This is How an RBMK Nuclear Reactor Explodes : Chernobyl Truth Revealed

The truth behind the RBMK reactor core explosion at Chernobyl Nuclear Power Plant. Uncover the shocking details in this revealing video.
HBO's "Chernobyl" is a gripping and haunting miniseries that delves into the catastrophic nuclear disaster that occurred in 1986 at the Chernobyl Nuclear Power Plant in Pripyat, Ukraine. Through a meticulous blend of historical accuracy and compelling storytelling, the series unfolds the events leading up to the disaster, the immediate aftermath, and the subsequent efforts to contain and understand the unprecedented crisis. As it meticulously recreates the atmosphere of fear, urgency, and human resilience, "Chernobyl" offers viewers a sobering and thought-provoking exploration of one of the most significant man-made disasters in modern history.
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0:00 Intro
0:07 Explanation
12:54 Original videos
13:43 Outro
#Chernobyl #trending #biggestnuclearaccident #Nuclearpowerplant #atomicblast #Atombomb #Sovietmistakes #ARS #Nucleardisease #Radioactive #movie #movieexplanation #hbo

[@ssgpentland8241]

he was dying anyway, but he wanted to expose the rot of the USSR to the world. He did just that and we all see him as the hero he really was. Its just a shame he never lived to know how his bravery impacted the world. Its also widely believed that the failure at Chernobyl is what ultimately caused the disillusion of the USSR

[@ScreenXplained]

A lot of Europeans proclaimed Chernobyl incident to be one of the major reason for the fall of USSR.

[@tidan4575]

@@ScreenXplained The USSR was already on its way out, this incident was just the straw that broke the camel's back.

[@ScreenXplained]

@@tidan4575 Yes, you are right, that's exactly what I've heard.

[@nicolesantana4376]

I finally saw the whole miniseries two days ago. I was 10 years old when this happened. So tragic.

[@nyckhusan2634]

