Petrobras Explores Floating Nuclear SMRs for Offshore Rigs

Brazil · Energy

Petrobras is exploring the feasibility of using small modular nuclear reactors to power its offshore oil platforms, part of a broader decarbonization strategy, though the company has not committed to building any nuclear facility and remains in an early technical study phase.

Petrobras Studies Nuclear Option for Offshore Operations

Brazil’s state-controlled oil giant is examining whether small modular reactors (SMRs) could replace natural gas generators that currently power its floating production, storage and offloading units (FPSOs) at sea.

The initiative aligns with Petrobras’s goal to reach operational net-zero emissions by 2050, as the company looks for viable low-carbon alternatives for its offshore energy needs.

SMRs are advanced nuclear reactors that are smaller and can be factory-built, potentially offering a compact, long-lasting power source for remote locations.

Joint Feasibility Study Underway with Nuclear Experts

In November 2024, Petrobras signed a 36-month technical cooperation agreement with the Institute of Energy and Nuclear Research (IPEN) and the National Nuclear Energy Commission (CNEN) to evaluate floating SMRs.

The study focuses on the concept of mounting an SMR on a maritime vessel to supply electricity to nearby platforms, bypassing the need for on-platform installation.

Both Brazilian and international experts note that no floating SMR is yet in commercial operation globally; the first Chinese prototype is not expected until 2026 or 2027.

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Technical Possibilities: From Microreactors to Power Hubs

In a technical presentation, Petrobras senior engineer Edgar Poiate outlined potential future configurations: an SMR integrated into an existing FPSO, a dedicated floating ‘power hub’ serving up to three FPSOs, or even subsea microreactors powering seabed equipment.

Poiate stressed that the company would only consider technologies with a Technology Readiness Level (TRL) of 8 or above, meaning they must have been demonstrated in a relevant environment and be close to commercial deployment.

Petrobras consultant Fabio Passarelli, speaking at a separate event, suggested that SMRs could first be tested on support vessels before being placed directly on platforms or on the seabed, and called for coordination with the Brazilian Navy to accelerate development.

Unconfirmed Refinery Reactor Reports

Several Brazilian news outlets have reported that Petrobras is studying a 300 MW SMR for a refinery in Rio de Janeiro to cut its carbon footprint, attributing the information to CNN Brasil.

However, these claims have not been corroborated by any official Petrobras statement, and available primary sources only confirm the offshore-focused study.

Without a public announcement from the company, the refinery reactor idea remains in the realm of speculation.

Background: Decarbonizing Brazil’s Offshore Industry

Petrobras’s deepwater oil platforms currently burn significant amounts of natural gas to generate onboard electricity, contributing to the company’s Scope 1 emissions.

Replacing that gas with a zero-emission source like nuclear power could sharply reduce the carbon intensity of oil production, a growing concern for global investors and regulators.

Brazil already has two nuclear power plants on land, Angra 1 and 2, and a third under construction, but this would be the country’s first floating nuclear application.

What It Means for Expats and Investors

For expatriates living in Brazil, the debate signals how the country’s largest company is approaching the energy transition, which could influence local job markets, environmental policies, and the broader economy.

Investors should note that Petrobras has not allocated capital to any SMR project; the current initiative is purely a research effort. No near-term impact on the company’s financials or dividends is expected.

However, if the technology proves viable and is adopted, it could substantially lower operational emissions and align Petrobras with international climate pledges, potentially enhancing its appeal to ESG-focused funds.

Frequently Asked Questions

Is Petrobras building a nuclear reactor?

No. The company is only conducting a feasibility study on floating SMRs. No construction decision has been made, and the technology is not yet commercially available.

What is an SMR?

A small modular reactor is a compact nuclear fission reactor that can be factory-assembled and transported. It typically generates up to 300 megawatts of electricity, far less than traditional large nuclear plants.

Why would an oil company invest in nuclear power?

Petrobras aims to decarbonize its offshore operations by replacing natural gas generators with a zero-emission power source. Nuclear offers continuous, reliable energy with no direct carbon emissions.

Sources: Petrobras; IPEN/CNEN; epbr.