Calogena
Calogena, a Paris-based subsidiary of the Gorgé Group, develops the CAL30, a 30 MW thermal small modular reactor designed to decarbonize European district heating networks for municipal governments and heating operators, with first deployments planned from 2030.
- Company typePrivate
- Founded2021
- HeadquartersParis, France
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Calogena does
Calogena, founded in 2021 in Paris and operating as a subsidiary of the diversified industrial group Gorgé, designs and develops the CAL30 — a 30 MW thermal small modular reactor (SMR) specifically engineered to decarbonize European urban district heating networks. The reactor is a light water design based on pool-type research reactor principles, operating at low pressure (~6 bar) and low temperature (~100°C), with an intrinsic safety architecture covering reactivity control, passive core cooling, and hazardous material confinement. Three patents filed in November 2023 protect these safety systems, and the company was the first SMR developer to qualify commercially available rod-type fuel (3.4% low-enriched uranium) identical to that used in the French nuclear fleet. Each module is designed to supply heating for 12,000–20,000 households with refueling required only once every two years and a footprint of roughly 3,000 m².
The company's revenue model is pre-revenue, with projected income streams from module sales or long-term leasing of CAL30 reactors, recurring operation and maintenance services, and project development/feasibility work. Go-to-market is sales-led and directed at municipal governments, local authorities, and district heating network operators, with early anchor projects tied to CEA's Cadarache site, Kuopion Energia in Finland, and a potential €1.5 billion tender for ~15 SMRs from the City of Helsinki. The company pursues a partnership-led commercialization strategy, with strategic alliances covering the fuel cycle (Orano), reactor engineering (Škoda JS), demonstration sites (CEA), Nordic market access (Steady Energy via CityHeat), and district heating network access in Central and Eastern Europe (Veolia). First commercial deployments are planned from 2030.
Calogena firmographics
Firmographics- Name
- Calogena
- Legal name
- Calogena
- Website
- https://calogena.com
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Calogena, a Paris-based subsidiary of the Gorgé Group, develops the CAL30, a 30 MW thermal small modular reactor designed to decarbonize European district heating networks for municipal governments and heating operators, with first deployments planned from 2030.
- Ownership category
- akta.pro rank
Calogena industry classification
Industry- Product category
- Small Modular Reactor Systems
- NAICS
- Nuclear Electric Power Generation (221113), Steam and Air-Conditioning Supply (221330)
- SIC
- Cogeneration Services & Small Power Producers (4991)
- akta.pro primary industry
- Small Modular Reactor (SMR) Platforms & Balance-of-Plant Integration (EUAKADAA)
- akta.pro secondary industries
- Gen III/III+ Reactor Systems & Components (EUAKADAB), Reactor Protection, Safety Systems & Engineered Safeguards (ECCS, Containment Isolation) (EUAKADAI), Small Modular Reactor (SMR) Power Generation (EUACADAF)
Keywords
Where Calogena is headquartered
LocationHeadquarters
- HQ city
- Paris
- HQ country
- France
- HQ region
- Europe
Offices3 records
Markets served
Calogena business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Personnel, Operations, Supply Chain, Marketing or Sales, Others
Revenue model
- Nuclear Heating Module Sales/Leasing: Pre-revenue company developing SMR heating modules for district heating networks. Revenue model will involve sale or long-term leasing of CAL-30 reactors to municipal governments and district heating operators. Each module provides 30 MW thermal to heat approximately 12,000-20,000 households.
- Operation and Maintenance Services: Ongoing O&M services for deployed reactors, including fuel refueling (requiring only one truck every two years).
- Project Development Services: Feasibility studies, site assessments, and regulatory filing support for municipalities and industrial sites considering SMR deployment.
Go-to-market motion3 records
Distribution channels3 records
Marketing channels5 records
Calogena product offering
Product offeringCore offering
Calogena designs and develops the CAL30, a 30 MW thermal Small Modular Reactor (SMR) specifically engineered to decarbonize European district heating networks. The light water reactor operates at low pressure (~6 bar) and low temperature (~100°C) with intrinsic passive safety, uses commercially available rod-type fuel, and delivers heat directly to urban heating networks without electricity conversion, with each module serving 12,000–20,000 households.
Product overview
Calogena offers a single unified product: the CAL30 small modular reactor, a 30 MW thermal nuclear boiler specifically engineered for district heating applications. The product consists of compact, factory-assembled modules designed to replace fossil fuel-based heating in urban networks, providing decarbonized heat directly to municipal and industrial consumers without electricity conversion. The solution targets European district heating operators seeking to eliminate combustion-based heating.
Differentiator
Problem solved
Functional benefit
Brands
- CAL30: 30 MW thermal small modular reactor specifically designed for carbon-free district heating networks
Products and services
- CAL30 Small Modular Reactor A 30 MW thermal Small Modular Reactor (SMR) using a light water design specifically engineered to decarbonize urban district heating networks. The reactor operates at low pressure (~6 bar) and low temperature (~100°C) for intrinsic passive safety, uses standard commercially available rod-type fuel with 3.4% low-enriched uranium, features a compact core of less than one cubic meter, and delivers heat directly to district heating networks without thermodynamic conversion to electricity. Each factory-assembled module supplies approximately 12,000–20,000 households, requires refueling only once every two years, and produces 2 g CO₂ per kWh versus 230 g for gas heating. It is targeted at municipal governments, district heating utilities, and industrial heat consumers in Europe.
Quantifiable outcome
- 2 g CO2 per kWh - lowest carbon intensity of any heating solution vs 230 g for gas
- +3 more outcomes
Companies that use Calogena
Customer profileNamed customers3 records
Segments3 records
Ideal customer profiles3 records
Calogena technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature7 records
Calogena partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered flagship and core.
