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Antares Achieves Criticality of Mark-0 Reactor

https://antaresindustries.com/updates/antares-achieves-criticality
31•clarionbell•2h ago

Comments

ggm•1h ago
TRISO fuel so.. pebble bed? Is there a reluctance to market on this? The Chinese were all-in.

Great to see engineering deliver on time. I wonder if Rolls Royce will also have a smooth ride. It's a PWR.

chickenbig•1h ago
Prismatic (or cylindrical) TRISO also makes sense. There are lots of potential problems using pebble beds (circulation, grinding), whereas doing regular refuelling cycles avoids them, in exchange for down-time to refuel.
seanhunter•1h ago
Congrats to everyone involved. This is a pretty awesome milestone
mDyJzDPmBdG•40m ago
To add a bit of context there were 11 companies participating in program and only 2 achieved critiality, and the deadline included in "DOE Reactor Pilot Program" was "July 4, 2026", and Aalo Atomics is the only one that might also make it in time.
sfn42•19m ago
> "The Trump administration is proud to support the rebirth of America’s nuclear industry and ensuring Americans have access to affordable, reliable and secure energy for generations to come."

> "The demonstration and the licensing pathway it establishes represent a key step toward deploying electricity-producing microreactors for U.S. military installations by September 30, 2028."

So which is it? Power to the people or power to the military? This microreactor concept doesn't seem very well suited for commercial use.

roenxi•13m ago
Why would microreactor concepts not be suitable for commercial use? History is overwhelmed with examples of large, rare and expensive tech being produced in small cheap packages and becoming massive commercial successes that make the old way look primitive.
sfn42•5m ago
Because large scale production is generally more scalable and efficient. And you probably don't want dozens of "microreactors" scattered across cities.
ablation•12m ago
"Antares is a nuclear fission energy company developing compact microreactors for defense and space applications"
Traubenfuchs•13m ago
I am still quite confused on the scientific consensus:

Should we double down on renewable energy and solve its issues with lots of batteries or should we invest in next generation nuclear energy?

Both at the same time?

Does anyone know?

datakan•12m ago
Both at the same time. I don't see how putting all our eggs in a single basket benefits us.
preisschild•10m ago
Government should tax / provide incentives based on environmental impact and let the free market decide

https://unece.org/sites/default/files/2022-04/LCA_3_FINAL%20...

I think a low carbon mix will result in the cheapest, most reliable and cleanest energy grid.

bevekspldnw•5m ago
When it comes to avoiding the worst impacts of the current catastrophic path we’re on, “nothing will work, but everything might”.

Do it all.

European digital ID wallets are a gift to Google and Apple

https://waag.org/en/article/european-digital-id-wallets-are-gift-google-and-apple/
87•donohoe•56m ago•37 comments

Building a custom octocopter from scratch with no prior hardware experience

https://karolina.mgdubiel.com/drone/
66•noleary•2d ago•15 comments

Open Source Low Tech

https://opensourcelowtech.org/
297•grep_it•4d ago•61 comments

Exercise intensity influences body composition in healthy older adults

https://www.maturitas.org/article/S0378-5122(25)00571-7/fulltext
13•bookofjoe•1h ago•8 comments

Should every baby's DNA be sequenced?

https://www.economist.com/science-and-technology/2026/06/29/should-every-babys-dna-be-sequenced
9•nedruod•29m ago•5 comments

Antares Achieves Criticality of Mark-0 Reactor

https://antaresindustries.com/updates/antares-achieves-criticality
31•clarionbell•2h ago•13 comments

Qwen 3.6 27B is the sweet spot for local development

https://quesma.com/blog/qwen-36-is-awesome/
962•stared•18h ago•629 comments

Sony erases digital content from libraries; reminded we don't own what we buy

https://arstechnica.com/gadgets/2026/06/sony-erases-digital-content-from-libraries-were-reminded-...
27•pseudolus•30m ago•5 comments

.self: A new top-level domain designed to support self-hosting

https://hccf.onmy.cloud/2026/06/21/reclaiming-our-digital-selves-hccfs-vision-for-a-human-centere...
540•HumanCCF•15h ago•313 comments

Parse, Don't Validate – In a Language That Doesn't Want You To

https://cekrem.github.io/posts/parse-dont-validate-typescript/
7•fagnerbrack•44m ago•1 comments

Free the Icons

https://weblog.rogueamoeba.com/2026/06/26/free-the-icons/
505•zdw•2d ago•153 comments

The operating cost starts after the demo

https://twoheads.net/the-promise-is-unattended-work/
30•hellokfk•4d ago•14 comments

Memory Safe Context Switching

https://fil-c.org/context_switches
146•modeless•10h ago•25 comments

LongCat-2.0, a large-scale MoE model with 1.6T total and 48B Active

https://longcat.chat/blog/longcat-2.0/
170•benjiro29•11h ago•45 comments

Rocketlab acquires Iridium

https://investors.rocketlabcorp.com/news-releases/news-release-details/rocket-lab-acquire-iridium...
419•everfrustrated•21h ago•277 comments

Exploring PDP-1 Lisp (1960)

https://obsolescence.dev/pdp1-lisp-introduction.html
84•ozymandiax•10h ago•21 comments

Old Computer Challenge

http://occ.sdf.org/
72•wrxd•2d ago•30 comments

Linux for the Sega MegaDrive

https://github.com/LinuxMD/linuxmd
129•HardwareLust•20h ago•15 comments

Ornith-1.0: self-improving open-source models for agentic coding

https://github.com/deepreinforce-ai/Ornith-1
218•danboarder•18h ago•40 comments

One million passports leaked online

https://www.theverge.com/tech/947157/passports-data-breach-cannabis-club-systems-nefos-puffpal
299•jruohonen•2d ago•186 comments

How to corrupt an SQLite database file

https://www.sqlite.org/howtocorrupt.html
95•tosh•3d ago•18 comments

US Supreme Court rules geofence warrants require constitutional protections

https://www.theguardian.com/us-news/2026/jun/29/supreme-court-geofence-warrants-case-decision
538•cdrnsf•19h ago•250 comments

30-year sentence for transporting zines is a five-alarm fire for free speech

https://theintercept.com/2026/06/26/daniel-sanchez-estrada-zines-prairieland-free-speech/
612•xrd•1d ago•349 comments

Alan Kay on the meaning of "object-oriented programming" (2003)

https://notes.shixiangxi.com/en/docs/appendix/alan-kay-on-oop/
77•sxx0•2d ago•45 comments

Zig – SPIR-V Backend Progress

https://ziglang.org/devlog/2026/#2026-06-26
75•Retro_Dev•4d ago•38 comments

Apple Neural Engine: Architecture, Programming, and Performance

https://arxiv.org/abs/2606.22283
185•Jimmc414•2d ago•25 comments

Why Problem Statements Aren't Enough

https://letters.unchartedpathbreakthroughs.com/posts/why-problem-statements-arent-enough
3•mooreds•4d ago•1 comments

Dark Sky Lighting

https://www.savingourstars.org/darkskylighting#whatisdarkskylighting
216•alexandrehtrb•4d ago•40 comments

A native graphical shell for SSH

https://probablymarcus.com/blocks/2026/06/28/native-graphical-shell-for-SSH.html
323•mrcslws•19h ago•186 comments

What happens when you run a CUDA kernel?

https://fergusfinn.com/blog/what-happens-when-you-run-a-gpu-kernel/
265•mezark•22h ago•31 comments