Abstract This paper discusses the possibility of in-situ evaluation of crack propagation using Eddy Current Monitoring (ECM) system in a Boiling Water Reactor (BWR) environment. For the purpose, an ECM experiment was conducted at the System Safety Benchma rk Facility (SSBF). The target for the monitoring was a large-scale pipe specimen made of austenitic stainless steels 304L, 316L, and carbon steel STS410, connected by weld joints of nickel based alloy 182. Slits were prepared at the Heat Affected Zones (...
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In-situ Crack Evaluation using Eddy Current Monitoring in a Boiling Water Reactor Environment

This paper describes the feasibility of Eddy Current Monitoring (ECM) system as an in-situ evaluation method of crack propagation in a Boiling Water Reactor (BWR) environment. For the purp ose, we explain an ECM experiment conducted at a System Safety Benchmark Facility (SSBF) with a large-scale austenitic stainless steel pipe specimen. Several slits were prepared at the Heat Affected Zones (HAZS) and weld lines from the inner surface. After exerting the load, Eddy Current Testing (ECT) probes attached on ...
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Development of Eddy Current Monitoring System andIts Application to Crack Propagation Monitoring

This paper discusses the feasibility of shroud inspections using Eddy Current Testing (ECT). For the purpose, the three steps of simulations were carried out. At first, the propagation of postulated cracks in the H4 weld line of the shroud was estimated. Subsequently, the eddy current signals were numerically simulated based on the reduced vector potential method. At last, the inverse analyses were performed using simulated ECT signals, and crack shapes were reconstructed. The high accuracy of crack reconst...
英字タイトル:
Simulation of Shroud Inspection based on Eddy Current Testing

Abstract We clarified a defect detecting capability of eddy current testing (ECT) as a surface inspection technique for underwater laser beam welding. An underwater laser beam welding procedure includes groove caving as a preparation, laser beam welding in groove and welding surface grinding as a post treatment. Therefore groove and grinded welding surface inspections are required underwater. We curried out defect detection test s using three kinds of specimens simulated a groove, reactor vessel nozzle dis...
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Applicability Evaluation of Eddy Current Testing for Underwater Laser Beam Welding

This paper discusses the possibility of in-situ quantitative evaluation of crack propagation using Eddy Current Monitoring (ECM) system in a Boiling Water Reactor (BWR) environment. For the purpose, ECM experiment was conducted at a System Safety Benchmark Facility (SSBF). The target for the monitoring was a large-scale pipe specimen made of austenitic stainless steels 304L, 316L, and carbon steel STS410, connected by weld joints of nickel based alloy 182 within the SSBF. Slits were prepared at the H...
英字タイトル:
Quantitative Monitoring of Crack Propagation in High Temperature Environment Using Eddy Current Testing