In-service inspection by nondestructive examination (NDE)

2021 ◽  
pp. 285-331
Author(s):  
Maurice Stewart
Keyword(s):  
Nondestructive Examination ◽  
Service Inspection

scholarly journals STUDY ON IN-SERVICE INSPECTION PROGRAM AND METHOD FOR FUEL HANDLING SYSTEM OF RDE

2021 ◽  
Vol 2 (1) ◽  
pp. 011-015
Author(s):  
Alim Mardhi ◽  
Andryansyah Andryansyah ◽  
Mudi Haryanto ◽  
Topan Setiadipura ◽  
Ari Nugroho
Keyword(s):  
System Structure ◽  
Handling System ◽  
Nondestructive Examination ◽  
Analysis Technique ◽  
Examination Techniques ◽  
Additional Value ◽  
Non Destructive ◽  
Preliminary Program ◽  
Service Inspection

One of the main programs that should be established on the designing process of the fuel handling system is to establish an in-service inspection program for maintaining the integrity of the system, structure and component during service lifetime. The most important role of in-service inspection is the nondestructive examination techniques. The objective of this study is to propose a preliminary program for examining the integrity of the fuel handling system during operation and determining the best method to confirm the defects. The proposed programs are described as follows, defining the operating environment of the fuel handling system, identifying the material characteristics during operation which indicates to promote the defects, and selecting the appropriate method of non-destructive examination and analysis technique for such kind of defects. The proposed in-service inspection program is expected to give significant additional value to the fuel handling system design of RDE.

NDE Assessment of PWSCC in Control Rod Drive Mechanism Housings

2006 ◽  
Author(s):  
Steven R. Doctor ◽  
Stephen E. Cumblidge ◽  
George J. Schuster ◽  
Robert V. Harris ◽  
Susan L. Crawford
Keyword(s):  
Pacific Northwest ◽  
National Laboratory ◽  
Pacific Northwest National Laboratory ◽  
Nuclear Regulatory Commission ◽  
The United States ◽  
Primary Objective ◽  
Control Rod ◽  
Drive Mechanism ◽  
Nondestructive Examination ◽  
Service Inspection

Studies being conducted at the Pacific Northwest National Laboratory (PNNL) in Richland, Washington are focused on assessing the effectiveness of nondestructive examination (NDE) techniques for inspecting control rod drive mechanism (CRDM) nozzles and J-groove weldments. The primary objective of this work is to provide information to the United States Nuclear Regulatory Commission (US NRC) on the effectiveness of NDE methods as related to the in-service inspection of CRDM nozzles and J-groove weldments, and to enhance the knowledge base of primary water stress corrosion cracking (PWSCC) through destructive characterization of the CRDM assemblies. In describing two CRDM assemblies removed from service, decontaminated, and then used in a series of NDE measurements, this paper will address the following questions: 1) What did each technique detect?, 2) What did each technique miss?, and 3) How accurately did each technique characterize the detected flaws? Two CRDM assemblies including the CRDM nozzle, the J-groove weld, buttering, and a portion of the ferritic head material were selected for this study. One contained suspected PWSCC, based on in-service inspection data and through-wall leakage; the other contained evidence suggesting through-wall leakage, but this was unconfirmed. The two CRDMs used in this study were cut from a pressure vessel head that has since been replaced. The selected NDE measurements follow standard industry techniques for conducting in-service inspections of CRDM nozzles and the crown of the J-groove welds and buttering. In addition, laboratory based NDE methods were employed to conduct inspections of the CRDM assemblies, with particular emphasis on inspecting the J-groove weld and buttering. This paper will also describe the NDE methods used and discuss the NDE results. Future work will involve using the results from these NDE studies to guide the development of a destructive characterization plan to reveal the crack morphology and a comparison of the degradation found by the destructive evaluation with the recorded NDE responses.

Overview of the ASME Section XI Code Relating to NDE and Ultrasonic Examination Performance Demonstration

1991 ◽  
Vol 113 (2) ◽  
pp. 170-173 ◽  
Author(s):  
C. D. Cowfer ◽  
O. F. Hedden
Keyword(s):  
Pressure Vessel ◽  
Probability Of Detection ◽  
Examination System ◽  
Fitness For Duty ◽  
Nondestructive Examination ◽  
Ultrasonic Examination ◽  
Examination Performance ◽  
Flaw Sizing ◽  
Performance Demonstration ◽  
Service Inspection

