1 January 2000

Table 1: Sensors in a reference 4-loop PWR reactor
Type Measurement Typical number
Resistance temperature detectors (RTDs) Temperature 16-60
Core-exit thermocouples (CETs) Temperature 50-100
Pressure transmitters Pressure, level and flow 500-2500
Neutron detectors (ex-core and in-core) Neutron flux 10-20

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