Them pipes get brittle under radiation exposure. Hope they have a plan for replacement.
Generally, most of the European/Russian nuke plants had a 20-year operating plan, then a full-year or two of maintenance/inspection (down-time), then a certificate would be created to say it was worthily for 20 more years, and the on-switch would be flipped.
Radiation fatigue of the metal in reactors is why regular monitoring and replacement as needed are now the industry practice.