And after the reactor 4 explosion all of the rest of the rbmk reactor cores were fitted with safety systems to make sure it would be impossible for the reactors to exploded again and they were forced to fix all of them but the only way they did is that they got financial support from the European government
@ind0ctr1n3 There are a few glaring mistakes in your explanation. First; The Unit that had the prompt neutron excursion was Unit 4, not Unit 2. Unit 2 got shut down in 1991 after a serious fire in the turbine hall. Second: The accident at Unit 4 happened due to several things going on at the same time: 1; Because of the delay ordered by the Kiev Grid Controller they ran the reactor for at least nine hours at half power (1600 MW/t). This means that the xenon levels are going to rise. Xenon is a very powerful neutron poison. It gets produced as a fission byproduct in every nuclear reactor. When the reactor runs at full power, this is not a problem because you're burning it off as fast as it is produced. But when you run at half power the levels start to rise. Why? Because there's a delay in xenon production. It takes about 6.7 hrs for iodine to decay into xenon 135. Your reactor is running at half power, but xenon is still produced on the same level as when you were running at full power. And since you're now running at half power, not as much gets burned off. Thus the xenon level starts to rise, which can lead to what is referred to as a "poisoned reactor" or "being stuck in a xenon pit". There is so much xenon present that the chain reaction can no longer sustain itself and simply wants to decay away. This is what they tried overcome when they pulled out all the control rods when they were trying to raise the power to run their ill-fated test. It is very dangerous to try to restart a reactor that is in this poisoned state. 2; They had pulled out almost all the control rods to their upper limit stops, with only the equivalent of 6-8 rods left in the core at the time of the incident, which was way outside the design specs of the reactor. There was a group of at least 30 control rods that were supposed to be in the core AT ALL TIMES. In order to overcome the xenon poisoning they pulled those out as well. When pulled all the way up to the upper limit stops, the first thing that enters the core is not boron, but graphite which accelerates reactivity instead of quenching it. See below why that is such a bad thing. The control rod tips were not made of boron (which is a neutron absorber), but of graphite (which only acts as a moderator aka it speeds up reactivity). These "tips" were actually 3,5 meters long and were connected to the upper boron part via a telescope. Water can act both as a moderator and as a (weak) neutron poison. In the RBMK type reactors water mainly acts as a neutron poison. If the rods would have been made of boron only, you replace one neutron poison (boron) with another (water) when you pull them out of the channels, which makes your reactor run really inefficient. To offset this, the lower part was made of graphite to even out the fuel burn-up. In a way this would also enhance the effect of the control rods, theoretically making them a much more powerful control rod. But in reality, under certain circumstances, they could (and did!) make matters a lot worse. 3; Neutron poisoning means that something (water, xenon, boron etc.) is stealing away the neutrons before they can continue the chain reaction. This is exactly what you want when you want to shut down a nuclear reactor. The AZ-5 (Аварийная "Emergency" Защита "Protection" 5-й категории "Category", which roughly translates to Emergency Protection Category 5) shuts down the chain reaction by means of inserting boron, a neutron poison, into the core to quench the reaction. So, you're not trying to overcome neutron poisoning, you are trying to overcome the chain reaction by inserting a neutron poison. Unfortunately, due to their construction (with the lower part being graphite) they actually, for a brief moment, speed up reactivity instead of immediately bringing it down. When you combine that with a reactor that has been brought into a highly unstable state you set yourself up for disaster. It was well known to most operators that the RBMKs are notoriously unstable when run at low power, upon start-up (especially after a full refuelling of the core) and during shut-down. The reactor design is such that the positive void coefficient has the capability to outstrip the ability of the control rods to quench the reaction. In other words, the reactor has the potential to run away with itself and the control rods will be powerless to stop it. And this is what happened when they pressed AZ-5. Unwittingly they were shoving in more reactivity on top of an already out of control chain reaction, since the control rods had to start their descent from the upper limit stop position. This is a very simplified explanation btw. If I have to type out the whole thing in detail, I would still be typing tomorrow.
@ind0ctr1n3 That's nice, but my information comes from the official INSAG-7 report, among some other rather hefty official reports. If only I could show you my bookshelf with nuclear related reading materials. And yes, I eventually did see the series last year. However, because I have done extensive reading and studying on the Chernobyl accident I could also see what they got right and where they messed up. The same goes for what you wrote. Unit 2 didn't explode, that was Unit 4. Etc., etc..
Bull. Staff that highly trained can walk into new jobs, in fact they had probably all been hired for new positions before the switch was even turned. And they would have been retained for years to assist with the decommissioning. Same goes for oil and gas specialists, mining specialists, demolition specialists. These aren't jobs that can be outsourced to Pajeet in Calcutta over an internet line. People who say "learn a trade" are not trying to troll you. If you are degree material, your company will pay for that when you have proven yourself, not that you would necessarily want to take valuable time away from real experience and expertise building to pursue a piece of paper.
A devastating moment for these operators. Yes the RBMK-1000 is an inherently dangerous design, but with modifications it can be made reasonably safe and generate power for many more years. Nuclear power of other designs remains one of the safest and most reliable forms of energy generation. I hope people will understand this.
