| Title |
Statistical Life Prediction on IASCC of Stainless Steel for PWR Core Internals |
| Authors |
김성우(Sung Woo Kim); 황성식(Seong Sik Hwang); 이연주(Yeon Ju Lee) |
| DOI |
https://doi.org/10.3365/KJMM.2012.50.8.583 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Alloys; aging; corrosion; tensile test; accelerated life testing model; irradiation-assisted stress corrosion cracking |
| Abstract |
This work is concerned with a statistical approach to the life prediction on irradiation-assisted stress corrosion cracking (IASCC) of stainless steel (SS) for core internals of a pressurized water reactor (PWR). The previous results of the time-to-failure of IASCC measured on neutron-irradiated stainless steel components were statistically analyzed in terms of stress and irradiation. The accelerating life testing model of IASCC of cold worked Type 316 SS was established based on an inverse power model with two stressvariables, the applied stress and irradiation dose. Considering the variation of the yield strength and applied stress with the irradiation dose in the model, the remaining life of the baffle former bolt was statistically predicted during operation under complex environments of stress and irradiation. |