https://pranava0x0.github.io/nucleardeployment/updates/ Dated evidence events for U.S. new-design nuclear: criticalities, construction starts, permits, raises, awards, and loans. Each item links the document behind it. Dates keep the source's own precision in the title. en-us Thu, 06 Aug 2026 12:00:00 GMT https://oklo.com/newsroom/news-details/2026/Oklos-Groves-Reactor-Achieves-First-Criticality-in-Under-a-Year/default.aspx https://oklo.com/newsroom/news-details/2026/Oklos-Groves-Reactor-Achieves-First-Criticality-in-Under-a-Year/default.aspx#2026-08-06#Criticality#Groves reached first criticality in Cald Thu, 06 Aug 2026 12:00:00 GMT A zero-power critical assembly. DOE's environmental determination puts its maximum power at 100 watts, and Oklo states it does not generate electricity for the grid. Contributes 0 MWe. · Proof event · Criticality · Company-reported. https://www.valaratomics.com/docs/Announcing-our-1B-Series-B-Led-By-Sequoia https://www.valaratomics.com/docs/Announcing-our-1B-Series-B-Led-By-Sequoia#2026-08#Venture equity#$1B Series B at a $6B valuation Sat, 01 Aug 2026 12:00:00 GMT Sequoia Capital (lead) · Capital event · Venture equity · Company-reported. https://www.valaratomics.com/docs/Announcing-our-1B-Series-B-Led-By-Sequoia https://www.valaratomics.com/docs/Announcing-our-1B-Series-B-Led-By-Sequoia#2026-08#Venture debt#$200M credit facility, announced alongsi Sat, 01 Aug 2026 12:00:00 GMT Erebor Bank (lead), J.P. Morgan, Crescent Cove, Hercules Capital · Capital event · Venture debt · Company-reported. https://www.energy.gov/articles/department-energy-celebrates-fourth-criticality-ahead-july-4th-goal https://www.energy.gov/articles/department-energy-celebrates-fourth-criticality-ahead-july-4th-goal#2026-07-04#Criticality#Critical Test Reactor reached initial cr Sat, 04 Jul 2026 12:00:00 GMT Zero-power test reactor. Contributes 0 MWe. · Proof event · Criticality · Government-reported. https://www.energy.gov/articles/us-department-energy-meets-president-trumps-goal-delivers-third-advanced-reactor https://www.energy.gov/articles/us-department-energy-meets-president-trumps-goal-delivers-third-advanced-reactor#2026-07-01#Criticality#Unity reached initial criticality at the Wed, 01 Jul 2026 12:00:00 GMT Demonstration reactor. Contributes 0 MWe. · Proof event · Criticality · Government-reported. https://oklo.com/newsroom/news-details/2026/Oklo-Receives-U-S--Department-of-Energy-Startup-Authorization-for-Groves-Reactor-Clearing-Way-for-Fuel-Loading-and-First-Criticality/default.aspx https://oklo.com/newsroom/news-details/2026/Oklo-Receives-U-S--Department-of-Energy-Startup-Authorization-for-Groves-Reactor-Clearing-Way-for-Fuel-Loading-and-First-Criticality/default.aspx#2026-07#Permit / authorization#DOE issued startup authorization for the Wed, 01 Jul 2026 12:00:00 GMT Proof event · Permit / authorization · Company-reported. https://www.radiantnuclear.com/blog/triso-fuel-inl/ https://www.radiantnuclear.com/blog/triso-fuel-inl/#2026-07#Fuel milestone#First TRISO fuel shipment received at th Wed, 01 Jul 2026 12:00:00 GMT Proof event · Fuel milestone · Company-reported. https://www.deepfission.com/pr-media-kit/press-releases/detail/114/deep-fission-prototype-reactor-canister-arrives-at-kansas-site-advancing-reactor-proof-of-concept-program