AbstractAbstract
[en] Nuclear graphite under load shows remarkably high creep ductility with neutron irradiation, well in excess of any strain experienced in un-irradiated graphite. As this behaviour compensates, to some extent, some other irradiation effects such as dimensional change or thermal shutdown stresses, it is an important property. This paper briefly reviews the approach to irradiation creep in the UK as described by the UK Creep Law as well as other countries. It then offers an alternative analysis of irradiation creep, using the AGR moderator graphite as an example, to high values of neutron fluence and applied stress. The paper will demonstrate that the new analysis provides for a more physically satisfying explanation for the decrease in the apparent creep strain observed at high fluence. The prediction of creep strain for a range of graphites and applications, including HTR systems, will be discussed. (author)
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Organisation for Economic Co-Operation and Development - Nuclear Energy Agency, 75 - Paris (France); 277 p; ISBN 92-64-01601-5; ; 2004; p. 107-120; 3. information exchange meeting; Ibaraki-ken (Japan); 11-12 Sep 2003; 32 refs.
Record Type
Book
Literature Type
Conference
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