Temperature Measurement Applications in Power Plants

2009 ◽  
Author(s):  
Ravi Jethra
Keyword(s):  
Power Plant ◽  
Temperature Measurement ◽  
Power Plants ◽  
New Technologies ◽  
Measurement Information ◽  
Safety Integrity Level ◽  
Safety And Reliability ◽  
Technical Advances ◽  
Incorrect Measurement ◽  
Major Equipment

Temperature is one of the most widely measured parameters in a power plant. Temperature is monitored and also used for control in some areas. The paper covers some of the basics of Temperature measurement, and leads into some of the technical advances that impart higher a degree of safety and reliability to power plant operation. These advances are based on some of the latest and innovative technologies that are being implemented in process instrumentation. Irrespective of the type of power plant (coal-fired, Oil or gas based), temperature measurement remains high on the list for operational excellence throughout the plant. Implementation of some of the new technologies results in improved Safety and lower installation and maintenance costs. Incorrect measurement information due to temperature effects, non linearity or stability can result in major equipment getting damaged. Ensuring instruments that have minimal downtime from a maintenance standpoint, not just devices that have been evaluated to provide Safety Integrity Level service in Safety Instrumented Systems, is crucial for daily operations in a power plant.

Supervisory Information System Application in Power Plant

2013 ◽  
Vol 712-715 ◽  
pp. 2644-2647
Author(s):  
Xiao Ling Luo ◽  
Qi Dui Liang
Keyword(s):  
Information System ◽  
Power Plant ◽  
Network Architecture ◽  
Power Plants ◽  
New Technologies ◽  
Engineering Application ◽  
Development Trend ◽  
Correct Selection ◽  
Design Standards ◽  
Large Power

With the advent of new technologies the development of SIS (supervisory information system) is expanding by leaps and bounds, and SIS function discussion gradually in-depth with a batch of large power plants are put into operation. The establishment of SIS can provide a lot of advantages in terms of control, data viewing and management. Along with the advantages, the correct selection of the proper scheme from wide variety of SIS designs and standards represents an important issue. For the reason the function of the SIS, network architecture and the design are discussed, according to application examples and some related SIS design standards and principles. In addition, the paper puts forwards SIS function development trend and gives a brief description of database according to the cases from power plants. The goal of the paper is to make power system flexible, reliable and minimize management cost. The paper provides some references for research and engineering application of a power plant SIS construction in future.

Hitachi-GE Advanced Construction Management Technologies

2008 ◽  
Author(s):  
Kimiharu Onda ◽  
Masatoshi Takada ◽  
Hisako Okada ◽  
Kazuto Tatehora
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Construction Management ◽  
Nuclear Power ◽  
New Technologies ◽  
Personal Digital Assistant ◽  
Safety And Reliability ◽  
Planning Function ◽  
Under Construction ◽  
A Site

Hitachi has so far developed the construction management system with information technology since more than twenty years ago. As the recent results, we developed the advanced new functions and applied them to the Nuclear Power Plant (NPP)’s under construction. RFID-applied construction management method with personal digital assistant (PDA) could realize more reliable and efficient construction control on a site. By enhancing an Integrated Schedule Planning function, the construction scheme could be more accurately and speedily developed, which made it possible to realize the standardization of schedule planning, the linkage with other systems, and the improvement of operability. By applying these new technologies to Hitachi construction management, Hitachi can supply the nuclear power plant with higher quality, safety, and reliability.

scholarly journals Design and implementation of furnace temperature measurement system for power plant coal-fired boiler in acoustic method

2018 ◽  
Vol 232 ◽  
pp. 04031
Author(s):  
Feng Tian ◽  
Hongguang Zhang ◽  
Yan Tian
Keyword(s):  
Power Plant ◽  
Temperature Measurement ◽  
Measurement System ◽  
Power Plants ◽  
Operating Parameter ◽  
Acoustic Method ◽  
Sound Waves ◽  
Monitoring And Control ◽  
Furnace Temperature ◽  
Temperature Measurement System

