This deliverable – which has been produced under Work Package 3 “ Time-dynamic techno-economic analysis of the hybrid systems” – aims to identify the optimal sizing of hybrid energy system components in relation to environmental impacts (CO2 emissions) or costs.  It also includes demonstrative case studies. In this respect, the document presents the results of the techno-economic and environmental studies that have been conducted on the three case studies which were developed under Deliverable 3.1. These case studies explore the potential for Nuclear Hybrid Energy Systems (NHES) to supply district heating networks and power grids in Northern and Central Europe, as well as to generate heat and power whilst at the same time producing valuable commodities such as hydrogen in Southern Europe.

This report provides Key Performance Indicators (KPIs) for NHES in three different European locations, taking into account the individual context of each.  Based on the outcomes of the three case studies, it can be concluded that Small Modular Rectors (SMR) can help decarbonise HES.

Furthermore, it is important to note that the results obtained for the three case studies rely significantly on the assumptions included in the assessment. The objective of this work under TANDEM is only there for demonstration purposes.  In addition, even if the report provides a lot of numerical results, it is important to bear in mind the trends and not the exact values as these are only estimates based on different assumptions, the local European context and the time of the study. Finally, further sensitivity studies are also necessary to put these results into perspective given that some uncertain assumptions were taken into account.