SYMPOSIA PAPER Published: 01 January 2000

Reanalysis of Swelling and Irradiation Creep Data on 316 Type Stainless Steels Irradiated in the FFTF and Phénix Fast Reactors


In comparing results of irradiation creep experiments conducted by researchers in France and those by researchers at Pacific Northwest National Laboratory in the United States, quite different values for the creep-swelling coupling coefficient were reported. The differing coefficients complicated the understanding of the growing data base on irradiation creep. However, upon careful consideration, the French and US results showed key differences in experimental technique and analysis. The French and US irradiation creep experiments were conducted with several important differences that were initially thought to be of little consequence. One difference was related to whether stress-free swelling or stress-enhanced swelling was measured and used in calculating the creep strains. Inspection of irradiation creep results published by the French also showed their technique for extracting the creep-swelling coupling coefficient was different than that used by the present authors. In an effort to better understand the origin of the differing creep coefficients, data from the French and US experiments was reanalyzed taking into account these differences. In performing this reanalysis, completely consistent results were obtained.

Author Information

Toloczko, MB
Pacific Northwest National Laboratory, Richland, WA
Garner, FA
Pacific Northwest National Laboratory, Richland, WA
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Developed by Committee: E10
Pages: 655–666
DOI: 10.1520/STP12421S
ISBN-EB: 978-0-8031-5419-3
ISBN-13: 978-0-8031-2852-1