Nuclear Reactor Pulse
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- čas přidán 14. 05. 2009
- The Engineers at the Nuclear Engineering Teaching Lab (NETL) at UT Austin demonstrate a reactor pulse.
All the Control Rods are removed simultaneously allowing the nuclear reaction to proceed un-dampened, bringing the energy output of the reactor to 680 Megawatts in 50 milliseconds.
Video produced by Juan Diaz at the Faculty Innovation Center
the guy counting sounds like he just loves the thrill of his job lol
@Anon Wibble It's only light
@@paulanderson79 Just 3.6 roen-- awww shit I can't do this anymore....
5....4.....bleh.....murrrg....zzzzzzz.
Makes it creepier
@@paulanderson79 spicy light
I love how the glow is volumetric and doesn't cast any shadows. It looks unbelievable and unnatural.
The light is caused by Cherenkov radiation. Charged particles are traveling through the water faster than light can pass through it. As they travel, they polarize the water, which emits light as it returns to its normal state (which is the blue you see).
fake news
@@JohnDoe-dj4rl lol
Thanks for the story, Cliff! We are all much more stupid now for it, so yeah, thanks!
Yeap is the most satanic blue of the planet.
@@JohnDoe-dj4rl morrons
I love the guy counting down... Fiive, Forwar, theree, tewew, waan, fiire.
Our rejection of Nuclear power was a massive mistake, and the environment has payed dearly for it as we continue to rely on fossil fuels for our electricity
That's my voice on the video. We are performing a reactor pulse which is unique and safe on the TRIGA type research reactor. The reactor normally operates at 1 Megawatt but for the pulse the power spiked to around 800 Megawatts for a fraction of a second. The rapid rise in power cause the reactor to shutdown. The large sound you hear at the beginning is the pneumatic control rod that is ejected in 0.5 second and causes the reactor power spike. Enjoy.
Is it a boy or girl just asking
You have the perfect ominous-sounding voice for this(SHUDDER)!
For a few seconds there in the beginning, i thought shitty flash player crapped out
even in August 2015, you where still using Flash player?
CZcams uses HTML5 now not flash player
If you pause at 0:11 at just the right frame, it's just wow. It might take a few tries but it's amazing. :)
got it
Damn that's bright!
I was trying this sitting too close to the screen and almost shat myself when video accidentally gone fullscreen at the moment. shit
Hello, new wallpaper
You mean this? i.gyazo.com/00f7512b726690f843f16ce550b536aa.jpg
"alright that was cool"
0:16
He wasn't wrong about that :D
Its actually kind of beautiful...
@Fred C. Scroll It's only a nuclear research reactor. Nothing to fear.
It's eerie in way. Kind of feels like you shouldn't be able to see this and live.
@@steirabua861 just don’t swim down too far lol
Yeah, wail till you touch the core
My grandma did the same s hit back in 1974 with camera flash bulbs. To this day I can't see outta my left eye!!! Love you Granny
So epic. That flash is the signifier of some ker-azzzzzy shit happening. Incomprehensible
+Mata-Metal Desu Actually it's Cerenkov radiation. It occurs when, due to differences in the refractive index of light photons vs. electrons, the electrons move faster than the speed of light in the medium in question, in this case apparently water. You may have heard "Nothing can move faster than the speed of light" which isn't quite true. The reality is, "Nothing can move faster than the speed of light *in a vacuum*." In a medium like water, electrons can actually move faster than light which results in the production of this pale blue Cerenkov radiation.
+David Stratton Mass comprehends the limits of light :)
+David Stratton While electrodynamics holds that the speed of light in a vacuum is a universal constant (c), the speed at which light propagates in a material may be significantly less than c. For example, the speed of the propagation of light in water is only 0.75c. Matter can be accelerated beyond this speed (although still to less than c) during nuclear reactions and in particle accelerators. Cherenkov radiation results when a charged particle, most commonly an electron, travels through a dielectric (electrically polarizable) medium with a speed greater than that at which light propagates in the same medium.