Honestly i wouldn't mind a nuclear power plant with just rbmk 1500 reactors, they were very efficient and alot safer than the old ones but the rbmk in general won't ever come back other designs such as the vver1200 are safer and more modern
The moment was after 1:34 .... "Now we are fired. Our country is in crisis. Main plants bancrupted. It's way to hard thinking about jop finding this time in Ukraine"
Commander Deadhead this was filmed in 2000 and pripyat was abandoned 1986 so i think they were living somewhere else, however they did loose thier jobs
I know exactly how these man must have felt turning that key and shutting her down for good. I did the same at my plant this year i was the one to turn the switch. The emotions that come up after executing such action took me at least 2 weeks to come over. Known that by turning the switch together with me 130 co workers had no job anymore.
@@nuremberg119 i dont really think so. If you have been working for years at a place. And you know you dont have anymore income. And the people youve seen everyday. Will not be there anymore. Believe me. Thats a different feeling. I hope you never have to experience. What ive experienced 3 years ago. Turning that key and shutting down a chemical facility after 70 years of production. Is a task like no other.
They were sad, they lost their place of work. They knew that place and they had worked there for a long time. They knew they had to switch it off. And with that switch. They’d have to move on from memories.
@@cohengamertv6548 Everyone did. But it had been 14 years since the accident. The plant was all these guys had known because in most Soviet countries. They had basic education and all they knew about was their job.
"I work at nuclear power plant in the US and we don't do that here." May have something to do with reactor 3 being right next to the sarcophagus of the devasted reactor 3. (The fact that reactor 1, 2 and 3 could be safely operated for years right next to the worst nuclear disaster in history is an unconvenient fact for "environmentalists" to cope with. That teams of scientists regularly took trips inside the sarcophagus tracking the spent fuel without a closed breathing system even more so.)
12 years later I've found this comment which accurately says what I've always thought. There's a reason why some groups of so-called environmentalist (actually, politicians in disguise) fight with all their might the reports of international and state agencies on major accidents like Chernobyl and Fukushima. Not enough death, illness and horror for their taste, there. And most of the public sadly follows them.
They pretend the safest form of power is going to kill us all 😂 Nuclear has by far the least deaths per gigawatt hour. More than four times as many people have died installing solar than have died due to nuclear energy.
Actually the doomed reactor was enclosed in concrete sarcophagus .After decontamination the rest of the units were declared fit to operate. Actually they continued to operate till 2000 when due of public protests the government was forced to shutdown these precious electricity generators.
@@Site-88 if rules were followed then this incident wouldn't have occurred. RBMK is the cheapest and most efficient reactor of soviet, only few design flaw remains.
From what I could find (records from 2000 Russia are scarce) it was a combination of negative stigma Chernobyl had, Ukraine not having enough money to sustain operation, and the reactor getting old. We know about reactor 4, and out of the other two, one caught fire and the other broke. It was probably a matter of shutting it down on their terms rather than wait for another accident
@Sotasukka The remaining three reactors stayed in service after the accident due to a power shortage. Reactor #2 was shut down in 1991 after a fire broke out in the turbine building followed by reactor #1 in 1996. Reactor #3 was shut down on December 15 2000. Workers still monitor the plant to keep the remaining nuclear fuel in check but no power is being produced.
On December 15, 2000 at 1:17 pm, AZ-5 was turned at the Unit 3 of the Chernobyl NPP to shut it down forever. I can imagine the anxiety the workers felt not to have a power surge when pressing AZ-5 as they did in 1986.
@@alanmalan3819 Can you explain to me where you got that from, I'm not pretending to be an expert but AZ-4 does not fully reinsert the rods so that would not shut it down.
What you have to understand is that the AZ-5 button only caused an explosion in Unit 4 because of the condition of the reactor in a positive void coefficient. The AZ-5 button was probably used hundreds of times before the accident without issue and they did it here too.
@@mylesmcl I’m unsure if the physics you said are correct, however it is correct that they had used it hundreds of times over several power plants, and the surge is even less now due to certain changes in the retrofitted RBMK-1000’s, even if they did the exact same things done in Chernobyl, as in raising from a xenon pit then doing the test at lower power and with practically no control rods in, it wouldn’t explode because the changes made it physically impossible for it to explode in the same way.
@@Thxtnt The 'physics' I said, as in the 'positive void coefficient' are completely correct, the RBMK reactors before retrofit had a void coefficient of 4.7 which was high and in the case of the accident was dangerous at low power levels. After the retrofit, the void coefficient was lowered to 0.7 with more enriched fuel, extra control rods, and an additional emergency rod system, this made the RBMK safer, but it is still an unideal reactor design and I can't say for certain that under similar conditions following the sequence of events of the accident replicated that there would be absolutely no problem with the reactor.
I feel sorry for these workers, because to them its more than a job, they are providing a nation with power, electricity, to warm their homes, cook their food. Its not their fault the raw power of the atom is so great, terrible and humbling.
@Sotasukka Actually they DID shut it down immediately when they had the chance. Chernobyl delivered four gigawatts of electric power. Shuttind it down instantly would have meant "lights out" in large parts of the Ukraine. They first had to raise four billion dollars to replace the power plant by new ones, before they could shut down the remaining three blocks. Due to the catastrophe they had already been one short...
Welp it isn't that simple as it's the switchs fault don't press it has to do with complicated nuclear physics that no one bothers to learn cuz they are boring
But we have to admit that RBMK reactors are amazing all those pressure tube and this huge size of the core itself made him one of the biggest reactors ever made... and for the accident lets face it if it was not the fault of the operators ? Why is this not happening again ? A fail safe yes but not at the extrem condition that was the reactor 4...
Conditions were not extreme, but somewhat unusual. The design had major flaws, some of them was ignored, some suboptimally addressed, and some were unknown. Those flaws had more impact in some regimes of operation than in other. It was only matter of time when unknowingly to operators various equipment will be in regime that will cause two or more serious design flaws to combine.
