What Arabelle Solutions does

Arabelle Solutions SAS is a French-headquartered designer, manufacturer, and long-term service provider of turbine island equipment for nuclear power plants. The company supplies steam turbines across the Arabelle family (700-1,900 MW) and the modular STF-N series (down to 100 MW for small modular reactors), generators including the GIGATOP (up to 2,250 MVA) and TOPAIR, TOPACK, TOPGAS, and GTD lines, heat exchangers (moisture separator reheaters and condensers), and pumps for cooling water, feedwater, extraction, and vacuum service. Adjacent offerings include nuclear machine controls, cybersecurity, and balance-of-plant services. Customers are utilities, state-owned nuclear operators, and sovereign entities operating light-water and advanced reactors in France, the UK, Poland, China, India, Sweden, and Switzerland.

The company traces its nuclear heritage to the 1950s through Rateau, English Electric, GEC Alsthom/Alstom, and General Electric. It was housed within GE Vernova's Steam Power Nuclear business until 2 April 2024, when GE Vernova completed its spin-off; EDF (Électricité de France) then acquired full ownership on 31 May 2024, making Arabelle Solutions a wholly-owned EDF subsidiary headquartered in Nanterre, France. Operations span 16 countries with approximately 3,800 employees, manufacturing anchored at Belfort (France) and Sanand (India), plus additional engineering and service sites.

Arabelle Solutions holds an estimated one-third share of the global nuclear installed base, with 150 GW of combined installed power, roughly 100 steam turbine units serviced annually, more than 50 Arabelle units delivered or on order, an active footprint on 30+ new-build projects, and 160+ turbine modernizations executed to date. Its installed fleet has reportedly achieved a 99.96% reliability rate over a ten-year forced-outage window. Revenue is generated primarily through multi-year, multi-hundred-million-euro equipment supply contracts on new-build programs, supplemented by recurring long-term service agreements on installed units, with pricing structured around engineered, custom-built capital equipment rather than standardized catalog products.

Name

Arabelle Solutions

Legal name

Arabelle Solutions SAS

Website

https://arabellesolutions.com

Company type

Private

Founded year

2024

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Arabelle Solutions designs, manufactures, and services steam turbines, generators, heat exchangers, and pumps for nuclear power plants, serving utilities and state operators across 16 countries. EDF-owned and headquartered in France, it covers roughly one-third of the global nuclear installed base.

Ownership category

akta.pro rank

Product category

Nuclear Turbine Island Equipment

NAICS

Turbine and Turbine Generator Set Units Manufacturing (333611), Engine, Turbine, and Power Transmission Equipment Manufacturing (3336), Power Boiler and Heat Exchanger Manufacturing (33241)

SIC

Engines & Turbines (3510), Motors & Generators (3621)

akta.pro primary industry

Steam Supply System & Turbine Island Interfaces (Steam Generators, Heat Exchangers) (EUAKADAF)

akta.pro secondary industries

Steam Turbines & Turbogenerators (IMAHAFAB), Component & System Upgrades / Modernization (I&C Digital, Turbine-Generator, Balance-of-Plant) (EUAKABAE), Balance-of-Plant (BOP) EPC (Turbine Island, Conventional Systems, Buildings) (EUAKAAAF), Gen III/III+ Reactor Systems & Components (EUAKADAB)

Keywords

• Nuclear turbine generators
• Steam turbine equipment
• Power plant services
• Nuclear heat exchangers
• Turbine island solutions