Moreover, the velocity that must be exceeded is the phase velocity of light rather than the group velocity of light. The phase velocity can be altered dramatically by employing a periodic medium, and in that case one can even achieve Cherenkov radiation with no minimum particle velocity, a phenomenon known as the Smith-Purcell effect. In a more complex periodic medium, such as a photonic crystal, one can also obtain a variety of other anomalous Cherenkov effects, such as radiation in a backwards direction (whereas ordinary Cherenkov radiation forms an acute angle with the particle velocity).
+Colgateras
Straight from wikipedia................
+Colgateras that's all well in good but can you now try say that In simple terms with using wiki.
Fooking amazing! Do it again!
I did not know u could actually see this happen to a reactor... Thought it was all inside something you could not see into. Really interesting stuff.
Thanks for posting this :)
Basically when the radiation his the water around the reactor it's "Breaking the light Barrier" so to speak and the water around it is being stimulated to emit the blue light as it "freaks out" then tries to dissipate the extra absorbed energy, Since we're made of approximate 70% (give or take) water we would probably glow too... before the radiation burns did lethal amounts of nasty to us on a cellular level, yay for fun terrifying factoids... about 8 years after you poster your comment... lol
Radiation creeps me out
It's not necessary. Be cool.
DSoTM Nuclear reactors have less chance of going wrong than an airplane. It's just when it does go wrong it goes REALLY wrong :P
Kameron Ashley Do you eat bananas?
Kameron Ashley Radiation is the reason you have eyeballs. Yo welcome.
Kameron Ashley I know what you mean, it really gets under my skin....
Idk why i feel chills when seeing these blue lights it scares me so much
They aren’t lights, it’s radiation
Behold Atom's power and glow
The radiant blue glow purifies my soul.
And the atomic bonds in your DNA :)
this is one of the most beautiful blues I've ever seen.
Fantastic!
DU does radiate - alpha particles, very slowly, at very low intensity. Yes, it's toxic, just about equivalent to arsenic, which is, indeed, worse than lead.
utterly fascinating....
its so cool to think that happens FASTER then light, one of very few ways we can achieve ftl speeds
"The beautiful glow..."
@UTFIC "rescued quickly" is the key phrase there people. LOL
To quote wikipedia: "The actual level of acute and Chronic toxicity of DU is also a point of medical controversy. Several studies using cultured cells and laboratory rodents suggest the possibility of leukemogenic, genetic, reproductive, and neurological effects from chronic exposure."
Still doesn't sound like stuff we should pile up everywhere because we 'might be able to use it' someday...
@bryanunderoath, Yeah your right is called the moderator, its either light , or more probably heavy water but its there to slow down neutrons to stop a runaway reaction
@gigiboxa That's called Cherenkov Radiation. It results from radiation moving faster than the speed of light through water. Note that the radiation is still moving more slowly than light would in a vacuum, but in water, light is slowed down. Very cool stuff.
wow this is very cool
haha by far the best you tube "argument" ever. i learned something from it haha
Forbidden jacuzzi
While this may contain heavy water as a moderator for the reactor, the deuterium oxide is not radioactive itself. If a deuterium nucleus captures a second neutron and become tritium, then that will be radioactive. Lithium is not involved, unless this is actually a fusion bomb, where lithium is violently fissioned to produce deuterium and tritium.
Thrilling
It's the _final countdown._
@dachhh The only prompt critical reactor that I'm aware of were the Godiva 1 and Godiva 2 devices; constructed by the DoE to create bursts of radiation. They used disks of weapons-grade uranium with a vertical hole through the center. A rod was dropped through the hole, taking the assembly prompt critical for a brief moment. The HEU disks are moved apart automatically by the energy released, taking the assembly sub-critical.
The device was entirely naked, unshielded, hence the name.
Feel the power of E=mc^2 in extremely advanced energy technology!
@ProxyNuker actually, the energetic electrons are traveling FASTER than light. because it is in water, they are able to do so. these atoms interact with the water molecules which then emit a blue light. its like a sonic boom, but in water, and without sound.
