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eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2023
ISBN: 978-0-8031-7741-3
... countries is increased by the results of extended surveillance programs and testing reconstituted specimens. For each unit sufficient high-fluence data were available at the first years of operation to directly evaluate the Charpy and Master Curve shift, and therefore the use of embrittlement trend curves...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2005
ISBN-10: 0-8031-3479-7
ISBN: 978-0-8031-3479-9
... constant amplitude loading and renders reduced component dimensions. Reliable reconstitution and simulation methods for service load-time histories require not only the rainflow matrices, but also information about the order of the cycles described by Markovian matrices, the power spectral density...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2002
ISBN-10: 0-8031-2897-5
ISBN: 978-0-8031-2897-2
... This paper summarizes the experience of the RESQUE project. The final objective of the project was the development of a set of ‘Recommendations for Reconstitution of Non-Irradiated and Irradiated Charpy-size Specimens,’ based on the systematic analysis of the experimental data from the program...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2002
ISBN-10: 0-8031-2897-5
ISBN: 978-0-8031-2897-2
... This paper continues reporting on the EU-sponsored research project RESQUE [1]. First detailed checks with different ways to instrument reconstitution inserts were performed and thin silver soldered thermocouples were chosen to be used in the project. Temperature transients in welded inserts...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2002
ISBN-10: 0-8031-2897-5
ISBN: 978-0-8031-2897-2
... Surveillance specimens, for example Charpy specimens, are used to monitor the effect of irradiation embrittlement on Reactor Pressure Vessel (RPV) steels. Reconstitution technology is an advanced method that can be used to avoid possible shortages of surveillance specimens in case of long-term...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2002
ISBN-10: 0-8031-2897-5
ISBN: 978-0-8031-2897-2
... This paper reports on the reconstitution of reactor pressure vessel steel specimens with CO 2 -laser beam welding. Experiments were carried out using a 45 kW continuous wave (CW) CO 2 -laser with a power that varied between 9 to 32 kW. and a welding speed from 1 m/min to 5 m/min. The ability...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 2000
ISBN-10: 0-8031-2852-5
ISBN: 978-0-8031-2852-1
... tested in three-point bend and compared with the original data obtained on large compact tension (CT) samples. Fracture toughness tests were performed in both unirradiated and irradiated (T irrad ≈288°C and Φ≈1.5 10 19 n/cm 2 , E>1MeV) conditions. Most of the Charpy size samples were reconstituted...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1999
ISBN-10: 0-8031-2614-X
ISBN: 978-0-8031-2614-5
... plant operation, and the current use of a lateral shift model for re-embrittlement trending is expected to be conservative. The program also uses reconstituted Charpy specimens and new surveillance capsules following the program format developed for ASTM Standard Guide for In-Service Annealing of Light...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
ISBN-10: 0-8031-2476-7
ISBN: 978-0-8031-2476-9
... In 1992, ASTM initiated a Round-Robin on Reconstitution (RRR) to contribute to review the ASTM E1253 Guide on Charpy reconstitution. The purpose of this RRR was to study the influence of parameters, such as the reconstitution technique, the insert length, the hammer tup geometry and the material...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
ISBN-10: 0-8031-2476-7
ISBN: 978-0-8031-2476-9
... of the Charpy impact test. Suitable index temperatures are derived from the test data of tested specimens of surveillance programs or from test data of specimens cut out of templets of RPVs. Due to lack of material, subsize and/or reconstituted specimens will be often used. In this paper investigations...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
ISBN-10: 0-8031-2476-7
ISBN: 978-0-8031-2476-9
... Fracture toughness is one of the most important material properties that influences the integrity of reactor pressure vessels (RPVs). Methods for reconstitution of fracture toughness specimen have been developed preliminarily in order to increase the number of fracture toughness data...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1998
ISBN-10: 0-8031-2476-7
ISBN: 978-0-8031-2476-9
... The method of surface activated joining (SAJ) was applied to reconstitution of Charpy impact specimens. SAJ makes use of friction at material surfaces in a vacuum to achieve joining without melting. This paper describes verification to apply SAJ to reconstitution of Charpy impact specimens...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2016-8
ISBN: 978-0-8031-2016-7
.... Reactor pressure vessel steel irradiation embrittlement surveillance reconstitution fracture toughness micromechanics damage modeling safety A. Fabry 1, J. Van de Velde 1, J.L. Puzzolante 1, T. Van Ransbeeck 1, A. Verstrepen ~, E.C. Biemiller2 , 1LG. Carter3 , T. Petrova4 RESEARCH TO UNDERSTAND...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2016-8
ISBN: 978-0-8031-2016-7
... A comprehensive review of the status of the reconstitution technique, as applied to reactor pressure vessel steel, is given. The reconstruction techniques in use at this moment on different small-size specimen geometries are highlighted, and the reconstitution methodology is evaluated...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2016-8
ISBN: 978-0-8031-2016-7
... Charpy-size tensile specimens have been reconstituted starting from broken Charpy specimens. Precautions have been taken to prevent fracture in the weld regions of the reconstituted specimens. Careful qualification of the tensile properties of the reconstituted tensile bars has been established...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2016-8
ISBN: 978-0-8031-2016-7
... 10×10×10mm cubes, made from broken halves of un-irradiated and irradiated L-T oriented Charpy-V surveillance specimens of the Boiling Water Reactor (BWR) Philippsburg 1, were reconstituted to L-T and T-L oriented Charpy-V bars using the studgun welding technique of the Belgian Nuclear Research...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1996
ISBN-10: 0-8031-2016-8
ISBN: 978-0-8031-2016-7
... surveillance samples remain in the reactor. The large variation and uncertaintity in neutron flux over the irradiated materials produce significant scatter in mechanical properties and necessitate a re-evaluation of results using gamma scanning, specimen reconstitution and recalculation. In order to provide...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1995
ISBN-10: 0-8031-2018-4
ISBN: 978-0-8031-2018-1
... The reconstitution of previously tested Charpy impact specimens via projection welding can be used to obtain additional data for nuclear reactor surveillance programs. Typically, a broken Charpy half contains a large portion of untested material. This untested material can be machined from...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1993
ISBN-10: 0-8031-1869-4
ISBN: 978-0-8031-1869-0
... As nuclear power plants approach end-of-license (EOL) and consideration is given to license renewal, there is an ever increasing need to expand the amount of data obtainable from the original surveillance specimens. A laser welding technique to reconstitute broken Charpy specimens is being...
eBook Chapter
Series: ASTM Selected Technical Papers
Publisher: ASTM International
Published: 1986
ISBN-10: 0-8031-0489-8
ISBN: 978-0-8031-0489-1
... to function in protein synthesis and enzyme secretion. One major and two minor forms of cytochrome P-450 were partially purified from blue crab hepatopancreas microsomes. The major form in a reconstituted enzyme system was active in oxidizing benzo(a)pyrene to a series of phenols and diols. aquatic...