Experience of using loose parts monitoring systems at Novovoronezh NPP

In VVER reactor plants, it is impossible to completely exclude the appearance of loose, loosely fixed and foreign objects in main circulation circuit. Operational experience shows that early detection estimation parameters such incidents can provide time required eliminate or minimize damage equipment plant. For this reason, most modern power units with pressurized water reactors (PWR, VVER) are equipped a loose parts monitoring system (LPMS). At under construction, these systems laid down as standard ones; put into commercial operation Soviet period were also them. The requirements for them established by international standards. Ongoing research work area aimed at determining root cause acoustic anomaly localization its epicenter. Also, no less significant works mass object (LO). precise definition parameter will make possible have an idea nature LO before withdrawal from primary circuit conclude about whether accidentally found detached part steam generators, pumps, internal devices shut-off control valves.