Unexpected event on Unit 2 of Temelin NPP

Temelin NPP reports the event on Unit 2, May 27 , 2005, at 17:38 hr. During reactor refill up to level of CRDM flanges (planned outage activity during reactor start up after refuelling) primary coolant overflew these flanges. Primary coolant of the amount of app. 3 m3 was collected in the refuelling pit and then was drained to the special waste treatment system. There was no release of radioactive substances outside the controlled area. No person was present in the area of flanges at the time of the event, so no personal contamination has occured.