Boilers

Temperatures:

• Main water feed
• Emergency cooling water
• Pressure vessel cooling water
• Main steam header
• Performance rake – main steam
• Hot reheat header
• Cold reheat header
• Weld leakage monitors (collars)
• Primary header - main steam
• Secondary header - main steam
• Concrete surrounding outlet headers
• Steam valve metal and steam/valve passing
• Dump steam
• Start-up vessel
• De-aerator
• Steam trap passing

Heat Source

Temperatures:

• Concrete
• Recirculating gas
• Liner Vessel penetration

Strain:

• ERTs/vibrating Wire Strain Gauges (VWSG)

Turbine

Temperatures:

• Boiler feed pumps
• Cooling water
• Bearing

Vibration:

• Bearing – magnetic monitors on pumps

Outage work

Preventative:

• Removal and/or protection of instrumentation prior to any grinding/NDT/welding/mechanical works
• Subsequent replacement/repair and/or check

Test/repair:

• Loop resistance/IR/polarity and tightness check via check sheets – subsequent repair/recovery of IR
• Long term monitoring of health of instrumentation via check sheet analysis

Other instrumentation:

• LVDT installation/calibration – boiler movement – crack monitoring
• Calibration/installation of CJC reference units
• ERTs – specialised RTD enabling use as temperature and/or strain measurement (VWSG)
• Strain measurement