T. Folse, a nuclear engineer and someone who has actually worked in nuclear power, is making a reaction series to my work. So much added, high quality detail! Check it out:
https://www.youtube.com/watch?v=7_nlSoLwXG8

I live next to two power plants, one nuclear and one coal.
The nuclear plant had a slight heavy water leak. It made national news.
The coal plant had a turbine explode on startup and threw a shaft nearly all the way through an 18 in steel door. Miracle nobody was killed. Hardly anyone IN MY TOWN knows about it. I only learned about it from a friend who works there.

These nuclear powerplants can produce some incredible electricity, but if you could harness the power of my excitement when an Animagraffs upload drops we wouldn't need any powerplants.

The placement of hand and body figures throughout the video is an extremely overlooked part of the video by many and vastly increases understanding of many parts of the system. Well done

I work at Westinghouse. Thank you for succinctly explaining our AP1000. This gives a better high level overview of PWRs than most of our new hire training material or any other resource short of reading a 5000 page final safety analysis report or years of industry experience. As a fun fact I wanted to leave because I specialize in reactor vessel internals, reactor coolant from the cold leg inlet nozzles impinges upon the core support barrel and is forced to take a serpentine path down to the bottom head of the reactor vessel and flow up through the fuel assemblies to reach the hot leg outlet nozzles not just to allow for efficient heat transfer and moderation, but also as a means to keep water always covering the fuel assemblies, kind of like a U water trap in your toilet that keeps foul odors from travelling up your sewage pipe and out of your toilet or sink. One of the most important accidents we design for is called a large break loss of cooling accident (LBLOCA), where one of the pipes leading in or out of the reactor vessel essentially falls off, spilling and blowing down the reactor coolant inventory all over the containment building instead of conducting heat away from our fuel assemblies. This design feature always makes sure that if one of our precious reactor coolant lines gets cut, water will remain inside the lower elevation fuel assemblies and safely remove the residual heat from a reactor that just tripped, instead of all just pouring out a broken pipe.

These breakdowns scratch the very same itch as those "things-cut-in-half" books, where each drawing is on transparent plastic so you could take the ship, car, or dinosaur apart, layer by layer.

TL;DR: Spicy rocks make water angry.

Finally, all I need to know to make my own nuclear reactor.

I just know T. Folse Nuclear will react to this

I feel obligated to mention, regarding the very last statement at the end of the video, that nuclear power has the lowest death per TWh out of all energy sources except wind solar, including Chernobyl and Fukushima.

The risk is often overstated, or possibly the risk of more classical power sources is understated. Nuclear is an incredibly safe energy source.

Recieving a notification from Animagrafs makes you open your notebook directly

All this uranium was created 6 billion years ago when two neutron stars collided.

BABE NEW ANIMAGRAFFS VIDEO DROPPED

Finland has built a permanent nuclear waster storage site. They are quite lucky because Finland is very non-active geologically: that means no volcanoes, and barely any earthquakes. In fact a lot of the deep bedrock has been sitting there unchanging for billions of years. So their solution is to just dig a really deep hole, put the waste caskets down, and shut it with clay.

I have to be honest. When the scale of the design starts, it's humbling. The scale is  almost terrifying

6:33 I'm very glad you mentioned the actual quantum mechanical way the atoms behave :D

To think that the financial value of this video could buy you a whole country 100 years ago it's insane considering we get to watch it here for free. Nice work. The magnitude of this education isn't lost on us.

It's unbelievable to me just how much of the system is closed-loop. It makes sense in explanation, but I still find it amazing how the only open-loop portion of the system is cooling the steam after power generation. Really amazing stuff

Harnessing the immense power of atomic reactions to power a kettle.

A couple really important points to note:

The safety systems shown are just the most prominent passive systems designed to to kick in, in a situation as bad or worse than those that lead to the fukushima accident. They are not by any means the only safety features and are not the last line of defence.

Most of the features shown would allow for a relatively quick turnaround time before the reactor could be restarted and put back online for most faults. In more severe faults they mean that the reactor is repairable or relatively easy to decommission without radioactive release.

Even if nobody is able to refill the external cooling water after several days and the core is exposed completely and gets hot enough to actually meltdown it's still not going to cause a containment breach. The APR1000 along with pretty much all gen 3+/gen4 reactors have what's referred to as a corium catcher below the reactor itself. It involves specalised structures and sacrificial material that slows, disperses and cools molten fuel emulsions without it melting through the containment structure. So even if these reactors suffer multiple catastrophic failures and people aren't able to intervene at all for days to weeks there will be no breach of containment and no need for anything like the clean up around fukushima.

Aside from safety, the other point and a correction to make is regarding fuel. Most of the used fuel is actually still usable. It isn't so much that fissile material is spent in used fuel but rather fission products make maintaining criticality infeasible. The spent fuel in those casks can, from a technological point of view, be reprocessed and used atleast once more. The world already recycles about 36% of used fuel and there's no technological barrier to reprocessing all used fuel atleast once. The reason the number is only 36% is because it's simply cheaper to make fresh fuel from virgin materials.

It's also worth noting on the matter of fuel that U235 is not the only source of energy. When U238 absorbs a neutron, a significant percentage of it becomes fissile plutonium which then fissions just like U235, contributing significantly to overall energy production over core life.

In terms of final storage and longterm waste management it's worth also pointing out that it's not the uranium and plutonium in the fuel that's the problem. It's your intermediate half-life elements. Pure plutonium and Uranium are actually relatively safe to handle from a radiological point of view as they're not actually that radioactive. It's mostly a tiny percentage of used fuel bundles that are isotopes that have half lives in the hundreds or thousands of years.

All that is to say that as tiny as this waste volume is, we have the technological capability today to effectively reduce it by another 90% or more atleast. It's purely a problem of politics and economic incentives. From a technological perspective we've already solved all of the problems with nuclear power.