Page 334 - Corrosion Engineering Principles and Practice

304 C h a p t e r 8 Device Applications Monitoring Results

Biofouling Boiler tubes Detection of biofouling,
monitor collection of organic matter
In situ pH Boiler tubes Susceptibility to general
and corrosion and localized corrosion
potential
Heat flux gauge Deposit buildup in turbines Value of local heat flux,
type of boiling, potential
for impurity concentration
Chordal Deposits and erosion in Boiler tube temperature
thermocouples turbines vs. scale
Rotor position Damage to thrust bearing
and thrust caused by deposit
bearing wear accumulation on blades
Turbine first- Degree of deposition or
stage pressure erosion of control stage

TABLE 8.11 (continued)

Steam temperature
& pressure

Mass flow
Fluid level

T 1 T 2
T 3
T 4
Temperature T 7 T T 5
6
Feedwater temperature
(Local distribution)

Primary outlet Primary entry
temperature Temperature, pressure

FIGURE 8.20 Measurement points for monitoring of a pressurized water
reactor (PWR) steam generator.

305