Service Turbine Modernization Projects At Susquehanna and Salem Nuclear Plants Maximize Performance at Current and Future Uprate Steam Conditionspresented at Power Gen Europe 2006, Cologne, GermanyThe Susquehanna and Salem Nuclear Plants recently completed major turbine modernization projects that maximized output and addressed goals such as life and license extension, reliability issues, and optimizing the turbine steam paths to the uprated steam conditions. The Susquehanna Steam Electric Station (SSES), a boiling water reactor nuclear plant, upgraded the HP and three LP steam turbines on both its units to maximize performance, address reliability concerns, and to support planned reactor thermal uprates. The Salem Nuclear Plant evaluated similar long term issues and decided to modernize their turbine steam paths to improve performance and optimize their output with flexibility for future steam generator replacement. This involved two HP replacements and three new LPs on both units. Both of these projects utilized a full arc reaction high pressure turbine and an advanced disc design low pressure turbine replacement. This paper will present to the industry the key aspects of these two leading edge projects, which includes provisions for future turbine modifications in at both plants that will further uprate and optimize the steam path to future steam conditions.
Download (PDF)
Inspection Interval Extension and Lifetime Extension of Mature Frame Gas Turbinespresented at PowerGen 2006 - Orlando, FloridaAvailability and Life Cycle Cost (LCC) are two key market drivers that directly impact the profitability of mature frame gas turbines used to produce power for utility, industrial, and co-generation facilities. Siemens Power Generation, Inc. has executed two programs, the Inspection Interval Extension Product (IIEP) and Lifetime Extension (LTE) to address these service market needs. The Inspection Interval Extension Product (IIEP) increases the current Combustor / Hot Gas Path / Major inspection intervals on the SGT6-3000E (W501D5 and W501D5A) gas turbines through the use of enhanced durability component designs that can be implemented during scheduled outages. The specific LTE program discussed in this paper addresses the SGT6-3000E, formerly W501D5 and W501D5A, gas turbine components that are approaching or have surpassed engineered design target lives.
Download (PDF)
Advanced NDE Systems for Flexible Operation and Maintenance of Gas Turbine Components presented at PowerGen 2006 - Orlando, FloridaHot section parts in today's gas turbines have to withstand extreme thermal and mechanical loads and management of their inspection and replacement cycles requires effective use of advanced nondestructive evaluation (NDE) and monitoring technologies. Lower temperature rotating and critical stationary parts, designed for the full life of the unit, also require effective use of NDE technologies to provide opportunities to extend unit life. This paper will provide an overview of advanced NDE systems recently brought into production and service operations at Siemens Power Generation with examples such as active thermography, advanced optical equipment, and on-line monitoring systems.
Download (PDF)
Performance Test Methods to Determine the Benefits of Various Gas Turbine Modernizations and Upgradespresented at ASME Power Conference 2006 - Atlanta, GeorgiaThis paper details some of the difficulties met in performance test methods, and the proposed optimized test protocols and agreements to meet these challenges. As gas turbine fleets age and newer technologies become available, there are opportunities to improve gas turbine based power plant performance by physical modifications to both hardware and software. It is a challenge to determine the effects of the modernizations and upgrades by test, usually known as “comparative testing”.
Download (PDF)
Advancements in Gas Turbine Vane Repairpresented at ASME Power Conference 2006 - Atlanta, GeorgiaThis paper will focus on a variety of Siemens’ technical competencies applied during the restoration of service run vane segments for the turbine section of a gas turbine. The evolution of industrial gas turbines has been a driving factor in the advancement of repair techniques for industrial gas turbine components. Turbine vane segments are among the many components that have been a focus for repair development. Conventional and advanced repair techniques are key elements in the continuing evolution of industrial gas turbine component repair development.
Download (PDF)
Maintenance and support of mature gas turbinespresented at 9th European Fluid Machinery Congress, the Hague, HollandThis paper describes the special needs of supporting long service units from a combined heritage and the issues that are raised. Lifing methods for older machines and describe selected examples of service issues are described. Subjects covered include component obsolescence, material changes, repair versus replacement, retrofits and upgrades. The advantages of retaining an OEM based design authority, with access to the original design data as well as access to current materials and design data is illustrated.
