... water reactors reactor pressure vessel irradiation thermal aging ductile-to-brittle transition temperature RADIATION EMBRITTLEMENT TREND CURVES AND EQUATIONS AND THEIR USE FOR RPV 144 INTEGRITY EVALUATIONS STP 1647, 2023 / available online at www.astm.org / doi: 10.1520/STP164720220076 Patrick...

... is carried out as a part of ongoing international activities related to the safe and long term operation of present NPP eet. KEYWORDS: reactor pressure vessel steels, ductile-to-brittle transition temperature, embrittlement, annealing, positron annihilation, atom probe tomography Introduction Nowadays...

... a correlation between transition temperature values evaluated using test results of standard (full-size) and subsize CVN specimens. Such a correlation is discussed. reactor pressure vessel radiation embrittlement ductile-to-brittle transition temperature subsize impact bend specimens specimen...

...×27.5 mm and 3×4×27 mm) for ductile-to-brittle transition temperature evaluation of templet material. The small samples were cut out from the inner surface of the all old Russian VVER-440 RPVs to assess the actual condition of the RPV material before and after post-irradiation annealing and after re...

... embrittlement of RPV materials. The results of studies of irradiation embrittlement of VVER-440/213 RPV steels using subsize specimens are discussed. KEYWORDS: reactor pressure vessel, radiation embrittlement, ductile-to-brittle transition temperature, subsize impact bend specimens, specimen reconstitution...

...-irradiation ductile-to-brittle transition temperature Ya. I. Shtrombakh1 and Yu. A. Nikolaev1 Journal of ASTM International, Vol. 4, No. 5 Paper ID JAI100696 Available online at www.astm.org Monitoring of Radiation Embrittlement of the First and Second Generation of VVER RPV Steels ABSTRACT: The analysis...

.... reactor pressure vessel surveillance specimens radiation embrittlement post irradiation annealing thermal aging ductile-to-brittle transition temperature Yu. A. Nikolaev1 Journal of ASTM International, Vol. 4, No. 8 Paper ID JAI100695 Available online at www.astm.org Radiation Embrittlement of Cr...

... in surveillance test programs. subsize Charpy specimen radiation embrittlement ductile-to-brittle transition temperature instrumented Charpy impact test correlation K. Dohi, I N. Soneda, J T. Onchi, i and H. Matsui 2 Correlation Between Subsize and Full-size Charpy Impact Properties...

... The actual values of the weld metal characteristics required for determination of the RPV lifetime, that is the ductile-to-brittle transition temperature (DBTT) in the unirradiated condition (T k0 ), the phosphorus and copper contents (that are known to affect the radiation stability of steel...

... is used for grain boundary segregation detection. The contribution of grain boundary embrittlement to mechanical property degradation due to neutron irradiation is assessed. reactor pressure vessel grain boundary segregation radiation embrittlement ductile-to-brittle transition temperature...

... plants are discussed. Different models of re-irradiation embrittlement are compared. A new model for assessment of embrittlement under re-irradiation is developed. reactor pressure vessel radiation embrittlement post-irradiation annealing re-irradiation ductile-to-brittle transition temperature...

... substantiated. Comparison between ductile-to-brittle transition temperatures (DBTT) for full-size and subsize Charpy specimens has been carried out. The relation between these two values has been clarified. The results of testing trepans and templates cut out from WWER-440 reactor pressure vessels...

... is presented. A new procedure for transforming data from subsize specimens was developed and is presented. The transformed data are in good agreement with data from full-size specimens for materials that have USE levels < 200 J. ductile-to-brittle transition temperature subsize specimens Charpy V...

...-precracked specimens provided valid data without the need for warm prestressing. The results from the small fatigue-precracked specimens were consistent with the data from the larger weld-embrittled specimens. fracture toughness crack arrest toughness ductile-to-brittle transition temperature Charpy...

... of several comparisons between the different specimen sizes have shown that the smaller specimens show qualitatively similar behavior to large specimens, although the upper-shelf energy level and ductile-to-brittle transition temperature are reduced. The upper-shelf energy levels from different specimen...

... for applying the MDBT approach to the determination of other mechanical properties. Progress in fatigue testing and in determination of the ductile-to-brittle transition temperature is reviewed briefly. mechanical property testing irradiated material properties miniaturized disk bend test (MDBT...

.... For a given interstitial content, the ductile-to-brittle transition temperature and the impact shelf energy were not influenced by the presence of 2 percent molybdenum or the change in chromium content from 18 to 25 percent. In order to achieve a low transition temperature and high shelf energy, the combined...

..., and oxygen). Sound welds were made in titanium-stabilized 26Cr-1Mo and 29Cr-4Mo alloys. It was concluded that welding procedures that optimize gas shielding must be used. Routine gas tungsten-arc welding procedures are not adequate. Because of the high ductile-to-brittle transition temperature and low notch...