Fluid Fuel Nuclear Reactors
@ffnuclear.bsky.social
Recent news, presentations, and documents about fluid-fuel / liquid-fuel nuclear reactors around the world. Compiled by a layperson-enthusiast.
U of South Carolina's nuclear engineering lab has created a comprehensive database of MSR salt mixtures that "is used by virtually everyone involved with the technology." The lab's ability to perform specialized measuring of salts is "making USC a destination for nuclear materials analysis."
Finding a nuclear niche
A one-of-a-kind database and specialized testing are making USC a destination for an emerging nuclear technology.
www.sc.edu
September 22, 2026 at 1:10 PM
U of South Carolina's nuclear engineering lab has created a comprehensive database of MSR salt mixtures that "is used by virtually everyone involved with the technology." The lab's ability to perform specialized measuring of salts is "making USC a destination for nuclear materials analysis."
A coolant salt sat in a storage tank for 57 years. Now it will serve as the fuel salt for a research reactor. It will accelerate the reactor's development, and will provide all the salt that the reactor will need over its full lifetime.
An impressive and powerful example of responsible reuse!
An impressive and powerful example of responsible reuse!
On Friday, more than 2 metric tons of FLiBe—a mixture of lithium fluoride and beryllium fluoride—was delivered to the Molten Salt Research Reactor (MSRR), a Natura Resources MSR-1, on the Abilene Christian University campus.
Read more on Nuclear Newswire: www.ans.org/news/2026-09...
Read more on Nuclear Newswire: www.ans.org/news/2026-09...
MSRE FLiBe arrives in Texas for reuse after decades in storage
www.ans.org
September 22, 2026 at 12:52 PM
A coolant salt sat in a storage tank for 57 years. Now it will serve as the fuel salt for a research reactor. It will accelerate the reactor's development, and will provide all the salt that the reactor will need over its full lifetime.
An impressive and powerful example of responsible reuse!
An impressive and powerful example of responsible reuse!
Ameresco, an infrastructure development firm, is starting exclusive negotiations to develop an energy facility at the US Army's Aberdeen Proving Ground in Maryland. Ameresco is essentially the general contractor and Terrestrial Energy will provide the 390 MWe molten salt reactor tech.
www.businesswire.com
September 21, 2026 at 1:19 PM
Ameresco, an infrastructure development firm, is starting exclusive negotiations to develop an energy facility at the US Army's Aberdeen Proving Ground in Maryland. Ameresco is essentially the general contractor and Terrestrial Energy will provide the 390 MWe molten salt reactor tech.
KAERI already has experience developing a chloride-based molten salt reactor for maritime applications. This collaboration with Saltfoss enables expansion to fluoride-based MSR development. 1/2
KAERI and Saltfoss Energy Sign Agreement to Advance Cooperation in Molten Salt Reactor Technology <
KAERI News < News & Information - 한국원자력연구원 대표 홈페이지(영문)Korea Atomic Energy Research Institute
The development of Nuclear technology, New Standards New Innovations, Development of core radiation technology, Development of New Technologies for Mixed-Use, A lead in the study of basic science
kaeri.re.kr
September 8, 2026 at 1:06 PM
KAERI already has experience developing a chloride-based molten salt reactor for maritime applications. This collaboration with Saltfoss enables expansion to fluoride-based MSR development. 1/2
Terrestrial Energy announced recent business developments, including a lease for a 77-acre parcel within the Texas A&M University advanced-nuclear campus. Terrestrial intends to build a molten-salt reactor there. 1/2
Terrestrial Energy Reports Second Quarter 2026 Results | Tue, 08/11/2026 - 07:00
~ NRC Approves PIE Methodology Topical Report, Advancing the IMSR Licensing Basis ~ ~ Texas A&M Agreements Signed Covering Development Activities and Ground Leases Providing Site Control for Completio...
