posted by maynard View Post
    Nem, if you want to make racist jokes and shit all the time, fine.
    http://www.myconfinedspace.com/2010/07/02/nemesis/nemesis-jpg/

  3. Default

    Quote Originally Posted by Nemesis View Post
    ah, well thank you. and the whole sea water thing is what i know of from nuc subs. bvasically if there's no other way to stop it from melting down they just open up the reactor to sea water, it fries everything but at least it wont destroy the sub. i assumed it worked the same way here.
    yeah, that sounds like an emergency heat fix. it probably just requires a thorough cleaning, since seawater is not the purest stuff, and the boiling of it all will lead to alot of stuff building up on the inside of the core
    Quote Originally Posted by OMGBEARS
    I feel it is important for me to let you know how feeble your efforts to strike such feelings inside of me really are. I have the internal fortitude of a large animal, an elephant, for instance. Likewise, I'm the result of coitus between the devil and a pack mule made out of chainsaws, so I am extremely strong, and carry little care for others in this world. Trees also stand aside due to my chainsaw blood.
    Quote Originally Posted by ๖ReS View Post
    How am I supposed to tell you to fuck off without replying ?

  4. Default

    Quote Originally Posted by acolyte_to_jippity View Post
    meltdown does not mean explosion. that's called an explosion. meltdown means just that; the radioactive fuel becomes so hot they actually melt/burn through their containment structure (literally 'melting down') SCRAMing isn't done to reduce heat (though often they'll perform those opperations in conjunction) it's designed to halt the fission taking place. it's done by lowering the control rods into the core in the fastest possible manner. depending on the method of SCRAM used, reactors could be started up easily, or with very much difficulty. the most common SCRAM involves shoving the control rods all the way into the core at one time, halting fission completely. backups for this (and possible primary systems, but i hope not) amount to basically dumping buckets of neutron-absorbing material into the core.

    since water (even ion-rich sea-water) doesn't attenuate radiation very well, SCRAMing w/ seawater is not feasible. what they were probably doing, was pumping seawater into the coolant pipes to keep temperatures down while they fixe the main coolant system
    Then what exactly happened at Chernobyl, is it the same thing Japan is experiencing.
    Last edited by Holy-Sonic; 03-26-2011 at 12:54 AM.
    Who are you? oh thats right your the shit talker... I'm sorry, I couldn't hear you over how AWESOME I am.
    Sonic logs back into steam: 9/11/10

  5. Default

    Quote Originally Posted by Holy-Sonic View Post
    Then what exactly happened at Chernobyl, is it the same thing Japan is experiencing.
    no. chernobyl had NO containment. japan is far, FAR better than chernobyl.
    Quote Originally Posted by OMGBEARS
    I feel it is important for me to let you know how feeble your efforts to strike such feelings inside of me really are. I have the internal fortitude of a large animal, an elephant, for instance. Likewise, I'm the result of coitus between the devil and a pack mule made out of chainsaws, so I am extremely strong, and carry little care for others in this world. Trees also stand aside due to my chainsaw blood.
    Quote Originally Posted by ๖ReS View Post
    How am I supposed to tell you to fuck off without replying ?

  6. Default

    japan looks like a zoo with free cotton candy (blue flavor not pink) compared 2 what Chernobyl was lol

    Maynard - The WCS Guy

  7. Default

    i think it also has a lot to do with the majority of them being genuinely good people.

    "if the futures been drawn out theres no point in living." sksk
    Quote Originally Posted by acolyte_to_jippity View Post
    within the ruins remins me of a somewhat harder bullet for my valentine

  8. Default

    lol Chernobyl is still a wasteland.

  9. Default

    The level of the explosion of the reactor in Chernobyl doesn't compare to Japan. That reactor exploded and it was done. Smoke and fire from the explosion released deadly levels of fallout in the air. A Level 7 (the worse possible) when it comes to contamination. Japan is lucky in a sense because they already had water in their plant. Even if it's salt water, it's still dense enough to slow down any potentially hazardous contamination. Chernobyl was a little late in executing that idea. Of the three core meltdowns, their highest level of contamination is a 5, and still the radiation isn't severe enough to cause worry as much as Chernobyl did.

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