No. We went down that road; water has only two paths to radioactivity: dissolved contaminants (which "pure" eliminates), and long time neutron bombardment which will create the occasional tritium nucleus. This possibility can be eliminated by filtering out the deuterium or by replacing the water with fresh water, flushing out the deuterium.
When stuff glow, science happens...
So this is how a Vavilov-Tcherenkov effect looks like. Interesting.
@Auto5k Well it depends your native language (ex: Chernobyl/Cherenkov - Tchernobyl/Tcherenkov).
@dcggames No the reason why the reaction is so quick, is because it is an rapidly expending process. The way it works simply explained. A neutron is fired to Uranium-235 which is in the bars. This creates a reaction which is able to give 3 types of reactions. 235/92U + 1/0N -> 99/42 Mo + 134/50Sn + 3 1/0N. This is for instance a reaction which is able to occur. So 1 neutron gives 3 neutrons in advance, and some radiation in the form of electrons and photons.
@paperbed The chain reaction starts when k, the number of neutrons per fission that cause another fission, exceeds 1. Then power increases exponentially. Because some neutrons are delayed, k can be a little over 1 and the increase is slow enough to easily control. If k >> 1 the increase is rapid. Even then, with proper design, thermal expansion and Doppler broadening rapidly reduce k even with the rods out. That's what you see here.
@VREDFOX ah my bad,thanks for clearing that up for me.have a nice day.
"Alright, that was cool!"
lol
@OzStriker1198 Exactly what you saw happen. The rod was very quickly removed but it took a couple of seconds until it was reinserted.
who knew that photon rays from the uranium had such a beautiful glow
that was spooky :)
alright, that was cool
Man..I thought it was Gus,s superlab for a minute.
thank goddess for that.
Yes it is.
@dcggames the electrons and photons are going faster as the speed of light in the water of its surroundings, that is the cherenkovradiation you are viewing in this video. So since there are ever increasing Neutrons in the water, the reactions go quicker and quicker. This makes that the power output goes from 0 to 680Mwatt in 50 milliseconds. When they stop the reaction by letting the control bars in, the neutrons are consumed by the control bars making new reactions impossible.
It is usually spelled Cerenkov. It is produced when a particle (in this case, a high energy electron) travels faster in water than light does. Yes, nothing travels faster than light *in a vacuum* but light changes speed when it goes through things like glass and water. That's why the pencil looks bent when you stick it in a glass of water. Anyway, the Cerenkov light is kind of a sonic boom but the particle emits the blue glow you see. Lots of particles, lots of blue glow.
"Yes, nothing travels faster than light *in a vacuum*". How do you know?
@@michasmarzewski3670 If anything traveled faster than light through vacuum, it would break causality.
@@silience4095 the only things it would break are theories.
@@michasmarzewski3670 Your point? Our current understanding is that nothing can travel faster than light, and so far it has worked well. It's useful.
Yeah if something traveled faster, it would break our theories, and lead to a better understanding of the universe. But until then, let's stick with our best understanding to date.
@@silience4095 it seems you've got my point. However, current theories are mostly meaningless POS. Everything we have was achieved thanks to experiments.
@ProxyNuker its a charged particle moving FASTER then the speed of light in water
@intrptr I think that's just a blob of warm water reaching the surface. It was produced by the core during the pulse and rose by convection, taking several seconds to reach the surface. Sort of like an invisible underwater mushroom cloud...
"Alright that was cool". Awesome to know that nuclear physicists with maybe a decade more schooling than I have still have a similar reaction to the Cherenkov glow!
dacypher22 Considering one constantly played with a core using a screwdriver, It dosen't really surprise me.
@ridder5152 Hmmm... I was suprised of the speed because I made the comparison between this situation and a large (power plant) reactor.. Since in that case the mW increase/decrease in a much slower rate... But after thinking about.. Those mW are coming out of the turbines.. This is different since no turbine is attached, right? So how are mW's measured? Just instant heat?
by 'speed of light' i meant the vacuum constant, sry for not pointing that out. There are two things that are essential: cherenkov radiation is emitted because the charged particle polarises atoms along its track so that they become electric dipoles and a photon in a medium is not a free particle. the wave propagation is obtained as a result of coherent addition of waves of individual atoms, which is the reason why particles with finite mass can be quicker than the phase velocity of light.