Download (PDF)
Development of the platform for condition-based maintenance presented at Power Gen Asia 2005, SingaporeTo meet the challenges of the market and to improve our customer’s operating plant competitiveness and to ensure mutual profitability, new and innovative maintenance concepts and appropriate technology have to be developed and employed. The driving forces behind this development are the industry's relentless demand for profitability through optimized production and cost control. A new condition-based maintenance concept will precisely fit these new market demands, while today’s time based maintenance concepts do not match these demands.
Download (PDF)
Experience from the use of Siemens diagnostic and monitoring systems. Focus on the use of these systems to increase plant availabilitypresented at Power Gen Europe 2005, Milan, ItalySince the introduction of remote monitoring, Siemens PG have recovered, stored and analysed several million hours of site operating data. This represents valuable information that we are now feeding back into the Company to help us improve the products and services we offer to our customers. As the Original Equipment Manufacturer (OEM), Siemens PG are in a prominent position to be able to use their intimate knowledge of the products, coupled with their expectations of the products, to be able to determine quickly what is at issue when there is an incident. Using the historic data, and the ability to provide remote assistance, Siemens PG can advise customers on the best course of action to take in order to alleviate, or reduce, unnecessary downtime.
Download (PDF)
SGT6-5000F (W501F) Engine Enhancements to Improve Operational Flexibilitypresented at POWER-GEN International 2005This paper describes recent changes made to the SGT6-5000F gas turbine (previously named W501F) to enhance its operational flexibility. The engine is designed for a wide range of operating modes, such as peaking, intermediate and continuous duty. The changes incorporated will further enhance its demonstrated record in flexible operation demanded by the current US market conditions of overcapacity and high fuel prices. This paper describes benefits resulting from these changes, as well as verification testing carried out to validate them. The changes focused on engine operation, performance, component mechanical integrity and combustion system improvements. The paper also summarizes the SGT6-5000F field experience over the 15 years since its introduction and outlines planned improvements for the near future.
Download (PDF)
Experience of Providing a Healthcare Contract for Gas Turbines on Sakhalin Energy’s Molipak Platform presented at Russian Petroleum Technology, Moscow, March 2005This paper illustrates the creation of a Long Term Support Agreement (LTSA) for gas turbines, formulated in partnership with the customer to meet his requirements, to fit legislation and to provide service in a very demanding environment. Technical and legal structure had to comply with the terms of the Production Sharing Agreement (PSA) with the Russian Federation on the development of the Sakhalin II project, taxation, local content, environmental standards and GOST (Russian standards).
Download (PDF)
Maximizing Plant Operational Efficiency and Reliabilitypresented at Electric Power 2004 BaltimoreThe Global demand for cost competitive, reliable and clean electrical power has created intense competition among the various public utilities, government utilities and independent power producers. Consequently the commercial success of an organization depends largely on the operational efficiency and availability of the power station. A first class operation and maintenance (O&M) staff is the key element for superior efficiency and availability of a power plant.
Download (PDF)
Improved Unit Reliability & Availability through Optimised Predictive Maintenancepresented at Power-Gen Europe 2003Siemens Power Generation is focused on providing our customers with solutions that will help reduce the overall maintenance, repair and replacement parts cost while improving overall unit reliability and availability. One simple solution -- predictive maintenance -- is crucial to maintaining your assets and managing your operational costs.
Download (PDF)
Retrofitting Steam Turbines with Modern Control Platformspresented at Power-Gen International 2003Steam turbine owners are being confronted with complex operating processes brought on by deregulation. In order to compete in today’s electrical power market place and meet these complex operating conditions, steam turbine owners have begun to retrofit their steam turbine control systems with modern control platforms. Because these modern control platforms provide better control of the steam turbine, the flexibility to meet the demands of the market can be obtained. The control system design is critical to optimize availability and reliability while minimizing impact on maintenance and capital budgets. Issues such as turbine performance, controls integration and future upgrades are sometimes overlooked when implementing a turbine control system modification. This paper presents examples of steam turbine control system design and integration and offers recommendations for a successful steam turbine control upgrade.
Download (PDF)
Customized Operation and Maintenance for Fossil Power Plantspresented at Power-Gen Europe 2003This paper shall give an overview of the O&M Services shown on the example of the Arrúbal project in Spain as well as the approach to customize services in compliance with different clients and market requirements.
Download (PDF)
|