@woody4555 The testing was very necessary. The RBMK had a large positive void coefficient(boiling of water causes the reaction to speed up, so if the water ever starts boiling you must immediately stop the reactor) but it took fully 20 seconds to SCRAM the reactor and fully 1 minute to start emergency core cooling pumps. This is an unacceptable design. So what they wanted to test was if they could run the emergency pumps off of the generator as it is spinning down.
If your going to comment probably better to do so in full rather than using acronyms that most reading will have no idea about . No ones going to bother googling the meaning either.
@@sneakers6128 my guy they are reactor names bwr(boiling water reactor) rbmk (something about graphite moderated water cooled pressure channel reactor it's in Russian)
@Sotasukka Yes, there were people working in the other reactor blocks, basically doing business as usual. And there still are hundreds of people working in Chernobyl today. Because even a shut down reactor requires cooling and work to be done.
not really... it was not a nuclear detonation like in atom bombs. it was a runaway nuclear fueled boiler that ruptured. causing radioactive material to be thrown out. and made worse by graphite control rods burning and spreading radioactive particles in to the air , it could have been much worse if they did not manage to drain the coolant from the basement before the core melted through. super-heated metal and radioactive fuel hitting water would have caused a massive explosion
@grinderbroweng No no, that's not the danger of graphite(reactor grade graphite is a very poor fire hazzard. If you put an oxyacetylene torch to it will ever so slowly oxidize, but it not support a fire at all when the torch is removed). The danger with graphite is if you use water as a coolant. Both graphite and water are moderators; but graphite is a better moderator. If the water ever boils in the reactor, the reaction speeds up causing more water to boil in a vicious circle.
@Sotasukka I saw no one willing to give 3 mega watts of electricity to USSR/Ukraine between 1986 to 2000 for free. Therefore they kept remaining units operational as long as they could.
The graphite tips of all RBMK reactor controll rods where removed after the accident in Chernobly NPP. Actually there are 9 RBMK-1000 in operation. The last shutdown of an RBMK- 1000 is around the year 2050.
On insistent demands from the world community, Ukraine made the hard decision on the preterm closure of the Chernobyl Nuclear Power Plant. At 1:17 PM, December 15 2000, from the order of the President of Ukraine, the emergency protection key was turned, to stop for good the 3rd Chernobyl reactor. The nuclear power plant stopped generating electricity.
АЗ-5 снижает мощность путем ввода в активную зону стержней СУЗ,понижая тепловую мощность,РБМК после модификаций полностью безопасен,остановка 3ого ЭБ ЧАЭС печальная вещь,на фокусиме стояли реактор BWR вроде,я не помню,на РБМК такую проблему бы решили быстро с помощью ДГУС,на ЛАЭС повторяли такую ситуацию,надеюсь переводчик переведет все правильно,ибо мне самому такой текст писать по английски лень да и не все слова мне известны
"Stop Reactor 3 with Key AZ-5" "Executing...Key AZ-5 pressed...wait, did we ever get around to replacing those graphite tips on the contr....." **Reactor 3 explodes**
I'd be cool if that's the actual music that plays when a reactor shuts down. Note to self: if you ever design a nuclear power plant, have Alexa play Despacito when it turns off for the last time.
These RMBK-1000 reactors were originally used to make to make weapons grade plutonium. RMBK-1000 is what was used in Cherobyl to make electricity as a by product
It only lowers the control rods that stop the reaction in the reactor everything else in the power plant and heat coming from the fuel isn't effected by it so yea you should expect everything to shut off
It was not, the disaster was already produced, inside the xenon formed from the power surge already melted and blasted some of the graphite. The AZ-5 button only lowered the graphite bars into the hot-boi-steamy-for-them and that produced another surge of power which in fact was creating hidrogen...the hidrogen was the powerful force behind the second explosion, the one that ripped off the top of the building.
Actually if they had not pressed the AZ-5 the reactor would have just burst instead of explode, the surge from the graphite tipped control rods sent power levels to over 120 times more than the maximum capable output of the reactor flash boiling about 300 cubic metres of water in an instant. In the 5 or 6 seconds leading up to the pop the reactors seams were already splitting and blowing out sections of the building, this likely would have continued until all water had boiled off or escaped had the AZ-5 not been flipped. But obviously they had no way of knowing the magic shutdown button would be a tragic explosion button in this particular situation.
But imagine if all that fuel had been present to produce the slag, that much would have most assuredly melted through to the water table leading to an even bigger explosion and dispersion. Imho, this was the best scenario to play out for this instance.
the reactor 3 obviously should have been turned off as the 4th reactor that exploded is very close to the 3rd reactor.. reactor 1 and 2 should be ok to keep in production.
I'm surprised to learn their were employees working on site at the Chernobyl plant in 2008. How many years, prior to that, were these employees working there? I would have thought radiation levels would still have been too high to allow people to work there without putting their lives at risk. However, considering how little the Russian government values human lives, I guess it's not that surprising after all.
@dudeman659 The function keys are not like the switch that turns on the light of a room. Each key corresponds to an address of the Skala computer - the computer that processes the data of the installation. When a key is pressed the computer recognizes it and behaves according to its programming. For example the computer is programmed when the AZ5 is turned to lower all the control rods, to strike an alarm, turn on the appropriate indicators and do other thinks that we do not know.
