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HADES lab landscape

Welcome to HADES

Located 225 meters deep in the Boom Clay, HADES is the Belgian underground research laboratory to study deep disposal of radioactive waste in a clay formation. 

HADES, the High Activity Disposal Experimental Site, is operated by EURIDICE, a partnership between NIRAS-ONDRAF, responsible for the safe management of all radioactive waste in Belgium, and SCK CEN, the Belgian Nuclear Research Centre. The EURIDICE team is responsible for safely operating the laboratory and its installations, performing Research, development and demonstration (RD&D) on deep disposal in clay and communicating about its activities. 

Ever-evolving in function of the research needs, HADES is crucial to the Belgian research programme on radioactive waste management. It is a one-of-a-kind underground research facility, tucked away in a thick layer of clay. For years, scientists have been exploring how this natural barrier could help safely dispose of radioactive waste deep underground. 

But let’s be clear: HADES is – and will remain – a research lab. It’s not designed to become a repository for radioactive waste. Why not? Because HADES has not been chosen nor designed to be a disposal site.

In the picture

Liftschacht 2

Dive deep into HADES

HADES was the first underground research lab specifically designed to study deep disposal of radioactive waste. It remains extremely relevant today, as it is still the most important tool towards the implementation of a deep geological repository in Belgium. Have a look here, where we unearth the what, why, how and where of our underground research lab. Start digging for the full picture!

researchers investigating concrete cracks

Expertise

The EURIDICE team has decades-long expertise in developing excavation and  construction techniques, analysing the properties of clay favorable deep disposal, and instrumentation and monitoring of the various in situ tests. Learn more about the different research topics.

HADES40 event

Documentation & Events

Since the start of the excavation in 1980, we have generated a wealth of documentation. This ranges from in-depth scientific work, over leaflets for a general audience over brochures to even podcasts and Youtube clips.  Read up on our latest work in recent reports, dive into the archives or explore our past events, podcasts and videos here.

Latest news

feed through praclay

PRACLAY cooling

In november 2025, the heater in the PRACLAY gallery was switched off. We are now in the cooling phase of the heater test, which will take a few more years.

    MMoorree  nneewwss