…in case of steam generator or one of process steam engine system component parts failure.

http://www.buzzle.com/articles/how-a-steam-engine-works.html
Components and accessories of steam engines
There are two fundamental components of a steam plant: the boiler or steam generator, and the "motor unit", referred to itself as a "steam engine". Stationary steam engines in fixed buildings may have the boiler and engine in separate buildings some distance apart. For portable or mobile use, such as steam locomotives, the two are mounted together
Complete steam engine system
http://opensourceecology.org/w/images/5/58/Integrated_Energy...