Nuclear Fission (Animation)

In this animation we deal with the basics of nuclear fission, which takes place e. g. in nuclear power plants.

[@rekhabansode4888]

This was so useful in this LOCKDOWN

[@Ballacha]

Interesting video. From what I know, U235 is often used in bombs because it’s less stable than U238.

[@RajeshGupta-oc9ix]

Mister Schwenke, you make amazing videos!

[@asmitaaryan8729]

Best explanation ever.......mindblowing 👍

[@kancharlasunilkumar3269]

Thanks for valuable information...

[@popularblocks2093]

Excellent as always

[@10--50]

So you can make the fuel pellets in a factory all day long and they'll be completely stable... but it just takes one neutron with the right energy to get the whole thing started? but to maintain the reaction a moderator (water) must be used to keep the neutrons slow enough to split other uranium atoms? if so why couldn't you just take the rods out of the water and the reaction would stop? and also how does it begin? I've seen photos of people holding control rods, so they're obviously not dangerous until activated.. what activates them? I'm dying to know

[@lecturesandlearningchannel6605]

Most naturally occurring elements undergo some type of decay. One of Uranium's natural decay products is neutrons. However, like you note, without a moderator, these neutrons aren't absorbed by the nuclei of other Uranium atoms and so they don't cause fission. This is the key... Decay is a natural breakdown of elements that release alpha, beta, gamma, and neutron radiation. Fission is the profound breaking of the nucleus of an atom, releasing an incredible amount of energy in the form of heat. So, when you add the moderator, it really plays two roles... One as a way to slow the natural occurring neutrons down so that they may be absorbed by an unstable Uranium nucleus, and one to remove the heat released from fission. That means, to directly answer your question, that if we were to remove the moderator once fission has been initiated, we would remove the coolant from the fuel and the expertly constructed fuel pellets matrix would melt. Once the nuclear fuel is a molten blob at the bottom of a core, it is no longer arranged in such a way that fission can be maintained and controlled and the fission reaction eventually dies, leaving only decay.

[@filipkralj2618]

great video but I laughed with last sentence, depressive ending haha

[@anjanaroymandal1632]

Fabulous!!!🙂🙂🙂

[@umaranisarkar2832]

Nice . it is so easy to understand

[@allahisgreat1015]

nice information sir 👌

[@samirsoni9564]

How that single neutron,which initiates the reaction is practically done in the reactors?

[@Titus357]

Add ELECTRICITY to cause a change of state (fission).

[@sangeethakalyanasundaram3824]

Wonderful animation!!!

[@PrakashKumar-dp5jz]

You should have mentioned about the neck effect, i.e influence of nuclear and electrostatic energy

[@numberslettersass]

I feel like we missed the point with nuclear energy. Everything is a nail to the man with a hammer. Everything is a steam powered turbine to us....because we had them and can make them.

[@Yathuprem]

Is there a limit in which we can use the control rods?? And as always great work with videos ☺👌

[@hfd268]

Yathu prem yes they do get replaced but rarely

[@grantchang81976]

There's a critical amount of Weapons grade material Which is 50 to 60 kg Of weapons grade uranium

[@ShauriePvs]

can you sir, please tell what software you use for creating these amazing 3d animation videos? is it blender?

[@ThomasSchwenke-knowledge]

Nope, it's Carrara 8 Pro. I don't like Blender...

[@ShauriePvs]

ok.. thanks for replying and please continue doing these amazing videos frequently?

[@GlazzedDonut]

These are great thank you

[@Lesics]

That's a direct hit on Learn Engineering :)

[@tanushasharma1051]

Nice

[@BlueSky......]

i need to know how to give ionizing radiation to my prisoners in gmod

[@markobenko6110]

From where comes that neutron that start fission?

[@dvrockin609]

Might be some external energy like heat or electricity which triggers the reaction

[@krutika6769]

This channel is underrated!

[@sonulokhandesharingexperie8353]

How to start for first time. How to attatck 1 neutron

[@10--50]

If you learn that please let me know, I'm trying to research the same thing and can't find it anywhere

[@sonulokhandesharingexperie8353]

@@10--50 okk bro😅

[@JimboMasterPlus]

me too ! hugs from Brazil !

[@Titus357]

Add ELECTRICITY to cause a change of state (fission).

[@lecturesandlearningchannel6605]

Most naturally occurring elements undergo some type of decay. One of Uranium's natural decay products is neutrons. However, without a moderator, these neutrons aren't absorbed by the nuclei of other Uranium atoms and so they don't cause fission. This is the key... Decay is a natural breakdown of elements that release alpha, beta, gamma, and neutron radiation. Fission is the profound breaking of the nucleus of an atom, releasing an incredible amount of energy in the form of heat. So, when you add the moderator, it really plays two roles... One as a way to slow the naturally occurring neutrons down so that they may be absorbed by an unstable Uranium nucleus, and one to remove the heat released from fission. That means that if we were to remove the moderator once fission has been initiated, we would remove the coolant from the fuel and the expertly constructed fuel pellets matrix would melt. Once the nuclear fuel is a molten blob at the bottom of a core, it is no longer arranged in such a way that fission can be maintained and controlled and the fission reaction eventually dies, leaving only decay. So, the way to start the fission process is simply to slow down the naturally occurring neutrons using a moderator such as water.

[@3.14name]

But how they start that chain reaction? They just lower the rods ?

[@Titus357]

Add ELECTRICITY to cause a change of state (fission).

[@lecturesandlearningchannel6605]

Sort of... The control rods contain neutron absorbing materials such as boron and halfnium. When you withdraw the control rods, you expose the fuel rods to one another. If there is a moderator present, such as water, then the naturally occurring neutrons are slowed down to an absorption energy level and can go on to cause fission.

[@TheTechFreeq]

2:20 And how the single initial event is started?

[@JimboMasterPlus]

no one knows. I need the answer too but nobody can talk

[@Titus357]

Add ELECTRICITY to cause a change of state (fission).

[@imperatornicolae3232]

Then how do melt downs happen?

[@Yellow13200]

danX Nicolae the rods get too hot and literally turn into molten uranium

[@theofficialcreator2231]

@@Yellow13200 which is where the term "meltdown" comes from. I love the etymology of physics, lol

[@akashdeepkumar751]

Came after HBO'S Chernobyl to understand nuclear fission

[@TN_HondaDad]

Ditto- an absolutely fascinated with nuclear fission now. Lol

[@nuclearTANK]

Good now you know how a nuclear reactor works, now you don't need Deatlov anymore. Remember the max is 3.6 rodgen not good but not terrible.

[@AbdulBasit-rt4qk]

1st nutron is thrown by nuclear accelerators .there are different accelerators available for this porpose..

[@DavidZetino]

Here after watching the movie Oppenheimer

[@veervishalmishra4526]

How Quantum Fields are made

[@the_midnight_blues]

I might understand this if my name were Sheldon Cooper.

[@xxxjacktacion4294]

Hahaha this had me dying 😆

[@nuclearTANK]

Just watch Chernobyl

[@janoskovacs1160]

This video was really poorly done. Especially the fission.