کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
295269 511536 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of ultrasonic waveguide techniques for under-sodium viewing
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Development of ultrasonic waveguide techniques for under-sodium viewing
چکیده انگلیسی

An ultrasonic imaging system based on waveguide techniques was developed to provide in-service inspection of reactor core of a sodium-cooled fast reactor (SFR) and potential applications in other hostile environments. By using the ultrasonic waveguide techniques, we overcome the major technical challenge in developing an under-sodium viewing (USV) system that can withstand the high-temperature and corrosive environment. The chosen design of the prototype waveguide (WG) is a hybrid of bundle and spiraled-sheet WG. The prototypes show high detection sensitivity with minimal background noise by effectively reducing spurious echoes and mode conversions. Tests on prototype waveguide transducers were conducted in liquid sodium up to 340 °C (650 °F). C-scan images of the targets were successfully developed from both time-of-flight and amplitude variations of the reflected echoes. The ultrasonic waveguide imaging system demonstrates a capability of detecting defects with 1 mm width and 0.5 mm depth under molten sodium.


► Developed a novel ultrasonic waveguide technique for under-sodium imaging.
► Reduced the spurious echoes and mode conversions effectively.
► Demonstrated the imaging capability in molten sodium up to 650 °F successfully.
► Achieved defects detection with lateral resolution of 1 mm and vertical resolution of 0.5 mm.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: NDT & E International - Volume 49, July 2012, Pages 71–76
نویسندگان
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