@JONOTron You are referring to "Prizma" a program used to process reactivity calculations and needed this time for a cycle of results. Yes, most of the functions weren't automatic, the operators controlled the reactor. But the computer itself could trigger an emergency shutdown if a serious abnormality was detected. This system was bypassed that fateful night.
That little hestation before turning the switch. "Ah shit here we go again"
And after the reactor 4 explosion all of the rest of the rbmk reactor cores were fitted with safety systems to make sure it would be impossible for the reactors to exploded again and they were forced to fix all of them but the only way they did is that they got financial support from the European government
@ind0ctr1n3
There are a few glaring mistakes in your explanation.
First; The Unit that had the prompt neutron excursion was Unit 4, not Unit 2. Unit 2 got shut down in 1991 after a serious fire in the turbine hall.
Second: The accident at Unit 4 happened due to several things going on at the same time:
1; Because of the delay ordered by the Kiev Grid Controller they ran the reactor for at least nine hours at half power (1600 MW/t). This means that the xenon levels are going to rise. Xenon is a very powerful neutron poison. It gets produced as a fission byproduct in every nuclear reactor. When the reactor runs at full power, this is not a problem because you're burning it off as fast as it is produced. But when you run at half power the levels start to rise. Why? Because there's a delay in xenon production. It takes about 6.7 hrs for iodine to decay into xenon 135. Your reactor is running at half power, but xenon is still produced on the same level as when you were running at full power. And since you're now running at half power, not as much gets burned off. Thus the xenon level starts to rise, which can lead to what is referred to as a "poisoned reactor" or "being stuck in a xenon pit". There is so much xenon present that the chain reaction can no longer sustain itself and simply wants to decay away. This is what they tried overcome when they pulled out all the control rods when they were trying to raise the power to run their ill-fated test. It is very dangerous to try to restart a reactor that is in this poisoned state.
2; They had pulled out almost all the control rods to their upper limit stops, with only the equivalent of 6-8 rods left in the core at the time of the incident, which was way outside the design specs of the reactor. There was a group of at least 30 control rods that were supposed to be in the core AT ALL TIMES. In order to overcome the xenon poisoning they pulled those out as well. When pulled all the way up to the upper limit stops, the first thing that enters the core is not boron, but graphite which accelerates reactivity instead of quenching it. See below why that is such a bad thing.
The control rod tips were not made of boron (which is a neutron absorber), but of graphite (which only acts as a moderator aka it speeds up reactivity). These "tips" were actually 3,5 meters long and were connected to the upper boron part via a telescope. Water can act both as a moderator and as a (weak) neutron poison. In the RBMK type reactors water mainly acts as a neutron poison. If the rods would have been made of boron only, you replace one neutron poison (boron) with another (water) when you pull them out of the channels, which makes your reactor run really inefficient. To offset this, the lower part was made of graphite to even out the fuel burn-up. In a way this would also enhance the effect of the control rods, theoretically making them a much more powerful control rod. But in reality, under certain circumstances, they could (and did!) make matters a lot worse.
3; Neutron poisoning means that something (water, xenon, boron etc.) is stealing away the neutrons before they can continue the chain reaction. This is exactly what you want when you want to shut down a nuclear reactor. The AZ-5 (Аварийная "Emergency" Защита "Protection" 5-й категории "Category", which roughly translates to Emergency Protection Category 5) shuts down the chain reaction by means of inserting boron, a neutron poison, into the core to quench the reaction. So, you're not trying to overcome neutron poisoning, you are trying to overcome the chain reaction by inserting a neutron poison. Unfortunately, due to their construction (with the lower part being graphite) they actually, for a brief moment, speed up reactivity instead of immediately bringing it down. When you combine that with a reactor that has been brought into a highly unstable state you set yourself up for disaster.
It was well known to most operators that the RBMKs are notoriously unstable when run at low power, upon start-up (especially after a full refuelling of the core) and during shut-down. The reactor design is such that the positive void coefficient has the capability to outstrip the ability of the control rods to quench the reaction. In other words, the reactor has the potential to run away with itself and the control rods will be powerless to stop it. And this is what happened when they pressed AZ-5. Unwittingly they were shoving in more reactivity on top of an already out of control chain reaction, since the control rods had to start their descent from the upper limit stop position.
This is a very simplified explanation btw. If I have to type out the whole thing in detail, I would still be typing tomorrow.
@ind0ctr1n3
That's nice, but my information comes from the official INSAG-7 report, among some other rather hefty official reports. If only I could show you my bookshelf with nuclear related reading materials. And yes, I eventually did see the series last year. However, because I have done extensive reading and studying on the Chernobyl accident I could also see what they got right and where they messed up. The same goes for what you wrote. Unit 2 didn't explode, that was Unit 4. Etc., etc..
I'll bet their anuses were tightened then
LMFAO 😂😂😂😂😂😂😂😂
*As they watched them execute AZ-5 they all knew they were now jobless*
Actually, Chernobyl NPP is still very much working, even if undergoing decomissioning.
@@caav56 I was decommissioned n 2001.
50 Megaton Aviation and Gameplay wait you actually worked in Chernobyl?
John no, I just studied the topic of Chernobyl.
Bull. Staff that highly trained can walk into new jobs, in fact they had probably all been hired for new positions before the switch was even turned.
And they would have been retained for years to assist with the decommissioning.
Same goes for oil and gas specialists, mining specialists, demolition specialists.
These aren't jobs that can be outsourced to Pajeet in Calcutta over an internet line.
