Power transformers

Maintenance of Nuclear Power Plants. Non-Nuclear Components, Generic and I&amp;C Equipments

Figure 1 - Turbine-generator unit during inspection (© Alstom, Lamperti)

Figure 2 - Wing root cracking and breakage

Figure 3 - Ultrasonic examination of stator blades (© Alstom, Lamperti)

Figure 4 - Removal of a BP rotor (© Alstom, Lamperti)

Figure 5 - Principle diagram of an alternator

Figure 6 - SEM view of the inside of a hollow conductor with copper oxide deposits

Figure 7 - Replacing bars on a stator

Figure 8 - Partial exploded view of a 1300 unit condenser

Figure 9 - Inside a condenser tube

Figure 10 - New condenser lung, as part of a modular refurbishment project

Figure 11 - Maintenance of packings in an air cooler (© EDF, Conty)

Figure 12 - Thermal ageing of insulation paper

Figure 13 - Parameters to be continuously monitored to maximize the chances of being warned before major damage occurs

Figure 14 - Vibratory fatigue cracking at the foot of a small spike

Figure 15 - Rupture of a drinking water pipe in Mihama (Japan) following erosion-corrosion degradation

Figure 16 - Unavailability due to valves on the EDF Park

Figure 17 - Diagnosing the operability of a valve and its actuator using the Quicklook system (© EDF, Lavoue)

Figure 18 - Control system checks