Este pin sigue las noticias: muestra lo que se sabe ahora, y aquí está qué cambió y qué lo provocó.

1. Editado12/10/2026 a las 22:49por @ThePinGang

   Resumen

   reescrito

   Antes

   Published cost and electrical output

   Project cost / investmentAbout USD 4 billionCost scopePublished demonstration-project total cost; historical 2024 estimate, separate from federal fundingCost source date2024Electrical generating capacity345 MW — 345 MWe net continuous reactor output; storage-assisted peak excludedVerified project stageUnder construction

   Project-specific research

   IAEA’s 2024 Climate Change and Nuclear Power report identifies US$4 billion expected total cost for the Natrium demonstration project, separately from the US$2 billion DOE contribution. It describes one 345 MWe net reactor at Kemmerer. This is a dated published project estimate; it is not represented as a refreshed 2026 fixed-price budget.

   IAEA’s 2024 Climate Change and Nuclear Power report identifies US$4 billion expected total cost for the Natrium demonstration project, separately from the US$2 billion DOE contribution. It describes one 345 MWe net reactor at Kemmerer. This is a dated published project estimate; it is not represented as a refreshed 2026 fixed-price budget. Natrium — Kemmerer Unit 1: 345 MW generating project rating. 345 MWe net continuous reactor output; storage-assisted peak excluded

   TerraPower April 23, 2026 confirms official plant construction following the construction permit. Non-nuclear site support construction started June 2024. Reactor output is 345 MWe; storage-assisted 500 MW peak output is not additional continuous generating capacity.

   Scope and evidence

   Retained only with documented physical construction, commissioning or 2025–2026 opening and published project-specific costs and electrical output. Costs use the published scope and currency; no benchmark estimates or currency conversions. MW is power capacity, not annual electricity production. Expected annual energy, where given, is a forecast. The map point is a reported plant/project location and may be approximate. Matching inventory views and excluded expansion proposals are not additive capacity.

2. Editado12/10/2026 a las 3:45por @ThePinGang

   Titular

   TerraPower Starts Nuclear Construction of Its Natrium Plant in Kemmerer→Natrium — Kemmerer Unit 1 — under construction

   Entradilla

   reescrito

   Antes

   TerraPower began full construction of Kemmerer Unit 1, a 345 MW sodium-cooled fast reactor with molten-salt storage in Wyoming, on 23 April 2026, seven weeks after the NRC voted to grant its construction permit; the roughly $4 billion plant is due to be complete in 2030.

   Termina

   31 dic 2030→23 abr 2026

   Resumen

   reescrito

   Antes

   Operator and regulator research, October 11, 2026

   TerraPower announced the start of construction on Kemmerer Unit 1 on April 23, 2026 after receiving the NRC construction permit. Natrium’s reactor rating is 345 MW; the storage-assisted peak output is a different metric and must not be represented as the continuous reactor capacity.

   Operator project page identifies Kemmerer as under construction. EPC contracting changes and schedule implications need a later sourced revisit.

   Earlier pin evidence / inventory snapshot

   • TerraPower announced on 23 April 2026 the official start of construction of Kemmerer Unit 1, expected to be the first utility-scale advanced nuclear power plant in the United States, following the NRC construction permit
   • NRC commissioners voted on 4 March 2026 to grant the permit, the first for a commercial-scale advanced reactor; TerraPower says the review took 18 months, from an application it submitted in March 2024
   • The 345 MW sodium-cooled fast reactor is paired with a molten-salt storage system that can lift output to 500 MW for more than five hours, and the plant is developed through the Department of Energy's Advanced Reactor Demonstration Program
   • The milestone moves the estimated $4 billion project from early-site and non-nuclear work, which began with a June 2024 groundbreaking, into full plant construction, with about 1,600 workers being mobilised and about 250 full-time staff once operating
   • TerraPower expects the project to be completed in 2030; the site is near a retiring coal facility in Kemmerer, Wyoming

   Additional August 2026 inventory evidence

   GEM August 2026 snapshot: under construction. 345 MW sum of published phase ratings (ratings may mix solar DC/AC). Technologies: Nuclear.

   Compare phase coverage and AC/DC, nameplate and net ratings before combining source figures. This inventory view is not extra capacity to add to the existing project total.

   Additional August 2026 inventory evidence

   EIA August 2026 snapshot: approvals pending. 500 MW nameplate across 1 new/recent generating units. Technologies: Nuclear.

   Compare phase coverage and AC/DC, nameplate and net ratings before combining source figures. This inventory view is not extra capacity to add to the existing project total.

   Inventory unit details — gem-L100000500364

   Additional source view; compare phase coverage and rating conventions before combining figures.

   • 1 (G100000501003): reported rating 345 MW; liquid-metal-cooled fast reactor; status construction; reported year 2031; solar rating not specified/not applicable.

   Inventory unit details — eia-68635

   Additional source view; compare phase coverage and rating conventions before combining figures.

   • KU1 (KU1): reported rating 500 MW; Nuclear; status (L) Regulatory approvals pending. Not under construction; reported year 2030; solar rating not specified/not applicable.

   • Published project evidencewww-pub.iaea.org95% DE CONFIANZA

3. Editado12/10/2026 a las 0:04por @ThePinGang

   Resumen

   reescrito

   Antes

   Operator and regulator research, October 11, 2026

   TerraPower announced the start of construction on Kemmerer Unit 1 on April 23, 2026 after receiving the NRC construction permit. Natrium’s reactor rating is 345 MW; the storage-assisted peak output is a different metric and must not be represented as the continuous reactor capacity.

   Operator project page identifies Kemmerer as under construction. EPC contracting changes and schedule implications need a later sourced revisit.

   Earlier pin evidence / inventory snapshot

   • TerraPower announced on 23 April 2026 the official start of construction of Kemmerer Unit 1, expected to be the first utility-scale advanced nuclear power plant in the United States, following the NRC construction permit
   • NRC commissioners voted on 4 March 2026 to grant the permit, the first for a commercial-scale advanced reactor; TerraPower says the review took 18 months, from an application it submitted in March 2024
   • The 345 MW sodium-cooled fast reactor is paired with a molten-salt storage system that can lift output to 500 MW for more than five hours, and the plant is developed through the Department of Energy's Advanced Reactor Demonstration Program
   • The milestone moves the estimated $4 billion project from early-site and non-nuclear work, which began with a June 2024 groundbreaking, into full plant construction, with about 1,600 workers being mobilised and about 250 full-time staff once operating
   • TerraPower expects the project to be completed in 2030; the site is near a retiring coal facility in Kemmerer, Wyoming

   Additional August 2026 inventory evidence

   GEM August 2026 snapshot: under construction. 345 MW sum of published phase ratings (ratings may mix solar DC/AC). Technologies: Nuclear.

   Compare phase coverage and AC/DC, nameplate and net ratings before combining source figures. This inventory view is not extra capacity to add to the existing project total.

   Additional August 2026 inventory evidence

   EIA August 2026 snapshot: approvals pending. 500 MW nameplate across 1 new/recent generating units. Technologies: Nuclear.

   Compare phase coverage and AC/DC, nameplate and net ratings before combining source figures. This inventory view is not extra capacity to add to the existing project total.

   Inventory unit details — gem-L100000500364

   Additional source view; compare phase coverage and rating conventions before combining figures.

   • 1 (G100000501003): reported rating 345 MW; liquid-metal-cooled fast reactor; status construction; reported year 2031; solar rating not specified/not applicable.