Competition law essentially aims at preventing harmful distortions of competition in the market which may be caused by agreements between companies, by the abusive behaviour of dominant companies, by structural changes in the market due to mergers or by state aid.1 However, often such practices and measures are actually necessary to render certain services viable, to obtain new or better products, to pursue other policies for the greater benefit of the collective, etc. Occasionally, this raises interesting issues in the nuclear sector.