Already in operation on several nuclear units since 2017, METROSCOPE is in the process to be implemented on the whole fleet of French nuclear plants.

By design, the Pressured Water Reactor use-case also applies to Coal Plants and other nuclear generation types like Boiling Water Reactors or Advanced
Gas-cooled Reactor.
Thanks to METROSCOPE, we produce more Megawatts. That's our Job!

Stéphane FEUTRY

Head of EDF Nuclear Production Performance

Diagnosis of a PWR

The illustration hereunder shows the secondary circuit of a PWR that can be automatically diagnosed by METROSCOPE.




All the hazards that can affect it may have a direct impact on the different measurements made on the secondary circuit. Most of them are difficult to dissociate from the natural variations of the measurements and require advanced and time-consuming expertise.


METROSCOPE is based on a physical model of your Plant, and thus integrates design considerations and physical equations: in a word it has its own expertise. The technology behind METROSCOPE is particularly efficient at integrating expertise in its algorithms.


Thanks to algorithm reinforcement, the scope of METROSCOPE diagnosis is meant to grow throughout its use on your installation. METROSCOPE software will easily evolve with your plant and integrate new measurements and/or new hazards.
It takes less than 6 months to get a fully operational METROSCOPE on a 1000 MWe Nuclear Plant.

Value added

Drop in Maintenance costs

Thanks to METROSCOPE, maintenance team gets better insights into the behavior of the main equipment composing the process. The early detection of hazards will enhance their decision, that will result in reducing the costs of maintenance operations, increase the lifespan of components or even prevent the outright shutdown of the installation.

As a concrete example, METROSCOPE has shown its ability to detect early tube ruptures within the thousands of tubes inside an industrial reheater. With METROSCOPE, well taken care reheaters will last longer, and operator might in the end avoid the replacement of components worth several million euros.

Better Megawatt output

Hazards on the condenser are the first responsible for production loss, followed by cooling towers.

On a 1000 MWe Unit, it is known that an increase of 1mbar of vacuum pressure in the condenser results in a 1MWe loss of production. The condenser itself is the first responsible for unmatched performance objective on a Plant.

On another example, steam safety valves are prone to leakages, that will by-pass the turbine and result in enthalpy loss for the production. The use-case hereafter (from real onsite application of the METROSCOPE) shows for instance a cumulated production loss worth 300,000 euros.

The stakes are high: each MWe saved is worth 8 GWh at the end of the year!


Drawing quantities of Excel curves never was the most efficient way to benefit from the expertise of operators. With METROSCOPE, experts are automatically alerted on the components that do require their attention. Although METROSCOPE provides automatic results, every steps of its reasoning are displayed and accessible to the user. See METROSCOPE as a sandbox, not as a black box.


Thanks to METROSCOPE you will be able to analyze the whole history of the plant and go back in the past to track down former hazards (as long as you have the data stored). It makes METROSCOPE a powerful capitalization tool, that will help you challenge your maintenance programs and suppliers.

Real life Use-Case

The graph below displays a real diagnosis case performed by METROSCOPE on historical data.



The blue curve represents a fault responsible for an overall production loss estimated at over 300,000 euros.
METROSCOPE had seen it from the very start.

Do you want to know more? Feel free to contact us.


Based on EDF experience, the return on investment is less than one year.

“It (METROSCOPE*) saves several million euros. First, we produce more Megawatts, that’s our job. Secondly the extra Megawatts can be found faster, it used to take days of calculations. Thirdly METROSCOPE provides decisional help…”

Stéphane FEUTRY

Head of Nuclear Production Performance in France


Start with one plant, then extend it to your fleet.





We can handle everything on our own or help you building and operating physical Digital Twins. 

In any case, you are the only owner of your data, and you get to keep the digital twin. 

If you can already operate physical digital twins, you might be interested to become our partner. 

We can work either in SaaS mode or “on your premises” in your own proprietary environment.