People who say "learn a trade" are not trying to troll you. If you are degree material, your company will pay for that when you have proven yourself, not that you would necessarily want to take valuable time away from real experience and expertise building to pursue a piece of paper.
Engineers: "Shutdown reactor with key AZ-5. Executing."
_To play us out, here's Ennio Morricone._
pickledegg1989 *uses key AZ-5* bc of the graphite tips explodes! th-cam.com/video/GxPS6ucD5Bg/w-d-xo.html
What does that mean "To play us out"?
@@-BuddyGuy FUCKIN' THING SUCKS.
last time that gave them a very bad day
There’s an Ennio Morricone composition for every occasion
When they lit up the cigarettes, I felt that....
turns off nuke reactor - lights a cig - russia/ukraine
Dad: Why you crying so damn loud?
Me:
same
yeah i have that feeling while watching these post soviet era videos
Well, at least they shut that unit down correctly..
Tiltdecker atleast it didn’t explode like reactor 4
@@Valaki415 Because reactor doesn't have experiment ,and a turbine was working
Ctrl+Alt+f4 didnt be invented at that time yet.
They exploded the second one because the shutdown button were'nt working
Thank god.
A devastating moment for these operators. Yes the RBMK-1000 is an inherently dangerous design, but with modifications it can be made reasonably safe and generate power for many more years. Nuclear power of other designs remains one of the safest and most reliable forms of energy generation. I hope people will understand this.
Honestly i wouldn't mind a nuclear power plant with just rbmk 1500 reactors, they were very efficient and alot safer than the old ones but the rbmk in general won't ever come back other designs such as the vver1200 are safer and more modern
The moment was after 1:34 .... "Now we are fired. Our country is in crisis. Main plants bancrupted. It's way to hard thinking about jop finding this time in Ukraine"
@@alanmalan3819 it’s just sad
@@alexandrosandreou8585 Comparing VVER to RBMK is like comparing oranges to apples. They’re too different for any kind of reasonable result.
@@alanmalan3819 Migration was an answer for major part of them.
everyone's chillin' until the power goes 33 thousand megawatts
the music is making me feel sentimental for a nuclear reactor that was shut down before I was even born lol
Is not because the shutdown is there because these people just lost their jobs and have to abandon pripyat their home then again I could be wrong
Commander Deadhead this was filmed in 2000 and pripyat was abandoned 1986 so i think they were living somewhere else, however they did loose thier jobs
@@turbocharger5482 They didn't lose their job. After it they start working in other nuclear plant.
@@hellolol5388 Or stayed on Chernobyl NPP to work on decomissioning it.
It was sentimental because of the memories of Chernobyl for these workers. I’m a way it was saying goodbye.
I know exactly how these man must have felt turning that key and shutting her down for good. I did the same at my plant this year i was the one to turn the switch. The emotions that come up after executing such action took me at least 2 weeks to come over. Known that by turning the switch together with me 130 co workers had no job anymore.
I think that the emotions are more because that botton was the detonant of the explosion in the reactor 4
@@nuremberg119 i dont really think so. If you have been working for years at a place. And you know you dont have anymore income. And the people youve seen everyday. Will not be there anymore. Believe me. Thats a different feeling. I hope you never have to experience. What ive experienced 3 years ago. Turning that key and shutting down a chemical facility after 70 years of production. Is a task like no other.
I can relate to the feeling, loosing my job in during the corona epidemic. You say goodbye to economic security, a way of life, and a social context.
I'm so sorry. I have been through two closures, and it is devastating. Many people are not going to find good jobs.
@@cremebrulee4759 :( damn i am sorry to hear that mate
Sad radioactive noises
That retro synth at the end is radioactive bro
You mean the Le Professionnel movie soundtrack?
It's so good! Sovietwave-4-Life!
Hehehehehahahaha
What’s its half-life?
So is that cigarette the guy is smoking
1:20 The nostalgia hit me right in the face.
the looks on the operators faces made me a bit sad...they looked sad...
They were sad, they lost their place of work. They knew that place and they had worked there for a long time. They knew they had to switch it off. And with that switch. They’d have to move on from memories.
@@centralcontroller6483 they probably felt sas for the victims of that disaster in unit 4
@@cohengamertv6548 Everyone did. But it had been 14 years since the accident. The plant was all these guys had known because in most Soviet countries. They had basic education and all they knew about was their job.
"I work at nuclear power plant in the US and we don't do that here."
May have something to do with reactor 3 being right next to the sarcophagus of the devasted reactor 3.
(The fact that reactor 1, 2 and 3 could be safely operated for years right next to the worst nuclear disaster in history is an unconvenient fact for "environmentalists" to cope with. That teams of scientists regularly took trips inside the sarcophagus tracking the spent fuel without a closed breathing system even more so.)
12 years later I've found this comment which accurately says what I've always thought. There's a reason why some groups of so-called environmentalist (actually, politicians in disguise) fight with all their might the reports of international and state agencies on major accidents like Chernobyl and Fukushima. Not enough death, illness and horror for their taste, there. And most of the public sadly follows them.
They pretend the safest form of power is going to kill us all 😂 Nuclear has by far the least deaths per gigawatt hour. More than four times as many people have died installing solar than have died due to nuclear energy.
Actually the doomed reactor was enclosed in concrete sarcophagus .After decontamination the rest of the units were declared fit to operate. Actually they continued to operate till 2000 when due of public protests the government was forced to shutdown these precious electricity generators.
Now there is the new safe confinement.
Precious?
