I don't understand the "dollar values" here, and while I didn't get a stopwatch out and time it, there didn't seem to be a difference between the $2.00 pulse and the $1.01 pulse...
I have a noob question: What is that light really? Is it the "radiation" glowing? From movies, you are always left with the idea, that nuclear goo is glowing green. In "Widowmaker K-19" the guys working on the FUBAR reactor, is walking around in a blueish, glowing water. I was just thinking it was the Hollywood FX guys, trying to make it "flashy". By the way, respect to the guys who sacrificed themselves, trying to fix that reactor.
@Azarien A "dollar" is the difference in reactivity between critical (where there are just enough neutrons to keep the chain reaction going, including delayed neutrons) and prompt critical (where there are enough prompt neutrons to keep the reaction going, without the delayed neutrons). The difference strongly influences how fast the reactor power increases. Fortunately, these reactors have some strong inherent negative feedback mechanisms to limit the amount of energy in a pulse.
This doesn't harm anyone, since the core is submerged in water. The water is absorbing the radiation, which is the blue light that you see, called Cherenkov radiation. The radiation is slowed down enough so it's radio spectrum turns into light, instead of Gamma Radiation, so it's perfectly safe.
@computerfreaq17 The Cherenkov Reaction isnt caused by Water-absorbing. More it is a "Super Sonic Boom" with light. Since the Rays, emitted from the core are faster than the speed of light in Water!
@deepskyblues No problem, just errased one of your comment's copy. In fact this video is not mine, i have just uploaded it, because I thought it's interesting. :)
See the German lang. vid "Inside Chernobyl." There's footage of the liquified reactor core which ate through the concrete water tank lid and poured down to form a large conical glob of black/green goo. They call it the "Elephant's foot."
in a nutshell, a $1.00 of reactivity is the amount needed to allow the reactor to be critical on prompt neutrons only. this is not typically a safe condition for normal operation, but in pulsing, the system is designed to immediately shutdown the reactor following the pulse. this limits the "uncontrollability" inherent in a core that doesn't use the delayed neutron population to regulate the generation of fissions.
@sweetness00peace critical just means the reactor is at power, basically up and running. Prompt critical is typically not a safe condition because it takes the reactor from a shutdown state to critical almost immediately (prompt) which isn't a desirable condition unless you are doing testing and maintenance on the control systems to see that they are working properly and respond correctly. I'm not sure which reactor this is but its probably used for teaching purposes as well as research
@EugeneLancelot In any reactor, power is grows or decreases exponentially. Normally this happens very slowly and the reactor is easy to control because a few % of the neutrons sustaining the chain reaction are emitted some time after fission. When "prompt" critical, prompt neutrons are enough to sustain the reaction so the power doubles every few milliseconds. These research reactors have inherent fast negative feedback, making them safe to operate prompt critical.
@ApolloWasReal I agree with you in every way and the neutrons emitted later are called delayed neutrons but what gives these reactors the fast negative feedback?
@EugeneLancelot It has to do with the chemical form of the fuel. The TRIGA uses uranium zirconium hydride. I think it has to do with the hydrogen being intimately mixed with the uranium so that when the U heats up, the H also immediately heats, expands and reduces its ability to moderate neutrons. But I'm not sure of the details.
^_^ ive seen this reactor... if you ever get a chance to see a reactor like this in real life, take it... it is sweet.
SuperDuran21 3 weeks ago
I don't understand the "dollar values" here, and while I didn't get a stopwatch out and time it, there didn't seem to be a difference between the $2.00 pulse and the $1.01 pulse...
hgryphon 4 weeks ago
Is so pretty, must touch, FRHFFGDJXSGWSFHIFDHIKFCVUGDVGTGGVV *death*
Manadox97 1 month ago
@PetaJUGENE Thanx! Your English is very well!
rayrsa 9 months ago
I have a noob question: What is that light really? Is it the "radiation" glowing? From movies, you are always left with the idea, that nuclear goo is glowing green. In "Widowmaker K-19" the guys working on the FUBAR reactor, is walking around in a blueish, glowing water. I was just thinking it was the Hollywood FX guys, trying to make it "flashy". By the way, respect to the guys who sacrificed themselves, trying to fix that reactor.
rayrsa 10 months ago
Yeah I know I was just being dumb. This is the internet after all! :D
adm2204 10 months ago
I love how after all the tech and research put into this stuff, we overload a reactor just so we can see the pretty colors it makes.
adm2204 10 months ago
@adm2204 Umm... I think there's probably a LITTLE more to it than that.
agcatdriver 10 months ago
Why are the pulses measured in dollars?
