The establishment and/or maintenance of economic and social security constitute aspects of sustainability that are often neglected in scientific and policy debates on sustainable development. In particular, the issue of whether a secure energy supply can be guaranteed in the long run (nationally or internationally) contributes to the level of sustainability societies can reach. Not only the access to various energy resources, but also the volatility of fuel prices for different energy alternatives, determine how secure a country can be in its ability to acquire and afford the energy it needs to fuel its economy. The capacity of a country to provide its economy with necessary energy resources also contributes to determining the welfare level it may reach. International cooperation, both at the EU level and on a global scale, remains one of the keys to enhancing energy security, and thus to the sustainability that a country may attain. While it may not be straightforward to quantify the social and economic dimensions of energy supply security, in this project aspects of energy security in the broader analysis and modelling of sustainability were included.

• An overview and assessment of existing research on energy supply security.
• An outline of a proposal for improving energy security considerations in current modelling approaches
• Identification of potential policies aimed at improving energy security.

• An Overview of Selected Studies on the Value of Lost Load (VOLL)

ECN (lead), SMASH