https://www.deepfission.com/pr-media-kit/press-releases/detail/114/deep-fission-prototype-reactor-canister-arrives-at-kansas-site-advancing-reactor-proof-of-concept-program#2026-07#Test program#An unfuelled prototype reactor canister Wed, 01 Jul 2026 12:00:00 GMT Proof event · Test program · Company-reported. https://www.washingtontechnology.com/companies/2026/07/antares-fetches-470m-move-military-base-reactor-push/415052/ https://www.washingtontechnology.com/companies/2026/07/antares-fetches-470m-move-military-base-reactor-push/415052/#2026-07#Program selection / agreement#One of three finalists competing for Air Wed, 01 Jul 2026 12:00:00 GMT Proof event · Program selection / agreement · Press-reported. https://www.sec.gov/Archives/edgar/data/0002104277/000119312526301023/d40440ds1.htm https://www.sec.gov/Archives/edgar/data/0002104277/000119312526301023/d40440ds1.htm#2026-07#Offering filed#Public S-1 filed; terms not priced Wed, 01 Jul 2026 12:00:00 GMT Nasdaq, targeting ticker HNUC · Capital event · Offering filed · Verified. https://www.bloomberg.com/news/articles/2026-07-31/nuclear-tech-firm-westinghouse-files-confidentially-for-ipo https://www.bloomberg.com/news/articles/2026-07-31/nuclear-tech-firm-westinghouse-files-confidentially-for-ipo#2026-07#Offering filed#Confidential draft S-1 filed; share coun Wed, 01 Jul 2026 12:00:00 GMT Not disclosed · Capital event · Offering filed · Press-reported. https://www.washingtontechnology.com/companies/2026/07/antares-fetches-470m-move-military-base-reactor-push/415052/ https://www.washingtontechnology.com/companies/2026/07/antares-fetches-470m-move-military-base-reactor-push/415052/#2026-07#Venture equity#$370M equity within a $470M Series C Wed, 01 Jul 2026 12:00:00 GMT Paradigm and Caffeinated Capital · Capital event · Venture equity · Press-reported. https://www.washingtontechnology.com/companies/2026/07/antares-fetches-470m-move-military-base-reactor-push/415052/ https://www.washingtontechnology.com/companies/2026/07/antares-fetches-470m-move-military-base-reactor-push/415052/#2026-07#Venture debt#$100M debt within the same $470M Series Wed, 01 Jul 2026 12:00:00 GMT Not disclosed · Capital event · Venture debt · Press-reported. https://www.energy.gov/articles/department-energy-celebrates-second-advanced-reactor-achieving-criticality https://www.energy.gov/articles/department-energy-celebrates-second-advanced-reactor-achieving-criticality#2026-06-18#Criticality#Ward 250 reached fuelled criticality in Thu, 18 Jun 2026 12:00:00 GMT Ran at 100 kWt, a zero-power demonstration. Contributes 0 MWe. · Proof event · Criticality · Government-reported. https://www.army.mil/article/293057/antares_nuclears_successful_zero_power_criticality_test_marks_major_step_for_military_applications_of_advanced_microreactors https://www.army.mil/article/293057/antares_nuclears_successful_zero_power_criticality_test_marks_major_step_for_military_applications_of_advanced_microreactors#2026-06-04#Criticality#Mark-0 reached initial criticality at Id Thu, 04 Jun 2026 12:00:00 GMT Zero-power demonstrator. Contributes 0 MWe. · Proof event · Criticality · Government-reported. https://www.energy.gov/nepa/articles/cx-271014-groves-1-project https://www.energy.gov/nepa/articles/cx-271014-groves-1-project#2026-06#Permit / authorization#DOE issued a categorical exclusion deter Mon, 01 Jun 2026 12:00:00 GMT Describes a zero-power critical assembly with a maximum power level of 100 watts. Contributes 0 MWe. · Proof event · Permit / authorization · Government-reported. https://www.ans.org/news/2026-06-29/article-8155/holtec-and-edf-submit-proposal-to-deploy-smr300-at-cottam-nottinghamshire/ https://www.ans.org/news/2026-06-29/article-8155/holtec-and-edf-submit-proposal-to-deploy-smr300-at-cottam-nottinghamshire/#2026-06#Design proof (non-U.S.)