Azarien 11 months ago
@Azarien A "dollar" is the difference in reactivity between critical (where there are just enough neutrons to keep the chain reaction going, including delayed neutrons) and prompt critical (where there are enough prompt neutrons to keep the reaction going, without the delayed neutrons). The difference strongly influences how fast the reactor power increases. Fortunately, these reactors have some strong inherent negative feedback mechanisms to limit the amount of energy in a pulse.
ApolloWasReal 8 months ago
what happens when u pulse it
alexvnsc 1 year ago
Don't let ladyes play with nuclear stuff OMG XD
PowerMirai85 1 year ago
The announcer sounded angry.
m4ssee 1 year ago
What's the purpose of pulsing a reactor in this way?
MrHeyheyhaha 1 year ago
This has been flagged as spam show
Instead of pulsing it, why don't you make some real money?
Jemalacane 1 year ago
This doesn't harm anyone, since the core is submerged in water. The water is absorbing the radiation, which is the blue light that you see, called Cherenkov radiation. The radiation is slowed down enough so it's radio spectrum turns into light, instead of Gamma Radiation, so it's perfectly safe.
computerfreaq17 1 year ago
@computerfreaq17 The Cherenkov Reaction isnt caused by Water-absorbing. More it is a "Super Sonic Boom" with light. Since the Rays, emitted from the core are faster than the speed of light in Water!
FireIwithoutIwire 1 year ago
Does that stuff burn?
barbarotico 1 year ago
Sorry, didn't mean to spam, having connection difficulties. :)
deepskyblues 1 year ago
@deepskyblues No problem, just errased one of your comment's copy. In fact this video is not mine, i have just uploaded it, because I thought it's interesting. :)
LeoGryffith 1 year ago
This is by far the most interesting thing on YouTube.
deepskyblues 1 year ago
@deepskyblues
Your sarcasm has really enthralled me.
Ultrareallism 1 year ago
that wulda made 6hrs of power for a home
biggdaddy2001 1 year ago
Very very cool, thanks for posting this! I wonder what the inside of Chernobyl's reactor 4 looked like when it 'sploded?
sisko197 3 years ago
> inside of Chernobyl's reactor 4 looked like
See the German lang. vid "Inside Chernobyl." There's footage of the liquified reactor core which ate through the concrete water tank lid and poured down to form a large conical glob of black/green goo. They call it the "Elephant's foot."
wbeaty 2 years ago
@wbeaty |The core was in part exposed, emitting X-Rays that instantly killed people watching it from a bridge kilometers away.
hardcoded 1 year ago
what do you mean $2.00? the amount of electricity that would have been produced if it were connected to a generator?
10mintwo 3 years ago
in a nutshell, a $1.00 of reactivity is the amount needed to allow the reactor to be critical on prompt neutrons only. this is not typically a safe condition for normal operation, but in pulsing, the system is designed to immediately shutdown the reactor following the pulse. this limits the "uncontrollability" inherent in a core that doesn't use the delayed neutron population to regulate the generation of fissions.
bothenook 3 years ago 10
I'm sorry, what did you say?
johnmacward 1 year ago
@bothenook so... a $1.00 worth of material would be enough to cause a runaway?
letterpool 11 months ago
@bothenook so how is the energy made from this then?
and why would u want to set the reactor to a critical condition? what is a reactor like this all about??
sweetness00peace 11 months ago
@sweetness00peace critical just means the reactor is at power, basically up and running. Prompt critical is typically not a safe condition because it takes the reactor from a shutdown state to critical almost immediately (prompt) which isn't a desirable condition unless you are doing testing and maintenance on the control systems to see that they are working properly and respond correctly. I'm not sure which reactor this is but its probably used for teaching purposes as well as research
EugeneLancelot 10 months ago
@EugeneLancelot In any reactor, power is grows or decreases exponentially. Normally this happens very slowly and the reactor is easy to control because a few % of the neutrons sustaining the chain reaction are emitted some time after fission. When "prompt" critical, prompt neutrons are enough to sustain the reaction so the power doubles every few milliseconds. These research reactors have inherent fast negative feedback, making them safe to operate prompt critical.
ApolloWasReal 8 months ago
@ApolloWasReal I agree with you in every way and the neutrons emitted later are called delayed neutrons but what gives these reactors the fast negative feedback?
EugeneLancelot 8 months ago
@EugeneLancelot It has to do with the chemical form of the fuel. The TRIGA uses uranium zirconium hydride. I think it has to do with the hydrogen being intimately mixed with the uranium so that when the U heats up, the H also immediately heats, expands and reduces its ability to moderate neutrons. But I'm not sure of the details.
ApolloWasReal 8 months ago
Muito impressionante!! O efeito cerenkov é muito lindo!! é uma das coisas mais belas que já vi na vida!
alexra29 3 years ago