• Title, Summary, Keyword: Nuclear Turbine

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Development of Performance Analysis System (NOPAS) for Turbine Cycle of Nuclear Power Plant

  • Kim, Seong-Kun;Park, Kwang-Hee
    • Nuclear Engineering and Technology
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    • v.33 no.1
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    • pp.34-45
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    • 2001
  • We have needs to develop a performance analysis system that can be used in domestic nuclear power plants to determine performance status of turbine cycle. We developed new NOPAS system to aid performance analysis of turbine cycle . Procedures of performance calculation are improved using several adaptations from standard calculation algorithms based on ASME (American Society of Mechanical Engineers) PTC (Performance Test Code). Robustness in the performance analysis is increased by verification & validation scheme for measured input data. The system also provides useful aids for performance analysis such as graphic heat balance of turbine cycle and components, turbine expansion lines, automatic generation of analysis reports.

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PERUPS (PERFORMANCE UPGRADE SYSTEM) FOR ON-LINE PERFORMANCE ANALYSIS OF A NUCLEAR POWER PLANT TURBINE CYCLE

  • KIM SEONGKUN;CHOI KWANGHEE
    • Nuclear Engineering and Technology
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    • v.37 no.2
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    • pp.167-176
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    • 2005
  • We developed the PERUPS system to aid the on-line performance analysis for the turbine cycle of the YongGwang 3 and 4 nuclear power plants. Procedure of measurement validation is included in the performance calculation to obtain heat balance. Precision of on-line performance calculation is increased via practical modifications of standard calculation algorithms based on the PTC (Performance Test Code). The proposed system also provides useful Web-based aids for performance analysis, including performance data management, a graphic viewer for heat balance and turbine expansion lines, and synthesized reports of performance.

Analysis of High Vibration in Nuclear Turbine-Generator (원자력 발전소 터빈-발전기 고진동 저감에 대한 고찰)

  • Lee, Woo-Kwang;Ko, Woo-Sig;Kim, Kye-Yean;Koo, Jae-Raeyang
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.46-50
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    • 2007
  • The nuclear power plant's turbine-generator system had been suffered form some problems, such as high shaft vibration, generator casing crack, stator coil water leakage, high $H_2$ gas consumption rate. Those kinds of problems were related to high vibration. So nuclear plant decided to replace generator in order to reduce rotor high vibration and high thermal sensitivity. A series of effort to reduce turbine-generator vibration was carried out as followings, first of all, replacement of generator, analysis of turbine-generator vibration, LP B rotor shop balancing, improvement of LP B/Gen coupling run-out, improvement of Generator basement and field balancing. Finally the nuclear turbine-generator's shaft vibration was reduced below $60{\mu}m$ from over $200{\mu}m$ which is very excellent vibration in nuclear turbine-generator in Korea.

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Load Test Simulator Development for Steam Turbine-Generator System of Nuclear Power Plant

  • Jeong, Chang-Ki;Kim, Jong-An;Kim, Byung-Chul;Choi, In-Kyu;Woo, Joo-Hee
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1384-1386
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    • 2005
  • This paper focuses on development of load test simulator of a steam turbine-generator in a nuclear power plant. When load is taken off from electrical power network, it is very difficult to effectively control the steam flow to turbine of the nuclear turbine-generator, because of disturbances, such as electrical load and network unbalance on electrical network. Up to the present time, the conventional control system has been used for the load control on nuclear steam generator, owing to the easy control algorithms and the advantage which have been proven on the nuclear power plant. However, since there are problems with stability control during low power and start-up, only a highly experienced operator can operate during those procedures. Also, a great deal of time and an expensive simulator is needed for the training of an operator. The KEPRI is developed simulator for 600MW nuclear power plant to take a test of generator load rejection, throttle valve, and turbine load control. Total load test is implemented before start up.

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Development and Actual Application of Governor Program to Nuclear Steam Turbine (원자력 증기터빈 조속기 프로그램 개발 및 실증 적용)

  • Choi, In-Kyu;Kim, Jong-An;Park, Doo-Yong;Woo, Joo-Hee
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.4
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    • pp.116-122
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    • 2010
  • This paper describes the up-grade of the turbine governor for steam turbine due to its poor operation from long time use. The analog type governor of the unit 1 in Kori nuclear power plant in Korea was removed and the new digital type turbine governor was developed and installed. The procedure for the actual application, site adaptability test using dynamic simulator and the result of actual operation are described here. And the program for nuclear steam turbine is suggested here.

Study on Optimization of Throttle Margin in High Pressure Turbine of Nuclear Power Plant (원자력 발전소 고압터빈의 교축여유(Throttle Margin) 최적화 연구)

  • Ko, W.S.
    • Journal of the Korea Society For Power System Engineering
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    • v.14 no.4
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    • pp.43-49
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    • 2010
  • In the present study, optimization of throttle margin for high pressure turbine to be retrofitted or partially modified for power uprating or life extension in nuclear power plant, has been performed to increase the electrical output. Throttle margin for high pressure turbine is required to maintain all the time the rated power by opening more of governor valves whenever inlet pressure is decreased due to the tube plugging of steam generator. If throttle margin of high pressure turbine is too much compared to remaining lifetime, loss of electrical output due to pressure drop of governor valves is inevitable. On the contrary, if it is too little, the rated power operation can not be accomplished when inlet pressure of high pressure turbine is dropped after many years operation. So, throttle margin for high pressure turbine in nuclear power plant is compromised considering for the degradation of steam generator, governor valve capacity, manufacturing tolerance of high pressure turbine, future plan of power uprating, and remaining lifetime of power plant.

Selection of Operating Parameters and Management of Operation Console for Protection and Control of Steam Turbine in a Korea Standard Type Nuclear Power Plant (한국 표준형 원자력 발전소 증기터빈 보호 및 제어를 위한 운전인자 선정과 운전반 운영)

  • Choi, In-Kyu;Kim, Jong-An;Woo, Joo-Hee;Shin, Man-Su
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.4
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    • pp.71-78
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    • 2011
  • This paper contains the selection of operation parameters for protection and control of steam turbine in a Korea Standard Type Nuclear Power Plant. The safety of nuclear reactor must be ensured which generates nuclear energy and produces steam. Also, the safety of turbine, which consume the nuclear energy as a core machine, must be ensured. For the purpose of this, we describe how the operating parameters were selected, reviewed, implemented into the operator console and finally put into actual operation of the system.

A simulation test of lone rejection for steam turbine generator in nuclear power plant (원자력발전소 증기터빈 발전기의 부하차단 모의시험)

  • Choi, In-Kyu;Jeong, Tae-Woon;Lee, Ki-Seong
    • Proceedings of the KIEE Conference
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    • pp.2301-2303
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    • 2003
  • A steam turnine in thermal/nuclear power plant drives generator and maintains it at rated speed using high temperature and high pressure steam energy. After synchronization in parallel with the power system, generator output increases according as the governor, that is the controller, increases steam flow into turbine. By the way, as the steam flow into turbine can not be reduced fast even though the electrical load is lost, the turbine gets into dangerous situation due to the increase of its speed. At this time, the duty of the turbine governor is to limit the speed to its overspeed trip setpoint by stopping the steam flow as soon as possible, the test of which is called load rejection test. It is introduced in this paper for a simulation test of generator load rejection to be implemented on the turbine governor in a 600MW nuclear power plant before its startup.

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Web-Based On-Line Thermal Performance Analysis System for Turbine Cycle of Nuclear Power Plant (온라인 웹기반 원전 터빈 사이클 열성능 분석 시스템)

  • Choi KiSang;Choi KwangHee;Ji MoonHak;Hong SeungYeol;Kim SeongKun
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.29 no.3
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    • pp.409-416
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    • 2005
  • We need to develop a on-line thermal performance analysis system for nuclear power plant to determine performance status and heat rate of turbine cycle. We have developed PERUPS(PERformance Upgrade System) to aid the effective performance analysis of turbine cycle. Procedures of performance calculation are improved using several adaptations from standard calculation algorithms based on PTC(Performance Test Code). Robustness in the on-line performance analysis is increased by verification & validation scheme for measured input data. The system also provides useful web interfaces for performance analysis such as graphic heat balance of turbine cycle and components, turbine expansion lines, automatic generation of analysis report. The system was successfully applied for YongGwang nuclear plant unit #3,4.