... are then presented. Finally, we discuss preliminary work supporting potential alternatives to the embrittlement trend curve present in the current revision of the regulatory guide. Charpy V-notch embrittlement trend curve fluence neutron flux neutron embrittlement nuclear power plant materials...

... and specimens are discussed. ASTM E-23 Charpy V-notch EN 10045 impact testing ISO 148 machine verification Journal of ASTM International, February 2006, Vol. 3, No. 2 Paper ID JAI12869 Available online at www.astm.org C. McCowan,1 G. Roebben,2 Y. Yamaguchi,3 S. Lefrançois,4 J. Splett,5 S. Takagi,6...

... of reasonable, practical, and meaningful verification requirements that might be proposed for use in both documents. Charpy V-notch impact certification program impact testing notched-bar testing pendulum impact machines reference specimens J. D. Splett1 and C. N. McCowan2 Journal of ASTM...

...) overrecovers as a consequence of annealing, which may explain why the USE value after a significant amount of reirradiation is approximately equal to the USE value in the unirradiated condition. annealing reactor pressure vessel Charpy V-notch irradiation neutron weld metal copper S. K. Iskander...

... is that asymmetric fracture generally occurs in about 50% of all cases, but that small series of tests may produce nearly all symmetric or nearly all asymmetric failures, influencing the mean value of the measured impact toughness. Charpy V-notch standardisation asymmetric fracture European certification...

... for these observations and will allow, it is hoped, machines to be maintained at higher levels of accuracy. absorbed energy Charpy V-notch impact test machine repair misalignment verification testing worn anvils Daniel P. Vigtiotti, ~Tom A. Siewert, 1and Chris N. McCowan~ Maintaining the Accuracy...

... in the literature but also proposed by SCK•CEN in the frame of enhanced surveillance of nuclear reactor pressure vessels. Conclusions are drawn regarding the applicability and reliability of these methodologies. Charpy V-notch instrumented impact testing subsize specimens correlations between different...

... had a 27°C (49°F) higher transition temperature than the beltline weld. Some postirradiation data are available and are presented in this paper, but the major part of the irradiation effects study will be reported subsequently. Charpy V-notch reactor pressure vessel copper nickel weld metal...

... Modifications were made to a conventional Charpy machine to accommodate the miniaturized Charpy V-Notch (MCVN) specimens which were fabricated from an archived reactor pressure vessel (RPV) steel. Over 100 dynamic MCVN tests were performed and compared to the results from conventional Charpy V...

... Charpy V-notch data. A calculation of the 30 ft-lb (41 J) shifts was also performed to establish an expanded database for monitoring embrittlement trends. These new shift data values were compared to the Reg. Guide predictions, and mean residual errors calculated for weld and base materials. The results...

... on the toughness properties of reirradiating a vessel that has been annealed. This paper describes the annealing response of irradiated high-copper submerged-arc weld HSSI 73W. For this study, the weld has been annealed at 454°C (850°F) for lengths of time varying between 1 and 14 days. The Charpy V-notch 41-J (30...

... by the existing surveillance programs. Testing of subsize specimens manufactured from broken halves of previously tested surveillance Charpy V-notch (CVN) specimens offers an attractive means of extending existing surveillance programs. Using subsize CVN type specimens requires the establishment of a specimen...

... Charpy V-notch specimens from one lot of high-strength steel were tested using three machines to determine reference values for three measures of toughness: absorbed energy, lateral expansion, and height of shear lips. The broken specimens were examined to determine the location and magnitude...

... reconstituted and 10 mm inserts can be reconstituted with limited success. Charpy V-Notch reconstitution projection welding upper shelf energy pressure vessel steel A302B A533B modified A302B James F. Williams a Regis P. Shogan b Leo Albertin a THE OPTIMIZATION OF INSERT SIZE FOR RECONSTITUTING...

... The two most common Charpy V-notch striker designs (8-mm and 2-mm radii on the striking edge) were compared using verification (reference-grade) impact specimens. Other variables in the test matrix included two different brands of U-type pendulum machines and four different specimen energy...

... are attributed to the different techniques used to develop the starter crack in the modified Charpy specimen. Charpy V-Notch Instrumented Impact Test Lower bound toughness C h r i s t o p h e r N. M c C o w a n I, James W. D a l l y 2, Daniel P. V i g l i o t t i I and Ouk S. Lee 3 LOW COST LOWER...

...-brittle-transition temperature (DBTT) static and dynamic yield strength ductility Charpy V-notch neutron flux neutron fluence upper shelf energy Chaitanyamoy Ganguly,1 U. K. Viswanathan,1 and K. S. Balakrishnan I Study on the Irradiation Embrittlement of a Microalloyed Ferritic Steel REFERENCE...

...-loading patterns. Also included are pressure vessel embrittlement considerations relating to plant rerating and plant life extension. Charpy V-notch radiation embrittlement pressure vessel steel surveillance program James S. Perrin ~ A Utility Perspective on Management of Reactor Pressure...

... This work deals with the mechanical properties of reactor pressure vessel (RPV) steels used in the pressurized water reactors (PWR) of former Soviet type WWER-440. The materials under investigation were a forging (base metal 15Kh2MFA) and the corresponding weld. Charpy V-notch specimens...

... irradiation effects Charpy V-notch impact properties drop-weight tests ductile transition brittle transition STP1046-EB/May 1990 Franz J. Schmitf Correlation of Cv and Drop-Weight Transition Temperature Increase Caused by Irradiation REFERENCE: Schmitt. F. J.. "Correlation of C, and Drop-Weight...