3. Turbine components

3.1 Moving parts (or rotors)

We saw earlier (§ 1.1) that the scale of major accidents is a consequence of the energy levels stored in the rotors. We are concerned here with the maintenance actions that concern these components alone, designed to guarantee their integrity, bearing in mind that maintenance aimed at limiting the risk of runaway of the shaft line is dealt with in the paragraph on steam inlet components (§ 3.2 ).

Steam turbines are equipped with rotors of three different...