Two subsidiaries have developed from GRS: The Institute for Safety Technology (ISTec) and RISKAUDIT IRSN/GRS.

The Institute for Safety Technology (ISTec)
The Institute for safety Technology ISTec is one of the leading providers in diagnostics and safety technology. ISTec consults/advises plant construction companies, plant station operators, manufacturing industry, transport authorities and the relevant authorities surrounding the subjects: diagnostics and safety.

RISKAUDIT
RISKAUDIT is an international non-profit European Interest association (EWIV) based in Paris. The association was founded in Paris by GRS and it’s French partner: The Institut de Radioprotection et de Sûreté Nucléaire (IRSN). This development has taken place in order to combine the competencies of GRS and IRSN bringing their technical and scientific knowledge on to a level playing field and also, to work together on projects of a European scale. The focus of RISKAUDIT’s project is on nuclear safety in Central and Eastern Europe.

International Co-operation
Due to the fact that nuclear safety is a global challenge, GRS is engaged in a worldwide collaboration in this field. The aim of this international co-operation is to regulate and develop a collective understanding of safety standards.  Therefore, developing and sharing scientific methods and knowledge and insights into nuclear safety and waste disposal.
International multilateral agreements exists above all with the Organisation for Economic Co-operation and Development, the International Atomic Agency (IAEO) and the European Union (EU).

In addition, there are a wide range of European Co-operations, for example: The Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Bel V and the European TSO Network (ETSON). The aim is, in particular, to strengthen the technical competence and the technical support of supervisory authorities of Eastern Europe, to develop consistent European approaches to technical safety issues, and to give technical advice concerning the safety of nuclear facilities in Eastern Europe.

GRS is also a partner of many other national and international organisations and authorities. Agreements exist, for instance, with the US Nuclear Regulatory Commission (USNRC), the Electric Power Research Institute (EPRI) in the USA, the Japan Nuclear Energy Safety Organisation (JNES), the Russian RRC Kurchatov Institute, the Swiss Nationale Genossenschaft für die Lagerung radioaktiver Abfälle (NAGRA), the Spanish Empresa Nacional de Residuos Radioactivos SA (ENRESA), the French Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA), the Swedish Svensk Kärnbränslehantering AB (SKB), and Russian and Ukrainian regulatory authorities.