Reactor#4 was put into minimal power 200 MW by 1:00 and was ready for electrical " Rundown of turbine " test. But all initial steps were a failure. At 1:03 additional main circulation pump was started. It added 7,000 m3/h of water flow across reactor to initial 42,000 m3/h. It affected instantly parameters of boiling water on outlet from reactor and added negative reactivity. to reactor. Nominal pressure of boiling water on outlet should be 70 bar with temperature 284 C and content of steam 14-19% on nominal power of 3200 MW heating and 1000 MW electrical. . Inlet temperature should be 270 C with pressure 79 bar. On minimal power of 200 MW ( heating) parameters of water supposed to be the same to keep water reactivity across reactor constant and output power supposed to be regulated by control rods. Water supply to reactor was not reduced back to nominal and instead control rods were taking out to compensate less reactivity of boiling water which had less voids. It was first mistake. On 1:06 second additional pump was started. Again, total water flow was not reduced and more control rods were taking out. It was second mistake. Total water supply to reactor was increased to 56,000 m3/h. As result, water level in separators dropped, because main circulating pumps were taking more water from them. To prevent emergency shutdown of reactor on low water level in separators this safety was deactivated. It was third mistake. Feeding water to separators from turbine condensers was 1.200 m3/h with temperature 165 C. Water temperature on inlet to reactor dropped to 265 C, because less steam was produced by reactor and temperature on separators dropped. Temperature control on separators was deactivated. It was forth mistake. On 1:09 water feeding to separators was reduced to 180 m3/h on northern side and 90m3/h on southern side to increase water temperature on inlet to reactor to keep it running on minimal 200 MW of heating power. It was fifth mistake. Water temperature on inlet to reactor increased to 281C on northern side and to 283 C on southern side. Outlet temperature was 284 C. Temperature gradient across reactor was 1-3 C instead of 14C nominal. Water started to boil once it entered the active zone. On outlet content of steam reached 100% instead of allowed maximum 19% in a few minutes. Reactivity of boiling water sharply increased with extra voids in it all the 7 meters-long way from bottom to the top. But power of reactor stabilized on 200 MW with almost all control rods taken out and positive reactivity maintained by overheated boiling water. At 1:23:04 " Rundown of turbine " test started. Steam supply to turbine TG-8 was closed, bypassing it directly to condenser. At the same time 4 main circulating pumps were switched to generator TG-8.Two additional circulating pumps, that were put into operation on 1:03 and 1:06, were left on back up electrical supply from the grid. At that time reactor supposed to be shut down by switch AZ-5, but it was not done. Dyatlov decided to repeat test twice or three times if it would fail, for some reason test must be completed by any means before reactor will be put out of operation for weeks. Diesel generators started , but with 6 sec delay for some reason. Water supply to reactor started to drop, because 4 pumps were running on electrical supply from generator TG-8 with turbine running on inertia forces. It overheated reactor even more. At 1:23:39 Toptunov pressed switch AZ-5 for one second before diesel generators went into full power that required 40-45 sec. All control rods went down from the top, short rods that should to go from the bottom at that time were not implemented in reactor, despite of recommendations since 1975. Control rods passed 0.4 meters down for one second, displacing water under it. Lower part of control rod was made of graphite , that was left in active zone as moderator, while boron part ( capturer of neutrons) was in the top position out of active zone. Active zone was 7 meters long, graphite part of control rod was shorter, it was 4.5 meters long and was hanging in the middle, leaving column of water 1.25 meters above and 1.25 meters below. On the way down graphite end of control rod displaced water. Water has less reactivity, even when is full with voids, than graphite, so positive reactivity in the bottom 1.25 meters zone increased further. On 1:23:41 Toptunov pressed AZ-5 second time. All control rods moved further down displacing all water in the bottom of active zone in the next 2 seconds. Positive reactivity of reactor reached maximum level on the bottom zone, especially on the southern side. On 1:23:45 US satellite detected flash of green light over Chernobyl Power Plant. Explosion breached 2-meters thick massive concrete protective plate ( scheme " OR " ) on the bottom on south-east corner, destroyed all inlet water communications further down and this plate fell 4 meters down with support concrete base C in the shape of cross. Top plate " E " ( weight of around 1000 T) was blown up. hit crane on 12 meters height and fell down to reactor place. Top and bottom plates were welded to 160 mm fuel tube channels, these connections were torn off along with inlet and outlet water piping. Debris reached altitude of 3 km. On 1:23:47 sec there was a second explosion, about 10 times more powerful. Analysis of air probes. taken thousands km away, found presence of fission products of isotopes of Uranium, Neptunium and Plutonium. Rate of Xenon-135/ isomer m Xenon-135 ( exited state) was found to be 22. During normal critical reaction in reactor this rate is maintained at 35, after nuclear explosion of A-bombs this rate is about 11. Rate proved that reaction in reactor during first explosion was over-critical in supposedly 3-30 fuel tube channels of over 1,600 total. Estimated power in TNT equivalent was about 10 T. Second explosion was Hydrogen/ Air mixture volume explosion with estimated power of 100 T of TNT. During 2 explosions about 95% of nuclear fuel was dispersed in the atmosphere of Earth.

[@Big_Bag_of_Pus]

I don't understand why people choose to use robotic narrators; but I do wish folks who employ robotic narrators would make them pronounce names correctly.

[@ScreenXplained]

Its easier and takes less time if I use AI voice. I know it sometimes pronounce words and names incorrectly but I definitely try to make it pronounce them correctly. I guess its because AI is still under development and it has not been perfected yet.

[@balintvarga5146]

@@ScreenXplainedQuality content would be a lot better than quantity. Hard to trust the accuracy of a video if 90% of the names are absolutely slaughtered.

[@secondnature87]

Awful low effort video

[@dexterpoindexter3583]

​@@ScreenXplained Doesn't it start to sound like AI voices are as well built as Soviet reactors.

[@ScreenXplained]

@@dexterpoindexter3583 😂😂😂

[@jerryumfress9030]

Legasov as other people have said, was the ultimate hero in all of this tragedy. He stood alone in front of the court and spoke the truth

[@ScreenXplained]

The tapes he recorded before taking his life, opened the eyes of many others who demanded the change on how things were working.

