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KMID : 0371819970290020175
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Nuclear Engineering and Technology
1997 Volume.29 No. 2 p.175 ~ p.180
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Water-Side Oxide Layer Thickness Measurement of the Irradiated PWR Fuel Rod by ECT Method
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Park Kwang-June
Chun Yong-Bum
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Abstract
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It has been known that meter-side corrosion of fuel rods in nuclear reactor is accompanied with the metallic loss of well thickness and hydrogen pickup in the fuel cladding tube. The fuel clad corrosion is one of the major factors to be controlled to maintain the fuel integrity during reactor operation. An oxide layer thickness measuring device equipped mith ECT probe system was developed by KAERI, and whose performance test was carried out in NDT(Non-Destructive Test) hot-cell of PIE(Post Irradiation Examination) Facility. At first, the calibration/performance test was executed for the unirradiated standard specimen rod fabricated with several kinds of plastic thin films whose thickness were predetermined, and the result of which showed a good precision within 10% of discrepancy. And then, hot test was performed for the irradiated fuel rod selectively extracted from J44 fuel assembly dicharged from Kori Unit-2. The data obtained with this device were compared With the metallographic results obtained from destructive examination in PIEF hot-cell on the same fuel rod to verlfy the validity of the measurement data.
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