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Sagebrush posted:seriously what the gently caress harper. canada used to have some of the world's best nuclear scientists, aerospace engineers, roboticists, and other high tech industry. all those scottish immigrants don't ya know (scots have always been the world's best engineers). thanks a lot for defunding basic research in favor of ripping poo poo out of the ground you huge rear end in a top hat harper is a cancer and should be treated as such
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Dec 19, 2014 03:48
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Mido posted:*skips maintenance because lol money, turbine spins itself out of control during a heavy wind and the brakes fail, turbine explodes into pieces from sheer force* oh god it's spilling wind everywhere 
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Dec 19, 2014 04:26
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Pinterest Mom posted:Carly Fiorina is laying the groundwork for what one ally says is an "imminent" presidential campaign—one that could launch as early as next month. hahahahahahhahHahahahahahaha holy hell who besides c fiorina wants c fiorina to run?
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Dec 19, 2014 04:28
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everyone who wants to see more completely transparent and insane political ads that run for 20 minutes
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Dec 19, 2014 04:29
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this is carly "spent more money than all other candidates combined and got 0.1% of the vote or something" fiorina right?
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Dec 19, 2014 04:31
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the tidal stuff seems really cool ignoring environmental impact, the notion of just getting free juice from 100 square km of water rising and falling is p neat
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Dec 19, 2014 04:38
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Jonny 290 posted:the tidal stuff seems really cool harvesting the power of the moon is pretty badass tbh
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Dec 19, 2014 04:47
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Sagebrush posted:this is carly "spent more money than all other candidates combined and got 0.1% of the vote or something" fiorina right? carly "the market valued me at negative ten billion dollars" fiorina
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Dec 19, 2014 04:51
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I mentioned that carly was going into politics to my boss, a ten year veteran of hp during the 80s/90s. I thought he was going to die laughing
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Dec 19, 2014 05:34
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who would be compaq to america? can she buy russia?
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Dec 19, 2014 05:37
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canada we can also spin off Quebec at the same time
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Dec 19, 2014 05:40
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Elder Postsman posted:carly "the market valued me at negative ten billion dollars" fiorina ahahaha
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Dec 19, 2014 05:41
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Elder Postsman posted:carly "the market valued me at negative ten billion dollars" fiorina "well yeah but it's a signed 32 bit int so we're actually worth positive 1.4 billion once you do the math"
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Dec 19, 2014 05:49
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If she was in charge of canada then she'd spin off quebec and then destroy all the oil fields and introduce sharia law
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Dec 19, 2014 05:59
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Jonny 290 posted:"well yeah but it's a signed 32 bit int so we're actually worth positive 1.4 billion once you do the math" this literally makes more sense than carly fiorina running for president Jonny 290 posted:the tidal stuff seems really cool it's a cool concept but the engineering is a huge problem. the sea is a colossal bitch that none-too-slowly destroys whatever we put into it.
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Dec 19, 2014 06:02
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Wild EEPROM posted:If she was in charge of canada then she'd spin off quebec and then destroy all the oil fields and introduce sharia law id vote for this
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Dec 19, 2014 06:03
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Elder Postsman posted:carly "the market valued me at negative ten billion dollars" fiorina this never gets old
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Dec 19, 2014 06:04
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Farmer Crack-rear end posted:the sea is a colossal bitch that none-too-slowly destroys whatever we put into it. as a professional mariner I'd like to clarify and expand on the above. what he said, except way worst.
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Dec 19, 2014 06:04
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Citizen Tayne posted:you're quite the dish! thx op
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Dec 19, 2014 06:08
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i thought chernobyl was a candu reactor and that was some old-rear end poo poo we don't use anymore guess i'd better hit up the
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Dec 19, 2014 06:36
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Mr Dog posted:i thought chernobyl was a candu reactor and that was some old-rear end poo poo we don't use anymore lol VLADIMIR GLUTEN posted:i loving love CANDU's so much fuckin' ace. i hope you like SNC Lavalin too, because they own the CANDU design now. yes, we loving gave it to them. also, i vaguely know one of the lead engineers from the original CANDU project. several years ago my boss at the time managed to destroy the digital manuscript for his memoirs, i was tasked with recovering it.
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Dec 19, 2014 06:45
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nah chernobyl was a light-water reactor. it's not a suicidally unsafe design but it has several really serious failure modes, one of which was demonstrated in the accident basically in a reactor you always try to keep the right number of neutrons in the core going the right speed. neutrons generated by fission reactions initiate more fission reactions, so more of them means faster reactions. however slower-moving neutrons ("moderated" ones) are much better at starting reactions than fast neutrons, so you also generally want to slow them down in order to make your reactor more efficient. it's this constant balance between moderation and absorption that makes up control of the reaction. in something like a candu, the reactor is full of heavy water. heavy water is an effective neutron moderator, so it increases the efficiency of the reaction. if the reactor were to overheat due to some failure in another part of the system, the heavy water would boil away, reducing the amount of it available for moderation, so the neutrons would speed up, the reaction efficiency goes down, and the reactor cools off. you lost millions of dollars worth of heavy water but you prevented a meltdown. so anyway the chernobyl reactor used solid graphite as a moderator and also ran light water through the core as coolant. light water is also an effective neutron absorber (research reactors in universities often have no more shielding than being placed in a 30 foot deep pool of water, and you can stand above and look down at the core completely safely). so normally you have fast neutrons slowing down in the graphite and then some are being absorbed by the water, balancing the reaction. well when it overheats think of what happens: the water boils away, creating steam voids that no longer serve any real absorption function,, while the graphite stays right where it is making the neutrons more effective. oh dear
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Dec 19, 2014 06:54
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yeah it turns out graphite burns
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Dec 19, 2014 06:58
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chernobyl also had another mechanical problem which was with the control rods. normally to stop a reaction you can lower these rods made of boron or some other powerful neutron absorber into the core, and they soak up the neutrons and effectively stop the reaction. in the chernobyl design the rods had a couple feet of non-absorbent material at the lower end, so when they started to put the rods in to shut the reactor down, initially they just displaced water and made the reaction even faster. the whole thing blew up before the rods even got into the core iirc besides the void coefficient thing (the effect of steam bubbles in the core), modern reactors have safety features like "control rods that don't have that dumbass feature on the end", rods that can be dropped or fired into the center of the reactor in fractions of a second instead of tens, and the ability to flood the whole thing with liquid or gaseous neutron poisons that will stop the reaction instantly, damaging the core in the process and requiring recommissioning but at least preventing a total disaster.