#Holtec and EDF submitted a joint proposa Mon, 01 Jun 2026 12:00:00 GMT UK proposal. Contributes 0 MWe to the U.S. race. · Proof event · Design proof (non-U.S.) · Press-reported. https://info.westinghousenuclear.com/news/westinghouse-announces-department-of-energy-partnership-to-jumpstart-large-scale-nuclear-supply-chain https://info.westinghousenuclear.com/news/westinghouse-announces-department-of-energy-partnership-to-jumpstart-large-scale-nuclear-supply-chain#2026-06#Federal loan#$17.5B conditional commitment, scoped to Mon, 01 Jun 2026 12:00:00 GMT EXIM and DOE Office of Energy Dominance Financing · Capital event · Federal loan · Company-reported. https://www.gurufocus.com/news/8922229/deep-fission-fisn-prices-ipo-at-16-raising-40-million https://www.gurufocus.com/news/8922229/deep-fission-fisn-prices-ipo-at-16-raising-40-million#2026-06#IPO / listing#$40M gross at $16/share, scaled back fro Mon, 01 Jun 2026 12:00:00 GMT Nasdaq (FISN) · Capital event · IPO / listing · Press-reported. https://www.federalregister.gov/documents/2026/05/18/2026-09880/in-the-matter-of-kairos-power-llc-hermes-test-reactor-extension-of-latest-date-for-completion-of https://www.federalregister.gov/documents/2026/05/18/2026-09880/in-the-matter-of-kairos-power-llc-hermes-test-reactor-extension-of-latest-date-for-completion-of#2026-05#Permit / authorization#NRC extended the Hermes 1 construction-c Fri, 01 May 2026 12:00:00 GMT Proof event · Permit / authorization · Verified. https://www.nucnet.org/news/us-doe-approves-pdsa-for-last-energy-pilot-nuclear-reactor-at-texas-university-5-5-2026 https://www.nucnet.org/news/us-doe-approves-pdsa-for-last-energy-pilot-nuclear-reactor-at-texas-university-5-5-2026#2026-05#Permit / authorization#DOE approved the PWR-5 preliminary docum Fri, 01 May 2026 12:00:00 GMT Proof event · Permit / authorization · Press-reported. https://www.globenewswire.com/news-release/2026/05/20/3298411/0/en/NANO-Nuclear-s-KRONOS-MMR-and-the-University-of-Illinois-Urbana-Champaign-Advance-to-Next-Regulatory-Milestone-as-U-S-NRC-Formally-Accepts-Construction-Permit-Application-for-Revie.html https://www.globenewswire.com/news-release/2026/05/20/3298411/0/en/NANO-Nuclear-s-KRONOS-MMR-and-the-University-of-Illinois-Urbana-Champaign-Advance-to-Next-Regulatory-Milestone-as-U-S-NRC-Formally-Accepts-Construction-Permit-Application-for-Revie.html#2026-05#Permit / authorization#NRC formally accepted the KRONOS constru Fri, 01 May 2026 12:00:00 GMT Proof event · Permit / authorization · Company-reported. https://www.tipranks.com/news/oklo-is-about-to-report-q2-earnings-heres-what-to-expect-from-the-nuclear-energy-stock https://www.tipranks.com/news/oklo-is-about-to-report-q2-earnings-heres-what-to-expect-from-the-nuclear-energy-stock#2026-05#Public offering#Up to $1B at-the-market program, replaci Fri, 01 May 2026 12:00:00 GMT Public markets · Capital event · Public offering · Press-reported. https://www.terrapower.com/TerraPower-Commences-Construction-on-Americas-First-Utility-Scale-Advanced-Nuclear-Power-Plant