TY - RPRT A1 - Kanzler, Daniel A1 - Müller, Christina A1 - Pitkänen, J. T1 - Probability of defect detection of Posiva's electron beam weld N2 - The report 'Probability of Defect Detection of Posiva's electron beam weld' describes POD curves of four NDT methods radiographic testing, ultrasonic testing, eddy current testing and visual testing. POD-curves are based on the artificial defects in reference blocks. The results are devoted to the demonstration of suitability of the methods for EB weld testing. Report describes methodology and procedure applied by BAM. Report creates a link from the assessment of the reliability and inspection performance to the risk assessment process of the canister final disposal project. Report ensures the confirmation of the basic quality of the NDT methods and their capability to describe the quality of the EB-weld. The probability of detection curves are determined based on the MIL-1823 standard and it's reliability guidelines. The MIL-1823 standard was developed for the determination of integrity of gas turbine engines for the US military. In the POD-process there are determined as a key parameter for the defect detectability the a90/95 magnitudes, i.e. the size measure a of the defect, for which the lower 95 % confidence band crosses the 90 % POD level. By this way can be confirmed that defects with a size of a90/95 will be detected with 90 % probability. In case the experiment will be repeated 5 % might fall outside this confidence limit. KW - Probability of detection curves KW - POD-curves KW - NDT-methods KW - EB-welding KW - Ultrasonic inspection KW - Radiographic inspection KW - Eddy current inspection KW - Visual inspection PY - 2013 UR - http://www.posiva.fi/en/databank/working_reports/probability_of_defect_detection_of_posiva_s_electron_beam_weld.1874.xhtml?xm_col_report_year=2013&xm_col_language=3&xm_col_type=5&cd_order=col_report_number&cd_offset=0#.VJAIY3uj_mc UR - http://www.posiva.fi/files/3527/WR_2013-70.pdf SP - 1 EP - 86 AN - OPUS4-32512 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -