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Impurity Effects on Reduced-activation Ferritic Steels Developed for Fusion Applications by R.L. Klueh; E.T. Cheng; M.L. Grossbeck; E.E. Bloom is a scholarly article available to read on EtoBox.

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Reduced-activation steels are being developed for fusion applications by restricting alloying elements that produce long-lived radioactive isotopes when irradiated in the fusion neutron environment. Another source of long-lived isotopes is the impurities in the steel. To examine this, three heats of reduced-activation martensitic steel were analyzed by inductively coupled plasma mass spectrometry for low-level impurities that compromise the reduced-activation characteristics: a 5-ton heat of modi®ed F82H (F82H-Mod) for which an eort was made during production to reduce detrimental impurities, a 1-ton heat of JLF-1, and an 18-kg heat of ORNL 9Cr±2WVTa. Specimens from commercial heats of modi®ed 9Cr±1Mo and Sandvik HT9 were also analyzed. The objective was to determine the dierence in the impurity levels in the F82H-Mod and steels for which less eort was used to ensure purity. Silver, molybdenum, and niobium were found to be the tramp impurities of most importance. The F82H-Mod had the lowest levels, but in some cases the levels were not much dierent from the other heats. The impurity levels in the F82H-Mod produced with present technology did not achieve the low-activation limits fo

Author

R.L. Klueh; E.T. Cheng; M.L. Grossbeck; E.E. Bloom

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-3115)

Published

2000

Language

EN