Last Energy

Last Energy is an American commercial developer of micro-modular nuclear power plants, established in 2020 by Bret Kugelmass, as the commercial spinoff of the Energy Impact Center, an American clean energy research institute.

Last Energy builds a micro-scale 20 MWe power plant and provides full-service project development, including plant design, construction, financing, operations and decommissioning. The company’s power plant, the PWR-20, consists of a few dozen rectangular modules that are factory-made and produces 20 MW of electricity through a pressurized water reactor. As a full-service developer, Last Energy oversees all phases of plant development and management. Last Energy’s goal is to reduce the time and costs of nuclear development in order to decarbonize energy production and dramatically increase access to clean, affordable power. The company is based in Washington, D.C. and has European subsidiaries in Romania, Poland and the UK.

History
In 2017, Bret Kugelmass created the Energy Impact Center (EIC) and began conducting interviews with experts in nuclear energy and related fields for a podcast called Titans of Nuclear. The podcast debuted in January 2018. During this period, Kugelmass concluded the primary reason new nuclear development had stalled was due to construction delays and cost overruns posed by traditional nuclear projects. As of May 2024, Kugelmass and other members of the EIC team have conducted 450 interviews and visited over 100 nuclear sites to compile research. In 2019, the Center introduced the Nuclear Energy Grand Challenge, a prize competition that asked university students to develop business proposals for mitigating the cost, duration and risks of power plant construction and maintenance.

In February 2020, the EIC introduced OPEN100, an open-source platform that aims to ease the design and construction process of nuclear power plants by providing freely-available blueprints. Its stated goal is to reduce the cost and duration of nuclear reactor construction and increase the nuclear power supply 100-fold by 2040 to aid in the decarbonization of the global economy. Last Energy was subsequently created as a commercial twin of the Center and received $21 million in Series A funding led by Gigafund in 2020.

In March 2022, Romanian Prime Minister Nicolae Ciucă announced Last Energy would conduct a demonstrator project in Romania with the Autonomous Directorate of Nuclear Energy Technologies (RATEN) in Mioveni. Ciucă also announced the possibility to scale the deployment of Last Energy’s reactor technology to contribute to Romania’s energy independence goal. This was announced in the wake of Russia invading Ukraine, which caused an energy crisis in Europe. In June, Last Energy signed an agreement with Enea Group, the fourth largest energy group in Poland. The agreement outlined the joint pursuit of the development of Last Energy’s 20 MWe microreactors in Poland, aiming to expand the country’s access to clean power and to achieve carbon neutrality in Poland by 2050. The agreement was signed at a public ceremony at Congress 590 in Warsaw with Polish Deputy Prime Minister Jacek Sasin, who also serves as Minister of State Assets. In July 2022, Last Energy announced an agreement with the Legnica Special Economic Zone (LSSE) in Legnica, in the Lower Silesian Voivodeship of southwest Poland. The agreement stated that Last Energy will develop ten microreactors in the LSSE to power industrial entities in the region.

Last Energy is also in talks with further potential commercial partners, regulators and governments in Europe, Latin America and Asia.

In March 2023, Last Energy completed four deals worth $18.9 billion for 34 reactors in Europe. Kugelmass gave a speech at SXSW that month outlining how to reignite nuclear power by focusing on reducing the cost and timeline of construction. In October 2023, Last Energy showcased a prototype of its nuclear reactor module in Poland.

According to Bloomberg, by February 2024, Last Energy had "secured agreements for 51 units throughout Europe, totaling an estimated $32 billion in value". In March 2024, Last Energy displayed a prototype of its nuclear reactor module outside CERAWeek in Houston, Texas. In April 2024, the company held a similar demonstration event in downtown Washington, D.C. and invited executives from the data center industry. In April 2024, Kugelmass confirmed during a BBC interview that data centers made up approximately half of Last Energy's commercial agreements, which were for over 55 reactors at that point. In April 2024, Kugelmass was a featured speaker for SOSV's Earth Day + series.

In June 2024, Last Energy announced a research partnership with the NATO Energy Security Centre of Excellence to identify applications for micro-nuclear technologies on NATO military bases, in addition to exploring opportunities to deploy microreactors. The company plans to have its first 20 megawatt reactor (enough to power 20,000 homes) up and running by 2025 in Poland and 2026 in the UK.

Design and construction
The company’s first product, the PWR-20, is a 20 MWe micro-modular nuclear power plant, made up of modules that collectively fit inside of a standard shipping container. The purpose of modular design is to ensure that all pieces of the power plant can be constructed in a factory, transported via trucks and then delivered as a kit onsite with a "plug-in ready" electrical system. Using the same principles as the oil and gas industry, Last Energy's approach is meant to reduce the costs and timeline delivering a nuclear plant. The PWR-20 is sized to co-locate next to private sector industrial users such as manufacturers, steel mills, as well as data centers. Last Energy's co-location strategy allows customers to receive power directly and avoid grid restraints. The company purposefully relies on off-the-shelf supply chains, and can deliver a plant within 24 months.

Once completed, the PWR-20 fits inside a football field. One plant, financed by investors, rather than the customer, costs about $100 million. Unique among nuclear developers, Last Energy does not seek any government financing to develop its plants.

The PWR-20 employs a 20 MWe (80 MWth) single-loop pressurized water reactor (PWR) that has a 300C continuous output. The design uses standard full-length PWR fuel enriched to 4.95% and closed-cycle air cooling.

Due to its reliance on air cooling systems, the PWR-20 does not need to be sited near a water source and is tailored to serve dispersed energy users. Last Energy can deliver more than one unit to scale output to the customer's needs.