Erasmus, CKok, SHindley, MP2013-11-292013-11-292013-05Erasmus, C, Kok, S and Hindley, M.P. 2013. Significance of primary irradiation creep in graphite. Journal of Nuclear Materials, vol. 436(1-3), pp 167-1740022-3115http://ac.els-cdn.com/S0022311512005922/1-s2.0-S0022311512005922-main.pdf?_tid=284d78a6-581a-11e3-b893-00000aab0f6b&acdnat=1385635692_6e8b803eecda251a2a004c858f4c2c6fhttp://hdl.handle.net/10204/7110Copyright: 2013 Elsevier. This is an ABSTRACT ONLY. The definitive version is published in Journal of Nuclear Materials, vol. 436(1-3), pp 167-174Traditionally primary irradiation creep is introduced into graphite analysis by applying the appropriate amount of creep strain to the model at the initial time-step. This is valid for graphite components that are subjected to high fast neutron flux fields and constant stress fields, but it does not allow for the effect of movement of stress locations around a graphite component during life, nor does it allow primary creep to be applied rate-dependently to graphite components subject to lower fast neutron flux. This paper shows that a differential form of primary irradiation creep in graphite combined with the secondary creep formulation proposed by Kennedy et al. performs well when predicting creep behaviour in experimental samples. The significance of primary irradiation creep in particular in regions with lower flux is investigated. It is shown that in low flux regions with a realistic operating lifetime primary irradiation creep is significant and is larger than secondary irradiation creep.enIrradiation induced creepNuclear materialsArticleErasmus, C., Kok, S., & Hindley, M. (2013). Significance of primary irradiation creep in graphite. http://hdl.handle.net/10204/7110Erasmus, C, S Kok, and MP Hindley "Significance of primary irradiation creep in graphite." (2013) http://hdl.handle.net/10204/7110Erasmus C, Kok S, Hindley M. Significance of primary irradiation creep in graphite. 2013; http://hdl.handle.net/10204/7110.TY - Article AU - Erasmus, C AU - Kok, S AU - Hindley, MP AB - Traditionally primary irradiation creep is introduced into graphite analysis by applying the appropriate amount of creep strain to the model at the initial time-step. This is valid for graphite components that are subjected to high fast neutron flux fields and constant stress fields, but it does not allow for the effect of movement of stress locations around a graphite component during life, nor does it allow primary creep to be applied rate-dependently to graphite components subject to lower fast neutron flux. This paper shows that a differential form of primary irradiation creep in graphite combined with the secondary creep formulation proposed by Kennedy et al. performs well when predicting creep behaviour in experimental samples. The significance of primary irradiation creep in particular in regions with lower flux is investigated. It is shown that in low flux regions with a realistic operating lifetime primary irradiation creep is significant and is larger than secondary irradiation creep. DA - 2013-05 DB - ResearchSpace DP - CSIR KW - Irradiation induced creep KW - Nuclear materials LK - https://researchspace.csir.co.za PY - 2013 SM - 0022-3115 T1 - Significance of primary irradiation creep in graphite TI - Significance of primary irradiation creep in graphite UR - http://hdl.handle.net/10204/7110 ER -