A Lifecycle Management Program for NPP Turbine Balance of Plant

2009 ◽  
Author(s):  
Toshinari Kawai ◽  
Katsuhiko Yamakami ◽  
Satoshi Hiraoka ◽  
Jun Manabe
Keyword(s):  
Heat Exchangers ◽  
Steam Pressure ◽  
Management Program ◽  
Light Water Reactor ◽  
Residual Lifetime ◽  
Balance Of Plant ◽  
Equipment Supplier ◽  
Main Steam ◽  
Inspection Data ◽  
Lifecycle Management

A lifecycle management program, for turbine balance of plant of light water reactor units, was proposed and implemented from the view point of system and equipment supplier to secure the high availability factor throughout the long intended residual lifetime. The program consists of unit surveillance analyzing operation and inspection data, degradation assessment for the equipment and prospecting for the future by appropriate measures to address the issues over the units based on both technical and economical criteria. The surveillance revealed the issue that the generating power would be adversely affected by main steam pressure reduction due to the scale adhesion to SG tubes. The prospect for the unit future was presented as an alteration of the water treatment to HAVT accompanied with optimum design for the replacement of the auxiliary heat exchangers of MSR and feedwater heaters.

scholarly journals A Lifecycle Management Program for NPP Turbine Balance of Plant

2009 ◽  
Vol 3 (2) ◽  
pp. 333-346
Author(s):  
Jun MANABE ◽  
Katsuhiko YAMAKAMI ◽  
Satoshi HIRAOKA ◽  
Toshinari KAWAI
Keyword(s):  
Management Program ◽  
Balance Of Plant ◽  
Lifecycle Management

Optimization of a Sintering Waste Heat Power Unit

2014 ◽  
Vol 1008-1009 ◽  
pp. 897-900
Author(s):  
Xue Min Gong ◽  
Jiu Lin Yang ◽  
Chen Wang
Keyword(s):  
Power Generation ◽  
Power Unit ◽  
Waste Heat ◽  
Steam Pressure ◽  
Operating Conditions ◽  
Parameters Optimization ◽  
Heat Power ◽  
Optimal Value ◽  
Generation Capacity ◽  
Main Steam

An optimization was performed for a sintering waste heat power unit with all data obtained in the site and under the unit normal operating conditions. The physical and mathematical model for the process of cooling and generation is established, which makes the net power generation as an objective function of the cooling machine imported ventilation, the thickness of sinter and the main steam pressure. Optimizing for single parameter, we found that each parameter had an optimal value for the system. In order to further optimize the system's operating parameters, genetic algorithm was used to make the combinatorial optimization of the three parameters. Optimization results show that power generation capacity per ton is increased by13.10%, and net power generation is increased by 16.17%. The optimization is instructive to the operation of sintering waste heat power unit.

scholarly journals ANALISIS KINERJA TURBIN UAP UNIT 3 BERDASARKAN PERFORMANCE TEST DI UNIT PELAKSANA PT.PLN (PERSERO) PEMBANGKITAN ASAM-ASAM

JTAM ROTARY ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 95
Author(s):  
Kemas Ronand Mahaputra
Keyword(s):  
Performance Test ◽  
Heat Rate ◽  
Steam Pressure ◽  
Outlet Temperature ◽  
Steam Turbines ◽  
Turbine Efficiency ◽  
Rate Calculation ◽  
Temperature And Pressure ◽  
Main Steam ◽  
Unit Unit

This study purpose to determine the performance of steam turbines Unit 3 of PT.PLN (Persero) Pembangkitan Asam-asam by comparing the results of the data obtained by each performance test. This research was carried out by taking data performance tests in 2012, 2017, 2018 and 2019 and then processing the data and obtaining turbine heat rate values and average turbine efficiency then comparing the values obtained in each year. The data taken is obtained from the rendal operation of PT.PLN (Persero) Pembangkitan Asam-asam, data variables taken are load, main steam temperature inlet, main steam pressure inlet, HP heater feed outlet temperature, HP heater outlet pressure, main steam flow. Temperature and pressure obtained are then searched for enthalpy values. The data obtained to calculate the value of the turbine heat rate and turbine efficiency on average per time from each performance test then averages the value of the turbine heat rate and turbine efficiency each time the data collection performance test is then compared with the data each year.The calculation of the turbine heat rate uses the heat & mass balance method by measuring the value of the incoming and outgoing fluid differences and comparing the load obtained, the efficiency of the turbine is obtained by dividing the energy of 1 kW with a turbine heat rate then multiplying by 100%. The average turbine heat rate calculation result for each performance test which is on May 23, 2012 is 2,701, October 27, 2017 is 3,136, September 5, 2018 is 3,005, May 21, 2019 is 3,113. The average turbine efficiency value on May 23, 2012 is 37.02%, October 27 2017 is 31.39%, September 5 2018 is 33.28%, May 21, 2019 is 32.12%. The performance of PT PLN (Persero) Pembangkit Asam-asam Implementing Unit Unit 3 has decreased from 2012 to 2019 which is 4.9%