[@davidbaca7853]

Actually he never was in the courtroom, that was just a movie dramatization

[@ZombieGuyDevelopment]

Great stuff

[@ScreenXplained]

Glad you liked it❤️

[@sigurdkaputnik7022]

The title of this clip rather misleading. You are talking about the tv-show, not the real event. The scientific reasons for the accident are simplified in the HBO series. Legasov and Cherbina were not present duting the real trial.

[@ScreenXplained]

Real pictures of them attending the trial have been shown at the end of the last episode. The explanation might have been simplified, but still a lot of Russians do not agree with what it is shown in the series. Since I am not the Nuclear expert, I can't say what's right and what's not, but the Title is not misleading. At the end of Legasov's speech, he says 'This is how the RBMK reactor explodes... "LIES"', and I have used it as the title. The thumbnail also showing a scene from the series.

[@johncronin9540]

If you have watched the miniseries, from the very beginning, the question is repeatedly asked, “How do you explode an RBMK reactor?” And the top engineers had no answer. It was, apparently, widely believed even among experts that an explosion wasn’t possible. The trio responsible for the test (and their immediate response after the explosion) would throw this question in the face of everyone who challenged their explanation of what happened. But the experts (the female leading scientist was a fictional character, but basically created to represent the many nuclear scientists and engineers who worked in the field of nuclear reactors, who played a role in trying to solve the crisis) knew from the data they observed- graphite on the ground, extremely high radiation levels, that an explosion HAD to have occurred, they just didn’t know, in the immediate aftermath of the catastrophe, HOW it happened. That was later revealed as they investigated, despite the noncooperation of the three top leaders of the plant (who were trying to cover their rear end), exactly what happened.

[@bobdadnaila7708]

This is how I watch movies, now.

[@ScreenXplained]

You must be too busy with life.

[@samuelkovanko7198]

Well explained!

[@ScreenXplained]

Thanks for the support. :D

[@mattheww797]

It was pretty cool how the reactor blew. It's adventures like this that make life fun and interesting. It was a good learning experience.

[@baddoer]

Hundreds of people died, land was poisoned for decades, whole cities evacuated are fun?

[@Ed-ds3hj]

😂

[@mar10ssj1]

Pro tip: Background music is too DAMN LOUD AND DISTRACTING!!! FFS!

[@ScreenXplained]

Yes, you are right. I was new with this channel, I’ve fixed this issue in my newer videos.

[@ScreenXplained]

Thanks for the tip ❤️

[@joemag6032]

1:33 Khomyuk is a fictional character. She never existed. The series' ending credits make this clear.

[@ScreenXplained]

Yes.

[@paveldrotar4493]

It's a nice video, but it would really be nice if you wouldn't butcher the pronunciation of the names of the characters. Even in English dubbing of the series, they never pronounced "Dyatlov" as "[Die] - ut - loff", as you did. That said, thank you for making this.

[@ScreenXplained]

Thank you for supporting. I did not change their name spellings but the AI model pronounced the name the same way everytime. I think it was because of the American accent. AI can’t tell that Russian names are pronounced in a different way. Maybe I should have changed the name spellings to make them sound right. It didn’t come to my mind at that time. I’m glad you enjoyed the video.

[@TonyLovell]

I "unliked" this video for a TTS narration.

[@ScreenXplained]

Would you like to watch a similar video in Asian accent, I bet you'd like that.

[@nicolesantana4376]

I would love to hear that 😂

[@brooneil1632]

Its like repeating word for word movie. Just play the movie.

[@ScreenXplained]

Yes, mostly summarized it with some animated explanation so its easier to understand, but I rather suggest my viewers to watch this series, instead of watching this explanation as it will be worth it.