ir.terrestrialenergy.com
August 11, 2026 at 1:45 PM
Terrestrial Energy announced recent business developments, including a lease for a 77-acre parcel within the Texas A&M University advanced-nuclear campus. Terrestrial intends to build a molten-salt reactor there. 1/2
First was an LNG carrier ship. Next was a vehicle carrier ship. Now a containership is the third South Korea-Samsung MSR-powered design to receive preliminary approval from a major shipping society. The Korean government is aiming to complete basic design development of marine MSRs by 2029. 1/3
SMR 추진 대형 컨테이너선 기본승인 획득 <
보도자료 < 소통마당 - 한국원자력연구원 대표 홈페이지
국민 안심 원자력 기술 개발, 새로운 기준·새로운 혁신, 삶의 질 향상을 위한 방사선 핵심기술 개발, 국가와 인류의 미래를 개척하는 융복합 신기술 개발, 국가 기초과학 연구 선도
kaeri.re.kr
July 17, 2026 at 11:48 PM
First was an LNG carrier ship. Next was a vehicle carrier ship. Now a containership is the third South Korea-Samsung MSR-powered design to receive preliminary approval from a major shipping society. The Korean government is aiming to complete basic design development of marine MSRs by 2029. 1/3
Flibe Energy founder Kirk Sorensen reports on remarkable recent advances in nuclear fuel recycling. Combined, they support a novel process that hugely reduces waste volume, including fuel-rod cladding. In fact, the cladding's zirconium becomes integral to the electrorefining process. 1/2
Processing spent nuclear fuel in salt – Energy From Thorium
energyfromthorium.com
June 26, 2026 at 1:36 PM
Flibe Energy founder Kirk Sorensen reports on remarkable recent advances in nuclear fuel recycling. Combined, they support a novel process that hugely reduces waste volume, including fuel-rod cladding. In fact, the cladding's zirconium becomes integral to the electrorefining process. 1/2
In 2025, Moltex Energy went bankrupt and paused operations. Now another company - as yet unnamed - is negotiating to acquire Moltex and "is in the last stages of due diligence." So Moltex's Canadian branch is eager to quickly rebuild, hire talent, restart R&D, and resume permitting activities. 1/3
UPDATE ON WATSS – SSR-W DEVELOPMENT 2026 - Moltex Energy
www.moltexenergy.com
June 19, 2026 at 8:02 PM
In 2025, Moltex Energy went bankrupt and paused operations. Now another company - as yet unnamed - is negotiating to acquire Moltex and "is in the last stages of due diligence." So Moltex's Canadian branch is eager to quickly rebuild, hire talent, restart R&D, and resume permitting activities. 1/3
Kirk Sorensen covers the American Nuclear Society's recent policy statement on Uranium-233. It specifically mentions the Molten Salt Reactor Experiment as a successful use of U233 -- one that would justify the retention and preservation of our existing U233 stockpile. 1/2
ANS policy statement on U-233 – Energy From Thorium
energyfromthorium.com
April 26, 2026 at 5:48 PM
Kirk Sorensen covers the American Nuclear Society's recent policy statement on Uranium-233. It specifically mentions the Molten Salt Reactor Experiment as a successful use of U233 -- one that would justify the retention and preservation of our existing U233 stockpile. 1/2
Memorandums of understanding are by nature ambitious, but in this case the "expectation" of 1 billion euros of investment is particularly notable.
A memorandum of understanding has been signed for construction of a non-nuclear demonstrator Thorizon molten-salt reactor in the Dutch province of Zeeland, a nuclear demonstrator at Petten, Noord-Holland, followed by the first commercial unit in Zeeland.
www.world-nuclear-news.org/articles/dut...
www.world-nuclear-news.org/articles/dut...