Nondestructive examination (NDE) in Section XI of the ASME Boiler and Pressure Vessel Code has been an evolving process. The Code’s use of NDE for in-service inspection (ISI) to establish fitness for duty has brought about major changes in applied NDE philosophy and practice. The publication in Section XI, 1989 Addenda, of mandatory Appendix VIII, “Performance Demonstration for Ultrasonic Examination System,” sets a precedent for both NDE performance and recognition of the total NDE system (personnel, equipment and procedures). This paper highlights appropriate portions of Appendix VIII. Performance values such as probability of detection (POD) and flaw sizing accuracy are addressed. The use of flawed specimens for performance demonstration qualifies personnel, equipment and procedures, hence the “Ultrasonic System” qualification. Appendix VIII provides the opportunity for technique performance demonstration for assessment of material aging and qualification of components and systems for continued service. This article provides the background and justification for Code action to publish Appendix VIII.

Prediction Method for Plastic Collapse of Pipes Subjected to Combined Bending and Torsion Moments

2010 ◽  
Author(s):  
Yinsheng Li ◽  
Kunio Hasegawa ◽  
Phuong H. Hoang ◽  
Bostjan Bezensek
Keyword(s):  
Entire Range ◽  
Estimation Method ◽  
Prediction Method ◽  
Bending Moment ◽  
Combined Loading ◽  
Plastic Collapse ◽  
Finite Element Analyses ◽  
Pure Torsion ◽  
Stainless Steel Pipe ◽  
Service Inspection

When a crack is detected in a pipe during in-service inspection, the failure estimation method given in the codes such as ASME Boiler and Pressure Vessel Code Section XI non-mandatory Appendix C or JSME S NA-1-2008 Appendix E-8 can be applied to assess the integrity of the pipe. In the current editions of these codes, the failure estimation method is provided for bending moment and pressure. Torsion load is assumed to be relatively small and is not considered in the method. In this paper, finite element analyses are conducted for 24-inch stainless steel pipe with a circumferential surface crack subjected to the combined bending and torsion moments, focusing on large and pure torsion moments. Based on the analysis results, a prediction method for plastic collapse under the combined loading conditions of bending and torsion is proposed for the entire range of torsion moments.

Inservice Inspection of Extended Dry Storage of Spent Nuclear Fuel, Part II: NDE/Sensor Technology Development and Codification

2021 ◽  
Author(s):  
Ryan M. Meyer ◽  
Jeremy Renshaw ◽  
Kenn Hunter ◽  
Mike Orihuela ◽  
Jim Stadler ◽  
...  
Keyword(s):  
Nuclear Fuel ◽  
Spent Nuclear Fuel ◽  
Technology Development ◽  
Storage System ◽  
Sensor Technology ◽  
Nondestructive Examination ◽  
Dry Storage ◽  
Safety Function ◽  
Majority Population ◽  
The Usa

Abstract This paper describes development and demonstration of nondestructive examination (NDE) technologies to support periodic examinations of interim dry storage system (DSS) canisters for spent nuclear fuel in the USA to verify continued safe operation and that the canister confinement is intact and performing its intended safety function. Specifically, this work relates to NDE technology development for “canister” based DSS systems, which form the majority population of DSSs in the USA for interim storage of spent nuclear fuel. Consideration of potential degradation of the welded stainless-steel canister in these systems is required for continued usage in the period of extended operation (PEO) beyond the initial license or certified term. Physical access to the canister surface is constrained due to narrow annulus spaces between the canister and the overpack, tortuous entry pathways, and high temperatures and radiation doses that can be damaging to materials and electronics related to inspections. Several activities to demonstrate NDE technologies for the inspections of different DSS systems are summarized.

scholarly journals Design Considerations for the Use of Ultrasonic Phased Array Probes in Weld Inspection

2000 ◽  
Author(s):  
Paul A. Meyer
Keyword(s):  
Ultrasonic Testing ◽  
Phased Array ◽  
Design Considerations ◽  
Array Probe ◽  
Ultrasonic Phased Array ◽  
Weld Inspection ◽  
Service Inspection

Ultrasonic testing of metal welds has been in use for many years. Scanning methods using both contact and immersion methods are often used at the time of manufacture and also during periodic in-service inspection programs. But because of a variety of component configurations and potential flaw geometries it is often necessary to perform several inspections, each with a different probe configuration to assure adequate defect delegability. It is possible that a properly designed phased array probe can perform several different inspections without changing hardware thereby reducing inspection times. This presentation reviews the design and operation of ultrasonic phased array transducers and the necessary features to achieve the desired performance. Situations in which these probes have already been implemented effectively are also discussed.

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