Synergies in VVER reactor long-term operation and aging: A comprehensive review of CAMIVVER, DELISA-LTO, and EVEREST projectsMathieu Hursin, Yann Perin, Denis Verrier, Vladimir Slugen and Jana Simeg VeternikovaEPJ Nuclear Sci. Technol., 11 (2025) 17DOI: https://doi.org/10.1051/epjn/2025011