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Dec 19, 2014 07:00
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infernal machines posted:yeah it turns out graphite burns well yeah that's a whole other thing that happens afterwards. zirconium and uranium will also burn quite nicely at the temperatures you get in a reactor power excursion tho and that's what most fuel bundles are made of. gotta keep the air out and chernobyl originally had that, with some kind of helium system irrc, but it broke when the reactor exploded.
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Dec 19, 2014 07:01
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Sagebrush posted:so anyway the chernobyl reactor used solid graphite as a moderator and also ran light water through the core as coolant. light water is also an effective neutron absorber (research reactors in universities often have no more shielding than being placed in a 30 foot deep pool of water, and you can stand above and look down at the core completely safely). so normally you have fast neutrons slowing down in the graphite and then some are being absorbed by the water, balancing the reaction. wouldn't that make the water radioactive 
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Dec 19, 2014 07:02
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in the time you took to post all that i was off on a tangent reading about steam turbines instead i wish i was less ignorant 
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Dec 19, 2014 07:02
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Avenging Dentist posted:my preferred alternative to nuclear is "nuclear without the regulatory capture" also because it was already scheduled to have the two oldest reactors fully replaced in 2013 and 2014 respectively
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Dec 19, 2014 07:02
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not as much as you'd think. in a commercial reactor it's treated as low level waste, don't know what they do with it in the pool reactors in universities. i wouldn't swim in it but apparently you actually could without any danger as long as you stayed more than ~10 feet? from the reactor core at the bottom. water does a really good job stopping radiation. if they're gonna bomb your city, go to the local aquarium
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Dec 19, 2014 07:04
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 survived the nazi occupation of ukraine. then this big loving power plant near her cottage blew up. she still lives there.  72 year old woman that is not afraid of radiation because "it does not bite!"  86 years old and sneaks through a hole in a fence to get the good mushrooms. ducks into a bush when the cops patrol by.  this is the most russian woman in the world. when the power plant blew up, she tried to hide herself and her cow in the basement but got evacuated. she came back. http://www.telegraph.co.uk/news/earth/environment/9646437/The-women-living-in-Chernobyls-toxic-wasteland.html
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Dec 19, 2014 07:08
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infernal machines posted:i hope you like SNC Lavalin too, because they own the CANDU design now. yes, we loving gave it to them. this im not such a big fan of
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Dec 19, 2014 07:08
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it's amazing to me that nuke plants just end up boiling water in order to produce electricity like some kinda steampunk bullshit made of brass and virginity
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Dec 19, 2014 07:10
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H.P. Hovercraft posted:it's amazing to me that nuke plants just end up boiling water in order to produce electricity like some kinda steampunk bullshit made of brass and virginity i think some of them gently caress around with sodium and stuff, but yeah. specifically pressurized water reactors freak me out
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Dec 19, 2014 07:12
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fritz posted:there are a couple former olpc people at current job, they're good people they are i bought an OLPC for myself and for a friend because of the weird and interesting "sugar" timeline/activity-oriented UI and the mesh networking thing then whoops ms is a sponsor, it's all going to be windows soon, and we're not going to do anything interesting with the sugar UI anyway, suckers! now my eMate 300 is more interesting
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Dec 19, 2014 07:12
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eschaton posted:they are, and i bought an OLPC for myself and for a friend because of the weird and interesting "sugar" timeline/activity-oriented UI and the mesh networking thing sugar ui was a solution to a problem that doesn't exist. slightly worse actually, since the primary value of cheap educational computers in these places is teaching practical computer skills it's neat in a ui concept way, but practically useless
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Dec 19, 2014 07:16
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it's more amazing to me that a modern gas turbine-generator set can turn better than 60% of the heat energy in the steam into electrical power, entirely mechanically
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Dec 19, 2014 07:16
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eschaton posted:they are dude microsoft became a sponsor because all the developing countries demanded to have a real operating system so that their kids and adults could get training in the operating systems developed countries use. the whole "lets use linux!!!" thing was hated by the african countries especially. and since microsof thad to issue licenses they became a "sponsor" because they granted free licenses for all the olpcs going to the third world
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Dec 19, 2014 07:25
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Sagebrush posted:it's more amazing to me that a modern gas turbine-generator set can turn better than 60% of the heat energy in the steam into electrical power, entirely mechanically holky hell
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Dec 19, 2014 07:27
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Jonny 290 posted:i think some of them gently caress around with sodium and stuff, but yeah. specifically pressurized water reactors freak me out even the sodium ones boil water to spin a turbine tho
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Dec 19, 2014 07:46
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just imagine the existential question posed by working in a facility with a turbine with molten sodium flowing through it at 2000 degrees and twice the speed of sound
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Dec 19, 2014 07:52
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