@soylentgreenb I'm not sure, but I think these reactors also go prompt critical. But their uranium hydride fuel makes it safe. The hydrogen acts as a moderator intimately mixed with the fuel, so as power ramps up the H instantly heats, the Doppler broadening un-moderates the reaction, and the reactor drops to a low steady power. This is unlike SL-1 where the water was outside the fuel elements, taking milliseconds to heat, un-moderate and stop the reaction after much more energy was released.
It has not been noted that this happens more around Chernobyl than it would have had the accident not happened, and experts have looked for it. It has recently been found that humans all over the world experience miscarriage much more frequently than was previously known due to all sorts of incompatibilities when sperm meets egg, and the egg dies before implantation. Perhaps a third to a half never get implanted, and are passed before the women detects pregnancy.
@HedgehogStudios1 You are looking at the radiation shielding, right there in the video: the water. Water is an efficient radiation blocker.
i do have some knowledge on nuclear reactors but i havent seen the inside of one so hwat are those cable looking things for and it looked like one shook after ther fired it
Or to put this in layman's terms:
Nothing can move faster than c, the speed of light in a vacuum.
BUT the speed of light in this water is only about 0.75c, and the electrons that are emitted by these things are moving faster that that, so what you're seeing is analogous to a sonic boom (caused by moving faster than the speed of sound), except that this is a blue light rather than a loud noise.
@ProxyNuker I've seen a video in which they say that the fast particles release photons from the media. Photons = light?
@ProxyNuker good for you! A+! FINALLY someone knows what goes on whenever that happens! people mostly think the reactor itself glows blue! i love you!(not really) XD
@stubelva nothing else to add about health physics and radiation......you got it all right......ALARA
Now in Laguna Verde burned fuel is being removed from the reactor core and the cherenkov radiation around the fuel rods is just amazing...an almost perfect sky blue surrounding the metal on its way out the water
@timfha In a sense you are correct, the particles are in fact traveling faster than light, BUT the particles are still moving at the speed of light. This is because the density of water slows down the speed of light by 3/4 of it's speed. The particles excites the water particles creating the blue glow. This is called the Cherenkov radiation. It's pretty amazing. So by slowing down the light's speed in a way it's cheating, because nothing is yet proven to be faster than the speed of light
720p for a 2009 video. Quite unique..
"alright that was cool"
@party4fun yeah although you would be reealitivly safe because there is about 6 or 7 feet of cool ish water
"Whoa..........mmkay that was cool..."
Suddenly the whole thing blows up and all you hear after that is someone shouting D'oh!!!
@ProxyNuker "...molecules moving through the water at the speed of light..." Nope. charged subatomic particles like electrons (e-) *exceed* the speed of light in water (that is decreaded by its refraction index), what causes a local dipole dislocation in water forming a Mach's cone. Accelerated electrical charge produces electromagnetic radiation. In this case, this frequency is in the optical range (blue). That's the genuine Cherenkov radiation. A variant can be produced at subluminal speeds.
3... 2... 1...
hey, why did my hair fall off?
@lemonsodumb I was talking about the new kind of renewable energy sources such as wind and solar power. But I get what you mean.
1.21 Gigawatts?!???
*****
Really?
***** aaaand it flew right over your head. If it hit you in the face you probably still wouldn't realise
***** it was a back to the future reference
why so serious?
+oldi184 GREAT SCOTT!
