Signal analysis of a bobbin-type integrated hall sensor array in electromagnetic testing for moisture separator reheater tubes

Abstract

A moisture separator reheater (MSR) system is installed between the high-pressure and low-pressure steam turbines in a nuclear power plant to increase the heat efficiency of the power plant. Erosion and corrosion of the MSR tubes have threatened the long-term operation of nuclear power plants. Thus a partial saturation eddy current testing (PSECT) method using a bobbin-type integrated Hall sensor array (BIHaS) was proposed in our previous study and it showed good results compared with a conventional PSECT. This paper presents a novel signal processing technique to improve detectability and measurability of electromagnetic testing method using a BIHaS through mitigating the inherent vibration signal noise between the BIHaS and ferritic stainless steel tubes.

Keywords

Hall sensor array partial saturation eddy current testing electromagnetic testing moisture separator reheater

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