Abstract

Irradiation creep and irradiation stress relaxation data have been obtained for CW 316 SS and SA 304L SS in the Halden reactor. The measurements were performed on-line during irradiation. The irradiation creep in this thermal neutron spectrum reactor was observed to be very different than values measured in fast neutron spectrum reactors. The steady state irradiation creep rate was higher in this and other thermal neutron spectrum reactors than in fast neutron spectrum reactors. On the other hand, the transient irradiation creep component was lower in thermal neutron spectrum reactors than fast neutron spectrum reactors. Therefore, fast reactor irradiation creep data are not recommended for application to light water reactors.

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