Dutch agreement paves way for construction of commercial MSR
A memorandum of understanding has been signed for the construction of a non-nuclear demonstrator Thorizon molten-salt reactor in the Dutch province of Zeeland, a nuclear demonstrator at Petten, Noord-...
www.world-nuclear-news.org
April 20, 2026 at 7:29 PM
Memorandums of understanding are by nature ambitious, but in this case the "expectation" of 1 billion euros of investment is particularly notable.
The Alabama legislature has passed a resolution in strong support of recycling spent reactor fuel into new liquid fuels for advanced reactors. The resolution urges the Governor to help establish an R&D center in Alabama "with notable emphasis in liquid fuel reactor technologies." 1/2
Alabama Legislature Resolves to Use Spent Nuclear Fuel – Energy From Thorium
energyfromthorium.com
April 8, 2026 at 2:30 PM
The Alabama legislature has passed a resolution in strong support of recycling spent reactor fuel into new liquid fuels for advanced reactors. The resolution urges the Governor to help establish an R&D center in Alabama "with notable emphasis in liquid fuel reactor technologies." 1/2
Copenhagen Atomics will collaborate with Rare Earths Norway to access a future supply of thorium, thus using a byproduct of REN's rare-earth mining. REN says the theoretical energy in its mine is 30X greater than the energy in all oil and gas pumped from the Norwegian shelf from 1971-2024.
Rare Earths Norway inngår intensjonsavtaler om bærekraftig utnyttelse av thorium fra Fensfeltet | Rare Earths Norway
Rare Earths Norway (REN) har signert intensjonsavtaler med Thor Medical og Copenhagen Atomics om strategisk samarbeid knyttet til kommersiell bruk av thorium i forbindelse med prosessering av sjeldne ...
kommunikasjon.ntb.no
February 20, 2026 at 12:58 AM
Copenhagen Atomics will collaborate with Rare Earths Norway to access a future supply of thorium, thus using a byproduct of REN's rare-earth mining. REN says the theoretical energy in its mine is 30X greater than the energy in all oil and gas pumped from the Norwegian shelf from 1971-2024.
Another YouTuber visits Copenhagen Atomics. The firm's leaders give hands-on explanations of tech developments, including molten-salt pump progress, temp differentials within the onion core, and lithium enrichment. Despite the host's overenthusiastic claims toward the end, it's a worthwhile video.
Modular Thorium Nuclear Reactors - FINALLY Here?
YouTube video by Two Bit da Vinci
www.youtube.com
February 17, 2026 at 2:20 PM
Another YouTuber visits Copenhagen Atomics. The firm's leaders give hands-on explanations of tech developments, including molten-salt pump progress, temp differentials within the onion core, and lithium enrichment. Despite the host's overenthusiastic claims toward the end, it's a worthwhile video.
Flibe Energy has won a DOE grant to refine its concept for recycling used nuclear fuel. Flibe will research electrochemical processes that dissolve fuel rods, separate the uranium for reuse in conventional reactors, and retain fission products and transuranics for use in liquid-fuel reactors. 1/2
Spent Nuclear Fuel recycling award to Flibe Energy – Energy From Thorium
energyfromthorium.com
February 9, 2026 at 1:23 PM
Flibe Energy has won a DOE grant to refine its concept for recycling used nuclear fuel. Flibe will research electrochemical processes that dissolve fuel rods, separate the uranium for reuse in conventional reactors, and retain fission products and transuranics for use in liquid-fuel reactors. 1/2
The best part of this video runs from 6:20 to 15:00. It's a visit to the Copenhagen Atomics production facility, where the company's co-founders display equipment like molten-salt pumps, piping systems, and a reactor core. They describe the operation and years-long testing of those components.
Why Thorium Nuclear Energy Will Change Society Forever | Copenhagen Atomics #004
YouTube video by Europe’s Foundry
www.youtube.com
January 13, 2026 at 6:36 PM
The best part of this video runs from 6:20 to 15:00. It's a visit to the Copenhagen Atomics production facility, where the company's co-founders display equipment like molten-salt pumps, piping systems, and a reactor core. They describe the operation and years-long testing of those components.
