SYMPOSIA PAPER Published: 01 January 1994

Swelling and Irradiation Creep of Neutron-Irradiated 316Ti and 15-15Ti Steels


The swelling and irradiation creep behavior of cold-worked 316Ti and 15-15Ti, two variants of austenitic steels in use as core component materials of the French fast reactors, are compared.

The use of 15-15Ti leads to a significant improvement due to an increase in the incubation dose for swelling.

The same phenomena observed in 316Ti are found in 15-15Ti. All materials that had not contained fuel that are samples, wrappers, or empty clad swell and creep less than real fuel pin cladding irradiated under the same conditions. To explain the swelling difference, as for 316Ti, a thermal gradient effect is invoked, but the irradiation creep difference is not understood. To predict the behavior of clad, it is essential to study defueled clad and to use specific rules.

All results confirm the good behavior of 15-15Ti, the best behavior being obtained with the 1% silicon-doped version irradiated up to 115 dpa.

Author Information

Maillard, A
DTA/CEREM/DTM/SRMA-Centre d'Etudes de Saclay, Gif-sur-Yvette, France
Touron, H
DTA/CEREM/DTM/SRMA-Centre d'Etudes de Saclay, Gif-sur-Yvette, France
Séran, J-L
DTA/CEREM/DTM/SRMA-Centre d'Etudes de Saclay, Gif-sur-Yvette, France
Chalony, A
DRN/DEC/SDC/LDAC-Centre d'Etudes de Cadarache, St Paul-lez-Durance, France
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Developed by Committee: E10
Pages: 824–837
DOI: 10.1520/STP23974S
ISBN-EB: 978-0-8031-5262-5
ISBN-13: 978-0-8031-1488-3