Overview

The Triconex 3008N is a highly reliable Main Processor (MP) module designed for use in Tricon V9 and V10 Triple Modular Redundant (TMR) safety systems. As part of the "N" series, this module is Nuclear-qualified, meeting the stringent seismic, environmental, and electromagnetic immunity standards necessary for safety-critical applications in nuclear power plants. The 3008N acts as the processing unit for the Tricon system, ensuring the integrity, redundancy, and fault tolerance required in safety-related (1E) systems.

In a TMR configuration, three 3008N modules work in parallel, independently processing data and performing "voting" logic to ensure accurate system control. This architecture ensures that the system remains operational even if one processor fails.

Core Capabilities

1. Triple Modular Redundant (TMR) Voting Logic

• Each 3008N module performs voting on input and output data, ensuring system integrity through 2-out-of-3 voting. If one processor fails, the remaining two continue to operate, preventing false trips or system shutdowns.

2. Fault Tolerance (3-2-0)

• The 3008N ensures that in a 3-way configuration (all processors healthy), the system operates normally. In a 2-way configuration (if one processor fails), the system continues operation, automatically excluding the faulty processor. A 0-way configuration (two processor failures) triggers a safe system shutdown to protect the safety functions.

3. Nuclear Qualification (N-Series)

• The 3008N is manufactured under a strict quality program that meets 10 CFR 50 Appendix B standards for nuclear facilities. It is subjected to rigorous testing for seismic ruggedness and high resistance to electromagnetic and radio-frequency interference (EMI/RFI), ensuring its reliability in harsh environments.

4. Diagnostic Indicators

• PASS: Indicates successful self-test completion.

• FAULT: Illuminates when a hardware fault is detected.

• ACTIVE: Shows that the processor is actively performing its control task.

• MAINT: Signals a maintenance requirement, such as low battery or internal errors.

• The front panel of the 3008N is equipped with critical LED indicators to provide real-time status updates:

5. Memory and Processing Power

• SRAM: 16 MB (battery-backed) for real-time processing.

• Flash Memory: 6 MB for program storage.

• Clock Speed: 50 MHz, ensuring fast and reliable data processing.

Technical Specifications

Applications

The Triconex 3008N is ideal for use in nuclear power plants, critical industrial control systems, and other applications where system redundancy and fault tolerance are paramount. It ensures continuous operation of safety-critical systems by providing highly reliable processing power and real-time decision-making capabilities.

Installation and Maintenance

• The 3008N module is designed to be installed in the standard slots of the Tricon V9 and V10 chassis, supporting a 3-way redundant configuration.

• Maintenance indicators such as the MAINT LED provide early warnings of potential issues, allowing for proactive management and replacement before system integrity is compromised.

FAQ

Q1: How does the 3008N ensure system reliability?
A1: The 3008N employs a TMR voting logic system where all three processors independently assess input data. If one processor fails, the remaining two continue to function, ensuring uninterrupted operation.

Q2: Is the 3008N suitable for use in nuclear facilities?
A2: Yes, the 3008N is Nuclear-qualified, meeting all the rigorous seismic, EMI, and environmental standards required for safety-related (1E) applications in nuclear power plants.

Q3: What are the diagnostic features of the 3008N module?
A3: The 3008N features a set of LEDs to indicate real-time status, including PASS, FAULT, ACTIVE, and MAINT to ensure system health and prompt maintenance actions.