Molten salt reactor developer Copenhagen Atomics announced the sale of more than 50 salt storage tanks to a US customer. It's the company's largest commercial order yet, and reflects demand from "advanced nuclear and fusion applications." Source: CA Newsletter, New Years 2025-26.
December 31, 2025 at 7:46 PM
Molten salt reactor developer Copenhagen Atomics announced the sale of more than 50 salt storage tanks to a US customer. It's the company's largest commercial order yet, and reflects demand from "advanced nuclear and fusion applications." Source: CA Newsletter, New Years 2025-26.
This fuel-production demonstration is another step toward an operating reactor at Idaho National Lab in 2028. The fuel-creation process converts 95% of uranium metal into liquid fuel "in only a few hours."
Idaho National Lab Creates First Batch of Fuel for World’s First Fast Spectrum Molten Salt Reactor Experiment
Researchers at Idaho National Laboratory have successfully created the first batch of fuel salt for the Molten Chloride Reactor Experiment.
www.energy.gov
December 11, 2025 at 6:08 PM
This fuel-production demonstration is another step toward an operating reactor at Idaho National Lab in 2028. The fuel-creation process converts 95% of uranium metal into liquid fuel "in only a few hours."
Reposted by Fluid Fuel Nuclear Reactors
Molten salt reactor developer Thorizon announced it has secured broad industrial and regional support in the Netherlands for the construction of Thorizon Pioneer, a nuclear demonstrator for next-generation molten-salt reactors.
www.world-nuclear-news.org/articles/dut...
www.world-nuclear-news.org/articles/dut...
Dutch support for molten salt reactor demonstrator facility
Molten salt reactor developer Thorizon announced it has secured broad industrial and regional support in the Netherlands for the construction of Thorizon Pioneer, a nuclear demonstrator for next-gener...
www.world-nuclear-news.org
November 26, 2025 at 12:00 PM
Molten salt reactor developer Thorizon announced it has secured broad industrial and regional support in the Netherlands for the construction of Thorizon Pioneer, a nuclear demonstrator for next-generation molten-salt reactors.
www.world-nuclear-news.org/articles/dut...
www.world-nuclear-news.org/articles/dut...
This interview allows Simon Irish, CEO of Terrestrial Energy, to make a maximal financial case for his company. Unlike most CEOs of nuclear-reactor startups, Irish has a background in corporate finance and analysis. This thread collects some of the most interesting quotes. 1/9
Simon Irish: Molten Salt & Market Moves, Terrestrial Energy’s Vision for Nuclear’s Future | Podcast Episode on RSS.com
In this episode of the Advanced Nuclear podcast, Simon Irish, CEO of Terrestrial Energy, talks about his company, its Integral Molten Salt Reactor (IMSR) technology, and the financial aspects of the a...
rss.com
August 18, 2025 at 6:37 PM
This interview allows Simon Irish, CEO of Terrestrial Energy, to make a maximal financial case for his company. Unlike most CEOs of nuclear-reactor startups, Irish has a background in corporate finance and analysis. This thread collects some of the most interesting quotes. 1/9
Singapore-based Thorcon has completed the "first step" of its permitting process in Indonesia. The company hopes to begin construction of its 500 MWe reactor within two years. The reactor would be built in a shipyard, installed on a floating barge, and towed into place.
Indonesia's nuclear regulator has approved Thorcon's site evaluation plan and the site evaluation management system plan for a proposed power plant based on its advanced molten salt reactor technology at a site on Kelasa Island in Bankga Belitung Province.
www.world-nuclear-news.org/articles/reg...
www.world-nuclear-news.org/articles/reg...
Regulatory approval for Indonesian site survey
Indonesia's nuclear regulator has approved Thorcon's site evaluation plan and the site evaluation management system plan for a proposed power plant based on its advanced molten salt reactor te...
www.world-nuclear-news.org
August 7, 2025 at 12:04 PM
Singapore-based Thorcon has completed the "first step" of its permitting process in Indonesia. The company hopes to begin construction of its 500 MWe reactor within two years. The reactor would be built in a shipyard, installed on a floating barge, and towed into place.
Univ. of New Brunswick has opened its Advanced Nuclear Reactors Laboratory to accelerate R&D, technical support, and workforce development. Moltex Energy, a UNB research partner for more than 7 years, noted that the facilities are specifically designed to handle molten salts. 1/2
UNB’s CNER opens cutting-edge lab to support Canada’s nuclear energy future
This afternoon, the Centre for Nuclear Research (CNER) at the University of New Brunswick (UNB) formally opened their new Advanced Nuclear Reactors Laboratory (ANRL).
blogs.unb.ca
July 31, 2025 at 5:34 PM
Univ. of New Brunswick has opened its Advanced Nuclear Reactors Laboratory to accelerate R&D, technical support, and workforce development. Moltex Energy, a UNB research partner for more than 7 years, noted that the facilities are specifically designed to handle molten salts. 1/2
Esben Klinkby, a VP of Saltfoss Energy (formerly Seaborg Technologies), presents the firm's current status and long-term plans. Their principal product is a floating power barge with low-enriched-uranium molten-salt reactors. They are designing and testing with more than 18 partners worldwide. 1/3
conferences.iaea.org
May 19, 2025 at 2:45 PM
Esben Klinkby, a VP of Saltfoss Energy (formerly Seaborg Technologies), presents the firm's current status and long-term plans. Their principal product is a floating power barge with low-enriched-uranium molten-salt reactors. They are designing and testing with more than 18 partners worldwide. 1/3
This thread about China's operating thorium molten-salt reactor includes a complete news article translated into English.
GMW article is very interesting also, b/c it explicitly mentions that LF1 is not the goal, but just a 1st step towards an ENTIRE MSR INDUSTRY that they're building from the ground up.
Also USA is the rabbit in 'the tortoise & the hare'; we've only been yelling WAKE UP! for what, 15-20 years now? 😵
Also USA is the rabbit in 'the tortoise & the hare'; we've only been yelling WAKE UP! for what, 15-20 years now? 😵
April 21, 2025 at 9:08 PM
This thread about China's operating thorium molten-salt reactor includes a complete news article translated into English.
Even as Moltex Energy faces reorganization and a potential sale to new owners, its Canadian subsidiary is pushing ahead with a pre-licensing agreement with Canadian regulators. Pre-licensing discussions will resolve safety and security issues early, so the permitting process can be streamlined. 1/2
Moltex Energy Initiates Pre-Licensing Consultation of WATSS Technology with CNSC - Moltex Energy
Moltex WATSS pre-licensing.pdf Moltex Energy Initiates Pre-Licensing Consultation of WATSS Technology with CNSC Saint John, NB, 14 April, 2025 – Moltex Energy Canada Inc. (Moltex) has recently entered...
www.moltexenergy.com
April 14, 2025 at 1:05 PM
Even as Moltex Energy faces reorganization and a potential sale to new owners, its Canadian subsidiary is pushing ahead with a pre-licensing agreement with Canadian regulators. Pre-licensing discussions will resolve safety and security issues early, so the permitting process can be streamlined. 1/2
Terrestrial Energy will consummate its relationship with a SPAC to become the world's first publicly traded molten salt reactor company. The deal will provide $280M in funding, which may be used to build the firm's pilot reactor in Brazos County, Texas.
www.terrestrialenergy.com
March 27, 2025 at 12:35 PM
Terrestrial Energy will consummate its relationship with a SPAC to become the world's first publicly traded molten salt reactor company. The deal will provide $280M in funding, which may be used to build the firm's pilot reactor in Brazos County, Texas.