https://www.terrapower.com/TerraPower-Commences-Construction-on-Americas-First-Utility-Scale-Advanced-Nuclear-Power-Plant#2026-04#Construction start#Nuclear construction began at Kemmerer w Wed, 01 Apr 2026 12:00:00 GMT Proof event · Construction start · Company-reported. https://www.kairospower.com/updates/kairos-power-breaks-ground-on-hermes-2-demonstration-plant https://www.kairospower.com/updates/kairos-power-breaks-ground-on-hermes-2-demonstration-plant#2026-04#Construction start#Groundbreaking at Hermes 2, the first po Wed, 01 Apr 2026 12:00:00 GMT Proof event · Construction start · Company-reported. https://oodaloop.com/briefs/technology/valar-atomics-begins-construction-on-ward-250-nuclear-reactor-utah/ https://oodaloop.com/briefs/technology/valar-atomics-begins-construction-on-ward-250-nuclear-reactor-utah/#2026-04#Permit / authorization#DOE approved the final documented safety Wed, 01 Apr 2026 12:00:00 GMT Proof event · Permit / authorization · Press-reported. https://inl.gov/news-release/national-reactor-innovation-center-announces-first-selections-for-nuclear-energy-launch-pad/ https://inl.gov/news-release/national-reactor-innovation-center-announces-first-selections-for-nuclear-energy-launch-pad/#2026-04#Program selection / agreement#Named one of the first four developers i Wed, 01 Apr 2026 12:00:00 GMT Proof event · Program selection / agreement · Government-reported. https://techcrunch.com/2026/04/24/x-energy-stock-pops-27-on-first-day-of-trading-following-upsized-ipo/ https://techcrunch.com/2026/04/24/x-energy-stock-pops-27-on-first-day-of-trading-following-upsized-ipo/#2026-04#IPO / listing#~$1.018B gross at $23.00/share Wed, 01 Apr 2026 12:00:00 GMT Nasdaq Global Select Market · Capital event · IPO / listing · Press-reported. https://www.terrapower.com/NRC-Approves-Natrium-Reactor-Construction-Permit https://www.terrapower.com/NRC-Approves-Natrium-Reactor-Construction-Permit#2026-03#Permit / authorization#NRC issued construction permit CPAR-1, t Sun, 01 Mar 2026 12:00:00 GMT Proof event · Permit / authorization · Company-reported. https://www.nucnet.org/news/opg-completes-excavation-works-at-darlington-bwrx-300-smr-project-3-1-2026 https://www.nucnet.org/news/opg-completes-excavation-works-at-darlington-bwrx-300-smr-project-3-1-2026#2026-03#Design proof (non-U.S.)#Shaft excavation completed for the first Sun, 01 Mar 2026 12:00:00 GMT Canadian unit. Contributes 0 MWe to the U.S. race. · Proof event · Design proof (non-U.S.) · Press-reported. https://npre.illinois.edu/news/stories/imdp-cpa https://npre.illinois.edu/news/stories/imdp-cpa#2026-03#Permit / authorization#The University of Illinois, with NANO Nu Sun, 01 Mar 2026 12:00:00 GMT A non-power research reactor. Contributes 0 MWe. · Proof event · Permit / authorization · Institution-reported. https://theaiworld.org/news/valar-atomics-raises-450m-to-power-ai-data-centres https://theaiworld.org/news/valar-atomics-raises-450m-to-power-ai-data-centres#2026-03#Venture equity#$340M equity within a $450M round at a $ Sun, 01 Mar 2026 12:00:00 GMT Not disclosed · Capital event · Venture equity · Press-reported. https://theaiworld.org/news/valar-atomics-raises-450m-to-power-ai-data-centres https://theaiworld.org/news/valar-atomics-raises-450m-to-power-ai-data-centres#2026-03#Venture debt#$110M debt within the same $450M round Sun, 01 Mar 2026 