Kenya’s Siaya nuclear project could reach 5,000 MW against a backdrop of 3,300 MW

This comparison does not imply that Kenya would have a surplus of production when the plant becomes operational. Demand is increasing, and Nairobi aims to accelerate industrialization. However, it highlights that the project necessitates a scaling up of the grid, financing, and regulatory framework.

William Ruto initially presented a first plant of 2,000 MW in March, with construction set to begin in 2027 and commissioning in 2034. The announcement on September 14 raised the site’s capacity ceiling to between 2,000 and 5,000 MW.

The Ministry of Energy reports a peak demand of approximately 2,514 MW. Nuclear power would enter a system already largely powered by geothermal, hydroelectric, wind, and solar energy, but still facing transport and stability constraints.

The grid will need to scale up before the arrival of nuclear power.

The national energy policy indicates that the transmission network had 9,484 kilometers of high-voltage lines by the end of 2024. The document also notes voltage and frequency constraints, insufficient transport capacity, and production limitations in certain areas.

The government plans to add approximately 2,500 kilometers of new lines by 2027 and around 9,000 kilometers more by 2041. The same document recommends exploring technologies suitable for the current size of the grid, including small modular reactors.

A final capacity of 5,000 MW would not pose the same constraints if built in phases. Nairobi still needs to clarify whether this figure corresponds to multiple reactors over several years or a more concentrated configuration.

Nuclear power is presented as a stable source capable of complementing variable renewables. However, it will not automatically lower electricity bills. Network losses, power purchase agreements, and infrastructure costs continue to weigh on industrial tariffs.

Kenya also has an estimated geothermal potential of about 10,000 MW, with less than 1,000 MW installed by the end of 2024. The choice of nuclear power is therefore part of a diversification strategy rather than a lack of other local energy resources.

Funding, regulation, and appeals remain open.

The Siaya project has so far been associated with a cost of around 500 billion Kenyan shillings for a configuration closer to 2,000 MW. The potential increase to 5,000 MW necessitates clarification on whether this estimate covers an initial phase or a broader portion of the program.

The Kenyan Public-Private Partnerships Authority has indicated that funding could combine public and private capital, development institutions, and export credit agencies. For a nuclear project, the cost of capital is crucial because expenses are incurred long before the first kilowatt-hours are sold.

Kenya also seeks a Phase II mission of the Integrated Nuclear Infrastructure Review from the International Atomic Energy Agency in the last quarter of 2026. The country must strengthen its regulatory framework and train more specialized engineers and scientists before the announced start of construction.

In Siaya, a petition filed with the Environment and Land Court in Kisumu seeks to block irreversible works, land acquisitions, demolitions, and certain financial commitments until constitutional and regulatory requirements are resolved. This procedure does not constitute a cancellation of the project.

Nairobi currently maintains a construction start date of March 2027 and initial commissioning around 2034. The IAEA review, the Kisumu litigation, and the financial arrangements must progress before this deadline.