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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.6
- 수록면
- 663 - 667 (5page)
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초록· 키워드
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Delayed hydride cracking (DHC) was first observed in pressure tubes in Canadian CANDU reactors. In light water reactors, DHC was not observed until the late 1990s in high-burnup boiling water reactor (BWR) fuel cladding. In recent years, the focus on DHC has resurfaced in light of the increased interest in the cladding integrity during interim conditions. In principle, all spent fuel in the wet pools has sufficient hydrogen content for DHC to operate below 300℃. It is therefore of importance to establish the critical parameters for DHC to operate. This work studies the threshold stress intensity factor (KIH) to initiate DHC as a function of temperature in Zry-4 for temperatures between 227℃ and 315℃. The experimental technique used in this study was the pin-loading testing technique. To determine the KIH, an unloading method was used where the load was successively reduced in a stepwise manner until no cracking was observed during 24 hours. The results showed that there was moderate temperature behavior at lower temperatures. Around 300℃, there was a sharp increase in KIH indicating the upper temperature limit for DHC. The value for KIH at 227℃ was determined to be 2.6 ± 0.3 MPa √m.
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참고문헌 (24)
참고문헌 신청
W.L. Mudge / 1953 / Effect of hydrogen on the embrittlement of zirconium and zirconium-tin alloys / Symposium on zirconium and zirconium alloys :146~167
C. E. Coleman / 1966 / The hydrogen embrittlement of zirconium in slowbend tests / J. Nucl. Mater 19:1~8
J.B. Bai / 1994 / Hydride embrittlement in Zircaloy-4 plate: part I, influence of microstructure on the hydride embrittlement in Zircaloy-4 at 20℃ and 350℃ / Metall. Trans 25A:1185~1197
D. Hardie / 1972 / The influence of the matrix on the hydrogen embrittlement of zirconium in bend tests / J. Nucl. Mater 42:317~324
C. J. Simpson / 1974 / Delayed hydrogen embrittlement of Zr-2. 5wt% Nb / J. Nucl. Mater 52:289~295
C. E. Coleman / 1966 / The hydrogen embrittlement of zirconium in slowbend tests / J. Nucl. Mater 19:1~8
J.B. Bai / 1994 / Hydride embrittlement in Zircaloy-4 plate: part I, influence of microstructure on the hydride embrittlement in Zircaloy-4 at 20℃ and 350℃ / Metall. Trans 25A:1185~1197
D. Hardie / 1972 / The influence of the matrix on the hydrogen embrittlement of zirconium in bend tests / J. Nucl. Mater 42:317~324
C. J. Simpson / 1974 / Delayed hydrogen embrittlement of Zr-2. 5wt% Nb / J. Nucl. Mater 52:289~295
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