In the aftermath of the Fukushima accident, the Commission, together with the European Nuclear Safety Regulators' Group (ENSREG), have carried out stress tests, which resulted in a number of recommendations and a suggestion to change the Nuclear Safety Directive. This proposal aims at amending, strengthening and supplementing the directive by combining technical improvements with wider safety issues such as governance, transparency and on-site preparedness and response.
 
The S&D Group (and the report) supported the provisions on periodic self-assessments with peer reviews as well as six-year topical peer reviews, including the provision that the subject of the first topical peer review should be decided upon within three years of the directive entering into force.