Nick Touran
@whatisnuclear.com
2.4K followers 1.5K following 710 posts
Ph.D./P.E. nuclear engineer and nuclear educator who runs https://whatisnuclear.com. Thinks about how to deliver nuclear power reliably and cheaply, advanced reactors, reactor history, energy.
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whatisnuclear.com
Lol really? I love that that's even an option.
whatisnuclear.com
Can't reply on the post for some reason... but after 3 years of shutdown it does not take that much cooling to keep the spent fuel cooled. Something like a garden hose of water going in should suffice. I'm not super worried about it.
umpft.bsky.social
@whatisnuclear.com @energybants.bsky.social
What are the chances for a meltdown after years of cooling? Thanks!
whatisnuclear.com
Taking a Geiger counter on a flight with the sound on is a great way to get some serious side-eye from your neighbors, maybe leading to a good discussion about dose rate
whatisnuclear.com
The only radiation that comes near water in a water-cooled reactor is in a closed loop so I'm not sure what you're getting at.
whatisnuclear.com
It's a true miracle of nature that water is both a good neutron moderator and reactor coolant. Its ability to moderate and cool at the same time is quite underappreciated in today's pro-nuclear circles.
whatisnuclear.com
Pretty neat model of a PWR from the 1965 Boy Scouts Atomic Energy merit badge book. Honestly, building this would help kids understand quite a bit about a reactor.
model reactor from boy scouts https://archive.org/details/atomicenergy00boys/page/n1/mode/2up
whatisnuclear.com
Looking into the core of BORAX-5, which pushed the limits of what a BWR could do: nuclear superheat and natural circulation. The superheat region is in the center. BWRs today are not so bold as to superheat steam. Have materials improved enough to try again? Probably!
Looking into the BORAX-5 nuclear reactor core
whatisnuclear.com
Absolutely. Checking out card printing deals now.
whatisnuclear.com
😊 Draft field definitions in YAML format here: github.com/whatisnuclea...
github.com
whatisnuclear.com
yeah... very gross but drives the point home! Those screw worms are coming back now!
whatisnuclear.com
Getting these 45 historical nuclear films from 1955-83 dug up and digitized has been one of the coolest and most rewarding things I've done with What is Nuclear. Thanks to you all for your interest and support in this project!

There are only ~100 left to get.

whatisnuclear.com/museum/
Screenshot of some nuclear films Screenshot of some nuclear films Screenshot of some nuclear films Screenshot of some nuclear films
whatisnuclear.com
For all you Anki users out there (free spaced repetition learning app), I made a deck for memorizing the US Nuclear Power Plants. Planning to expand it more later but it's starting out with just the operational commercial units. ENJOY! github.com/whatisnuclea...
GitHub - whatisnuclear/nuclear-plant-anki-deck: Anki cards for memorizing info about nuclear power plants
Anki cards for memorizing info about nuclear power plants - whatisnuclear/nuclear-plant-anki-deck
github.com
whatisnuclear.com
I'd think so, but empirical observation suggests that there is unlimited funding available for nuclear startups, regardless of setbacks and issues. People with money fricking love investing in nuclear.
whatisnuclear.com
Observation: the actions that get more investors to buy into your nuclear company are currently the opposite of those needed to develop an economical, operable, maintainable, and safe nuclear plant.

Anyone have ideas about how to bring these back into alignment?
whatisnuclear.com
Yes! The founder said you could hold it and get no more dose than a typical CT scan. When prodded, he qualified that he meant after 30 days cooling (which... is not enough to make it safe...) and produced a comically flawed calc report.
whatisnuclear.com
CNA in Singapore produced a nuclear power documentary called "The Nuclear Option" that you can watch online. They visited many key places and talked to lots of people. It came together super well! www.youtube.com/playlist?lis...
The Nuclear Option - YouTube
www.youtube.com
whatisnuclear.com
As a penance I added CANDU to the scoping tool whatisnuclear.com/neutronics-s...
whatisnuclear.com
Sorry that was a follow-up to the last tweet. It's Preliminary Pile Assembly bsky.app/profile/did:...
whatisnuclear.com
Here's Preliminary Pile Assembly-19, where rotating control drums were first mocked up in a critical facility around 1951. Note the six smaller hexagon outlines on each corner of the central hex, each of which represents a control drum.
ppa-19 circa 1951 https://doi.org/10.2172/348907
whatisnuclear.com
This is just a low-power easy-to-reconfigure critical mockup to verify the calculations and do design optimization. In the real system it would be an actual rotating drum.
real control drum design  https://babel.hathitrust.org/cgi/pt?id=mdp.39015001554800&seq=216&view=1up
whatisnuclear.com
Beryllium triflute that fit between the pins in the PPA.

Who's working on beryllium triflutes today?!
beryllium triflute https://babel.hathitrust.org/cgi/pt?id=mdp.39015001554800&seq=72&view=1up