@@Site-88 if rules were followed then this incident wouldn't have occurred. RBMK is the cheapest and most efficient reactor of soviet, only few design flaw remains.
I thought reactor 1 partially melted down, but not as bad.
The unit 3 was closed in the year 2000
I'm not crying, just something got in my eyes :(
in soviet Russia, plant shuts YOU down.
This Ukraine....
Used to be Soviet Union
Doesn't matter, that will never get old!
@@jesseboombatts r/wooooooosh
@@MuhammadReza-xi5jw Soviet Russia and Soviet Union are different things.
disabling the perfectly good reactors was the most irrational thing to ever happen there
From what I could find (records from 2000 Russia are scarce) it was a combination of negative stigma Chernobyl had, Ukraine not having enough money to sustain operation, and the reactor getting old. We know about reactor 4, and out of the other two, one caught fire and the other broke. It was probably a matter of shutting it down on their terms rather than wait for another accident
@Sotasukka The remaining three reactors stayed in service after the accident due to a power shortage. Reactor #2 was shut down in 1991 after a fire broke out in the turbine building followed by reactor #1 in 1996. Reactor #3 was shut down on December 15 2000. Workers still monitor the plant to keep the remaining nuclear fuel in check but no power is being produced.
Today all all three reactors are fully decommissioned.
what turbin exactly? TG-4 or TG-3
"They're all delusional. Take them to the infirmary".
Bru HBO's chernobyl is innacurate
On December 15, 2000 at 1:17 pm, AZ-5 was turned at the Unit 3 of the Chernobyl NPP to shut it down forever. I can imagine the anxiety the workers felt not to have a power surge when pressing AZ-5 as they did in 1986.
AZ4 they used
@@alanmalan3819 Can you explain to me where you got that from, I'm not pretending to be an expert but AZ-4 does not fully reinsert the rods so that would not shut it down.
What you have to understand is that the AZ-5 button only caused an explosion in Unit 4 because of the condition of the reactor in a positive void coefficient. The AZ-5 button was probably used hundreds of times before the accident without issue and they did it here too.
@@mylesmcl I’m unsure if the physics you said are correct, however it is correct that they had used it hundreds of times over several power plants, and the surge is even less now due to certain changes in the retrofitted RBMK-1000’s, even if they did the exact same things done in Chernobyl, as in raising from a xenon pit then doing the test at lower power and with practically no control rods in, it wouldn’t explode because the changes made it physically impossible for it to explode in the same way.
@@Thxtnt The 'physics' I said, as in the 'positive void coefficient' are completely correct, the RBMK reactors before retrofit had a void coefficient of 4.7 which was high and in the case of the accident was dangerous at low power levels. After the retrofit, the void coefficient was lowered to 0.7 with more enriched fuel, extra control rods, and an additional emergency rod system, this made the RBMK safer, but it is still an unideal reactor design and I can't say for certain that under similar conditions following the sequence of events of the accident replicated that there would be absolutely no problem with the reactor.
I love how they go from ''60s lounge music to a knock-off of "Elegia" by New Order.
No, New Order more likely ripped off Ennio Morricone's 'Chi Mai' with 'Elegia'.
Which 60s music?
I feel sorry for these workers, because to them its more than a job, they are providing a nation with power, electricity, to warm their homes, cook their food. Its not their fault the raw power of the atom is so great, terrible and humbling.
@Sotasukka Actually they DID shut it down immediately when they had the chance. Chernobyl delivered four gigawatts of electric power. Shuttind it down instantly would have meant "lights out" in large parts of the Ukraine. They first had to raise four billion dollars to replace the power plant by new ones, before they could shut down the remaining three blocks. Due to the catastrophe they had already been one short...
I like how AZ-5 was partially responsible for the explosion, as it triggered it,
And they still shut it down with AZ-5
Lol
In normal operating conditions it works flawlessly
Welp it isn't that simple as it's the switchs fault don't press it has to do with complicated nuclear physics that no one bothers to learn cuz they are boring
1:04 operator:any last word
UNIT-3:no.......;(
AZ-5 EXECUTED* REACTOR IS NOW PERMANENTLY SHUTDOWN BEEP BEEEP BEEEP*
RIP RBMK-UNIT-III
The moment their jobs came to an end...
Smoking in the control room probably is a greater cancer risk than staying in designated areas in the exclusion zone.
But we have to admit that RBMK reactors are amazing all those pressure tube and this huge size of the core itself made him one of the biggest reactors ever made... and for the accident lets face it if it was not the fault of the operators ? Why is this not happening again ? A fail safe yes but not at the extrem condition that was the reactor 4...
Years after the disaster, they removed most of the graphite tips on the control rods, so the remaining RBMKs are much safer now.
Conditions were not extreme, but somewhat unusual. The design had major flaws, some of them was ignored, some suboptimally addressed, and some were unknown. Those flaws had more impact in some regimes of operation than in other. It was only matter of time when unknowingly to operators various equipment will be in regime that will cause two or more serious design flaws to combine.
I started crying at the end
AV Naumov same
@woody4555 The testing was very necessary. The RBMK had a large positive void coefficient(boiling of water causes the reaction to speed up, so if the water ever starts boiling you must immediately stop the reactor) but it took fully 20 seconds to SCRAM the reactor and fully 1 minute to start emergency core cooling pumps. This is an unacceptable design.
So what they wanted to test was if they could run the emergency pumps off of the generator as it is spinning down.
