Invensys Implementing Foxboro Automation Systems at World's Largest Undeveloped High-grade Uranium Deposit |

Invensys Implementing Foxboro Automation Systems at World's Largest Undeveloped High-grade Uranium Deposit

June 292005
FOXBORO, MASSACHUSETTS, USA - June 29, 2005 - Cameco Corporation, the world's leading uranium producer, has selected Invensys Process Systems to implement a Foxboro ( automation system at the Cigar Lake Mine in Saskatchewan, Canada. The system will monitor and control all key mining production operations at Cigar Lake, the world's largest undeveloped high-grade uranium deposit. The implementation includes the latest I/A Series V8.0 hardware and software, engineering services, training, field services, and Foxboro HART-based field instrumentation for processes bid to date.

The I/A Series automation system for Cigar Lake is highly distributed. The newest generation I/A Series family field-mounted control processors is being deployed at various stages of the uranium mining process, having started with the shaft concrete plant and freeze systems (ore body stabilization) plant, to be followed by underground ore handling, grinding operations, slurry load-out, and waste water treatment. A variety of field I/O platforms are being deployed, integrating HART combined analog and digital signals with Ethernet and serial connections to third-party devices. The I/A Series system will also interface with Modicon PLC systems using Foxboro's latest field device system integrator I/O modules.

Cameco implementation of the Foxboro control automation project is in two stages. The shaft concrete plant and freeze systems are being implemented now for completion in Fall 2005. Automation for the balance of the Cigar Lake Mine operations is projected to be complete in 2007.

The Cigar Lake automation project extends Invensys presence at Cameco. The company's largest uranium operation at McArthur River Mine, also in Saskatchewan, has been benefiting from extensive I/A Series automation implementation since 1999.

About Cameco Corporation
Cameco Corporation, headquartered in Saskatoon, Saskatchewan, is the world's largest uranium producer. The company's uranium products are used to generate electricity in nuclear energy plants around the world, providing one of the cleanest sources of energy available today. Cameco's shares trade on the Toronto and New York stock exchanges. More information on Cameco and the Cigar Lake Mine can be found at

About Invensys Process Systems
Invensys Process Systems, a business unit of Invensys plc, provides products, services and solutions for the automation and optimization of industrial process plants. In addition to its rapidly expanding Global Solutions group, Invensys Process Systems 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 refineries, gas plants, petrochemicals plants, power plants, and pulp and paper mills.

The Invensys Group ( is headquartered in the UK and listed on the London Stock Exchange. With 35,000 employees operating in 60 countries, Invensys helps customers to improve their performance and profitability, building value for end users and shareholders alike.

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