On the results of the maintenance of GCU No.24 at the Portovaya CS.
During routine maintenance of the Trent 60 gas compressor unit (GCU No.24) of Portovaya CS, carried out jointly with the representatives of Siemens, oil leakage was detected with an admixture of sealing compound at the connectors of cable connections of low and intermediate pressure rotor speed sensors.
Oil was detected on the cable connector of the BPE2 connection plate, which is part of the motor.
Oil was also found in the area of the cable line in the external terminal cabinet of the automatic control system of the GCU outside the noise-insulating casing. The act of oil leak detection was also signed by Siemens representatives.
A warning was received from Rostechnadzor of Russia stating that the detected faults and damages do not allow ensuring safe accident-free operation of the gas turbine engine. In this connection, it is necessary to take appropriate measures and suspend further operation of the Trent 60 gas compressor unit due to the revealed gross violations.
Similar oil leaks had earlier been detected on GCUs with engines №075, №076, №120, which had gone through a factory overhaul and were at the moment in the state of forced outage. In accordance with the information of Siemens, these engines can only be completely eliminated by a specialized repair company.
A letter about the faults detected on the Trent 60 unit (No. 24) and the need to fix them was sent to the President and CEO of Siemens Energy AG, Christian Bruch.
Until the equipment malfunctions are corrected, gas transport to the Nord Stream gas pipeline is completely stopped.
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