Case Study of Model-Based Inversion of the Angle Beam Ultrasonic Response From Composite Impact Damage

2018 ◽  
Vol 1 (4) ◽  
Author(s):  
John Wertz ◽  
Laura Homa ◽  
John Welter ◽  
Daniel Sparkman ◽  
John C. Aldrin
Keyword(s):  
Inverse Problem ◽  
Surrogate Model ◽  
Composite Structures ◽  
Impact Damage ◽  
Gaussian Process Regression ◽  
Model Based ◽  
Shadowed Region ◽  
Inspection Data ◽  
Ultrasound Inspection ◽  
Lifecycle Management

The U.S. Air Force seeks to improve lifecycle management of composite structures. Nondestructive characterization of damage is a key input to this framework. One approach to characterization is model-based inversion of ultrasound inspection data; however, the computational expense of simulating the response from damage represents a major hurdle for practicality. A surrogate forward model with greater computational efficiency and sufficient accuracy is, therefore, critical to enable damage characterization via model-based inversion. In this work, a surrogate model based on Gaussian process regression (GPR) is developed on the chirplet decomposition of the simulated quasi-shear scatter from delamination-like features that form a shadowed region within a representative composite layup. The surrogate model is called in the solution of the inverse problem for the position of the hidden delamination, which is achieved with <0.5% error in <20 min on a workstation computer for two unique test cases. These results demonstrate that solving the inverse problem from the ultrasonic response is tractable for composite impact damage with hidden delaminations.

Based on the Principle of Approximate Model Established Model Test Rig Simulation of the Actual Test Bench

2012 ◽  
Vol 614-615 ◽  
pp. 14-19
Author(s):  
Min Xue ◽  
Zhu Ma ◽  
Yan Jun Li ◽  
Long Bin Yang ◽  
Fang Zhu
Keyword(s):  
Wave Phenomenon ◽  
Fluid Dynamic ◽  
Pressure Fluctuations ◽  
Steam Pressure ◽  
Approximate Model ◽  
Two Phase ◽  
Small Model ◽  
Main Steam ◽  
Relationship Of ◽  
Physical Phenomena

For Marine pressurization boiler dynamic system, when the boiler provide steam for air storage, boiler drum pressure and steam pressure will have produced a wave phenomenon; In order to research this a wave phenomenon, considering similar principles , establish the model experiments to simulate the wave process. Due to boiler provide steam for air storage that involves in many complex physical processes, including two phase flow, heat transfer, braising physical phenomena. By a simple analysis, to be completely similar to the model, model must be the same as the real situation; it will lose the small model experimental significance. According to this problem, we consider use approximate modeling method which usually used in engineering, seize the pressure fluctuations of the main contradictions; Put forward in the process of considering only reflect pressure fluctuations of local fluid dynamic field project of similar approximation, Finally we get the fluctuation relationship of the actual conditions and small model experiment of main steam pressure.

Probability of Exceedance (POE) Methodology for Developing Integrity Programs Based on Pipeline Operator-Specific Technical and Economic Factors

2002 ◽  
Author(s):  
Rafael G. Mora ◽  
Curtis Parker ◽  
Patrick H. Vieth ◽  
Burke Delanty
Keyword(s):  
Decision Making ◽  
Probabilistic Models ◽  
Cost Benefit Analysis ◽  
Management Program ◽  
Metal Loss ◽  
Decision Making Process ◽  
Pipeline System ◽  
Probability Of Exceedance ◽  
Integrity Verification ◽  
Inspection Data

With the availability of in-line inspection data, pipeline operators have additional information to develop the technical and economic justification for integrity verification programs (i.e. Fitness-for-Purpose) across an entire pipeline system. The Probability of Exceedance (POE) methodology described herein provides a defensible decision making process for addressing immediate corrosion threats identified through metal loss in-line inspection (ILI) and the use of sub-critical in-line inspection data to develop a long term integrity management program. In addition, this paper describes the process used to develop a Corrosion In-line Inspection POE-based Assessment for one of the systems operated by TransGas Limited (Saskatchewan, Canada). In 2001, TransGas Limited and CC Technologies undertook an integrity verification program of the Loomis to Herbert gas pipeline system to develop an appropriate scope and schedule maintenance activities along this pipeline system. This methodology customizes Probability of Exceedance (POE) results with a deterministic corrosion growth model to determine pipeline specific excavation/repair and re-inspection interval alternatives. Consequently, feature repairs can be scheduled based on severity, operational and financial conditions while maintaining safety as first priority. The merging of deterministic and probabilistic models identified the Loomis to Herbert pipeline system’s worst predicted metal loss depth and the lowest safety factor per each repair/reinspection interval alternative, which when combined with the cost/benefit analysis provided a simplified and safe decision-making process.

