Joel McDuffee

Joel McDuffee

@mcduffee.bsky.social

Nuclear engineer by day. Current and former hobbies include hiking, beekeeping, woodworking, 3D printing, reading histories, programming, feeding birds, and fencing (swords not posts).

186 followers288 following41 posts

Dave Stutler as played by Jay Baruchel and Hiccup voiced by Jay Baruchel. I realize that seems like cheating, but they are the same character in virtually every way. I guess he didn't have time between them to prep for a different movie so he just repeated the character and it worked!

Sophia_Nyx 🐰@sophianyx.bsky.social

Name two characters you think are the same person.

Joel McDuffee reposted

A male rock ptarmigan (Lagopus muta) in winter plumage. Ptarmigan is from Gaelic 'tarmachan' meaning "croaker". The p- was added when people mistakenly assumed it was a Greek word. A bird forever warning people: "A werewolf!" (just in case of werewolves).

My daughter gifted me this subscription last Christmas, and getting the print edition is a highlight of my month. I love irreverent humor, and I still laugh about the "soldier jumps on a grenade just makes it worse" story. Thanks, Tim. bsky.app/profile/benc...

Ben Collins@bencollins.bsky.social

Folks! Today is the last day to take advantage of The Onion's Black Friday sale. For $75, you get a year of newspapers shipped monthly to your actual house. First one arrives by Christmas, and the middle of the December issue is wrapping paper. Sign up! It's good! membership.theonion.com

One more picture from our Roan Mountain excursion. This flaming azalea was in full bloom on the Appalachian Trail near Carvers Gap. If you look closely, you’ll see a rainstorm on the mountain behind.

We went to Roan Mountain yesterday at the height of the rhododendron bloom, and it did not disappoint. But the Helene damaged areas were a striking contrast. Storm microbursts destroyed certain areas but left neighboring spots untouched.

Joel McDuffee reposted

Spell it "doughnought" (meaning a zero or "nought" made from dough) or modernize it altogether to "donut," but I can see no case at all for going only halfway to "doughnut."

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That's an entire swimming pool volume that we push into the vessel every minute. The flow rate is about 50 feet per second. With a 2' core length, the transit time for the coolant is just 0.04 seconds, and in that short time the temperature goes up 35ºF. 5/6

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How do we keep it cool with all that power? Using what I think is one of the coolest features of HFIR and one that is rare in the nuclear reactor world -- involute fuel plates! There are hundreds of individual fuel plates, and each is curved so that the coolant gap is constant everywhere. 3/6

If we just had straight plates, the coolant channel would be larger near the outer radius and all the coolant flow would go there. The curved plates also provide hydraulic stability in the turbulent flow. How much flow? 16,000 gallons per minute. No, I didn't forget a decimal point. 4/6

HFIR is a special for a lot of reasons, but the main one is a ridiculously high power density. We generate 85 MW in a volume equal to maybe a half of a 55 gal drum. High power density means high neutron density, which is how we make critical medical isotopes that can't be made anywhere else. 2/6

I filled my bird feeders for the first time in a couple of weeks due to travel. This cardinal was the first to find it, and he’s sitting on his personal hoard, unbothered, like a dragon laying on his gold.

My wife and I honeymooned in Highlands NC 30 years ago (plus a few days). We’re here again for a short weekend trip. It’s a pretty little tourist town with nice restaurants and some of the best waterfalls you’ve ever seen.

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