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Advanced nuclear

Pilotmomentum 65370 papers in 3 months (-19% yearly)$5.2B raised in 12 months20 companies

New fission reactor designs, smaller or using new coolants and fuels, meant to be cheaper, safer and faster to build.

Why pilot: Four advanced test reactors reached criticality by July 4, 2026, and TerraPower began building Kemmerer Unit 1 under an NRC permit. Jul 25, 2026

Papers per monthOpenAlex journal and conference papers; January includes papers dated by year only; the last two months are still filling in
0260519Sep 24Mar 25Sep 25Mar 26

Dots under a month: dated events tracked here that month.

22 events

DateEvent
Sep 2026
Sep 24TRISO-X completes vertical construction of TX-1 fuel plantx-energy.com· Milestone
Sep 22Department of Energy Provides Rare Salt Material to Natura ResourcesDOE Office of Nuclear Energy· AnnouncementUnverified
Sep 21Samsung C&T to invest up to $100 million in Kairos Powerkairospower.com· Deal
Sep 16Westinghouse eVinci Microreactor Achieves Criticality MilestoneDOE Office of Nuclear Energy· BreakthroughUnverified
Sep 15UK directs regulators to review X-energy's Xe-100x-energy.com· Policy
Sep 11Oklo filed an 8-K: entered a material agreementSEC EDGAR· DealUnverified
Sep 10Deep Fission installs and retrieves full-scale reactor canisterdeepfission.com· Milestone
Sep 9More than a Decade of Data to Ensure a Lifetime of Reactor SafetyDOE Office of Nuclear Energy· AnnouncementUnverified
Aug 2026
Aug 6Oklo's Groves test reactor reaches first criticalityoklo.com· Milestone
Jul 2026
Jul 30Crusoe and Aalo partner on a nuclear-powered AI data centeraalo.com· Deal
Jul 23DOE authorizes startup of Oklo's Groves reactoroklo.com· Policy
Jul 16Kairos completes KP-BISON fuel code validationkairospower.com· Milestone
Jul 4Aalo-X reaches criticality, the fourth pilot reactoraalo.com· Milestone
Jun 2026
Jun 18Valar Atomics Ward 250 reaches criticality in Utahenergy.gov· Milestone
Jun 4Antares Mark-0 is first pilot program reactor to reach criticalityantaresindustries.com· Breakthrough
Jun 2X-energy submits Xe-100 for UK Generic Design Assessmentx-energy.com· Milestone
May 2026
May 28DOE approves Last Energy PWR-5 preliminary safety analysislastenergy.com· Policy
May 20NRC accepts KRONOS microreactor construction permit applicationnanonuclearenergy.com· Policy
Apr 2026
Apr 24X-energy begins trading on Nasdaqx-energy.com· Milestone
Apr 23TerraPower starts nuclear construction at Kemmerer, Wyomingterrapower.com· Milestone
Mar 2026
Mar 4NRC approves construction permit for Natrium Kemmerer Unit 1terrapower.com· Policy
Jan 2026
Jan 9Meta agrees to support up to eight TerraPower Natrium plantsterrapower.com· Deal
About advanced nuclear here
Sub-areas
Light-water small modular reactors, Microreactors, Sodium-cooled fast reactors, High-temperature gas reactors, Molten salt reactors, Advanced fuel (HALEU, TRISO), Underground reactors
Stage evidence
Pilot, Jul 25, 2026: Four advanced test reactors reached criticality by July 4, 2026, and TerraPower began building Kemmerer Unit 1 under an NRC permit. energy.gov
Momentum
65 of 100: the mean of its ranks among the tracked fields for paper growth (13), funding in 12 months (88) and events in 90 days (94). Method
Papers
1,627 in the 12 months ending two months ago, -19% against the 12 before (OpenAlex topics, journal and conference papers).
Tracked here since
Sep 25, 2026

Changes to this field

DateChange
Sep 25, 2026Advanced nuclearTechnology: Name, Advanced nuclear (was Advanced nuclear fission)

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