# Source note — TerraPower Korea Natrium gate stack Date checked: 2026-08-14 PDT Published file: `blog/articles/terrapower-korea-natrium-gate-stack-source-card.html` ## Why this was selected This was selected as the daily Energy source-card because TerraPower posted a same-day official release announcing two Korea-linked commercialization agreements for Natrium: a framework agreement with Hyundai Engineering & Construction (HDEC) and a term-sheet agreement with SK Innovation. Multiple Korean mainstream/trade outlets also reported related SK and Doosan developments. ## Primary/official anchors - TerraPower official release, August 14, 2026: `https://www.terrapower.com/TerraPower-Accelerates-Natrium-Reactor-Deployment-Following-Landmark-Meetings-with-Korean-Leaders` - Says TerraPower announced two key agreements during Korea meetings: one with HDEC and one with SK Innovation. - Says HDEC was selected as EPC contractor to build up to eight future Natrium reactors with completion, price and performance guarantees intended to facilitate conventional commercial financing. - Says TerraPower and SK Innovation signed a term sheet to advance intent to develop Korea's first commercial Natrium plant and expand internationally. - Says Natrium uses a 345 MW sodium-cooled fast reactor and molten-salt energy storage that can boost system output to 500 MW. - Says first Natrium plant, Kemmerer Unit 1, is an ARDP project expected to be completed in 2030; TerraPower says NRC issued the construction permit in March and construction began in April. - TerraPower Natrium technology page: `https://www.terrapower.com/natrium/` - Describes the DOE ARDP partnership, 50/50 cost share and up to $2B authorization for the Natrium project. - Describes the 345 MW sodium fast reactor plus molten-salt storage system. - DOE ARDP page: `https://www.energy.gov/ne/advanced-reactor-demonstration-projects` - Official ARDP context; captured for program background. ## Reporting/trade anchors - Yonhap, August 14, 2026: Doosan Enerbility secures SMR equipment deal from TerraPower. It reports Doosan will manufacture key equipment for the Natrium SMR project. - The Korea Herald / Herald Business, August 14, 2026: SK Innovation to partner with TerraPower on global rollout of Natrium SMR. It reports SK's agreement, prior SK/SK Group investment of $250M, and AI/data-center power framing. - The Korea Herald, August 14, 2026: Doosan Enerbility to supply key SMR components to TerraPower. It reports containment-vessel/support/internal-reactor-structure scope and reiterates Kemmerer timing. - Reuters RSS headline found via Google News/Bing News: “U.S. TerraPower, South Korea's SK Innovation sign preliminary deal on global SMR projects.” Direct Reuters fetch returned HTTP 401 in this environment; therefore Reuters is used only as a visible lead, not as the factual text anchor. ## Evidence labels and cautions - **Official company announcement:** high confidence that agreements were announced and how TerraPower describes them. - **Term sheet / framework agreement:** not a final plant order, not project financing, not a regulatory approval, and not delivered electricity. - **EPC guarantee language:** important financeability signal, but future Natrium reactors still need specific sites, customers, licences, fuel chain, EPC contracts, lenders and construction execution. - **Korea first-plant language:** TerraPower frames it as intent to develop Korea's first commercial Natrium plant. That is not the same thing as a Korean regulator approving a plant. - **Market/uranium implications:** conditional only. **Not investment advice:** this is not a securities recommendation. ## Fetch results - source_terrapower_korea_release.html: https://www.terrapower.com/TerraPower-Accelerates-Natrium-Reactor-Deployment-Following-Landmark-Meetings-with-Korean-Leaders -> status=200 final=https://www.terrapower.com/TerraPower-Accelerates-Natrium-Reactor-Deployment-Following-Landmark-Meetings-with-Korean-Leaders type=text/html; charset=UTF-8 bytes=44507 error=None - source_terrapower_natrium.html: https://www.terrapower.com/natrium/ -> status=200 final=https://www.terrapower.com/natrium/ type=text/html; charset=UTF-8 bytes=51091 error=None - source_doe_ardp.html: https://www.energy.gov/ne/advanced-reactor-demonstration-projects -> status=200 final=https://www.energy.gov/ne/advanced-reactor-demonstration-projects type=text/html; charset=utf-8 bytes=126198 error=None - source_yonhap_doosan.html: https://en.yna.co.kr/view/AEN20260814002300320 -> status=200 final=https://en.yna.co.kr/view/AEN20260814002300320 type=text/html;charset=UTF-8 bytes=71515 error=None - source_korea_herald_sk.html: https://biz.heraldcorp.com/article/10841762 -> status=200 final=https://biz.heraldcorp.com/article/10841762 type=text/html;charset=UTF-8 bytes=80614 error=None - source_korea_herald_doosan.html: https://www.koreaherald.com/article/10841652 -> status=200 final=https://www.koreaherald.com/article/10841652 type=text/html;charset=UTF-8 bytes=94284 error=None - source_reuters_direct_attempt.html: https://www.reuters.com/business/energy/us-terrapower-south-koreas-sk-innovation-sign-preliminary-deal-global-smr-projects-2026-08-14/ -> status=None final=https://www.reuters.com/business/energy/us-terrapower-south-koreas-sk-innovation-sign-preliminary-deal-global-smr-projects-2026-08-14/ type=None bytes=0 error=