Headquarters

HQ city

Nanterre

HQ country

France

HQ region

Europe

Offices11 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Infrastructure

Revenue model

1. New Build Equipment Sales: Sale of turbine island components and full turnkey turbine island solutions for new nuclear power plant construction, including steam turbines, generators, heat exchangers, pumps, and control systems.
2. Aftermarket Services and Maintenance: Lifecycle services including maintenance, repairs, upgrades, and lifetime extensions for existing nuclear power plants. Services approximately 100 nuclear power plant units annually. Includes 24/7 support, planned and emergency repairs, and modernizations.
3. Spare Parts and Components: Supply of replacement parts and components for turbines, generators, and other turbine island equipment to maintain and extend plant lifetime.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Arabelle Solutions designs, manufactures, and services integrated turbine island technology for nuclear power plants, combining steam turbines, generators, heat exchangers, pumps, and control systems into turnkey or component-level solutions. The company sells directly to nuclear utilities for new-build projects (including the world's most powerful nuclear steam turbines and SMR-scale solutions from 50 to 600 MW) and provides lifecycle aftermarket services to roughly 100 operating nuclear units annually, including maintenance, repairs, upgrades, lifetime extensions, and cybersecurity for control systems.

Product overview

Arabelle Solutions is a global leader in nuclear turbine island technologies, providing world-class integrated solutions for nuclear power plants from the world's most powerful steam turbines to Small Modular Reactors (SMRs). The company offers a comprehensive portfolio comprising steam turbines (Arabelle, STF-N700, and STF-N series for SMRs), generators (GIGATOP, TOPAIR, TOPACK, TOPGAS, GTD), heat exchangers (Moisture Separator Reheaters and Condensers), and power plant pumps (cooling, extraction, feedwater, and vacuum systems). These products are complemented by extensive services including steam turbine services, generator services, nuclear machine controls, cybersecurity, and balance of plant services. The company also provides turnkey turbine island solutions for SMRs from 50 to 600 MW, serving reactors from 50 MW to 1,900 MW across Europe, Asia, and Africa.

Differentiator

Problem solved

Functional benefit

Brands

• Arabelle: The Arabelle is the world's most powerful nuclear steam turbine in operation, suitable for reactors from 700 to 1,900 MW, with more than 50 units delivered or on order.
• TOPAIR
• GIGATOP
• TOPACK
• TOPGAS
• STF-N700

