(GRS-845) SEDS-Proceedings of the 9th GRS Workshop "Safety of Extended Dry Storage of Spent Nuclear Fuel"

All countries with nuclear power plants do not currently have a repository for high-level radioactive waste in operation. This means that in most countries there is a need to store radioactive waste, such as spent fuel, for longer than planned.

The Safety of Extended Dry Storage of Spent Nuclear Fuel (SEDS) workshop was launched in 2017 as a small, focused conference on progress in the safety aspects of extended dry storage of spent nuclear fuel. The aim is to identify knowledge gaps for extended storage and to exchange ideas with research and expert organisations mainly from Germany, the EU and Switzerland. In 2019, the SEDS workshop gained interna-tional recognition as an affiliate of the EPRI-ESCP meeting. Since then, the workshop has become an important event in the international field of extended storage. During the COVID-19 pandemic, the workshop was also held in digital form in 2020 and 2021 with about 100 participants. From a scientific point of view, numerous research topics emerged from the exchange at the SEDS workshop, which also led to new collaborations. It was possible to identify existing knowledge gaps for safe extended 
storage and to define corresponding research areas.

The Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH hosts its 9th SEDS workshop in Garching near Munich on 20th – 22nd May 2025. The event attracted great attention as the program was filled with 20 presentations from 16 institutes and attended by 61 experts from 8 countries. A wide variety of experts was represented at the event, including those from universities and research organisations, technical support organisations, fuel suppliers and authorities.