The furnace temperature of coal-fired boilers in power plants is an important operating parameter for boiler flame monitoring and control, which directly affects the combustion efficiency and the safety of boilers. Based on the research status at home and abroad and the previous research foundation, this paper studies and designs the temperature measurement system of acoustics method. The principle of temperature measurement by sound method is discussed in this paper, and the generalized cross correlation (GCC) method for measuring flight time of sound waves is introduced. The software and hardware of the temperature measurement system are designed in detail. The experiment is carried out according to the measured data of power plant and the results show that the system can measure the average temperature of acoustic paths in the furnace. The feasibility of the system is verified. And this study provides a basis for the reconstruction of furnace temperature field.

scholarly journals Evaluation of components of an excess fuel flow in the heat power equipment

2020 ◽  
pp. 109-122
Author(s):  
Alexander Dvortsevoy ◽  
◽  
Oksana Grigorieva ◽  
Ilya Tikhonov ◽  
◽  
...  
Keyword(s):  
Power Plant ◽  
Technological Process ◽  
Data Storage ◽  
Power Plants ◽  
New Technologies ◽  
Thermal Power ◽  
Cost Effective ◽  
Equipment Part ◽  
Measuring Device ◽  
Technological Processes

The use of traditional information systems with a low level of automation at thermal power plants does not allow organizing a channel for remote collection of reliable information about the current state of technological processes. The inability to organize data transfer to the central node for subsequent storage and processing does not allow tracking in full measure the need to repair or upgrade the equipment. In these conditions, an increase in the efficiency of the power plant is either impossible or relatively small. A significant increase in efficiency indicators can be reached by determining the least cost-effective elements or areas of the technological process, which becomes possible when using a complex collection of data from metering devices and their analysis. In the presence of a digital communication channel, data from the primary measuring device of technological processes (flow rate, pressure, temperature, voltage, etc.) can be transferred to a single information and analytical center. Based on the accumulated data, using a digital twin of the enterprise, real technical and economic indicators, as well as harmful emissions are calculated. Predictive calculations are performed for the cost effective operation of equipment and the introduction of new technologies. With a sufficient number of measurement devices, data storage makes it possible to analyze both the condition of the equipment and the state of the process at various points of time without having to affect the operating equipment. Part of informational functions of industrial control systems performed locally at TPPs can be executed remotely. These include such functions as recording events, information-computational and analytical functions, archiving information, and logging information (reporting).Analyzing the data on the technological process for a certain period (month, quarter, year, etc.), we can evaluate the efficiency of the implemented equipment and speak about the feasibility and ways of further modernization of the thermal power plant.

scholarly journals Arguments for tightness testing of nuclear system pipeline parts, attached to pressureless tanks

2019 ◽  
Vol 124 ◽  
pp. 05076
Author(s):  
A.I. Ivanov ◽  
A.S. Kritchenkov ◽  
M Yu Egorov
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Power Plants ◽  
Storage System ◽  
Liquid Radioactive Waste ◽  
Nuclear Systems ◽  
Safety And Reliability ◽  
Nuclear Power Installations ◽  
Equipment And Pipelines

Actual standard, namely Rules for design and safe operation of equipment and pipelines of nuclear power installations (2015) does not regulate strength and tightness testing of pipeline parts, located between valves and pressureless tanks of nuclear systems at nuclear power plants. This paper introduces arguments for strength and tightness test conduction of such areas of nuclear power plant pipelines, designed in accordance with Russian standards. It was also proposed some amendments for the norm aimed to improve safety and reliability of nuclear power plant systems with radioactive contamination. It was suggested to apply the result of current study to Leningradskaya-2 in order to improve safety and decrease the number of failures of the liquid radioactive waste storage system.

scholarly journals Probabilistic Flood Assessment Methodology for Nuclear Power Plants Considering Extreme Rainfall

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2600
Author(s):  
Beom-Jin Kim ◽  
Minkyu Kim ◽  
Daegi Hahm ◽  
Junhee Park ◽  
Kun Yeun Han
Keyword(s):  
Risk Assessment ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Probability Distribution ◽  
Nuclear Power ◽  
Power Plants ◽  
Fragility Curves ◽  
Flood Analysis ◽  
Major Equipment ◽  
Distribution Type