Products and services

• Arabelle Turbine The world's most powerful nuclear steam turbine in operation, suitable for reactors from 700 to 1,900 MW, with a unique architecture producing 2% more power output than traditional configurations, 99.96% reliability rate, and the LSB75 75-inch last-stage blade. Over 50 units delivered or on order globally.
• STF-N700 Steam Turbine Full-speed compact steam turbine for medium and advanced reactors with output range of 500-800 MW, over 700,000 operating hours, and impulse-type blading with six stages for increased efficiency.
• STF-N600 Steam Turbine Full-speed steam turbine for SMRs with output range of 350-600 MW, supporting up to 300 bar/630°C steam parameters with reheat configuration.
• STF-N400 Steam Turbine Full-speed steam turbine for SMRs with output range of 250-550 MW, supporting up to 185 bar/600°C steam parameters.
• STF-N200 Steam Turbine Full-speed steam turbine for SMRs with output range of 100-350 MW, available in reheat and non-reheat configurations.
• STF-N100 Steam Turbine Full-speed steam turbine for SMRs with output range of 50-130 MW, supporting up to 165 bar/565°C steam parameters.
• GIGATOP 4-pole Generator Hydrogen and water-cooled generator suitable for large and very large nuclear reactors with apparent power range of 1,100 to 2,250 MVA, representing the world's most powerful generator with efficiency up to 99%.
• GIGATOP 2-pole Generator Hydrogen-cooled generator with apparent power range of 500 to 1,400 MVA, designed for large nuclear reactors with efficiency up to 99%.
• GTD Generator Water-cooled generator with rotor and stator winding water-cooling technology that avoids the need for hydrogen, suitable for large reactors with power range of 540 to 1,100 MVA.
• TOPAIR Generator Air-cooled generator for SMRs with power range of 120-400 MVA, efficiency up to 98.9%, and compact design for easy delivery, installation, and maintenance.
• TOPACK Generator Air-cooled generator with power range of 50-170 MVA, designed for compact SMR applications with high factory pre-assembly levels.
• TOPGAS Generator Hydrogen-cooled generator for medium reactors with power range of 300-750 MVA and terminal voltage of 18-23 kV.
• Moisture Separator Reheaters (MSR) Heat exchangers that remove moisture and superheat steam to avoid erosion corrosion in low pressure turbines, with over 200 units in operation and 40+ years of experience, increasing availability and efficiency while offering quick-start operation.
• Condensers Surface condensers engineered and delivered for over 50 years with patented tube bundle design and track record of outstanding performance, available in rectangular and cylindrical designs for PWR and BWR power plants.
• Cooling Water Pumps Concrete volute pumps with over 30 years of proven operation, featuring simple configuration with minimal components and enhanced corrosion-resistant features, with flow range up to 45 m3/s.
• Extraction and Recovery Pumps Multi-stage barrel immersed condensate extraction pumps with enhanced efficiencies up to 86% and head range from 20 to 500 m, with recovery pumps adapted to specific conditions for best efficiency and reliability.
• Feedwater Pumps Pumps introduced in 1970 with many dozen in operation worldwide, delivering consistent steady-state performance at nominal load, designed to withstand extreme pressure, high temperature and cavitation.
• Vacuum Pump Systems Vacuum pumps utilizing water blade and liquid ring technologies with extensive experience; water blade technology offers more efficient operation at lower pressure with reduced motive steam consumption.
• Cybersecurity Solutions Comprehensive cybersecurity services for nuclear turbine islands including Assess, Protect, Respond & Recover, and Maintain capabilities, covering Patch Management, Backup and Recovery, Log Collection, Secure Remote Access, System Hardening, Intrusion Detection Systems, Network Segmentation, Data Diodes, SIEM, and SOC.
• Nuclear Machine Controls Services Hardware design and manufacturing with software configuration for instrumentation and control systems of steam turbines, generators, and auxiliaries, including troubleshooting, repairs, upgrades, and proactive obsolescence management.
• Steam Turbine Services Comprehensive repair, maintenance and monitoring services including planned and unplanned outages, upgrades, retrofits, and condition monitoring, covering model-based torsional vibration monitoring and diagnostics for focused outage planning.
• Generator Services Worldwide generator maintenance, service and repair including in-situ robotic inspection, generator rewinds using stainless steel technology, parts supply, field services, repairs, and component replacement.
• Balance of Plant Services Comprehensive services covering heat exchangers, mechanical equipment, electrical and I&C systems, and condenser tube cleaning systems (Technos), including upgrades, retrofits, replacements, retubing, refurbishment and repairs.
• Turbine Hall Solutions for SMRs Standardized and compact turbine island solutions for SMRs producing between 50 and 600 MW, from single equipment to full turnkey turbine islands with high level of factory pre-assembly allowing simpler installation.

Quantifiable outcome

• 99.96% reliability rate (10-year forced outage rate) for Arabelle turbines
• +5 more outcomes

Named customers10 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability6 records

Feature9 records

Partnerships

Six partnerships are on record, tiered core, major, flagship and minor.

