Post on 26-Mar-2015
Ontario Power Generation: Profile and Performance
Jim Twomey Executive Vice President – Fossil
Ontario Power Generationto the
American Society of Mechanical Engineers Research Committee on Power Plant and Environmental Chemistry
Niagara Falls, Ontario
October 2, 2006
Topics to be Covered
OPG Profile Recent Ontario Electricity Market Developments OPG’s Fossil Fleet OPG Fossil Performance Plant and Environmental Chemistry at OPG Conclusion
OPG Profile
Generated 108.5 TWh in 2005 53.9 TWh in first 6 months 2006
Produces approx. 70% of Ontario’s electricity generation Employs approx. 11,000 employees Operates:
Three nuclear stations (10 operating units, total) Five fossil-fuelled stations 64 hydroelectric stations
Capacity: 22,173 MW (at end of 2005)
Beck 2 GS Lambton GS Pickering B GS
Ontario’s Supply Gap
In December 2005, the Ontario Power Authority released its Supply Mix Advice Report. The Report estimates that Ontario demand will begin to exceed available supply by 2014. By 2025, the OPA estimates the energy gap will be about 10,000 megawatts.
Ontario’s Projected Supply Gap
Source: Ontario Ministry of Energy
Ontario Govt. Response to OPA Supply Mix Report
Double conservation efforts suggested in the OPA report to reduce electricity demand by 6,300 MW by 2025.
Double the electricity from renewables, for a total of 15,700 MW by 2025. Plan for nuclear capacity to meet base-load electricity needs, but limit in-service
capacity of nuclear power to its current 14,000 MW. OPG is directed to begin feasibility study on the refurbishment of its existing facilities
to review the economic, technological and environmental aspects of refurbishment. OPG is directed to begin work on entering into an approvals process, including
environmental assessment for new units to be built at an existing facility.
Develop a revised schedule for the replacement of coal-fired generation with cleaner sources of energy in the earliest practical timeframe.
Maintain the ability to use natural gas capacity at peak times and pursue applications that allow high efficiency and high value use of the fuel.
Enhance transmission to meet the supply mix goals and ensure reliability.
Integrated Power System Plan
Coal 6434 MW
Conservation675 MW
Nuclear*14,000 MW
Gas & Cogen4,976 MW
Renewables7,855 MW
Conservation6,300 MW
Nuclear14,000 MW or less
Renewables15,700 MW
Gas & Cogen9,400 MW (est.)
Gasification250 MW
Ontario Installed Capacity Today Ontario Installed Capacity 2025
• Late 2006: OPA launches IPSP public stakeholder consultation process • March 2007: Final version of IPSP filed with Ontario Energy Board (OEB) • Review of IPSP by OEB -- scheduled completion by early 2008
Source: Ontario Ministry of Energy
OPG’s Hydroelectric Mandate
OPG has a mandate from the government to develop and/or improve its hydroelectric capacity through: expansion and redevelopment of its existing sites
and pursuit of new projects where feasible
Current and proposed hydroelectric initiatives include: Niagara Tunnel (1.6 billion kWh average per year) Lower Mattagami River Development (450 MW) Lac Seul Development (12.5 MW) Upper Mattagami River Development (35 MW)
Hydroelectric Improvements investing an average of $95 million per year to
maintain/enhance hydroelectric capability existing plant capacity increased by 400 MW since
1992. further upgrades will add about another 150 MW by
2015
Niagara Tunnel Boring Machine, “Big Becky”
Government Directives: NuclearNuclear Refurbishment: Ont. Govt. has directed OPG to
Undertake feasibility studies re. refurbishment of units at Pickering B & Darlington sites
Begin Environmental Assessment (EA) on Pickering B refurbishment as part of this process
OPG is now assessing the business case for refurbishing Pickering B
New Nuclear Ont. Govt. has directed OPG to:
Begin federal approvals process for new nuclear units at an existing facility
• Includes an environmental assessment
On Sept. 22, OPG filed application for a Site Preparation Licence for new nuclear units at its Darlington nuclear site
Pickering B
Darlington
Ontario Government’s Coal Policy
Commitment to eliminate coal-fired generation in Ontario. Ontario’s market operator (IESO) reviewed its forecasting
methods and concluded it had under-estimated demand, especially for the summer, by as much as 3,000 MW.
