After the demineralized water flush, the condensate-feedwater and air preheat systems
shall be drained and refilled with demineralized water.
d) Alkaline Cleaning. The condensate-feedwater and air preheat water
systems shall be alkaline cleaned by injecting the alkaline solution into circulating
treated water, preheated to 200 degrees F (93.3 degrees C) by steam injection, until the
desired concentrations are established. The alkaline solution should be circulated for
a minimum of 24 hours with samples taken during the circulation period. The samples
should be analyzed for phosphate concentration and evidence of free oil. The feedwater
heaters and drain piping shall be alkaline cleaned by soaking with hot alkaline cleaning
solution in conjunction with the condensate-feedwater and air preheat water system
alkaline cleaning. The heater shells and drain piping should be drained once every six
hours during the circulation of the alkaline cleaning solution through the condensate-
feedwater and air preheat water systems. After the alkaline cleaning is completed,
flush the condensate-feedwater, air preheat water, feedwater heater, and drain piping
systems with demineralized water.
e) Acid Cleaning. Acid cleaning of the condensate feedwater and air
preheat water systems shall be similar to the alkaline cleaning, except that the
circulation period shall only be six hours. The condensate-feedwater and air preheat
water system shall be heated to 200 degrees F (93 degrees C) and hydrazine and ammonia
injected into the circulating water to neutralize the acid solution. The systems shall
then be flushed with demineralized water until all traces of acid are removed.
18.104.22.168 Turbine Lube Oil Flush and Recirculation. The lubricating and seal oil
systems of the turbine generator shall be cleaned as recommended by the manufacturer.
Oil samples shall be tested to determine contamination levels. The cleaning shall be a
cold flushing of the system and cleaning of the oil reservoir. This shall be followed
by cycling of circulating hot and cold oil until the system is clean.
22.214.171.124 Preliminary Checks. Preliminary checks and inspection, and any required
corrective work shall be performed on all equipment in accordance with the equipment
a) Shaft Alignment.
All bearings, shafts, and other moving parts shall be
checked for proper alignment.
b) Linkage Alignment. Manual set of all linkages shall be performed,
ensuring open and close limit adjustment. Operational linkage adjustment shall be
performed as required.
c) Safety Equipment.
All coupling guards, belt guards, and other personnel
safety items shall be installed.