+invertedlow It's been a year--are you still a moron?
i never thought of it that way! very interesting. but i can definitely see the logic of that. can i ask where you picked that up? but because they are so easy to stop i don't believe it poses that threat. a few feet of air will stop it so water would stop it within centimeters. and i believe skin would stop it completely so normally the body should be un effected by this even with close contact. unless consumed.
looks stable
If you're worried about radiation from depleted uranium, don't. It is less radioactive than enriched uranium and natural uranium, and people handle handle those all the time. All you have to do is perform an image search of "uranium fuel pellet", and you'll see many pictures of the pellet in someones hand. Take it from a nuclear engineer. Now, heavy metal poisoning is however a legitimate concern from depleted uranium. FYI, DU can under NO circumstances fission like a bomb.
The light that taketh away
@IgorR91 yh i get it now! its really confusing when someone says "go through medium" this is what i didnt understand! but now i get it
Materials with high atomic weights and high density are much better at shielding x-rays and gamma rays. You need 4.5 times less weight and 90 times less thickness if you use depleted uranium rather than water.
Radiation shielding is not always as intuitive. In space you want to use lightweight materials(e.g. aluminium, plastics) for radiation shielding. The reason is that protons are not very penetrating by themselves but they emit penetrating x-ray bremsstrahlung if they stop too fast.
what happend after the counting down to one? did you insurt some material on the reactort?
@Enaryth yes true but even that would be slightly radioactive
What was the power output before the pulse? zero? Because in that case I'm wondering.. 50 milliseconds is insanely fast! Is that because of the reactor being relatively small?
@stubelva Its also not just water its D3 Deuterium, Heavy water.
@kkkiwi That's Cherenkov radiation which makes the water appear blue. I don't have enough space in this comment bar to explain it, but you could read the wikipedia-entry ^^
I just love this blue light...
Is that what they call "Cherenkov radiation" ?? it looks amazing if you ask me !!
@iPROFITDON isnt that the water cooling? isnt water cooling close to bars? would you use that water in your pool?
Is that blue glow coming from the fuel rods or do you guys have a blue light in there to see inside it? That's pretty awesome if that glow is simply coming from the radioactive energy. Also, is the water designed to stop the gamma rays or just to cool it? Very cool video. It's amazing that one of the universities in my country has more nuclear capability than most countries. Very cool stuff here.
I worked at Trojan for years. It looks very much the same.
@YamiPoyo Wrong on two counts. Deuterium is hydrogen-2, not -3; that's tritium. And this is ordinary light water, a better neutron shield than heavy water. Heavy water is used mainly in reactors burning natural (unenriched) uranium so as to absorb as few neutrons as possible, making more available for the chain reaction in the dilute ~0.7% U-235.
Are the ripples on the surface of the pool caused by the pulse? Some other vids of these test reactors exhibit ripples afterwards also.
The ripples are from the very long actuator rods that move the actual control rods in the reactor. The actuator rods are driven by motors above the water, and extend below the water and down to the reactor where they operate the controls. The water is being used to shield the reactor, which is why it's so deep. The actuator rods flex and wobble a bit while working, because they are so long and thin, and they make the ripples as they disturb the surface of the pool.
Actually the birth rate of deformed animals is a lot lower than people think, although it does happen, I'm not denying that. Radiation affects animals differently than it affects humans. Birds have been seen flying into and nesting inside the sarcophagus over Reactor 4 and they seem to come out unscathed.
@bazadc Hey did you see the news? What do you think about them clocking the neutrinos?
@SeanU235 why do nuclear reactors emit blue light? or is it to complicated to explain.
@ProxyNuker The molecules are not moving at the light speed here. They are moving faster than the light in this water.
So, in 50ms, 5 years of your life was just knocked off, thanks =D
Woow.....!
im pretty sure they are just moving faster than they normally would because they are so energized. but they are emitting photons not going faster than light. if thay some how are please share where you got that information
Gamma radiation falls exponentially with the amount of shielding. The halving distance is approximately 20 centimeter in water for the gamma rays produced by fission products from a nuclear bomb. If you wanted to reduce the exposure to gamma rays from the reactor by a factor of a quadrillion you'd need approximately 11 meters of water.
With 60 meters of water you'd reduce it so much that with 10^80 gamma rays(more than the number of atoms in the visible universe) it's unlikely any go through.
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