Title: Annealing and Re-embrittlement of Reactor Pressure Vessel Materials - State of the Art Report
Publisher: European Commission
Publication Year: 2008
JRC N°: JRC46534
ISSN: 1018-5593
Other Identifiers: EUR 23449 EN
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC46534
Type: EUR - Scientific and Technical Research Reports
Abstract: Annealing of a reactor pressure vessel embrittled by neutron irradiation constitutes the only known technique to restore the initial material properties, to an extent that depends on the annealing conditions and on the materials. This technique is used in WWER-440 type reactor pressure vessels. A very important related issue is the one of re-embrittlement behaviour of the material after the annealing. In this respect, there is an obvious link with radiation embrittlement understanding. This report compiles the vast amount of information on annealing and re-embrittlement, which is available in the European countries where such annealing operations have been performed. In addition this topic was also investigated in various TACIS-PHARE projects, and the conclusions are included here as well. To complete the state-of-the-art, the results from a number of annealing experiments carried out in US on Western type RPV steels have also been considered.
JRC Directorate:Energy, Transport and Climate

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