Fukushima Daiichi is not a RMBK. It's a generation I BWR.
no, only unit 6 was a gen 2 BWR
Isus666999 no it's a 2nd gen idiot
FAT BREEDING 5 6 MOX FUEL 3 A BLOW TO HELL ALL OVER NORTH AMERICA
If your going to comment probably better to do so in full rather than using acronyms that most reading will have no idea about . No ones going to bother googling the meaning either.
@@sneakers6128 my guy they are reactor names bwr(boiling water reactor) rbmk (something about graphite moderated water cooled pressure channel reactor it's in Russian)
Beginning music is brilliant, i was just waiting for someone to say "welcome to jackass"
1:20 Nice move playing Chi Mai for dramatic impact. I almost cried.
@Sotasukka Yes, there were people working in the other reactor blocks, basically doing business as usual. And there still are hundreds of people working in Chernobyl today. Because even a shut down reactor requires cooling and work to be done.
people really should stop joking about chernobyl..
@egg185 the exclusion zone is for normal people not for people working in the reactor
anyone else find it ironic that the last one to be shut down is RIGHT NEXT TO THE ONE THAT BLEW UP?!
not really... it was not a nuclear detonation like in atom bombs. it was a runaway nuclear fueled boiler that ruptured. causing radioactive material to be thrown out. and made worse by graphite control rods burning and spreading radioactive particles in to the air , it could have been much worse if they did not manage to drain the coolant from the basement before the core melted through. super-heated metal and radioactive fuel hitting water would have caused a massive explosion
janjancummings the reactor exploded, Dyatlov
@@F4n3e bring him to the infirmary, he's delutional
Yep
Not just next to the one that blew up, they both shared the SAME BUILDING!
Dad: why you crying so damn loud
Me: You wouldn’t understand
the fact that any of the liquidators who helped clean up the town from reactor 4 exploding didnt get mentioned that just makes me mad
@grinderbroweng No no, that's not the danger of graphite(reactor grade graphite is a very poor fire hazzard. If you put an oxyacetylene torch to it will ever so slowly oxidize, but it not support a fire at all when the torch is removed).
The danger with graphite is if you use water as a coolant. Both graphite and water are moderators; but graphite is a better moderator. If the water ever boils in the reactor, the reaction speeds up causing more water to boil in a vicious circle.
The end of a career's worth of dedication & work with a simply turn of a switch....kind of sad really.
@Sotasukka I saw no one willing to give 3 mega watts of electricity to USSR/Ukraine between 1986 to 2000 for free.
Therefore they kept remaining units operational as long as they could.
Part of me died when he turned it off
When it was recorded, the bottom of the control rods were replaced already? I mean they were not graphite anymore in 2000?
they probably still had graphite tips but im not 100% sure
The graphite tips of all RBMK reactor controll rods where removed after the accident in Chernobly NPP. Actually there are 9 RBMK-1000 in operation. The last shutdown of an RBMK- 1000 is around the year 2050.
@@derwildewesten6700 fucking communism
On insistent demands from the world community, Ukraine made the hard decision on the preterm closure of the Chernobyl Nuclear Power Plant. At 1:17 PM, December 15 2000, from the order of the President of Ukraine, the emergency protection key was turned, to stop for good the 3rd Chernobyl reactor. The nuclear power plant stopped generating electricity.
Poor guys. They all looked worried about their future, where and when their next job is gonna come.
Bright Sun Films?
1:11 this hits diffirent... brought flashbacks
I’ve sat at that very control panel!
You're ukrainian?
@@alimahh1 no I did a 2 day tour in 2018 of the plant, Pripyat and area. 10/10, I want to go back.
Łezka w oku się kręci.
half of the lights turn on "ah shit here we go again"
I love how they wear toque hats to keep hair from falling on electrical controls but they don't mind smoking around the same controls.
That’s not for their hair, it’s simply an anti-contamination to keep their head from becoming contaminated
1:07 goodbye chernobyl
Shut down on 13:17
АЗ-5 снижает мощность путем ввода в активную зону стержней СУЗ,понижая тепловую мощность,РБМК после модификаций полностью безопасен,остановка 3ого ЭБ ЧАЭС печальная вещь,на фокусиме стояли реактор BWR вроде,я не помню,на РБМК такую проблему бы решили быстро с помощью ДГУС,на ЛАЭС повторяли такую ситуацию,надеюсь переводчик переведет все правильно,ибо мне самому такой текст писать по английски лень да и не все слова мне известны
да, это переведено. Спасибо за информацию. Привет из Техаса!
Maybe they should do some testing on this one too, like the Chernobyl disaster that needs Cleaned up YET
"Stop Reactor 3 with Key AZ-5"
"Executing...Key AZ-5 pressed...wait, did we ever get around to replacing those graphite tips on the contr....."
**Reactor 3 explodes**
_-What just happened?_
_-It exploded!_
_-It's impossible, RBMK reactors don't explode. Take him to the infirmary._
@@anatolydyatlov963 shut up its stopped being funny a long time ago
@@marcusdurand5387 1986, to be exact.
They don't removed them anyway. They just changed them so the graphite "tip" can't exit the core.
I got nervous as he pressed AZ 5.
It must been hard for them😢
What is the song at the start? I can't seem to figure it out.
0:00-0:04 What is the music called?
@Director84 alright, but were there people working in the reactors while there were destroyed reactor near?
The destroyed core was 20 mètres away
@@morocco622 no it was way further like 60 meters away from unit 3
@@morocco622 hence the radiation in unit 3 was minimal
Dexter's laboratory shutdown sound...
