Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition最新文献_第5页

Advanced Signal Processing Techniques for Guided Wave Corrosion Monitoring System in Secondary Circuits of Nuclear Power Plants 核电站二次回路导波腐蚀监测系统的先进信号处理技术

Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84024

A. Gribok, V. Agarwal

{"title":"Advanced Signal Processing Techniques for Guided Wave Corrosion Monitoring System in Secondary Circuits of Nuclear Power Plants","authors":"A. Gribok, V. Agarwal","doi":"10.1115/PVP2018-84024","DOIUrl":"https://doi.org/10.1115/PVP2018-84024","url":null,"abstract":"This paper describes the application of independent component analysis (ICA) to detect corrosion-induced defects in commercial nuclear power plants. This paper analyzes the applicability and benefits of ICA when applied to guided wave (GW) technology to detect corrosion in secondary circuits, as well as studying the potential for expanding the range of GW technology to include complex geometries and piping components. The ultrasonic GWs can inspect long stretches of straight piping; however, more complex geometries that include elbows, welds, and tees are causing spurious reflections and coherent noise, which significantly decreases the sensitivity of the GW systems. The potential of ICA to improve detection sensitivity is analyzed and practical recommendations are provided. It is demonstrated on GW data collected at one of the commercial nuclear power plants that ICA, under certain conditions, is capable of separating different coherent noise components and has potential for improving signal-to-noise ratio.","PeriodicalId":275459,"journal":{"name":"Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition","volume":"77 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133602140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Plastic Collapse Evaluation of Fuel Channel Assembly in Pressurized Heavy Water Reactor 重水堆燃料通道组件塑性破坏评价

Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84463

J. Choi, Seok-Jun Kang, J. Choi

{"title":"Plastic Collapse Evaluation of Fuel Channel Assembly in Pressurized Heavy Water Reactor","authors":"J. Choi, Seok-Jun Kang, J. Choi","doi":"10.1115/PVP2018-84463","DOIUrl":"https://doi.org/10.1115/PVP2018-84463","url":null,"abstract":"400 fuel channel assemblies are there in a PHWR. Each assembly consist of a CT as outer tube, a PT as inner tube, and 4 GSs to prevent contact between two tubes. The fuel bundles, inserted into PT of fuel channel assembly, heat the coolant to high temperature by nuclear fission. Furthermore, the pressurizer compresses the coolant not to boil in high temperature. From this, high pressure and high temperature condition happened in the PT. So, the integrity of PTs needs to be guaranteed. Although large number of previous researches were performed, they assumed a PT as single tube and did not take into account the constrained effect. In actual behavior, PT contact with CT, GS or both. In addition, its structural shape made bending restraint effect to the PT. Since the contact force and bending restraint effect make limit in behavior of the PT, previous evaluation results are not accurate. In order to obtain more accurate result, it is needed for the PT to be modeled as fuel channel assembly including CT and GSs. For this, 3D FE model of fuel channel assembly is proposed and validated by comparing with previous creep analysis result in previous study. In this study, fracture mechanical FE analysis is conducted for the PHWR fuel channel with circumferential surface or through-wall crack at the PT. Parameters of PIP geometry and bending restraint effect which can apply to plastic collapse evaluation of the PHWR fuel channels are extracted.","PeriodicalId":275459,"journal":{"name":"Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123831416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Phased Array Ultrasonic Inner Inspection for the Butt Weld on the Head of High-Pressure Vessel 高压容器封头对接焊缝的相控阵超声内部检测

Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84504

Miao Cunjian, Qi He, Du Xingji, Guo Weican, Z. Ling, Huiting Xu

{"title":"The Phased Array Ultrasonic Inner Inspection for the Butt Weld on the Head of High-Pressure Vessel","authors":"Miao Cunjian, Qi He, Du Xingji, Guo Weican, Z. Ling, Huiting Xu","doi":"10.1115/PVP2018-84504","DOIUrl":"https://doi.org/10.1115/PVP2018-84504","url":null,"abstract":"The layered high-pressure hydrogen vessels are widely used in hydrogen refueling stations. The head of the high-pressure vessel is made of austenitic stainless steel, and has thick walls, a pipe with a small diameter on the top and a butt-weld structure. It’s difficult to detect effectively, using conventional methods in the inspection of the butt weld on the head. To effectively detect the weld joint, a detecting method was investigated using ultrasonic phased array technique from the inner surface of the small-diameter pipe. By axial focusing and circumferential focusing, the ultrasonic field in austenitic stainless steel could satisfy the specific inspection requirement. Some ultrasonic field analysis and defect detection simulations were carried out with CIVA, for artificial defects such as side-drilled holes. Meanwhile, the test specimen and probe were designed and manufactured, and experiments were conducted. Furthermore, the feasibility and rationality of the detecting method and the simulation method were verified, and the detecting process parameters were determined.","PeriodicalId":275459,"journal":{"name":"Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122574386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Spherical Indentation Approach for Fracture Toughness Evaluation: A Study Based on the Energy Release Rate 基于能量释放率的球面压痕断裂韧性评价方法研究

Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition Pub Date : 2018-07-15 DOI: 10.1115/PVP2018-84435

Tairui Zhang, Wei Qiang Wang, Aiju Li

{"title":"The Spherical Indentation Approach for Fracture Toughness Evaluation: A Study Based on the Energy Release Rate","authors":"Tairui Zhang, Wei Qiang Wang, Aiju Li","doi":"10.1115/PVP2018-84435","DOIUrl":"https://doi.org/10.1115/PVP2018-84435","url":null,"abstract":"In this study, we investigated the drawbacks of previous studies regarding the evaluation of fracture toughness from spherical indentation tests (SITs). This was achieved by an examination of the material damage mechanism during indentation tests, uniaxial tensile tests, and Mode I/II fracture tests. A new approach based on the energy release rate was proposed in this study to evaluate the fracture toughness of ductile metals. Scanning electron microscope (SEM) observations revealed that the mechanism for material damage during an indentation test was different with the material damage in uniaxial tensile tests and Mode I fracture tests, but similar to that in Mode II fracture tests. Thus, the energy release rate during SITs should be correlated with JIIC. Compared with previous studies, this new proposed method was more consistent with the actual damage mechanism and did not rely on the specific critical damage values. Experiments on SA508, SA533, 15CrMoR, and S30408 revealed that the maximum error from this energy release rate-based approach was no more than 13% when compared with their conventional counterparts (compact tension tests), and thus can meet the precision requirement of engineering applications.","PeriodicalId":275459,"journal":{"name":"Volume 5: High-Pressure Technology; ASME Nondestructive Evaluation, Diagnosis and Prognosis Division (NDPD); Rudy Scavuzzo Student Paper Symposium and 26th Annual Student Paper Competition","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125395882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1