Final Results from the Crack Initiation and Arrest of Irradiated Steel Materials Project on Fracture Mechanical Assessments of Pre-Irradiated RPV Steels Used in German PWR

Hein, H.; Keim, E.; Schnabel, H.; Seibert, T.; Gundermann, A.

doi:10.1520/stp49002s

Cited by 2 publications

(1 citation statement)

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“…Figure 13 shows an example graph of the correlation between T 0 and T 41J [9]. The equivalence of the conventional reference temperature (RT NDT ) and master curve reference temperature (RT T0 ) in ASME code cases has been examined in various irradiated commercial steels such as surveillance materials, MTR-irradiated archive materials and decommissioned pressure vessel steels [149][150][151][152][153]. It was confirmed that the master curve reference temperature generally gives conservative evaluation of fracture toughness.…”

Section: Fracture Toughnessmentioning

confidence: 98%

Current understanding of radiation-induced degradation in light water reactor structural materials

Fukuya¹

2013

Journal of Nuclear Science and Technology

145

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Current phenomenological knowledge and understanding of mechanisms are reviewed for radiation embrittlement of reactor pressure vessel low alloy steels and irradiation assisted stress corrosion cracking of core internals of stainless steels. Accumulated test data of irradiated materials in light water reactors and microscopic analyses by using state-of-the-art techniques such as a three-dimensional atom probe and electron backscatter diffraction have significantly increased knowledge about microstructural features. Characteristics of solute clusters and deformation microstructures and their contributions to macroscopic material property changes have been clarified to a large extent, which provide keys to understand in the degradation mechanisms. However, there are still fundamental research issues that merit study for long-term operation of reactors that requires reliable quantitative prediction of radiation-induced degradation of component materials in low-dose rate high-dose conditions.

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