January 2019 - GRS

Uwe Stoll

Dear Readers,

The beginning of a new year is a suitable occasion to reflect on upcoming challenges. Therefore, I would like to address you not in my capacity as technical-scientific director of GRS – which provides for the content of this edition of the EUROSAFE Newsletter – but as the newly elected president of the European Technical Safety Organisations Network (ETSON). To begin with, I would like to start by thanking my predecessor Benoit de Boeck for his commitment and the efforts he took to further ETSON. I would also like to thank Michel Van haesendonck of Bel V and Alexander Khamaza of SEC NRC for making themselves available as the new vice presidents as well as Jean-Christophe Niel of IRSN and Leon Cizelj of JSI for taking on their tasks as new secretary and treasurer of ETSON.

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Wishing you a successful 2019 and for now happy reading,

Uwe Stoll
Scientific and Technical Director, GRS

 

GRS project manager Matthias Dewald

Recounted: a new research method for waste arising from decommissioning of nuclear power plants

Dismantling a nuclear power plant generates several hundred thousand tonnes of debris. Only a few percent of this waste have to be disposed of as radioactive waste. Researchers from Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) and the University of Cologne are currently working on establishing a new measurement method for the analysis of waste arising from the decommissioning of nuclear power plants, which allows for a more precise and reliable determination of the type and quantity of radioactive substances in the waste.

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Between power operation and decommissioning

KMACS – a new tool to calculate core states of PWR

GRS recently released its newly developed simulation program KMACS (Kernsimulator - Modular Adaptable Core Simulator). KMACS allows for the calculation of core states of pressurised water reactors within one operating cycle, from loading to shutdown. Taking the scheme of the reactor core loaded with fresh and partially spent fuel elements as a basis, the code calculates, for example, detailed temperature and power distributions.

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Between power operation and decommissioning

Between power operation and decommissioning: Why GRS deals with safety aspects of the post-operational phase of nuclear power plants

When a nuclear power plant is finally shut down and no electricity is fed into the supply grid any longer, the so-called post-operational phase begins. This can take several years and ends when the licence holder receives from the competent supervisory authority a licence for the decommissioning and dismantling of the nuclear power plant. During the post-operational phase, the licence holder, in coordination with the competent supervisory authority, can already make preparations for the dismantling of the plant. Currently, there are three plants in post-operation in Germany.

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Casks

Safe storage for extended periods

For high-level radioactive waste, such as spent fuel and vitrified waste from reprocessing, a repository is being sought in Germany as part of the site selection procedure. Until such a repository will be available, the waste is stored in dedicated facilities in so-called dual purpose casks (casks for transport and storage).

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Save the Date - EUROSAFE2019
Dr. Martin Sonnenkalb

Fukushima: Interview with GRS expert Dr. Martin Sonnenkalb

Safety research for nuclear installations is one of GRS's main areas of work. For several years, scientists have been looking in particular at the Fukushima nuclear accident. One of the experts in this field is Dr. Martin Sonnenkalb, Head of the Containment Department.

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Casks

Hidden danger:
GRS and European Commission help Mongolia find radioactive sources

Orphaned radioactive sources are regularly found worldwide. These are, for example, test and measurement sources from industry and mining that have been improperly disposed of or lost, or calibration or irradiation equipment from research and medicine.

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The EUROSAFE NEWS are published on behalf of EUROSAFE and its partners by GRS (Imprint).

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