Chernobyl only became a problem when the rod temperature reached "film boiling". That's like a hot fry pan on which water droplets dance and sizzle, so about the temp you get when you want to fry a steak. Once Chernobyl hit that "film boiling" temperature the heat transfer changed from "convection dominant" to "radiative dominant". Temp jumps from about +120C to like +3000C and that's the "yipes run man!" because the metal is melting.

great vid but your accent makes your narration a little difficult to understand without captions

They use cheep cooling rods Boom. You welcome.

3:23 . boooooooOOOOOOOOOOMMMMMMMMMMMMMMMMMmmmmmmmmmmm

15:13 it give me goosebumps

Just the sort of sound you don't want to here on your Geiger counter at work.

this was actually a very simple and clear simulation that illustrates the accident VERY well! It's satifying seeing it put all together from the functioning parts and then terrifying to see that scenario playout with all the pieces together

не страшно

Looks like my FPS… 😂

this recommend for me at 3 am

After seeing this simulation a couple of times in IG, I didn't imagine the original video could explain it so well and make this realitevly easy to understand, well done.

So the control rods are used to slow down neutrons so the core doesn’t overheat because it can withstand high temperatures. But I guess graphite spontaneously oxidizes in the presence of oxygen at 550 degrees celcius and the operators allowed it to get too hot, so the control rods caught fire. This kind of fire is self-sustained as long as oxygen is present, so the reactor fire lasted a VERY long time. The Chernobyl accident wasn’t directly caused by the graphite rods, but these kinds of rods have directly caused a near accident before. In Chernobyl due to their design there was a massive power surge that happened mid-test and the coolant fluid basically ran out, so the fuel rods melted together and hit criticality almost immediately. And then the graphite rods just happened to draw out the event. I think modern rods are made of zirconium.

So the control rods are used to slow down neutrons so the core doesn’t overheat because it can withstand high temperatures. But I guess graphite spontaneously oxidizes in the presence of oxygen at 550 degrees celcius and the operators allowed it to get too hot, so the control rods caught fire. This kind of fire is self-sustained as long as oxygen is present, so the reactor fire lasted a VERY long time. The Chernobyl accident wasn’t directly caused by the graphite rods, but these kinds of rods have directly caused a near accident before. In Chernobyl due to their design there was a massive power surge that happened mid-test and the coolant fluid basically ran out, so the fuel rods melted together and hit criticality almost immediately. And then the graphite rods just happened to draw out the event. I think modern rods are made of zirconium.

OU FAK !!

3:27 My ears blew up

Utterly brilliant explanation!

Spanish versión !

Why did they remove the control rods?

What they did was just as smart as lifting a beryllium lid over a nuclear core with nothing but a screwdriver

I'm still missing something about the graphite tips. I wish they would have been in the simulation right from the start. How is it just the tip if the whole thing is going out the bottom… I don't get it. Also, it would've been nice to have the legend at the bottom for all the simulations.

SCRAM portion got REALLY terrifying REALLY QUICKLY!

What I'm understanding happened is when the operators removed the control rods to burn off the xenon and initiate the test they underestimated how unstable the reactor would be the moment they started the test due to the positive void coefficient. They they further complicated the issue by further misunderstanding the graphite tips of the withdrawn control rods so once they scammed every rod would itself be reactive rather than neutralizing for a few moments and in the distressed state of the reactor effectively rendered it into a bomb. Only in RBMK reactors could this sort of thing happen because of their choice in moderators versus Western reactors which use water. Were RBMK reactors more potent in trade off? Like why use something so dangerous that could so easily be placed into a critical state?

I bet your computer exploded doing the simulation.

As many videos I've watched and articles and research documents I've read over the years, nothing ever explained what exactly happened in the RBMK reactor at Chernobyl. Wonderful job on this!

Dangg. I can feel the radiation through my screen

I have no idea what is going on this vedio

The last few seconds made me feel fear, that shit is terrifying.

I don't know much about nuclear physics, the only physics i know there is when a bullet hit through a zealot's cranium and let him said his final word: Monolith

Really shows you what a big difference there is between modern reactor design and the old RBMK at Chernobyl. I never thought about how the moderator, the thing that accelerates the reaction, is also important for cooling it down. Don't reactors have other cooling systems besides pumping in more water? I suppose using water is very cheap and fast, but are there any coolants that don't work as moderators that are used as an emergency measure?

hold da op man kan nemt høre du er dansk

My god, amazing simulation. congratulations!

They dun goofed, consequences will never be the same

Great job

Churn No Bull

This should be a game on Steam

I would love to see a simulation of the ones that are impossible to blow up. Thanks for the great video of what went wrong and why

Yeah...that ending was intense and insane. Love how you put the video clip in there showing the rods move and the explosion. Listening to the atoms pop slowly then immedately ramp up was axiety inducing! Great video!

I feel attacked and yet so well understood and I'm only a minute into the video lol. You have my attention and my curiousity.

When valery legasov said “the power went beyond 30,000” I’m sure it did cause I couldn’t see jack shit on the top 😂

I hate it when my RBMKs melt through the floor.

This is truly incredible !

Adding the audio of the particles reacting took the reactor runaway from disturbing to spine chillingly terrifying. This is by far the best simplified example of the Chernobyl disaster. This animation was brilliantly simplified for ease of understanding, while maintaining the horrifying reality of the situation.

15:02 Was that an engineering malfunction that control rods got stuck?