Chernobyl was created in 1982
This is the video of the great slaying of a beast. One that should have rid the world before it’s creation. Rest in pieces RBMK.
in peace
Still 8 RBMKs in operation actually, they aren’t all dead
Not wrong, they all should shut down by 2034 though@@MojaveSubMatthew
Este es el comentario en español que estabas buscando
What a fucking PR move.... They SCRAMed the Reactor for the Press. They even could shut it normally down....
Bloody hell, I think I watched this in the news when it happened. Probably Euronews? Not sure. Anyway: Pretty sure this was not the music though.
How can I be responsible? I was sleeping ...
i thought there would be mini boom becuase of AZ-5 flaw at chernobyl
R.I.P Unit 3
Wow….. Smoking in the control room…….. Not today……
Key AZ-5 didn’t look too secure...
I'd be cool if that's the actual music that plays when a reactor shuts down.
Note to self: if you ever design a nuclear power plant, have Alexa play Despacito when it turns off for the last time.
whats the elevator music thingy at the beginning
They all realised they were now unemployed
Why would the hit SCRAM and not do a controlled shut down? That's like deciding to shut off your car with the emergency break.....
@donrlam I think that one guy started up smoking... 1:52 "Ahh well fuck, if working at a Nuclear power plant wont give me cancer..."
These RMBK-1000 reactors were originally used to make to make weapons grade plutonium. RMBK-1000 is what was used in Cherobyl to make electricity as a by product
Well the plutonium was a by-product but okay
Dude its a RBMK not RMBK
Put Fs in the chat for unit #3
F
F
F
F
F.
Worried of course,but demand for the day, only bcoz of few people who are responsible for the cause.
Why'd I expect a little switch to turn everything off
It only lowers the control rods that stop the reaction in the reactor everything else in the power plant and heat coming from the fuel isn't effected by it so yea you should expect everything to shut off
Isent AZ-5 the same button they pressed that caused the spike that blew up reactor 4.
WackyBroProductions you bet
It was not, the disaster was already produced, inside the xenon formed from the power surge already melted and blasted some of the graphite. The AZ-5 button only lowered the graphite bars into the hot-boi-steamy-for-them and that produced another surge of power which in fact was creating hidrogen...the hidrogen was the powerful force behind the second explosion, the one that ripped off the top of the building.
Kind of, but in a different situation. And the AZ-5 only accelerated the disaster, they were doomed even if they didn't press it.
Actually if they had not pressed the AZ-5 the reactor would have just burst instead of explode, the surge from the graphite tipped control rods sent power levels to over 120 times more than the maximum capable output of the reactor flash boiling about 300 cubic metres of water in an instant. In the 5 or 6 seconds leading up to the pop the reactors seams were already splitting and blowing out sections of the building, this likely would have continued until all water had boiled off or escaped had the AZ-5 not been flipped.
But obviously they had no way of knowing the magic shutdown button would be a tragic explosion button in this particular situation.
But imagine if all that fuel had been present to produce the slag, that much would have most assuredly melted through to the water table leading to an even bigger explosion and dispersion. Imho, this was the best scenario to play out for this instance.
whats the music??
Chi Mai - Ennio Morricone (en.wikipedia.org/wiki/Chi_Mai)
I remember this music in Roblox Chernobyl unit 3
the reactor 3 obviously should have been turned off as the 4th reactor that exploded is very close to the 3rd reactor.. reactor 1 and 2 should be ok to keep in production.
what is so obvious in this decision?
why don't your country shut off all of reactors?
Unit 2 was no longer operational in 1991
Music at beginning?
Wow... Just watch the sad faces of the workers. What are they sopposed to do now?....
In progress now.
What are those black rectangle things clipped to their suits?
dosimeters
@@fichtltuning thank you
This reactor should never be used or turned on after reactor core of Chernobyl reactor 4 exploding
Why?
yeah, but they didn't just use #3 after the accident but also #2 and 1 because of energy shortages in the ukraine
@@izabelastrak4664 unit 1’s turbine caught on fire and the roof collapsed onto the pumps and turbine in 1991 marking the end of unit 1
I dont want to scare you, but 7 of these Reactor are Running an Generating Power right now...
Really dangerous
I'm surprised to learn their were employees working on site at the Chernobyl plant in 2008. How many years, prior to that, were these employees working there? I would have thought radiation levels would still have been too high to allow people to work there without putting their lives at risk.
However, considering how little the Russian government values human lives, I guess it's not that surprising after all.
I was in the toilet
Right now. 3 German Nuclear power Plants in Grohnde, Gundremmingen C and Brokdorfshut down for ever.
Turn the lever of A3 5
*power surge aggain*
"ah shit, here we go aggain
AZ-5
background song?
the good ending: shutdown suess
Buy a vanity plate for your car that says, “AZ-5” and see if anyone recognizes it. Or D-LZ 129.”
What does d-lz mean
@dudeman659 The function keys are not like the switch that turns on the light of a room. Each key corresponds to an address of the Skala computer - the computer that processes the data of the installation. When a key is pressed the computer recognizes it and behaves according to its programming. For example the computer is programmed when the AZ5 is turned to lower all the control rods, to strike an alarm, turn on the appropriate indicators and do other thinks that we do not know.
@JONOTron You are referring to "Prizma" a program used to process reactivity calculations and needed this time for a cycle of results. Yes, most of the functions weren't automatic, the operators controlled the reactor. But the computer itself could trigger an emergency shutdown if a serious abnormality was detected. This system was bypassed that fateful night.