This international seminar, held in Tarragona, Spain on 2-4 September 2003, was conducted in connection with the entering of the Vandellòs-I nuclear power plant into the safestore period. The seminar focused on strategy selection for the decommissioning of nuclear facilities. All the major types of facilities encountered in the nuclear fuel cycle were represented. Over 100 high-level specialists from all over the world attended, including representatives of the Regulatory Commission of Spain and decommissioning projects managers from Spain, UK, USA, Japan, Italy, Slovak Republic, France, etc. Several mayors from both Europe and North America also attended. The seminar encouraged open discussions to share lessons learnt.