- VeoliaflagshipOne-year Memorandum of Cooperation signed to explore SMR technology potential for decarbonizing district heating networks, with particular focus on Central and Eastern Europe. Major environmental services company partnership.
- OranocoreStrategic partnership announced at World Nuclear Exhibition for collaboration on nuclear fuel cycle supporting CAL30 deployment. Orano brings expertise in nuclear fuel management and supply chain. This partnership secures fuel supply and waste management for Calogena's reactors.
- Škoda JScoreStrategic partnership announced at World Nuclear Exhibition to strengthen collaboration on CAL30 small modular reactor project. Škoda JS provides reactor engineering expertise.
- CEA (Commissariat à l'énergie atomique)coreLetter of intent signed to study installation of first Calogena module at CEA's Cadarache center with connection to the center's district heating network. Key validation milestone for technical deployment.
- Kuopion EnergiacoreSelected to participate in Environmental Impact Assessment (EIA) process for equivalent of three Calogena modules in Kuopio, Finland. First international deployment opportunity.
- Steady Energy (Finland)coreJoint CityHeat project selected by European Commission SMR Industrial Alliance. Partnership enables transatlantic collaboration between French and Finnish SMR developers for district heating.
Scale indicators8 records
Recent moves7 records
Expansion highlights6 records
Calogena competitors and assessment
Company assessmentEmerging players
- X-energy: Developer of the Xe-100 high-temperature gas-cooled reactor with industrial process heat applications. Competes with Calogena for industrial heat decarbonization customers and DOE/EU funding.
- TerraPower: Bill Gates-backed developer of the Natrium sodium-cooled fast reactor. While targeting electricity generation, TerraPower is exploring industrial heat applications and represents a competing advanced nuclear platform for decarbonization funding and customer mindshare.
Broad incumbents
- Westinghouse Electric Company: US-headquartered nuclear reactor designer developing the AP300 SMR for industrial heat and power applications. Competes with Calogena for European municipal and industrial customers seeking proven nuclear vendors.
- Framatome: Major French nuclear reactor designer and a partner in Nuward. Provides reactor engineering services, fuel assemblies, and instrumentation relevant to SMR development. Both collaborator and competitor in the French SMR ecosystem.
- EDF (Électricité de France): France's national nuclear utility and parent of Framatome/Nuward. Operates Europe's largest nuclear fleet and is the incumbent provider of low-carbon heat and electricity. Sets the competitive baseline Calogena must beat on cost, scale, and political backing.
Direct peers
- Rolls-Royce SMR: UK-based SMR developer building a 470 MWe reactor targeting UK and European utilities and industrial heat customers. Competes with Calogena for European clean-energy infrastructure deals and government support programs.
- Nuward: EDF/Framatome joint venture developing a 340 MW small modular reactor also intended partly for district heating and industrial heat. Direct French competitor pursuing the same European municipal customers with deeper balance sheet and incumbency advantages.
- Steady Energy: Finnish SMR developer designing a ~50 MW thermal reactor (LDR-50) specifically for district heating. Joint partner of Calogena in the EU CityHeat project and a direct competitor for Nordic district heating decarbonization contracts.
- Holtec International: US developer of the SMR-160, a 160 MWe small modular reactor pursuing both electricity and district heating applications in Europe and internationally. Competes in the same SMR procurement processes as Calogena.
Others
- Veolia Environnement: Global environmental services and district heating operator that signed a cooperation MoU with Calogena in 2026. Represents both a customer/channel partner for Calogena and a potential alternative supplier of low-carbon heat solutions.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
Calogena social profiles
Digital presenceCalogena compliance and trust
Trust signalCompliance3 records
Calogena financial estimates
Financial estimateRevenue estimate
Valuation estimate
Calogena leadership team
Management profileNumber of profiles
Profiles12 records
Calogena subsidiaries and ownership
Company hierarchySubsidiaries1 record
Calogena funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Calogena M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Calogena
What does Calogena do?
Calogena designs and develops the CAL30, a 30 MW thermal Small Modular Reactor (SMR) specifically engineered to decarbonize European district heating networks. The light water reactor operates at low pressure (~6 bar) and low temperature (~100°C) with intrinsic passive safety, uses commercially available rod-type fuel, and delivers heat directly to urban heating networks without electricity conversion, with each module serving 12,000–20,000 households.
Is Calogena a public or private company?
Calogena is a private company. It is classified as corporate owned and is currently operating.
When was Calogena founded?
Calogena was founded in 2021. It employs 11 to 50 people.
Where is Calogena based?
Calogena is headquartered in Paris, France, in the Europe region.
How does Calogena make money?
Three revenue lines are on record. Nuclear Heating Module Sales/Leasing is the primary driver. The others are operation and Maintenance Services and project Development Services.
Who are Calogena's main competitors?
Emerging players on record are X-energy and TerraPower. Broad incumbents are Westinghouse Electric Company, Framatome and EDF (Électricité de France). Direct peers are Rolls-Royce SMR, Nuward, Steady Energy and Holtec International. Veolia Environnement is listed as an others.
Does Calogena have an API?
No public API is recorded for Calogena.
What industry is Calogena in?
Calogena's product category is Small Modular Reactor Systems. Its primary akta.pro industry code is EUAKADAA, Small Modular Reactor (SMR) Platforms & Balance-of-Plant Integration, with a secondary code of EUAKADAB, Gen III/III+ Reactor Systems & Components. Its NAICS code is 221113 and its SIC code is 4991.