Maximizing Electrical Output at ComEd Nuclear Stations by David J. Miller Kevin Rumbaugh James Rafferty and Gary Loeb.

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Presentation transcript:

Maximizing Electrical Output at ComEd Nuclear Stations by David J. Miller Kevin Rumbaugh James Rafferty and Gary Loeb

ComEd Background ComEd operates 5 Nuclear Stations in Northern Illinois All five stations contain dual units –Braidwood - Dual 1188 MW Units –Byron - Dual 1183 MW Units –Dresden - Dual 832 MW Units –LaSalle - Dual 1140 MW Units –Quad Cities - Dual 819 MW Units All units will be uprated 5 to 10% All units will apply for NRC license renewal

PI System Configuration Each site has local PI 3.2 server on NT 5K to 10K tags per server 5 years of on-line storage space available Main Plant Process Computers: –Honeywell 4010/4500 –Re-hosted Westinghouse 2500 systems

How PI is utilized PI does not provide any “control” Most controls in a nuclear plant are analog Most of the protection circuitry is analog –hard wired, relays, bi-stable switches, etc. Very few digital systems actually provide “control” Plant Process Computers monitor plant systems PI provides –multi-user real time monitoring –fast retrieval of historical data

Getting Data to the End User Using existing company LAN/WAN for company wide connectivity Using standard company WIN95 desktop PCs for ProcessBook/Datalink 130 ProcessBook/Datalink licenses distributed throughout nuclear division Engineers at each site can access all sites’ data

ComEd NGG PI Systems Typical Station LAN WIN95 ProcessBook Datalink Transmission & Distribution Braidwood Central Quad Cities Byron Dresden LaSalle ComEd WAN Corporate Office PCs Nuclear Ops Center

PI System Data Sources for PI Plant Process Computer Operator Rounds DEH System Chemistry Data

Uses of PI Executive Overview of nuclear unit status Standard ProcessBooks for plant systems Electronic Operator Rounds Thermal Performance Optimization

Executive Overview Display Central server collects data via PI to PI from all nuclear site servers Data consists of: –electrical generation (MWs) –and reactor power (%) ComEd electrical grid system information obtained from T&D PI system PI Performance equations calculate total nuclear contribution to system net load

Executive Overview Display (cont.) Provides near real-time view of all ComEd owned generation All nuclear personnel can access PI Lets each site see how they contribute to the overall power generation and load profile Large display in Corporate Operations Center used for quick reference CEO has ProcessBook and the display on his laptop

Executive Overview Display Demo

Standardized Plant ProcessBooks Developed standard processbooks for each unit Created using common active symbols and color schemes Consist of a simplified overview of the entire steam cycle Each system has its own tab (30 to 50 tabs) Created buttons to jump from tab to tab Buttons used to drill down into data –provide next layer of data –displays trends

LaSalle Overview Demo

LaSalle Turbine/Generator Demo

LaSalle Recirc Pump Demo

Electronic Operator Rounds Operators use the NOMS software for collection and storage of data Data collected using hand-held Husky Data Logger Data is fed to an Oracle Database Interface Program NOMS 2 PI –Downloads data once per evening –Allows engineers to display rounds data along with process computer data

Thermal Performance Optimization Using DataLink to download plant data to Excel Common Excel spreadsheet developed for each unit –Specific unit selected by clicking on one button –Calorimetric calculations or heat balance done on live data –Calculation performed on demand or runs continuously

Thermal Performance Optimization (cont.) Simplified for Operators –Displays Reactor, Turbine and Condenser parameters –Compares actual values to theoretical best –Shows off-normal values –Gives Operators potential equipment problems to investigate and correct –Calorimetric calculations are transparent to Operators

Thermal Performance Demo #1

Thermal Performance Demo #2

Looking towards the Future ComEd merging with PECo Merger expected to occur on Aug. 1, 2000 New company called Exelon Nuclear Stations will be grouped by region Midwest Regional Operating Group –will include existing ComEd Nuclear fleet –plus Clinton Nuclear Station

Looking towards the Future (cont.) Clinton Station owned by Amergen –Amergen owned by PECO and British Nuclear Clinton located in Central Illinois Clinton is a single unit station Clinton will need a PI Server to communicate with the Midwest ROG

Mid-Atlantic ROG Mid-Atlantic Regional Operating Group –Limerick –Peach Bottom –Three Mile Island –Oyster Creek Establishing a Regional Operations Center Mid-Atlantic ROG installing PI to monitor units –100 tag systems per station initially –Executive Display will be similar to one developed for ComEd Group

Additional Uses of PI System PI Historian primary repository for all time-series historical plant data Use PI as the backbone for System Engineer Workstation Chemistry Parameter Displays Integrate Plant Process Computer and PI; use PI as PPC’s real-time database Increase scan rate for data Troubleshooting and event analysis Auto /pager notification when a system fails Take over functions of GSEP system

GSEP Point History (Old Historian vs PI) 1 minute resolution 50 MB per day Only 100 out of 1200 turbine points Each system has custom interface 5 second resolution 10 MB per day All 1200 points are available Common interface, namely Process Book

Conclusion End Users have to be given some examples of how PI can be used After that, allow creativity and innovation to flourish