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Powerful and safe: EPR, ATMEA1 and KERENA reactors

With a new generation of reactors, AREVA NP opens the door to the future. Competitive power, climate-friendly and generated with the highest safety. These perspectives are opened by the three reactor models EPR, ATMEA1 and KERENA of Generation III+. They cover an electric output range from 1,100 to approximately 1,650 megawatts – the most extensive range in this industry sector.

All reactor models are reliable in the long term. This means: They are designed for a lifetime of 60 years. Also in terms of safety, the EPR plants presently erected in Finland, France, China and Great Britain are setting standards: They fulfil the requirements of tomorrow, already today.

To increase the reliability of supply AREVA NP manufactures the heavy components required for nuclear power plants in its own factories.  And designs and delivers the instrumentation and control systems, as well as the electrical systems.

Three reactors of the latest generation III+

EPR pressurized water reactor

With about 1,650 megawatts electrical, the EPR is a pressurized water reactor in the upper capacity range. He is the product of Franco-German collaboration. Its evolutionary design combines the experience and the know-how from the most state-of-the-art plants operated in France (N 4) and Germany (Konvoi). The plant concept furthermore consolidates the result of several decades of international research and development programs. Due to a number of improvements, the EPR reactor offers the most sophisticated safety features and equipment worldwide combined with optimum operating behavior.

ATMEA1 pressurized water reactor

The ATMEA1 pressurized water reactor in the medium capacity range provides an electrical output of 1,100 megawatts. Developed and designed by AREVA and Mitsubishi Heavy Industries (MHI) in Japan under the roof of the ATMEA joint venture, the reactor benefits from the skills and the know-how of both companies which have built nearly 130 reactors worldwide over the last 50 years.

ATMEA was founded in 2007. AREVA and MHI hold equal stakes in the joint venture.

KERENA boiling water reactor

KERENA is a 1,250 megawatt boiling water reactor of the medium capacity range. It is based on the proved and tested concept of the boiling water reactor units Gundremmingen B and C constructed most recently in Germany. It also integrates numerous innovative features: Passive safety systems are used in addition to the established active safety systems.

The new reactor was developed in cooperation with the German electricity utility E.ON.

Has utmost priority: Greatest possible reactor safety

All AREVA NP reactor models are based on state-of-the-art technology. This means:

  • Maximum reactor safety
  • Sophisticated operating concepts and easy maintenance
  • Electricity generation at competitive costs
  • Reduced environmental impact (compared to today's reactors).

The reactors use innovative systems to prevent accidents. Their design ensures that the nuclear fuel is used even more efficiently. And less long-lived radioactive waste is produced. The design lifetime is 60 years – compared to 40 years in present-day reactors.

Do you know how the safety concept of a reactor works?

Core melt retaining system

Extensive safety measures are taken to protect the people living in the vicinity of nuclear power plants and the staff working there against radioactive radiation:

- Redundant and spatially separated safety systems ensure that the reactor can be shut down reliably at any time, subsequently maintaining it in a safe, sufficiently cooled condition.

- The massive concrete containment shell of the reactor building protects the reactor against all kinds of external impact, such as earthquakes, air crashes and explosion shock waves.

- The fission products generated during nuclear fission are retained by staggered protection barriers preventing radioactive substances from escaping into the environment.


AREVA NP's EPR reactor constitutes a further progress in safety engineering: In the hypothetic case of a core meltdown, this is held back on a special spreading area and cooled. Only the plant itself would be affected by the incident.

Products and Services

The inner containment of an EPR pressurized water reactor


Safety profile of the EPR reactor

EPR reactor

Six barriers prevent the release of radioactive materials

Reactor types

How does a pressurized water reactor, boiling water reactor, heavy water reactor, fast breeder work?


Operation of a pressurized water reactor


ATMEA1 reactor