Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components最新文献_第5页

Manufacturing Technology of Thick-Walled Integrated Cylinder With Large-Sized Side Nozzles for Nuclear Pressure Vessel 核压力容器用大尺寸侧喷嘴厚壁集成筒体制造技术

Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components Pub Date : 2022-08-08 DOI: 10.1115/icone29-92302

S. Li

{"title":"Manufacturing Technology of Thick-Walled Integrated Cylinder With Large-Sized Side Nozzles for Nuclear Pressure Vessel","authors":"S. Li","doi":"10.1115/icone29-92302","DOIUrl":"https://doi.org/10.1115/icone29-92302","url":null,"abstract":"\u0000 This paper introduces a manufacturing technology of thick-walled integrated cylinder with large-sized side nozzles for nuclear reactor pressure vessel. This forging integrates the inlet nozzle and the outlet nozzle on the nozzle shell with integral flange to form an integrated forging. China First Heavy Industry (CFHI) has successfully realized the manufacturing process of this forging. During the forming stage of the forging, with the help of numerical simulation method, the size of the forging blank is reduced to the greatest extent, and a thick-walled cylinder with a convex structure is designed and forged, and then the punching guide hole is machined at the convex structure of the cylinder, which plays the role of positioning and guiding in the forging process of the side nozzle. We use special-structured forging aids to transfer the load of the forging press to the punch to complete the hot extrusion of the side nozzles, and finally realize the integrated near-net shape of the forging. The forging flow line of the forging is preserved to the greatest extent, and the best forging effect of each part of the forging is guaranteed. After the final heat treatment process of the forging, all parts of the forging obtained excellent mechanical properties.","PeriodicalId":317622,"journal":{"name":"Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components","volume":"298 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123322479","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

Optimizing Material/Component Fabrication Processing for Improving Service Performance in Nuclear Power Plant Coolants 优化材料/部件制造工艺，提高核电厂冷却剂的使用性能

Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components Pub Date : 2022-08-08 DOI: 10.1115/icone29-92321

Zhanpeng Lu

引用次数: 0

Local Damage to Reinforced Concrete Panels Subjected to Oblique Impact by Projectiles: Numerical Analysis on Test Results 钢筋混凝土板受弹丸斜冲击的局部损伤:试验结果的数值分析

Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components Pub Date : 2022-08-08 DOI: 10.1115/icone29-88884

Zuoyi Kang, Y. Okuda, A. Nishida, H. Tsubota, Yinsheng Li

{"title":"Local Damage to Reinforced Concrete Panels Subjected to Oblique Impact by Projectiles: Numerical Analysis on Test Results","authors":"Zuoyi Kang, Y. Okuda, A. Nishida, H. Tsubota, Yinsheng Li","doi":"10.1115/icone29-88884","DOIUrl":"https://doi.org/10.1115/icone29-88884","url":null,"abstract":"\u0000 This study aims at proposing a numerical analysis method to evaluate local damage to reinforced concrete (RC) panel caused by projectile impact. To validate the proposed numerical analysis method, we recently conducted a series of impact tests with normal and oblique impacts due to rigid and soft projectiles. We intend to compare the numerical results with experimental results including reaction forces, damage modes of RC panel and soft projectile in oblique impact. In the numerical analysis for evaluation of local damage to RC panel, there are several key parameters, such as material properties, contact conditions between concrete and projectile. In addition to these parameters, we also focused on the reaction forces of RC panel, which is important when investigating the impact effects on structure under projectile impact. Since the stiffness of support structure is represented as a spring element in finite element (FE) model, we examined the relationship between the spring stiffness and numerically computed reaction forces in oblique impact. The numerical analysis method for oblique impact is validated, and the local damage in the RC panel is evaluated, by comparing experimental and numerical results.","PeriodicalId":317622,"journal":{"name":"Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128798127","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

Root Cause Analysis of Nonrelevant Indication of Magnetic Particle Test on 18MND5 Steel Welded Joints in the Steam Generator of a Nuclear Power Project 某核电工程蒸汽发生器18MND5钢焊接接头磁粉检测不相关指标的根本原因分析

Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components Pub Date : 2022-08-08 DOI: 10.1115/icone29-92313

