Development of New ECT Probe Separating the Permebility Variation Signal in the SG Tube
- 1. KAERI, Daejeon (Korea, Republic of)
- 2. KRISS, Daejeon (Korea, Republic of)
- 3. Nawoo Tech, Seongnam (Korea, Republic of)
- 4. Hannam University, Daejeon (Korea, Republic of)
Description
A new ECT probe to separate the ECT signal distortion due to PVC (permeability variation clusters) and ordinary defects created in SG tubes has been developed. The hystersis loops of PVC which are extracted from retired SG (steam generator) tubes of Kori-1 NNP were measured. The tensile tests were performed to identify the mechanism of PVC creation. The conditions detecting the PVC created in 56 tubes were investigated using computer simulation, and the signal processing circuits were inserted in the probe for the digital signal transmission. The new Probe can measure and separate the PVC signal which is created in the SG tubes, and also measures the defects in Ni-sleeving part of SG tubes. Furthermore the new ECT probe can measure the defects as fast as bobbin probe, and enhance the testing speed as well as reliability of the defect detection of SG tubes
Additional details
Publishing Information
- Journal Title
- Journal of the Korean Society for Nondestructive Testing
- Journal Volume
- 28
- Journal Issue
- 1
- Series
- 12 refs, 9 figs
- Journal Page Range
- p. 9-15
- ISSN
- 1225-7842
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 41130457
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Descriptors DEI
- COMPUTERIZED SIMULATION; DEFECTS; KORI-1 REACTOR; PROBES; RELIABILITY; SIGNALS; STEAM GENERATORS; TENSILE PROPERTIES; TUBES
- Descriptors DEC
- BOILERS; ENRICHED URANIUM REACTORS; MECHANICAL PROPERTIES; POWER REACTORS; PWR TYPE REACTORS; REACTORS; SIMULATION; THERMAL REACTORS; VAPOR GENERATORS; WATER COOLED REACTORS; WATER MODERATED REACTORS