On-Line Monitoring and Diagnostics of the Integrity of Nuclear Plant Steam Generators and Heat Exchangers, Volumes 1, 2

Upadhyaya, B.R.; Hines, J. Wesley; Lu, Baofu; Huang, Xuedong; L., Penha, Rosani,; Perillo, S. R. P.; Zhao, Ke

doi:10.2172/843182

Cited by 6 publications

(6 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These methods require a centralized approach to data analysis, rather than the probe-based method. Examples of the methods can be found in Upadhyaya et al 2005. Due to the large number of instruments, the approach of inspection can move from on-the-spot measurement and decision making by a human to a robot's acquiring the data and transferring it to a centralized location for data analysis and baseline establishment. Examples of the technologies developed mainly for steam generators in the nuclear power industry can be found in Obrutsky et al 2009. UGWs were successfully applied to monitor corrosion degradation in low-pressure feedwater heaters (Puchot 2013).…”

Section: Modern Statementioning

confidence: 99%

Development of a Technology Roadmap for Online Monitoring of Nuclear Power Plants

Rashdan

Smith

Germain

et al. 2018

View full text Add to dashboard Cite

The nuclear power industry has recently recognized the potential cost savings that can be achieved from migrating the current manual and labor-intensive surveillance and preventive maintenance activities to data-driven online monitoring methods. Consequently, several efforts have been launched with various degrees of momentum to tackle specific surveillance or preventive maintenance activities. The U.S. Department of Energy's Light Water Reactor Sustainability (LWRS) program has anticipated this need and launched an effort aimed to develop a technology roadmap for the nuclear power industry. A holistic technology roadmap will reduce long-term investment costs by prioritizing improvements that support the end-state vision rather than just the next incremental capability. Because a comprehensive roadmap has to be focused towards the plant's needs, and because nuclear power plants (NPPs) have different process efficiencies and deficiencies, the extent of details described by this technology roadmap was optimized to be plant-independent. The roadmap, therefore, is developed to describe processes and equipment, regardless of an NPP's specific need to target a certain process or equipment sequence. For example, the steps required to migrate the inspection of a pump are plant independent. However, defining that the migration of feed water pump inspections to online monitoring should be performed before inspections of feed water valves is dependent on multiple plant factors such as the plant requirements, labor work capacity, and process or equipment conditions.The technology roadmap was broken down into six elements, four of which have a sequential path of advancement, while the other two are supporting elements to the sequential elements. The sequential part of the roadmap consists of data collection, analytics, visualization, and management. For these elements of the technology roadmap, the adoption of the technology to perform an activity is defined by the availability and usage of the technology in one of three states. The base state is defined as the most primitive, manual, and/or labor-dependent process used by some NPPs. The modern state is defined as the state that can be achieved if the activities are augmented or replaced by current technologies that are either commercially available or soon to be available. The state of the art is defined as technologies of the future (i.e., concepts and technologies that are being researched).The data collection element of the technology roadmap is described in terms of a process. However, the data analytics element is described in terms of equipment, because automating an activity performed on one piece of equipment requires considering multiple data sources from various data collection processes. The visualization and data management elements are process and equipment independent. Visualization describes the effective use of human factors science and technological advancements to present the collected data and data analytics results. Data management targets storage, commun...

show abstract

Section: Modern Statementioning

confidence: 99%

Development of a Technology Roadmap for Online Monitoring of Nuclear Power Plants

Rashdan

Smith

Germain

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Report [118], using the energy ratio method and DWT analysis. There are several other studies focused on flaw detection for plate-like structure.…”

Section: Flaw Detection and Localization Using Hhtmentioning

confidence: 99%

On-Line Monitoring and Diagnostics of the Integrity of Nuclear Plant Steam Generators and Heat Exchangers

Upadhyaya¹,

Hines²

2004

View full text Add to dashboard Cite

show abstract

“…For the UTSG, a good physics model was developed in Phase II [200]. We used this SIMULINK model to generate both normal data and the data with the presence of fouling, which is assumed to progress with time as given in Figures 4.1 and 4.2.…”

Section: Data Generationmentioning

confidence: 99%

On-Line Monitoring and Diagnostics of the Integrity of Nuclear Plant Steam Generators and Heat Exchangers.

Upadhyaya¹,

Hines²

2004

View full text Add to dashboard Cite

The overall purpose of this Nuclear Engineering Education Research (NEER) project was to integrate new, innovative, and existing technologies to develop a fault diagnostics and characterization system for nuclear plant steam generators (SG) and heat exchangers (HX).Issues related to system level degradation of SG and HX tubing, including tube fouling, performance under reduced heat transfer area, and the damage caused by stress corrosion cracking, are the important factors that influence overall plant operation, maintenance, and • Development and testing of a high-fidelity nodal model of a U-tube steam generator (UTSG) to simulate the effects of fouling and to generate a database representing normal and degraded process conditions. Application of the group method of data handling (GMDH) method for process variable prediction.• Development of a laboratory test module to simulate particulate fouling of HX tubes and its effect on overall thermal resistance. Application of the GMDH technique to predict HX fluid temperatures, and to compare with the calculated thermal resistance.• Development of a hybrid modeling technique for process diagnosis and its evaluation using laboratory heat exchanger test data.• Development and testing of a sensor suite using piezo-electric devices for monitoring structural integrity of both flat plates (beams) and tubing. Experiments were performed in air, and in water with and without bubbly flow. 2• Development of advanced signal processing methods using wavelet transforms and image processing techniques for isolating flaw types.• Development and implementation of a new nonlinear and non-stationary signal processing method, called the Hilbert-Huang transform (HHT), for flaw detection and location. This is a more robust and adaptive approach compared to the wavelet transform.• Implementation of a moving-window technique in the time domain for detecting and quantifying flaw types in tubular structures. A window zooming technique was also developed for flaw location in tubes.• Theoretical study of elastic wave propagation (longitudinal and shear waves) in metallic flat plates and tubing with and without flaws.• Simulation of the Lamb wave propagation using the finite-element code ABAQUS.This enabled the verification of the experimental results.The research tasks included both analytical research and experimental studies. The experimental results helped to enhance the robustness of fault monitoring methods and to provide a systematic verification of the analytical results. The results of this research were disseminated in scientific meetings. A journal manuscript was submitted for publication.The new findings of this research have potential applications in aerospace and civil structures. The report contains a complete bibliography that was developed during the course of the project.3

show abstract

On-Line Monitoring and Diagnostics of the Integrity of Nuclear Plant Steam Generators and Heat Exchangers, Volumes 1, 2

Abstract: Nontrivial solutions exist only if the determinant of matrix C equals zero. Complex solutions of the determinant matrix are the wave numbers of the Lamb wave propagating along the plate.

Cited by 6 publications

References 11 publications

Development of a Technology Roadmap for Online Monitoring of Nuclear Power Plants

Development of a Technology Roadmap for Online Monitoring of Nuclear Power Plants

On-Line Monitoring and Diagnostics of the Integrity of Nuclear Plant Steam Generators and Heat Exchangers

On-Line Monitoring and Diagnostics of the Integrity of Nuclear Plant Steam Generators and Heat Exchangers.

Contact Info

Product

Resources

About