scope:

These recommended practices are concerned primarily with the prevention of water damage to steam turbines used with light water nuclear fueled steam supply systems which produce nominally dry-and-saturated steam. The practices cover design, operation, inspection, testing, and maintenance of those aspects of the following power plant systems and equipment concerned with the prevention of the induction of water into steam turbines and the safe removal of water from steam turbines and associated systems and equipment:

(a) main steam and bypass systems, piping, and drains

(b) crossaround piping, moisture separator, and reheater piping and drains

(c) turbine extraction systems, piping, and drains

(d) turbine steam seal system, piping, and drains

(e) feedwater heaters, piping, and drains

(f) turbine drain system

(g) condenser steam and water dumps

Any connection to the turbine is a potential source of water either by induction from external equipment or by accumulation of condensed steam.