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Overview TRUenergy Yallourn

Overview TRUenergy Yallourn. June 2008. TRUenergy. Hallett. Gas-. fired peaking station. 180. Mass market. Newport and Jeeralang. Electricity - 700,000 customer accounts Gas – 500,000 customer accounts. Gas-fired power station. 966. GreenPower. Tallawarra. Roaring 40’s.

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Overview TRUenergy Yallourn

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  1. Overview TRUenergy Yallourn June 2008

  2. TRUenergy Hallett Gas- fired peaking station 180 Mass market Newportand Jeeralang Electricity - 700,000 customer accounts Gas – 500,000 customer accounts Gas-fired power station 966 GreenPower Tallawarra Roaring 40’s Management of wind assets in Australia, China and India Stage A CCGT (construction) Stage B OCGT (development) 400 500 350 Gas assets Details Retail assets Retail footprint Industrial customer 7 TWh ~50,000 customer accounts Electricity assets Site MW Yallourn Brown coal - fired base load station and mine 1,480 Brisbane – Tallawarra Adelaide Cathedral Rocks wind farm Sydney Iona Gas storage facility 12 PJ gas storage facility Hallett Melbourne Yallourn SEAGas 33% owner SEAGas Pipeline Pipeline Newport and Jeeralang TRUenergy – a major national integrated energy company Iona Gas Storage Studland Bay wind farm Bluff Point wind farm AGILITY, ACHIEVEMENT

  3. TRUenergy Yallourn Divider / Section title Sub Title Line

  4. Plant Statistics • Brown Coal Fired Units – burning coal of 65% moisture • 30 Year Old Plant • Unit 1 and Unit 2 - Commissioned 1974 / 75 (Stage 1) • John Thompson boiler – Traditional Drum • 350MW Toshiba/GE derived turbines • Design Thermal efficiency 32% • Unit 3 and Unit 4 - Commissioned 1981 / 82 (Stage 2) • International Combustion boilers – Semi Once Through • 375MW Toshiba/GE derived turbines • Design Thermal efficiency 34%

  5. Plant Data • Unit 1 Unit 2 Unit 3 Unit 4 • Commissioned 1974 1975 1981 1982 • MCR (MW) 350 350 375 375 • Running Hours 240,000 232,000 200,000 194,000 (To End 07) • Average starts/year 10 10 12 15 • Notional Design Life = 30 Years

  6. History • Built for the State Electricity Commission of Victoria as part of utility fleet serving Victoria • Generation as part of Government Instrumentality • Station Privatised 1995/96 - POWERGEN • China Light and Power Purchase 2001 • Plan life mid 2020’s • Coal Quality • Low energy coal 7.3 MJ per kg LHV • Low sulphur 0.23% dry basis • Low ash 2% dry basis • High moisture content 63% - 65%

  7. Yallourn Site General Manager Yallourn Commercial Manager HR Manager Mine Manager Power Station Maintenance Manager (Alliance Manager) Operations Manager Asset Manager RTL Alliance Operations And Maintenance Mine Infrastructure Group (TRUenergy) Commercial Team Estate Services Alliance Asset Management Team Safety Health & Environmental Team Alliance Teams Mix of TRUenergy And Silcar Ops Teams Chemists Ops Performance Mine Maintenance Silcar Sub-Alliance Organisation Chart - Yallourn

  8. Alliances TRUenergy Yallourn – Alliance Contracts POWER STATION MAINTENANCE – Alliance With SILCAR - Teams combination of TRUenergy and SILCAR personnel MINE - Alliance with RTL - RTL Sub Alliance with Silcar for Mine Maintenance SECURITY & SUPPORT SERVICES - Alliance with Estate Services (Infraserve)

  9. Personnel Breakdown Total Site Including Mine = 493 People

  10. Plant Performance

  11. Operating Regime OPERATES IN NATIONAL ELECTRICITY MARKET Bids to generate on 5 minute basis with payment on half hour Base Load running Part of TRUenergy portfolio of Generation, Gas and Retail business Market can be volatile and unpredictable

  12. Yallourn Mine – Changed Mining Method

  13. Traditional Brown Coal Mining

  14. Dozer Technology

  15. Recent Major Activities • Relocation of Morwell River to run through mine area • Conversion of four units and common plant from analogue to digital controls • Reblading of LP Turbine Last Stage Blades. • Repack of RAH’s in Stage 1. • Rewind of Unit 2 Generator.-2006 • New Condenser in Unit 4 -2004

  16. PROJECTS • Two new HIP Turbines to be installed on Stage 2 Units. 3% Efficiency improvement. • Refurbish of Cooling Tower 3 Internals • Re-tube Condenser U3. 2009

  17. Morwell River Diversion (MRD) • Embankment geometry • 3.5km clay lined channel • 13 million cubic metres earth • Channel designed for 1:10,000 year probability flood • 70 m wide trapezoidal channel, 10 m deep • Toe weights for stability on east and west sides of embankment • Instrumentation and survey to monitor pressures and movements

  18. Major Challenges CARBON FOOTPRINT - BROWN COAL - High moisture (65%) results in low energy per kg and need to burn three times the amount compared to black coal - CO2e produced approximately 1.3 tonnes per megawatt hour sent out - Low in ash and low in sulphur WATER SUPPLY - Low rainfall country - Focus on saving water - Competing demands for use of resource

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