Rosatom, a Russian nuclear energy company, completed the annealing of a large-capacity reactor vessel for the first time. The technology can extend reactor service life by using heat treatment that recovers physical parameters of the metal in a reactor vessel. Rosatom says that annealing could extend the service life of its VVER-1000 by 15-30 years, helping to prevent up to 7.8 billion tons of global CO₂ emissions in total.

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