Developed between 1979 and 2004 by the Navy and IPEN, the Brazilian ultracentrifuge placed the country among the nations that master the full uranium cycle through innovation and energy efficiency.
The development of Brazilian ultracentrifuge technology for uranium enrichment is one of the country's greatest scientific and industrial achievements. The product of more than two decades of research led by the Brazilian Navy, the Nuclear and Energy Research Institute (IPEN) and partner universities, the project consolidated national mastery over the full nuclear fuel cycle — from ore to electricity generation.
The achievement placed Brazil in a select group of nations with their own enrichment technology, using a method of high energy efficiency and reduced environmental impact.
In 1979, during the military regime, Brazil launched what became known as the Parallel Nuclear Programme, aimed at technological autonomy in the field of atomic energy. Until then, the country had depended on international agreements for the supply of enriched uranium, essential to the operation of research reactors and electricity generation. Faced with restrictions imposed by nuclear powers, the solution was to develop isotope separation technology domestically.
The Navy took the lead on the project, in partnership with IPEN and the Navy Technology Centre in Sao Paulo (CTMSP). The goal was to build a safe, economical and entirely national system to enrich uranium in a controlled and peaceful way.
The ultracentrifuge is a device that separates uranium isotopes (U-235 and U-238) by means of centrifugal force. Uranium hexafluoride gas (UF₆) is fed into rotors that spin at speeds above 60,000 revolutions per minute, allowing the lighter isotope to concentrate at the centre and the heavier one at the edges.
Brazil's major advance was the development of special metal-alloy rotors and magnetic levitation systems, which reduce friction and energy consumption. Unlike foreign models, the Brazilian centrifuge is vertical, compact and modular, allowing high output and easy maintenance.
The earliest research began at IPEN, with the team led by physicist Ronaldo Schaeffer and engineer Othon Luiz Pinheiro da Silva. Through the 1980s and 1990s, the project evolved from experimental prototypes to industrial models installed at the Resende Uranium Enrichment Plant (RJ).
Each centrifuge contains electronic sensors, high-frequency motors and automatic control systems developed by domestic industry. The process is digitally controlled by redundant microprocessors, ensuring precision and safety. The system consumes up to ten times less energy than the gaseous diffusion method used by countries such as the United States and France.
The core of the centrifuges uses high-strength composite materials, such as aluminium and titanium alloys, carbon fibre and technical ceramics. The magnetic bearings and the vacuum system are products of precision national engineering. The entire structure is designed to operate in a hermetically sealed environment, eliminating emissions and leaks.
These materials were chosen not only for mechanical performance but also on environmental criteria — light weight, durability and recyclability. Production and maintenance follow strict standards for waste control and energy efficiency.
Mastery of ultracentrifuge technology allowed Brazil to reduce its dependence on nuclear fuel imports drastically. Today, national production supplies research reactors and part of the Angra power stations. The method consumes only 5% of the energy required by older techniques, making it one of the cleanest forms of isotope enrichment in the world.
From an environmental standpoint, the process generates neither radioactive emissions nor liquid waste. All material is reused within the closed cycle, and residual uranium is safely stored for future reuse. It is an exemplary application of clean technology in nuclear energy.
The Brazilian programme has always operated under the principles of the peaceful use of nuclear energy. In 1998, Brazil signed the Quadripartite Agreement with the International Atomic Energy Agency (IAEA) and ABACC (the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials), providing for international inspection of all facilities.
The control electronics developed in the country prevent any improper use, maintaining full transparency and operational safety. This ethical and technical stance consolidated Brazil's image as a reference in non-military nuclear technology.
The Brazilian ultracentrifuge project trained a generation of engineers and scientists specialising in materials, precision electronics, automation and control. Universities such as USP, UFRJ, ITA and UFMG created research lines dedicated to clean nuclear technology. The legacy went beyond the energy field, influencing areas such as nanotechnology, instrumentation and industrial robotics.
The Brazilian ultracentrifuge is a symbol of the country's scientific and industrial capability. Its development combined innovation, energy efficiency and environmental responsibility, making Brazil one of the few nations self-sufficient in the nuclear cycle. Ecobraz's Virtual Electronics Museum preserves this achievement as a prime example of national engineering applied to sustainability and technological sovereignty.