[@johncronin9540]

It’s a good miniseries (far too long for a movie), but the story is not told linearly, which can make it confusing for a viewer unfamiliar with the story. These scenes are from the last episode, but it’s the first time in the series that we see what happened in the control room, leading up to the explosion. That doesn’t get shown at the very beginning. The first episode starts immediately before the explosion, and focuses on various people’s response to the catastrophe, centering on lower level staff inside the reactor, and first responders (ordinary firefighters who had no idea how radioactive the area was, and completely unprepared, in terms of protective equipment (from high levels of radiation) or protocols for handling the material or how to put out a very unconventional fire.

[@ScreenXplained]

Yes, this is an explanation of episode 5, I explained other episodes too, later I combined them and posted a 30 min video. I think it’s too long to keep people engaged.

[@jeffl977]

Why do people post a great movie or clip and totally ruin it with ridiculous narration? Nobody needs this, we can all watch the actual scene.

[@Crackerjuice75]

The ai narrator is insufferable.

[@ScreenXplained]

Please do leave a detailed review so I can improve my new videos, your review means a lot.

[@richardwilson7685]

@@ScreenXplained No need for a detailed review, just don't narrate them in the future.

[@mcutrim72]

...And that's why capitalism, despite all their errors... Still the onlys system you can try to prosper...

[@chriscadillac8448]

Yes. Communism only breeds failure and sub-standard quality.

[@bigdogzone3177]

Soviet Reactors don't explode :)

[@ScreenXplained]

Not blaming anyone, but a reactor can explode anywhere and only later we know what caused the explosion. It makes us better at what we do and can prevent it from happening again. Soviets did that with all of their other reactors that were running on the same design. They fixed them.

[@Vietcongunderdefeated]

​@@ScreenXplained he is saying the line what soviets officials said

[@Average_Space_Nerd]

@@Vietcongunderdefeatedclassic soviet propaganda

[@Vietcongunderdefeated]

@@Average_Space_Nerd im saying truth watch the movie

[@user-pm5nk1xo5q]

In soviet Russian reactor, you explode

[@jebotipasmater]

In Kiev, as god intended.

[@victorfinberg8595]

soviet corruption --> soviet disaster (chernobyl) western corruption --> western disaster (fukushima) the story is the same, only the actors change. never forget that.

[@sigurdkaputnik7022]

@@ScreenXplained That is utter nonsense. Fukushima was caused by an earthquake and a tsunami. Hardly the result of corruption.

[@IrishCarney]

Fukushima was trivial. Literally nobody died from its radiation, but many victims of the earthquake and tsunami died awaiting rescue that was delayed by irrational nuke-phobia.

[@victorfinberg8595]

@@IrishCarney your post is insanely stupid and completely false. seriously, grow a brain before you post nonsense online. people are not as stupid as you

[@ScreenXplained]

I understand that you might not agree with someone's opinions but please be polite and put your logic to prove yourself right. Calling someone stupid only shows that you are short tempered and have no valid reason to call someone out.

[@reefmariusjaramillo6991]

huhh???? chernobyl is cheap reactor???

[@ScreenXplained]

It's only an explanation of what is depicted in the HBO series, but a lot of it is not true. Join the Reddit group of Chernobyl to get a better understanding.

[@sonicmastersword8080]

Comparatively with the Western designs, yes. The reactor in a Western model is considerably smaller than a RMBK and near everything is over engineered to prevent the escape of radioactive material, with numerous contingency and emergency response plans developed plus operational safeguards against radiation leakage. The RMBK by contrast is sealed only with a steel concrete lid, is massive in comparison, utilizes graphite as a moderator instead of water-meaning the coolant and moderator are divorced elements that need to be controlled separately, and the whole assembly is basically inside a modified warehouse from that era as opposed to the reinforced concrete-steel dome from Western designs.

[@czkmeister]

@@sonicmastersword8080 Keep in mind RBMK reactors purpose wasn't only in making energy, they were meant for weapons too.

[@ScreenXplained]

69K Views.

[@mopar3502001]

All these AI generated channels these days.

[@trevorbolz9401]

Stop with the AI voice. Just narrate.

[@ScreenXplained]

If the channel generates enough views, I’ll do it.

[@davidthompson3415]

Wow, at the reactor had some democrats in control of which always destroys everything they touch 🥺