The Nuclear Safety Directive 2014/87/Euratom requires EU Member States to undertake, every six years, national assessments on a specific topic related to nuclear safety, followed by a peer review by other Member States, with the European Commission as an observer.
The first topical per review took place in 2017 and 2018 and concerned the 'ageing management' of nuclear reactors or, more specifically, the ageing effects on structures, systems and components.
National reports are available here: http://ensreg.eu/country-specific-reports
National action plans had to be submitted by September 2019 and they are available here: EU Member States / Other countries
Disclaimer: Please note that all plans are the property of the individual Member State and not ENSREG.