Yanbing Guo, Yanhong Lu, Wang Zhang, Miaosen Yang, Xi-yang Liu, Binfeng Lu

{"title":"Root Cause Analysis of Nonrelevant Indication of Magnetic Particle Test on 18MND5 Steel Welded Joints in the Steam Generator of a Nuclear Power Project","authors":"Yanbing Guo, Yanhong Lu, Wang Zhang, Miaosen Yang, Xi-yang Liu, Binfeng Lu","doi":"10.1115/icone29-92313","DOIUrl":"https://doi.org/10.1115/icone29-92313","url":null,"abstract":"\u0000 The 18MND5 steel is rolled and welded by the submerged arc welding process to fabricate the upper cylinder shell of the steam generator of a nuclear power project. After the shell is welded, Heat treatment is performed. Then, magnetic particle test (MT), ultrasonic testing (UT), and radiographic testing (RT) were performed on the longitudinal Joint, and no defects were found. However, there are MT nonrelevant indications characterized continuous linear at the position of the weld fusion line on both sides of the longitudinal Joint. Through the peeling observation of the Product Weld Test Coupon with the same linear indication, no defects were found. It can be determined that continuous linear indications are nonrelevant. Optical microstructure observation (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and electron backscattered diffraction (EBSD) analysis was carried out on the 18MND5 welded joints to determine the cause of MT nonrelevant indication. The result showed that there is a noticeable growth texture in the coarse-grained lath martensite (M) region of the weld with MT nonrelevant indication, which is closely related to the ferrite (F) and parent metal of the weld metal on both sides. The ferrite (growth direction and morphology of the material structure are different. This growth texture leads to a significant difference in magnetic properties at the fusion line position of the welded joint, resulting in a mutation in the magnetic properties of the coarse-grained region, resulting in an uncorrelated MT indication.","PeriodicalId":317622,"journal":{"name":"Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123469136","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

Research on Laser Welding Process and Deformation Control of Irradiated Sample Holder 辐照试样架激光焊接工艺及变形控制研究

Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components Pub Date : 2022-08-08 DOI: 10.1115/icone29-92535

Shouyi Luo, Baochao Guo, Dawei Mi

{"title":"Research on Laser Welding Process and Deformation Control of Irradiated Sample Holder","authors":"Shouyi Luo, Baochao Guo, Dawei Mi","doi":"10.1115/icone29-92535","DOIUrl":"https://doi.org/10.1115/icone29-92535","url":null,"abstract":"\u0000 In order to study the influence of laser welding parameters on the weld formation and the deformation of the irradiated sample holder, laser lap welding tests were carried out on 304 stainless steel sheets with the thicknesses of 8.97mm and 20mm. Firstly, orthogonal tests were carried out to study the effect of welding speed and defocus on weld morphologies. The results showed that when the laser power was 10kW, the welding speed was 15mm/min, and the defocus amount was −1mm, the optimized weld with the aspect ratio of 2.13 can be obtained. Next, a novel fixture designed for the welding of the irradiated sample holder was introduced, which effectively reduced the deformation of workpieces during the welding process. Additionally, in order to compensate the deformation induced by the weld shrinkage and residual stress, a filler gauge of 0.75mm height was used to create an inverse deformation. it was proved that the welding deformation could be effectively controlled after the preforming, and the deformation could be controlled below 0.7mm. Finally, the influence of welding sequence on the deformation of the irradiated sample holder under the optimized welding parameters was investigated. It was shown that the optimal welding sequence of the irradiated sample holder was: firstly the arc positioning welding, then the laser positioning welding, and finally the laser deep penetration welding. The welding deformation can be effectively controlled by adding the fixture and adjusting the welding sequence, the change of flatness before and after the laser deep penetration welding could reach 1.09mm.","PeriodicalId":317622,"journal":{"name":"Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121774696","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

Study on Multi-Objective Optimization Design of LP Section for 1000MW Class Nuclear Turbines 1000MW级核电机组低压段多目标优化设计研究

Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components Pub Date : 2022-08-08 DOI: 10.1115/icone29-91474

Yifeng Hu, Zhiqiang Hu

{"title":"Study on Multi-Objective Optimization Design of LP Section for 1000MW Class Nuclear Turbines","authors":"Yifeng Hu, Zhiqiang Hu","doi":"10.1115/icone29-91474","DOIUrl":"https://doi.org/10.1115/icone29-91474","url":null,"abstract":"\u0000 With the development of nuclear reactors, the domestic market demand for high-capacity nuclear power turbines is also growing. Low pressure (LP) section (include LP inner casing and LP outer casing) is one of the important components of nuclear steam turbine, which are mainly welded by plates and rods. The increasing size of LP section leads more vacuum load, more self-weight, more stress, more deformation and so on. Therefore, the traditional design methods can no longer adapt to this situation very well.\u0000 In this paper, the stress, deformation, buckling behaviors and seismic loadcase of the LP section of steam turbine are evaluated by the numerical finite element analysis. Then, the multi-objective optimization (include size optimization and topology optimization) design of the LP section is done, so that the structural efficiency and performance of LP section is achieved. The performance of all aspects of the optimized LP section has been greatly improved. On the basis of a small improvement in stress and deformation, the self-weight of the LP section is greatly reduced. At the same time, the optimization boundaries, the choice of the model and the process are discussed. This study proposes a more optimized design method of LP section of steam turbines, and it offers considerable economic benefits.","PeriodicalId":317622,"journal":{"name":"Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121892602","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

Investigation on the Inspection Technology of GH3535 Alloy Butt Weld With Linear Array Probe GH3535合金对接焊缝线阵探头检测技术研究

Volume 10: Advanced Methods of Manufacturing for Nuclear Reactors and Components Pub Date : 2021-09-29 DOI: 10.21203/rs.3.rs-915672/v1

Xiaodan Yuan A, Yuan Zhang B, Zhijun Li, Kun Yu C, Jinlong Wang D

引用次数: 0