Abnormal weather conditions due to climate change are currently increasing on both global and local scales. It is therefore important to ensure the safety of the areas where major national facilities are located by analyzing risk quantitatively and re-evaluating the existing major facilities, such as nuclear power plants, considering the load and capacity of extreme flood conditions. In this study, a risk analysis method is developed that combines flood hazard curves with fragility curves using hydraulic and hydrological models by GIS tools and the @RISK model for the probabilistic flood analysis of nuclear power plant sites. A two-dimensional (2D) analysis is first carried out to estimate flood depths in various watershed scenarios, and a representative hazard curve for both external and internal flooding is made by applying a verified probability distribution type for the flood watersheds. For the analysis of flooding within buildings, an internal grid is constructed using GIS with related design drawings, and based on the flood depth results of the 2D analysis, a hazard curve for the representative internal inundation using a verified probability distribution type is presented. In the present study, walkdowns with nuclear experts are conducted around the nuclear power plant area to evaluate the fragile structures and facilities under possible flooding. After reviewing the 2D inundation analysis results based on the selected major equipment and facilities, the zones requiring risk assessment are re-assigned. A fragility curve applying probability distribution for the site’s major equipment and facilities is also presented. Failure risk analysis of the major facilities is then conducted by combining the proposed hazard and fragility curves. Results in the form of quantitative values are obtained, and the indicators for risks as well as the reliability and optimal measures to support decision-making are also presented. Through this study, it is confirmed that risk assessment based on the proposed probabilistic flood analysis technique is possible for flood events occurring at nuclear power plant sites.

Fuzzy multi-objective decision making approach for nuclear power plant installation

2020 ◽  
Vol 39 (5) ◽  
pp. 6339-6350
Author(s):  
Esra Çakır ◽  
Ziya Ulukan
Keyword(s):  
Linear Programming ◽  
Power Plant ◽  
Nuclear Power Plant ◽  
Energy Supply ◽  
Energy Demand ◽  
Nuclear Power ◽  
Power Plants ◽  
Total Duration ◽  
Objective Functions ◽  
Multi Objective

Due to the increase in energy demand, many countries suffer from energy poverty because of insufficient and expensive energy supply. Plans to use alternative power like nuclear power for electricity generation are being revived among developing countries. Decisions for installation of power plants need to be based on careful assessment of future energy supply and demand, economic and financial implications and requirements for technology transfer. Since the problem involves many vague parameters, a fuzzy model should be an appropriate approach for dealing with this problem. This study develops a Fuzzy Multi-Objective Linear Programming (FMOLP) model for solving the nuclear power plant installation problem in fuzzy environment. FMOLP approach is recommended for cases where the objective functions are imprecise and can only be stated within a certain threshold level. The proposed model attempts to minimize total duration time, total cost and maximize the total crash time of the installation project. By using FMOLP, the weighted additive technique can also be applied in order to transform the model into Fuzzy Multiple Weighted-Objective Linear Programming (FMWOLP) to control the objective values such that all decision makers target on each criterion can be met. The optimum solution with the achievement level for both of the models (FMOLP and FMWOLP) are compared with each other. FMWOLP results in better performance as the overall degree of satisfaction depends on the weight given to the objective functions. A numerical example demonstrates the feasibility of applying the proposed models to nuclear power plant installation problem.

Human reliability in non-destructive inspections of nuclear power plant components: modeling and analysis

2019 ◽  
Vol 7 (2B) ◽  
Author(s):  
Vanderley Vasconcelos ◽  
Wellington Antonio Soares ◽  
Raissa Oliveira Marques ◽  
Silvério Ferreira Silva Jr ◽  
Amanda Laureano Raso
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Human Factors ◽  
Nuclear Power ◽  
Power Plants ◽  
Failure Modes ◽  
Cooling System ◽  
Human Reliability ◽  
Non Destructive ◽  
Plant Components

Non-destructive inspection (NDI) is one of the key elements in ensuring quality of engineering systems and their safe use. This inspection is a very complex task, during which the inspectors have to rely on their sensory, perceptual, cognitive, and motor skills. It requires high vigilance once it is often carried out on large components, over a long period of time, and in hostile environments and restriction of workplace. A successful NDI requires careful planning, choice of appropriate NDI methods and inspection procedures, as well as qualified and trained inspection personnel. A failure of NDI to detect critical defects in safety-related components of nuclear power plants, for instance, may lead to catastrophic consequences for workers, public and environment. Therefore, ensuring that NDI is reliable and capable of detecting all critical defects is of utmost importance. Despite increased use of automation in NDI, human inspectors, and thus human factors, still play an important role in NDI reliability. Human reliability is the probability of humans conducting specific tasks with satisfactory performance. Many techniques are suitable for modeling and analyzing human reliability in NDI of nuclear power plant components, such as FMEA (Failure Modes and Effects Analysis) and THERP (Technique for Human Error Rate Prediction). An example by using qualitative and quantitative assessesments with these two techniques to improve typical NDI of pipe segments of a core cooling system of a nuclear power plant, through acting on human factors issues, is presented.

