Invensys to Supply Upgraded Digital Controls at Energy Northwest’s Columbia Nuclear Generating Station

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Invensys Process Systems will supply Energy Northwest with Triconex ( digital control systems for integrated main turbine and reactor pressure control, and for turbine trip controls at the Columbia Nuclear Generating Station, near Richland, Washington.

Invensys Process Systems will supply Energy Northwest with Triconex ( digital control systems for integrated main turbine and reactor pressure control, and for turbine trip controls at the Columbia Nuclear Generating Station, near Richland, Washington.

Invensys will supply a Tricon TMR (triple-modular redundant) turbomachinery control system for the integrated turbine and critical reactor pressure control functions. A Tricon TMR system will also be utilized for an all new turbine trip digital control scheme, including lube oil, thrust, vacuum pressure and overspeed. The Tricon systems will be integrated with Wonderware’s InTouch HMI (human machine interface) software ( to bring together more than 600 critical monitoring and control system I/O points from the turbine and generator.

In addition, TRISIM Plus software from SimSci-Esscor ( will be utilized to simulate Triconex controls for system checkout and operator training. To support the implementation, Invensys will also supply a range of professional services, including on-site testing, start-up services, and specialized training for engineers and operators. Sargent & Lundy is the A&E (architecture and engineering) firm, providing a range of engineering services including conceptual study, specification development, bid evaluation, plant modification package, procedure update, installation support, and project management support.

The Columbia Nuclear Generating Station is a 1,250-megawatt BWR (boiling water reactor) facility utilizing a Westinghouse main turbine. The new digital systems will replace existing controls in an upgrade project that is on a fast track to meet aggressive Energy Northwest implementation goals.

The TMR architecture provides the highest levels of nuclear industry-required reliability by employing three, isolated, parallel control systems and extensive diagnostics integrated into a single Tricon system. Using two-out-of-three voting, the system provides high-integrity, error-free, uninterrupted process operation with no single point of failure.

For comprehensive control system checkout prior to commissioning, the TRISIM Plus software from SimSci-Esscor will be employed to exactly model the new Triconex control architecture. TRISIM Plus provides comprehensive simulation, facilitating efficient control system design, training, commissioning and start-up. This virtual control system precisely duplicates the operational experience in an off-line, low risk manner and dramatically reduces the time required for commissioning.

About Energy Northwest

Energy Northwest ( is a major public energy resource for public utilities and municipalities in the Northwest region of the United States. Headquartered in Richland, Washington, Energy Northwest is a joint operating agency (JOA), comprising 20 member public utilities from across the State of Washington. The company owns and operates four electricity generating stations: Columbia Nuclear Generating Station, Packwood Lake Hydroelectric Project, Nine Canyon Wind Project, and White Bluffs Solar Station, and provides operations and maintenance services for other facilities. Through its Energy/Business Services organization, Energy Northwest seeks to identify and develop of new generating resources, encompassing both traditional and renewable technologies.

Invensys in the Nuclear Power Industry

Invensys provides products, services and solutions that enable today’s industrial plant operators to monitor, manage, and improve the performance of their plant assets. Invensys includes industry-leading brands such as Foxboro, Triconex, SimSci-Esscor, Wonderware, and Avantis, whose products are installed in more than 100,000 plants across the world. These range from small hybrid and batch plants to the world’s largest power plants, refineries, gas plants, petrochemicals plants, and pulp and paper mills.

For the nuclear power generation industry, Invensys combines systems, engineering, and support capabilities to provide a cost-effective, full-scope solution for plant life extensions. With nearly five decades of nuclear industry experience worldwide, an advanced process control system from Foxboro, 1E certified safety systems from Triconex, and sophisticated simulation tools from SimSci-Esscor, Invensys brings together the expertise and resources to provide the industry’s only fully integrated instrumentation and digital control upgrade solution.

The Invensys Group ( is made up of five businesses: Process Systems, APV, Eurotherm, Rail Systems, and Controls. The Group is headquartered in London and is listed on the London Stock Exchange, with approximately 30,000 employees working in 60 countries.

Invensys, Triconex, Tricon, Wonderware, InTouch, TRISIM Plus, SimSci-Esscor, Foxboro and Avantis are trademarks of Invensys plc, its subsidiaries, or affiliates. All other brands and product names may be trademarks of their respective owners.

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Joni Littleton
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