As a result, government decided it can no longer proceed with timetable to close all coal-fired generation by 2009.
Govt. directed OPA to develop a revised schedule for replacing coal at the earliest practical time to ensure system reliability.
OPA to recommend to government on cost effective measures to reduce emissions including greenhouse gas emissions.
OPG’s Approach to Operation of Its Coal Plants
Until coal-plants are closed: OPG to meet all
environmental regulations governing the operation of its coal-fired stations
OPG will make additional, prudent investments in environmental equipment and systems to further improve environmental performance of its coal-fired plants
Lambton GS
Nanticoke GS
OPG’s Fossil Fleet
LambtonNanticoke
Atikokan
Thunder Bay
Lennox
OPG’s Fossil Fleet (contd.): Lakeview GS
Lakeview Generating Station in Mississauga: in service:1961 capacity 1,140 MW lifetime output: 214 TWh 275 employees permanently shut down in April 2005
June 12, 2006: stack demolition Site now being cleared of
remaining equipment Potential for future high-efficiency
gas plant at the site
OPG’s Fossil Fleet (Contd.)
Brighton Beach (in partnership with ATCO Power )
Portlands Energy Centre (in partnership with TransCanada
Energy)
Portlands Energy Centre Update
Toronto needs extra 500 MW by 2010
PEC is a 550 MW high efficiency combined-cycle facility: co-generation capable fuelled by natural gas
Located in Toronto’s Portlands area Environmental assessment and
approvals in place Accelerated Clean Energy Supply
contract signed with Ontario Power Authority
Construction underway First power in 2008; fully operational
by 2009 capital cost: approx. $730 million
Construction Underway
OPG’s Fossil Performance: Fossil Generation & Emissions
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Nuclear Units operating
Nuclear Units laid-up
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Nuclear Units
returning to service
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2005 Fossil Performance Highlights
31 TWh -- 14% increase in generation over 2004 62% increase in summer generation over 2004 OPG Darlington and Nanticoke GS the number 1 and 2 producers
in June and July Lambton GS and Nanticoke GS production increase over 2004 >
provincial increase in demand in 2005 among best years for lowest total acid gas emissions lowest acid gas emission rate ever – 70% reduction over 20 years
Thunder Bay GS
Jan. - June 2006 Fossil Performance Highlights
Produced 12.3 TWh approx. 22% of OPG total
Acid gas emissions: 54,900 tonnes compared to 78,900 tonnes (Q1-Q2 2005) Reduction due to improved acid-gas
emission rates and reduced fossil generation
on track in 2006 to perform better than regulatory limit on acid gas emissions
Continued improved reliability improved equipment reliability at
Nanticoke EFOR declined from 16.1% (Q1-Q2,
2005) to 12.9% (Q1-Q2 2006)
Excellent performance during mid-summer heat wave
Lambton GS maintainers retrofitting new boiler feedpump turbine on Unit 2. This work helped ensure that Lambton’s capacity was at maximum during mid-summer heat wave.