Nonlinear Trend Analysis of Mill Fan System Vibrations for Predictive Maintenance and Diagnostics

2012 ◽  
Vol 58 (4) ◽  
pp. 351-356
Author(s):  
Mincho B. Hadjiski ◽  
Lyubka A. Doukovska ◽  
Stefan L. Kojnov
Keyword(s):  
Power Plant ◽  
Trend Analysis ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Balkan Peninsula ◽  
Predictive Maintenance ◽  
Nonlinear Trend ◽  
The Subject ◽  
The Given

Abstract Present paper considers nonlinear trend analysis for diagnostics and predictive maintenance. The subject is a device from Maritsa East 2 thermal power plant a mill fan. The choice of the given power plant is not occasional. This is the largest thermal power plant on the Balkan Peninsula. Mill fans are main part of the fuel preparation in the coal fired power plants. The possibility to predict eventual damages or wear out without switching off the device is significant for providing faultless and reliable work avoiding the losses caused by planned maintenance. This paper addresses the needs of the Maritsa East 2 Complex aiming to improve the ecological parameters of the electro energy production process.

Features of antibodies against benzo[a]pyrene formation in workers of coal mines and thermal power plants

2019 ◽  
pp. 9-14
Author(s):  
Ye. G. Polenok ◽  
S. A. Mun ◽  
L. A. Gordeeva ◽  
A. A. Glushkov ◽  
M. V. Kostyanko ◽  
...  
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Reference Group ◽  
Coal Dust ◽  
Thermal Power ◽  
Coal Mines ◽  
Serum Levels ◽  
Thermal Power Plants ◽  
Immune Reactions

Introduction.Coal dust and coal fi ring products contain large amounts of carcinogenic chemicals (specifically benz[a]pyrene) that are different in influence on workers of coal mines and thermal power plants. Specific immune reactions to benz[a]pyrene therefore in these categories of workers can have specific features.Objective.To reveal features of antibodies specifi c to benz[a]pyrene formation in workers of coal mines and thermal power plants.Materials and methods.The study covered A and G class antibodies against benz[a]pyrene (IgA-Bp and IgG-Bp) in serum of 705 males: 213 donors of Kemerovo blood transfusion center (group 1, reference); 293 miners(group 2) and 199 thermal power plant workers (group 3). Benz[a]pyrene conjugate with bovine serum albumin as an adsorbed antigen was subjected to immune-enzyme assay.Results.IgA-Bp levels in the miners (Me = 2.7) did not differ from those in the reference group (Me = 2.9), but in the thermal power plant workers (Me = 3.7) were reliably higher than those in healthy men and in the miners (p<0.0001). Levels of IgG-Bp in the miners (Me = 5.0) appeared to be lower than those in the reference group (Me = 6.4; (p = 0.05). IgG-Bb level in the thermal power plantworkers (Me = 7.4) exceeded the parameters in the healthy donors and the miners (p<0.0001). Non-industrial factors (age and smoking) appeared tohave no influence on specific immune reactions against benz[a]pyrene in the miners and the thermal power plant workers.Conclusions.Specific immune reactions against benz[a]pyrene in the miners and the thermal power plant workers are characterized by peculiarities: the miners demonstrate lower levels of class A serum antibodies to benz[a]pyrene; the thermal power plant workers present increased serum levels of class G antibodies to benz[a]pyrene. These peculiarities result from only the occupational features, but do not depend on such factors as age, smoking and length of service at hazardous production. It is expedient to study specific immune reactions to benz[a]pyrene in workers of coal mines and thermal power plants, to evaluate individual oncologic risk and if malignancies occur.

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