The Phase 1 (No. 1 and 2 reactors) at the Kola NPP went online in 1973 and 1974, respectively, and are part of Russia’s first generation of PWR reactors (the WWER 440/230 type). The Phase 2 (No. 3 and 4 reactors) went online in 1981 and 1984 with the improved WWER 440/213 type.