12:00:00 GMT Not disclosed · Capital event · Venture debt · Press-reported. https://www.radiantnuclear.com/blog/doe-pdsa-approval/ https://www.radiantnuclear.com/blog/doe-pdsa-approval/#2026-02#Permit / authorization#DOE approved the Kaleidos preliminary do Sun, 01 Feb 2026 12:00:00 GMT Proof event · Permit / authorization · Company-reported. https://www.energy.gov/ne/articles/triso-x-receives-nrc-special-nuclear-material-license-advanced-fuel-fabrication https://www.energy.gov/ne/articles/triso-x-receives-nrc-special-nuclear-material-license-advanced-fuel-fabrication#2026-02#Permit / authorization#NRC issued TRISO-X a 40-year special nuc Sun, 01 Feb 2026 12:00:00 GMT Proof event · Permit / authorization · Government-reported. https://www.world-nuclear-news.org/articles/final-investment-decision-taken-for-romanias-smrs https://www.world-nuclear-news.org/articles/final-investment-decision-taken-for-romanias-smrs#2026-02#Design proof (non-U.S.)#RoPower took a final investment decision Sun, 01 Feb 2026 12:00:00 GMT Romanian project. Contributes 0 MWe to the U.S. race. · Proof event · Design proof (non-U.S.) · Press-reported. https://www.energy.gov/ne/articles/energy-department-announces-first-microreactor-experiments-dome-test-bed https://www.energy.gov/ne/articles/energy-department-announces-first-microreactor-experiments-dome-test-bed#2026-02#Program selection / agreement#DOE conditionally selected Westinghouse Sun, 01 Feb 2026 12:00:00 GMT Proof event · Program selection / agreement · Government-reported. https://www.nucnet.org/news/oak-ridge-lab-signs-usd27m-deal-with-kairos-power-for-advanced-reactor-development-2-5-2026 https://www.nucnet.org/news/oak-ridge-lab-signs-usd27m-deal-with-kairos-power-for-advanced-reactor-development-2-5-2026#2026-02#Federal award#$27M agreement Sun, 01 Feb 2026 12:00:00 GMT Oak Ridge National Laboratory · Capital event · Federal award · Press-reported. https://ir.terrestrialenergy.com/news-releases/news-release-details/terrestrial-energy-executes-doe-agreement-project-tetra-under https://ir.terrestrialenergy.com/news-releases/news-release-details/terrestrial-energy-executes-doe-agreement-project-tetra-under#2026-01#Program selection / agreement#Executed a DOE Other Transaction Agreeme Thu, 01 Jan 2026 12:00:00 GMT Proof event · Program selection / agreement · Company-reported. https://oklo.com/newsroom/news-details/2025/Oklo-and-Los-Alamos-National-Lab-Conduct-Fast-Spectrum-Plutonium-Criticality-Experiment/default.aspx https://oklo.com/newsroom/news-details/2025/Oklo-and-Los-Alamos-National-Lab-Conduct-Fast-Spectrum-Plutonium-Criticality-Experiment/default.aspx#2025-12#Test program#Fast-spectrum plutonium criticality expe Mon, 01 Dec 2025 12:00:00 GMT Research collaboration, not a licensed power reactor. Contributes 0 MWe. · Proof event · Test program · Company-reported. https://holtecinternational.com/hh-40-24/ https://holtecinternational.com/hh-40-24/#2025-12#Federal award#$400M Tier 1 milestone-based cost share Mon, 01 Dec 2025 12:00:00 GMT DOE Gen III+ SMR Pathway to Deployment · Capital event · Federal award · Company-reported. https://www.ans.org/news/2025-12-03/article-7593/doe-selects-tva-and-holtec-for-smr-awards/ https://www.ans.org/news/2025-12-03/article-7593/doe-selects-tva-and-holtec-for-smr-awards/#2025-12#Federal award#Up to $400M Tier 1 award to TVA for Clin Mon, 01 Dec 2025 