• Dongfang Electric CorporationcoreStrategic or Co-development Partner · 5 November 2025Arabelle Solutions and Dongfang Electric Corporation of China signed an agreement for servicing and maintenance of nuclear turbine island equipment, extending their collaboration in the Chinese nuclear market.
• S.N. NuclearelectricamajorStrategic or Co-development Partner · 8 October 2025Contract for the refurbishment of the turbogenerator of Unit 1 at the Cernavoda Nuclear Power Plant in Romania. This represents a significant service partnership for modernizing existing nuclear infrastructure.
• GE Vernova Hitachi Nuclear EnergyflagshipStrategic or Co-development Partner · 21 July 2025Arabelle Solutions is supplying turbine island equipment (SMR nuclear steam turbine, TOPAIR generator, and heat exchangers) for GE Vernova Hitachi Nuclear Energy's BWRX-300 SMR project at Ontario Power Generation's Darlington Nuclear Generating Station in Canada. The partnership positions Arabelle as a key supplier in GE Vernova's SMR ecosystem.
• Warsaw University of TechnologyminorStrategic or Co-development Partner · 1 April 2025Cooperation agreement on skills development for the Polish nuclear power sector, supporting workforce development for new nuclear build projects in Poland.
• Chemetics Inc (Ontario, Canada)minorChannel Partner/ Reseller/ Distributor · 1 January 2025Ontario-based supplier that manufactures components for the heat exchangers in the Darlington SMR project supply chain, providing local content for Arabelle's turbine island deliveries.
• EDF (Électricité de France)coreStrategic or Co-development Partner · 31 May 2024EDF acquired Arabelle Solutions (part of GE Vernova's Steam Power Nuclear activities) on May 31, 2024. EDF is the parent company providing strategic direction and access to EDF's global nuclear operations. Prior to this, the company was part of GE and then GE Vernova.

Scale indicators11 records

Recent moves9 records

Expansion highlights5 records

Direct peers

• Mitsubishi Heavy Industries: Mitsubishi Heavy Industries manufactures steam turbines and generators for nuclear and thermal power plants through its Power Systems segment, directly competing with Arabelle in large nuclear turbine islands globally (e.g., supplied turbines for multiple Japanese and Korean reactors).
• Dongfang Electric Corporation: Dongfang Electric manufactures nuclear steam turbines for Chinese reactor programs (Hualong One, AP1000) and is both a partner (signed 2025 service agreement with Arabelle) and a competitor for Chinese nuclear turbine island market share.
• Doosan Enerbility: Korean OEM of nuclear steam turbines and generators for APR1400 reactors and export programs (UAE Barakah); directly competes with Arabelle on reactor types above 1,000 MW and on Asian and Middle East new-build opportunities.
• Shanghai Electric: Shanghai Electric manufactures nuclear steam turbines and generators for China's domestic AP1000, Hualong One and CAP-series reactors; competes with Arabelle (which serves Dongfang and CGN) for Chinese nuclear turbine island contracts.
• Hitachi-GE Nuclear Energy: Hitachi-GE Nuclear Energy is the joint venture supplying BWR turbine islands and is the reactor partner (with GE Vernova) for the BWRX-300 SMR that Arabelle supplies at Darlington; competes as both reactor designer and turbine island supplier across Japanese and global markets.

Broad incumbents

• Siemens Energy: Siemens Energy supplies industrial steam turbines and generators broadly across power generation; nuclear-specific offerings are more limited than Arabelle but the company competes in adjacent thermal power and large-equipment segments.
• Framatome: Framatome is EDF's nuclear reactor and fuel-cycle affiliate; though focused on the nuclear island (steam generators, reactor vessel, I&C) rather than turbine island, it shares EDF ownership and could expand into adjacent turbine-scope services overlapping with Arabelle.
• MAN Energy Solutions: MAN Energy Solutions manufactures large industrial steam turbines and turbomachinery for power and process industries; overlaps with Arabelle in heavy turbine manufacturing, though its nuclear footprint is narrower than its fossil/marine focus.

Others

• Atotech (Mitsubishi Chemical subsidiary - nuclear power services): Mitsubishi Chemical Group's power plant services and water blade pump technologies overlap with Arabelle's aftermarket and balance-of-plant capabilities; comparable as adjacent ecosystem participant in nuclear plant lifecycle services.

Regional players

• Bharat Heavy Electricals Limited (BHEL): BHEL manufactures steam turbines and generators for India's domestic nuclear program (including 700 MW PHWR fleet) and competes with Arabelle's India manufacturing presence; primarily serves Indian utilities on indigenous reactor builds.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/embed/RKBzdW7NJmM
• LinkedInlinkedin.com/company/arabellesolutions

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Arabelle Solutions