Fossil’s Critical Role as a “Swing” Fuel
New Ontario Demand Record: 27,000 MW set on Aug. 1
Total Ontario energy demand during period: 1.6 million MWh
All OPG stations generated: 1.1 million MWh
OPG’s fossil stations generated: 425 thousand MWh 39 per cent of OPG’s total
production 26 per cent of Ontario demand
(x1000)
Plant and Environmental Chemistry at OPG: a Key Contributor to Performance
Selective Catalytic Reduction SCRs installed 2002-2003 on
Lambton units 3&4 and Nanticoke Units 7&8
OPG first utility in Canada to install SCRs
$250 million investment Chemistry personnel involved in all
major aspects of project Flue Gas Desulphurization
OPG units first in Canada to employ FGD technology
Lambton Gypsum Quality Assurance Lab
Chemistry and environmental personnel key contributors
Mercury Research SCR/FGD technology at Lambton has
led to over 90 per cent mercury capture
Chemistry Transformation at OPG Focus on chemistry has produced
significant cost savings
SCRs at Nanticoke GS
OPG Fossil Chemistry Challenges and Success
Challenge Ineffective Boiler Treatment:
Congruent Phosphate Treatment (Prior to 1986) Chemical cleans every 4 years,
numerous chemically influenced Boiler Tube Failures -
Fossil Units Switch From
Primarily Baseload Operation to Intermediate / Peaking Operation (1980’s-2006) Increased Starts, result in
increased Cycle contamination Events, potentially significantly reducing lifespan of Fossil Generating Assets
Success Equilibrium Phosphate Treatment
(1986 Onward) Chemical clean interval increased to
>10 years, In 1990’s no chemically influenced
Boiler Tube Failures (aside from corrosion fatigue)
Cost Savings: ~$110,000 / Fossil Boiler* / year in Clean
Costs
Chemistry Program Updated Dosing Practices for Start-ups
developed Pressure Dependant Boiler Chemistry
Curves introduced (maximize unit protection, minimize chemistry control Unit restrictions)
Cost Savings: Infrequent holds on Start-ups due to
Chemistry No measurable decrease in Generating
Asset Lifespan from Chemistry Impacts
*In 2006 $’s based on current avg Cost of Boiler Chemical Cleans on 500 MW Units
OPG Fossil Chemistry Challenges and Successes
Challenge Nanticoke GS: Condenser Leaks
(1995-2000) Operation with significant
Condenser Leakage over 5 year period resulted in numerous Overheating Failures
Cost of Overheat Tube Failures: 2001: 3000 FO Hours (~$45,000,000*) 2002: 1200 FO Hours (~$17,000,000*) 2003: 1000 FO Hours (~$13,000,000*)
Lambton GS: HP Turbine Copper Deposits (2001-2003) Excessive Deposition of Copper
on High Pressure Turbines resulting in dramatic loss in Unit Efficiency and Capacity
Cost of Copper Deposition: 2003: $10,000,000* in Loss
Efficiency and Unit Capacity
Success Boiler Condition Improvement Program
(2001-Present) Boiler Chemistry Reporting Program
Developed, Condenser Leakage dramatically reduced
8 Boilers Chemically Cleaned (2001-5) Condenser Condition Improvement
Program Developed
Cost of Overheat Tube Failures: 2005: 0 FO Hours ($0)
Lambton GS Chemistry Management System (CMS) CMS Introduced holistic approach to
chemistry control integrating inspections, chemistry control performance, industry affiliations, etc.
Cost of Copper Deposition: 2004-6: Minor Efficiency Losses
*Cost in Commercial Losses
Plant and Environmental Chemistry at OPG: Reward and Recognition
Chemistry Management System implemented at Lambton and Nanticoke by OPG Fossil employees
Keeps staff regularly informed on chemistry cycle performance
Results reduced losses improved performance improved boiler water chemistry
compliance significant cost savings
Received “Power Within” award, OPG’s highest employee achievement award
Michael Caravaggio (Lambton GS), Jim Twomey (Presenter), Chris Fralick (Nanticoke GS)
Ongoing Importance of Plant and Environmental Chemistry at OPG
Challenges going forward include: copper deposits on HP turbines condenser leakage
OPG’s Chemistry Management System and other station programs enhance our ability to address these challenges
Continuing focus on recruitment of chemistry professionals
Summary
OPG Priorities Going Forward Continuing performance
improvement Contribute to Ontario’s electricity
supply through new power initiatives
Implement Ont. government directives on nuclear refurbishment and new build
Operate coal plants efficiently and in an environmentally responsible manner until they are closed
Ontario Power Generation: Profile and Performance
Jim Twomey Executive Vice President – Fossil
Ontario Power Generationto the
American Society of Mechanical Engineers Research Committee on Power Plant and Environmental Chemistry
Niagara Falls, Ontario
October 2, 2006