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To simulate the verification process using materials from a decommissioned reactor, a mock-up of the bottommounted instrument nozzle in the Kori 1 reactor, where the nozzle was attached to a plate by J-groove dissimilar metal welding, was fabricated. The mock-up distortion was quantified by measuring the plate surface displacement after welding. The residual stresses formed on the support plate surface and the inner surface of the nozzle were then analyzed using the hole-drilling method, contour method, and neutron diffraction. Welding simulations were performed using a 3D finite element method to validate the measured results. The measured and computed stress distributions on the support plate exhibited reasonable agreement. Conversely, the stresses on the inside of the nozzle were found to have an indisputable difference in the contour method and neutron diffraction measurements, which demonstrated strong tensile and compressive hoop stresses, respectively. The possible origins of such differences were investigated and we have provided some suggestions for a precise evaluation in the simulation. This study is expected to be useful in future research on decommissioned reactors.

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권호기사 목록 테이블로 기사명, 저자명, 페이지, 원문, 기사목차 순으로 되어있습니다.
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Neutron irradiation impact on structural and electrical properties of polycrystalline Al2O3 Sunil Kumar, Sejal Shah, S. Vala, M. Abhangi, A. Chakraborty p. 402-409

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Determination of the number of 235U target nuclei in the irregular target using a fission time projection chamber Jiajun Zhang, Jun Xiao, Junjie Sun, Mingzhi Zhang, Taiping Peng, Pu Zheng p. 444-450

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참고문헌 (16건) : 자료제공( 네이버학술정보 )

참고문헌 목록에 대한 테이블로 번호, 참고문헌, 국회도서관 소장유무로 구성되어 있습니다.
번호 참고문헌 국회도서관 소장유무
1 Residual stress determination in a dissimilar weld overlay pipe by neutron diffraction 미소장
2 Cross-sectional mapping of residual stresses in a VPPA weld using the contour method 미소장
3 Investigations on welding residual stresses in penetration nozzles by means of 3D thermal elastic plastic FEM and experiment 미소장
4 Precise Determination of Residual Stresses in Large Specimens by Neutron Diffraction 미소장
5 Through-thickness distributions of residual stresses in two extreme heat-input thick welds: A neutron diffraction, contour method and deep hole drilling study 미소장
6 Residual stress assessment of nickel-based alloy 690 welding parts 미소장
7 Effect of wavelength-dependent attenuation on neutron diffraction stress measurements at depth in steels 미소장
8 Sensitivity Analysis of Finite Element Parameters for Estimating Residual Stress of J-Groove Weld in RPV CRDM Penetration Nozzle 미소장
9 Assessment of Round Robin Analyses Results on Welding Residual Stress Prediction in a Nuclear Power Plant Nozzle 미소장
10 Evaluation of Residual Stresses Relaxation by Post Weld Heat Treatment Using Contour Method and X-ray Diffraction Method 미소장
11 (Reference title not available) 미소장
12 Weld residual stresses in a thick plate considering back chipping: Neutron diffraction, contour method and finite element simulation study 미소장
13 Distortion and residual stresses in thick plate weld joint of austenitic stainless steel: Experiments and analysis 미소장
14 Experimental Characterisation and Numerical Modelling of Residual Stresses in a Nuclear Safe-End Dissimilar Metal Weld Joint 미소장
15 Failure Evaluation Plan of a Reactor Internal Components of a Decommissioned Plant 미소장
16 Numerical and experimental investigation on distribution of residual stress and the influence of heat treatment in multi-pass dissimilar welded rotor joint of alloy 617/10Cr steel 미소장

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