WESTINGHOUSE 1C31166G01 serial port link controller – the “gateway” of critical task systems, ensuring accurate and error free data transmission!

The WESTINGHOUSE 1C31166G01 is a Class 1E-certified Reactor Coolant Pump (RCP) Monitoring Module designed for critical vibration and temperature surveillance in nuclear power plants. As part of Westinghouse’s Engineered Safety Features Instrumentation (ESFI) platform, this IEEE 603-compliant module provides continuous monitoring of RCP bearings, motor stators, and thermal barriers in pressurized water reactors (PWR). The 1C31166G01 processes signals from accelerometers and RTDs, executing redundant safety logic to initiate reactor trips upon detecting abnormal mechanical conditions that could lead to loss-of-coolant accidents (LOCA). Its radiation-hardened design withstands 75 kRad TID (Total Ionizing Dose) and maintains seismic Category I performance (IEEE 344) during operational basis earthquakes. For nuclear operators requiring NRC-compliant pump health monitoring, the WESTINGHOUSE 1C31166G01 delivers deterministic <100ms>

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Description

The WESTINGHOUSE 1C31166G01 is a Class 1E-certified Reactor Coolant Pump (RCP) Monitoring Module designed for critical vibration and temperature surveillance in nuclear power plants. As part of Westinghouse’s Engineered Safety Features Instrumentation (ESFI) platform, this IEEE 603-compliant module provides continuous monitoring of RCP bearings, motor stators, and thermal barriers in pressurized water reactors (PWR). The 1C31166G01 processes signals from accelerometers and RTDs, executing redundant safety logic to initiate reactor trips upon detecting abnormal mechanical conditions that could lead to loss-of-coolant accidents (LOCA). Its radiation-hardened design withstands 75 kRad TID (Total Ionizing Dose) and maintains seismic Category I performance (IEEE 344) during operational basis earthquakes. For nuclear operators requiring NRC-compliant pump health monitoring, the WESTINGHOUSE 1C31166G01 delivers deterministic <100ms>

Integrated with Westinghouse’s Digital Integrated Protection System (DIPS), this module features automatic sensor validation and drift compensation to prevent spurious trips. Dual-isolated 4–20mA outputs interface with control room recorders, while Form-C relays enable hardwired shutdown logic. The 1C31166G01‘s modular design supports hot-swap replacement during refueling outages, and its conformal-coated circuitry resists humidity and hydrogen atmospheres in containment penetrations.

WESTINGHOUSE 1C31166G01

Technical Specifications

Parameter Name Parameter Value
Product Model 1C31166G01
Manufacturer Westinghouse Electric Company
Product Type Pump Monitoring Safety Module
Input Channels 8 (4 vibration, 4 temperature)
Vibration Range 0–25.4 mm/s RMS (0–1 in/s)
Temperature Range 0–200°C (RTD input)
Accuracy ±0.5% reading ±0.1% FS
Trip Response Time ≤ 100 ms
Output Signals 4–20mA (dual-isolated), 6 Form-C relays
Alarm Setpoints 4 vibration, 4 temperature (NRC-approved)
Safety Certification Class 1E (IEEE 603), IEC 61513
Environmental Qualification Seismic Cat I (5g sine/12g shock), 75 kRad
Operating Temperature -10°C to +55°C (14°F to 131°F)
Power Supply 125V DC ±10% / 48V DC backup
EMI Immunity 200 V/m (IEEE C37.90.2)
Calibration Stability <1>
MTBF > 300,000 hours
Dimensions 320 x 230 x 85 mm (12.6 x 9.1 x 3.35 in)

Main Features and Advantages

Multi-Parameter Safety Logic:

Simultaneous monitoring of bearing vibration (4–1000 Hz), stator winding temperatures, and thermal barrier gradients

Configurable 2/3 voting logic with adjustable time delays for transient suppression

Advanced Diagnostics:

Automatic RTD lead resistance compensation

Vibration sensor open/short detection with fail-safe annunciation

Continuous cross-channel validation for fault isolation

Seismic Resilience:

Component-level qualification per IEEE 344

Resonance avoidance design (>35Hz natural frequency)

Conformal coating for humidity/corrosion resistance

Regulatory Compliance:

Pre-validated setpoint methodologies per NRC Regulatory Guide 1.105

Full FSAR references and QAM-1 manufacturing records

NUPIC-compliant calibration documentation

Application Field

The WESTINGHOUSE 1C31166G01 is mission-critical in PWR nuclear safety systems:

RCP Bearing Protection: Detects incipient bearing failures in vertical RCPs before seizure occurs

Thermal Barrier Monitoring: Prevents shaft seal degradation by tracking coolant temperature differentials

Stator Overheating Prevention: Initiates reactor trips when motor temperatures exceed ASME III limits

LOCA Risk Mitigation: Provides early warning of RCP mechanical failures that could cause primary circuit breaches

Post-Accident Monitoring: Survives design-basis accidents to monitor pump status during emergency cooling

Installed in containment Class 1E instrument racks, the 1C31166G01 interfaces directly with Westinghouse RCPs (93G/100D series) and serves as the primary input for ESF-1 (Emergency Core Cooling) systems.

WESTINGHOUSE 1C31166G01

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WESTINGHOUSE 1C31166G02: Enhanced version with digital bus communication

WESTINGHOUSE A6000S: Seismic-qualified accelerometer kit for 1C31166G01 integration

WESTINGHOUSE 1C31444G01: Class 1E power supply for monitoring chassis

WESTINGHOUSE 1C31316G01: Signal conditioner for legacy pump systems

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