12:00:00 GMT DOE Gen III+ SMR Pathway to Deployment · Capital event · Federal award · Press-reported. https://www.bloomberg.com/news/articles/2025-12-17/nuclear-startup-radiant-raises-300-million-for-small-reactors https://www.bloomberg.com/news/articles/2025-12-17/nuclear-startup-radiant-raises-300-million-for-small-reactors#2025-12#Venture equity#$300M+ Series D at a valuation above $1. Mon, 01 Dec 2025 12:00:00 GMT Draper Associates and Boost VC · Capital event · Venture equity · Press-reported. https://www.businesswire.com/news/home/20251202017776/en/Antares-Raises-$96-Million-in-Series-B-Funding-to-Accelerate-Nuclear-Microreactor-Development https://www.businesswire.com/news/home/20251202017776/en/Antares-Raises-$96-Million-in-Series-B-Funding-to-Accelerate-Nuclear-Microreactor-Development#2025-12#Venture equity#$71M equity within a $96M Series B Mon, 01 Dec 2025 12:00:00 GMT Shine Capital · Capital event · Venture equity · Company-reported. https://www.businesswire.com/news/home/20251202017776/en/Antares-Raises-$96-Million-in-Series-B-Funding-to-Accelerate-Nuclear-Microreactor-Development https://www.businesswire.com/news/home/20251202017776/en/Antares-Raises-$96-Million-in-Series-B-Funding-to-Accelerate-Nuclear-Microreactor-Development#2025-12#Venture debt#$25M debt within the same $96M Series B Mon, 01 Dec 2025 12:00:00 GMT Not disclosed · Capital event · Venture debt · Company-reported. https://techcrunch.com/2025/12/16/nuclear-startup-last-energy-raises-100m-for-its-steel-encased-micro-reactor/ https://techcrunch.com/2025/12/16/nuclear-startup-last-energy-raises-100m-for-its-steel-encased-micro-reactor/#2025-12#Venture equity#$100M Series C Mon, 01 Dec 2025 12:00:00 GMT Astera Institute · Capital event · Venture equity · Press-reported. https://x-energy.com/news/x-energy-closes-oversubscribed-700-million-series-d-financing-round-to-continue-expansion-to-meet-global-energy-demand/ https://x-energy.com/news/x-energy-closes-oversubscribed-700-million-series-d-financing-round-to-continue-expansion-to-meet-global-energy-demand/#2025-11#Venture equity#$700M Series D Sat, 01 Nov 2025 12:00:00 GMT Jane Street (lead), ARK Invest, Galvanize, Point72 · Capital event · Venture equity · Company-reported. https://techfundingnews.com/a-high-school-dropouts-nuclear-startup-just-landed-1b-from-sequoia-at-a-6b-valuation/ https://techfundingnews.com/a-high-school-dropouts-nuclear-startup-just-landed-1b-from-sequoia-at-a-6b-valuation/#2025-11#Venture equity#$130M Series A Sat, 01 Nov 2025 12:00:00 GMT Not disclosed · Capital event · Venture equity · Press-reported. https://www.barchart.com/story/news/35743041/terrestrial-energy-inc-completes-business-combination-with-hcm-ii-acquisition-corp https://www.barchart.com/story/news/35743041/terrestrial-energy-inc-completes-business-combination-with-hcm-ii-acquisition-corp#2025-10#IPO / listing#Over $292M gross including a $50M PIPE Wed, 01 Oct 2025 12:00:00 GMT HCM II Acquisition Corp (Nasdaq) · Capital event · IPO / listing · Press-reported. https://oklo.com/newsroom/news-details/2025/Oklo-Breaks-Ground-on-First-Aurora-Powerhouse/default.aspx https://oklo.com/newsroom/news-details/2025/Oklo-Breaks-Ground-on-First-Aurora-Powerhouse/default.aspx#2025-09#Construction start#Groundbreaking on the first Aurora power Mon, 01 Sep 2025 12:00:00 GMT Proof event · Construction start · Company-reported.