Helen Nuclear Ltd
Helen Nuclear Ltd is a nuclear energy project development company owned by Helen Ltd, whose task is to examine the prerequisites for constructing nuclear energy production in Helsinki. At present, the company is conducting studies on selected plant site alternatives, tendering plant suppliers, and exploring possible alternative business models.
Helen aims to achieve its ambitious emission targets and combustion‑free production through nuclear energy
A small nuclear power plant produces energy consistently, reliably, and predictably, regardless of weather conditions, which helps stabilize fluctuations in electricity market prices. With its carbon dioxide-free production, small nuclear power could, in the future, be part of Helen’s broader portfolio of low-emission energy production.
Helen’s goal is to build small nuclear power production and move away from combustion-based energy production by 2040. Over its entire lifecycle, a nuclear power plant’s carbon dioxide emissions are even lower than those of solar and wind power, so as part of the energy system, it would also support Helsinki’s ambitious emission targets. Compared to other clean production methods, its minimal land requirements make it suitable for Helsinki, where land is scarce. Thanks to its small land footprint and efficient production, it also supports ecosystems important for biodiversity.
With nuclear energy, we can secure the energy needs of a growing city while simultaneously reducing emissions and cost pressures on energy prices.
The path of small nuclear power from studies to implementation
Commissioning a nuclear power plant is a multi-year process that includes several decision-making phases and studies before the investment decision and the start of construction. Our goal is to achieve combustion-free energy production by 2040 through the nuclear energy program.
Progress of Helen’s nuclear energy project
Programme establishment (2024)
In the nuclear energy programme established by Helen in 2024, we define the objectives, boundary conditions and an overall plan for the project. This phase provides the foundation for further project development.
Preparation phase (2025–2027)
During preparation, we assess business models, plant vendors and site alternatives (Vuosaari, Salmisaari, Norrberget). At the same time, the environmental impact assessment progresses alongside continuous dialogue with city residents. The zoning process is also initiated.
Planning
A land‑use planning decision could be completed in the early 2030s. During the preparation phase, a more detailed plant plan, project organisation and investment preparations are developed. Based on these, the project may proceed toward an investment and construction decision.
Pre‑construction works
Before actual construction begins, preparatory works are carried out at the plant site, such as soil and infrastructure surveys and the initiation of manufacturing for technical components.
Construction
A modular construction approach enables phased implementation. The aim is for the plant to be largely built from factory‑manufactured components, which shortens the construction timeline.
Commissioning
Before energy production can begin, testing is carried out, production capability is verified and the operating organisation is finalised. The goal is for the power plant to begin operation during the 2030s.