Refurbishment of Secondary System and High AVT Water Treatment of Genkai #1 and #2

2008 ◽  
Author(s):  
Jun Manabe ◽  
Yasuhiko Shoda ◽  
Tatsushi Yamamura ◽  
Yuuichirou Kusumoto
Keyword(s):  
Water Treatment ◽  
Heat Exchangers ◽  
Copper Alloy ◽  
Iron Concentration ◽  
Management Program ◽  
Feed Water ◽  
Secondary System ◽  
Blow Down ◽  
Scale Adhesion ◽  
Commercial Operation

Kyushu electric co. Genkai #1 and #2 are twin 500 Mw class first generation PWR power stations starting their commercial operation in 1975–1981. The units were recently altered their secondary water treatment from AVT to HAVT (High All Volatile Treatment) operation aiming to suppress erosion in piping and equipment, resulting in feed water iron concentration reduction to around 1 ppb as indication of the effects. The units had been successfully operated from the start of their commercial operation except for scale adhesion to SG and others, degradation of copper alloy material tubes in auxiliary heat exchangers and lower condenser vacuum derived from protective ferrous sulfate coating. Life cycle management program was implemented resulting in the alteration of water treatment to HAVT adopting the SG blow down demineralizing and the replacement of copper alloy tube heat exchangers to stainless steel and titan tubes. Further more the examination results were introduced, of the scale adhesion mechanism in the high temperature region of the secondary system based on actual plants iron characterization data and field examination results of HAVT of Genkai units, expecting HAVT application would be effective for the scale adhesion reduction.

scholarly journals PFC Performance Improvement of Ultra-supercritical Secondary Reheat Unit

2018 ◽  
Vol 38 ◽  
pp. 01002
Author(s):  
Jun Li ◽  
WeiWei Li ◽  
XingWang Hu ◽  
WenChuan Sun ◽  
Gang Kong
Keyword(s):  
Performance Improvement ◽  
High Efficiency ◽  
System Organization ◽  
Frequency Control ◽  
Steam Pressure ◽  
Feed Water ◽  
Control Capability ◽  
Primary Frequency ◽  
Main Steam ◽  
Primary Frequency Control

Ultra-supercritical secondary reheat unit has been widely used in the world because of its advantages of large capacity, low consumption and high efficiency etc., but rapid load change ability of the turbines to be weakened which caused by its system organization, cannot meet the requirements of power grid frequency modulation. Based on the analysis of the control characteristics of ultra-supercritical once-through reheat unit, the primary frequency control based on feed-water flow overshoot compensation is proposed. The main steam pressure generated by the feed-water is changed to improve the primary frequency control capability. The relevant control strategy has been applied to the 1000MW secondary reheating unit. The results show that the technology is feasible and has high economical efficiency.

scholarly journals Experimental tests of the prototypical micro-cogeneration system with a 100 kW biomass-fired boiler

2018 ◽  
Vol 70 ◽  
pp. 03014
Author(s):  
Krzysztof Sornek ◽  
Wojciech Goryl ◽  
Mariusz Filipowicz
Keyword(s):  
Heat Exchangers ◽  
Thermal Power ◽  
Experimental Tests ◽  
Rankine Cycle ◽  
Steam Pressure ◽  
Steam Engine ◽  
Steam Temperature ◽  
Power Generator ◽  
Cogeneration System ◽  
Shell And Tube

Renewable energy based micro cogeneration systems are an interesting option for domestic, agricultural and commercial sectors. In this paper, a dedicated system with a 100 kWth biomass-fired boiler was proposed. Developed system works according to modified Rankine Cycle operation. Steam generated in two shell and tube heat exchangers is used to power steam engine (connected with power generator) and then flows via condenser to degasifier. During the presented tests, the selected parameters of the boiler, oil circuit and steam/condensate circuit were analyzed. As was shown, the maximum thermal power taken from the oil circuit to evaporate condensate and superheat steam was ~105 kWth (it was ~91% of thermal power generated in the boiler). The value steam pressure varied from 2 to 5 bars during operation of the steam engine. Steam mass flow was then equal to ~105 kg/h, what allowed to generate electric power at a level of ~1.05 kWel. Such a low value resulted e.g. from limitations in the oil temperature, limitations in the steam temperature, steam pressure and steam flow, limitations caused by power generator’s construction, as well as other construction and operating parameters.

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