Title: Evaluation of WWER-440 Radiation Embrittlement Data Using the Semi-Mechanistic Model
Authors: ZHURKO D.KRASIKOV E.KRYUKOV A.DEBARBERIS LUIGI
Citation: Embrittlement and Mechanistic Interpretation of Reactor Pressure Vessel and Internal Materials vol. EUR21835EN, ISBN 92-79-00173-6 p. 92-101
Publisher: EC-JRC-IE
Publication Year: 2005
JRC N°: JRC34041
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC34041
Type: Contributions to Conferences
Abstract: The correct integrity assessment of reactor pressure vessel (RPV) is a main issue of NPP safety operation and the formula used up to now for WWER-440 material radiation embrittlement prediction does not always allow precise and conservative assessment. A large number of data points show systematically higher ATk experimental values when compared with prediction. Besides, a wide scatter is observed in correlation between measured and predicted data. Statistical methods are normally used for the evaluation of databases obtained on test results of irradiated Charpy specimens. In the present paper the statistical analysis of existing WWER-440 radiation embrittlement weld and base metal database has been carried out. In particular, the semi mechanistic model, which is an alternative model which based on additive contribution of three key mechanisms for RPV material radiation damage: direct matrix damage, precipitation (mainly copper) and element segregation (mainly phosphorus) is used in this paper for the WWER-440 RPV database evaluation and parameters are estimated.
JRC Institute:Institute for Energy and Transport

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.