Download or read book Study by Positron Annihilation of Neutron Damage in a Pressurized Water Reactor PWR Pressure Vessel Steel After a 13 Year Irradiation in the CHOOZ A Reactor Surveillance Program written by J. Bourgoin and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microstructural evolution of a pressure vessel steel (C shell base metal) was studied after a long-term irradiation (13 years) in the surveillance program of a CHOOZ A reactor. The positron lifetime technique was used to determine if the neutron-induced damage is partially composed of voids. Analysis of spectra measured on irradiated samples (fluence = 14 x 1019 n•cm-2, E > 1 MeV) reveals that the neutron irradiation has not induced the formation of voids containing more than about 50 vacancies (that is, voids with a radius higher than about 0.5 nm). On the other hand, some results suggest the presence after irradiation of a low density of very small voids (less than 10 vacancies) probably located in precipitates.

Download or read book Radiation Embrittlement of Nuclear Reactor Pressure Vessel Steels written by Lendell E. Steele and published by ASTM International. This book was released on 1993 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Positron annihilation study of radiation damage in neutron irradiated reactor pressure vessel steels written by Gerhard Brauer and published by . This book was released on 1990 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acta Polytechnica Scandinavica written by and published by . This book was released on 1998 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metals Abstracts written by and published by . This book was released on 1993 with total page 1220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Positron Annihilation written by Zsolt Kajcsos and published by . This book was released on 1992 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Characterization of Materials in Aging Systems Volume 503 written by Robert L. Crane and published by Mrs Proceedings. This book was released on 1998-08-14 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 43 papers describe new techniques for characterizing the location and size of cracks, the extent of water absorption in adhesives and other polymers, neutron-induced losses of fracture toughness in reactor steels, and the weathering of concrete. They also present applications to structures that for economic reasons are being used well past their design lives. Special emphasis is given to the structural health of concrete, defects in high- strength aircraft materials, and steels in nuclear reactors. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Positron Annihilation Studies on Neutron Irradiated Pressure Vessel Steels written by and published by . This book was released on 1987 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neutron Irradiation Embrittlement of Reactor Pressure Vessel Steels written by Lendell E. Steele and published by . This book was released on 1975 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Positron Annihilation and M ssbeuer Studies of Neutron Irradiated Reactor Pressure Vessel Steel written by Gerhard Brauer and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Radiation Embrittlement of Nuclear Reactor Pressure Vessel Steels written by Lendell E. Steele and published by ASTM International. This book was released on 1986 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Positron annihilation and M ssbauer studies of neutron irradiated reactor pressure vessel steels written by and published by . This book was released on 1990 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Positron annihilation studies on neutron irradiated pressure vessel steels written by and published by . This book was released on 1987 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Overview of U S Research and Regulatory Activities on Neutron Radiation Embrittlement of Pressure Vessel Steel written by PN. Randall and published by . This book was released on 1989 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper is in several parts: the first presents an overview of research activities sponsored by the U.S. Nuclear Regulatory Commission (NRC) on neutron irradiation embrittlement of pressure vessel steels. A series of irradiation experiments have evaluated effects of chemistry on the fracture toughness properties of submerged arc welds representing current nuclear vessel fabrication practices and provide data to validate ASME Code practices. A correlation between Charpy energy and fracture toughness is being studied as is a program on radiation sensitivity to define the role of dose rate and to study the effects of postirradiation heat treatment (annealing). The development of a comprehensive data base for radiation embrittlement data has been initiated and is being applied in a correlation of reactor surveillance data with test reactor data. A comprehensive dosimetry effort has produced validated standard methods for calculating and measuring neutron flux and fluence parameters and the correlation of these parameters to embrittlement of pressure vessel steels in light water reactors. Our knowledge of radiation damage to reactor vessels has also been greatly increased in recent years by the accumulation of power reactor surveillance data and by better models and better analysis techniques applied to that data. Unfortunately, the results show that radiation damage is often more than previously predicted, using Revision 1 of NRC Regulatory Guide 1.99, and will result in more restrictive pressure temperature limits. The second part of this paper describes some of the system and operational impacts produced, which in turn lead to challenges to long-established safety margins. Finally, a number of outstanding issues which require further research are discussed, many of which will require better understanding of radiation damage mechanisms.

Download or read book Positron Annihilation Studies of Neutron Irradiated Reactor Pressure Vessel Steels written by Gerhard Brauer and published by . This book was released on 1988 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annealing studies of neutron irradiated reactor pressure vessel steels by positron annihilation written by Gerhard Brauer and published by . This book was released on 1988 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Positron Annihilation Studies on Neutron Irradiated Pressure Vessel Steels written by and published by . This book was released on 1987 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: