Configuration of WWER-type steam generator for tube leak location during unit shutdown

The inner compartment of at least one of the two primary steam generator collectors, whose bottom parts are closed with inflatable bags, is connected via the condensate feed tube to the pure condensate and deactivating solution distribution system of the primary section of the nuclear power plant. Through the condensate outlet tube it is also connected, via the superaccident feed piping, to the low-pressure air distribution system of the primary section of the nuclear power plant. All steam generator valves, except for the low-pressure air inlet valve and the drainage valves, are closed. The leak site location is unambiguous, unbiased and sensitive, and even microleaks can thus be disclosed. The possible contamination and exposure of personnel engaged in the leak detection are reduced substantially. (Z.S.). 1 fig